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Note: This page contains sample records for the topic "js rogers sr" from the National Library of EnergyBeta (NLEBeta).
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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

THE EDWARD S. ROGERS SR. DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING  

E-Print Network [OSTI]

: LG Source: Flickr #12;THE EDWARD S. ROGERS SR. DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING 4 Electronics n Kernel C: Communication Systems n Kernel D: Introduction to Electronic Devices n Depth A1: RF: Digital electronics n Science/Math Elective: Complex Variables n Design project: one term n Technical

Prodiæ, Aleksandar

2

Recovery Act update from Sr. Advisor Matt Rogers-- End of Obligations  

Broader source: Energy.gov [DOE]

Matt Rogers, Senior Advisor to the Secretary for Recovery Act Implementation, shares his thoughts as the Recovery Act reaches a critical milestone -- the end of the 2010 fiscal year and the last...

3

Recovery Act update from Sr. Advisor Matt Rogers -- End of Obligations  

ScienceCinema (OSTI)

Senior Advisor to the Secretary for Recovery Act Implementation Matt Rogers shares his thoughts as the Recovery Act reaches a critical milestone -- the end of the 2010 fiscal year and the last day to obligation contract and grant funding under the Recovery Act. For more information about the Recovery Act at the Department of Energy: http://www.energy.gov/recovery Follow the Department of Energy! http://facebook.com/energygov http://twitter.com/energy

Rogers, Matt

2013-05-29T23:59:59.000Z

4

Recovery Act update from Sr. Advisor Matt Rogers -- End of Obligations  

SciTech Connect (OSTI)

Senior Advisor to the Secretary for Recovery Act Implementation Matt Rogers shares his thoughts as the Recovery Act reaches a critical milestone -- the end of the 2010 fiscal year and the last day to obligation contract and grant funding under the Recovery Act. For more information about the Recovery Act at the Department of Energy: http://www.energy.gov/recovery Follow the Department of Energy! http://facebook.com/energygov http://twitter.com/energy

Rogers, Matt

2010-01-01T23:59:59.000Z

5

Roger M. Claycomb- Biography  

Broader source: Energy.gov [DOE]

Roger Claycomb has more than 30 years of experience in the nuclear industry in both nuclear facility operations and oversight.

6

Water Waves Roger Grimshaw  

E-Print Network [OSTI]

,2) provide a kinematic description of water waves, which to this point means that the conditionsWater Waves Roger Grimshaw May 7, 2003 Abstract A short review of the theory of weakly nonlinear water waves, prepared for the forthcoming Encyclopedia of Nonlinear Science 1 Introduction Water waves

7

Departure Roger Anthoine  

ScienceCinema (OSTI)

Remerciements et discours du D.G. H.Schopper à l'occasion du départ de Roger Anthoine (attaché de presse), qui travaillait dans la communication et quitte le Cern après 27 ans de service. Il gardait des relations avec des médias internationaux et la presse locale; remise des cadeaux: album photo avec images des musés de Genève et un radio aviation; R.A. fait un résumé de ses activités et souvenirs et remercie ses collaborateurs

None

2011-04-25T23:59:59.000Z

8

J.S. Lansing curriculum vitae Page 1 Curriculum Vitae  

E-Print Network [OSTI]

J.S. Lansing curriculum vitae Page 1 Curriculum Vitae J. STEPHEN LANSING Professor of Anthropology;J.S. Lansing curriculum vitae Page 2 FELLOWSHIPS and AWARDS 2007 Julian Steward Book Prize,671 #12;J.S. Lansing curriculum vitae Page 3 "Integrative Modelling of Environmental Change

Watkins, Joseph C.

9

Assistant Secretary Cathy Zoi and Senior Advisor Matt Rogers...  

Broader source: Energy.gov (indexed) [DOE]

Assistant Secretary Cathy Zoi and Senior Advisor Matt Rogers to Participate in Platts Energy Reporter Roundtable Assistant Secretary Cathy Zoi and Senior Advisor Matt Rogers to...

10

2003 Moisture Nolan Doesken and Roger Pielke, Sr.  

E-Print Network [OSTI]

Green and Odie Bliss http://climate.atmos.colostate.edu #12;Through 1999 #12;Through 1999 #12;0 5 10 15(inches) Fort Collins Total Water Year Precipitation (Oct-Sep) #12;#12;Reservoir StorageReservoir Storage 2003 Years Temperature(DegreesF) From NOAA, National Climatic Data Center #12;Fort Collins Summer

11

Roger Woodward Bland List of Publications  

E-Print Network [OSTI]

of the Prostate Results of a Prospective Study," Medical Dosimetry 33, 22-29. Bland, Roger, and Newell Garfield, "The ANTARES optical module," Nuclear Instruments and Methods Phys. Res. A 484 (2002), 369. Bland

Bland, Roger

12

A solar concentrating photovoltaic / thermal collector J.S. Coventry  

E-Print Network [OSTI]

A solar concentrating photovoltaic / thermal collector J.S. Coventry Centre for Sustainable Energy.Coventry@anu.edu.au Abstract Australia is a good location for solar concentrator applications. Current activities in Australia OF THE SOLAR RESOURCE IN AUSTRALIA Australia has relatively high solar insolation, as shown in figure 1

13

ME 4210: Manufacturing Processes and Engineering Prof. J.S. Colton GIT 2009  

E-Print Network [OSTI]

illegitimi carborundum ver. 1 #12;ME 4210: Manufacturing Processes and Engineering Prof. J.S. Colton © GIT

Colton, Jonathan S.

14

ME 4210: Manufacturing Processes and Engineering Prof. J.S. Colton GIT 2011  

E-Print Network [OSTI]

and Engineering Prof. J.S. Colton © GIT 2011 3 Ultrasonic Welding Plastic Metal Anvil Horn Materials being welded and Engineering Prof. J.S. Colton © GIT 2011 27 Brazing Uses · Join dissimilar materials ­ repairing metal parts;ME 4210: Manufacturing Processes and Engineering Prof. J.S. Colton © GIT 2011 2 Overview · Welding

Colton, Jonathan S.

15

Matt Rogers on AES Energy Storage | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Matt Rogers on AES Energy Storage Matt Rogers on AES Energy Storage Addthis Description The Department of Energy and AES Energy Storage recently agreed to a 17.1M conditional loan...

16

Evidential Symmetry and Mushy Credence Roger White  

E-Print Network [OSTI]

1 Evidential Symmetry and Mushy Credence Roger White MIT rog@mit.edu draft 4/07 The Principle arise. I'm wondering if the marble taken from this urn is black or white. I might have a rich body in the box has been selected from a shaken urn containing just five white and five black balls. Or I might

Fitelson, Branden

17

Matt Rogers on AES Energy Storage  

ScienceCinema (OSTI)

The Department of Energy and AES Energy Storage recently agreed to a $17.1M conditional loan guarantee commitment. This project will develop the first battery-based energy storage system to provide a more stable and efficient electrical grid for New York State's high-voltage transmission network. Matt Rogers is the Senior Advisor to the Secretary for Recovery Act Implementation.

Rogers, Matt

2013-05-29T23:59:59.000Z

18

CURRICULUM VITAE Dr. Dale S. Rogers  

E-Print Network [OSTI]

Administration (1983) Michigan State University Major: Materials and Logistics Management Bachelor of Arts (19791 CURRICULUM VITAE Dr. Dale S. Rogers Rutgers University Supply Chain Management & Marketing Professor of Logistics and Supply Chain Management, Co-Director of the Center for Supply Chain Management

Lin, Xiaodong

19

Rogers, Minnesota: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to: navigation, searchVirginia BlueRiverwoods,RockRipple, Indiana: EnergyRogers

20

ME 4210: Manufacturing Processes and Engineering Prof. J.S. Colton GIT 2011  

E-Print Network [OSTI]

ME 4210: Manufacturing Processes and Engineering Prof. J.S. Colton © GIT 2011 1 Rapid Prototyping ver. 1 #12;ME 4210: Manufacturing Processes and Engineering Prof. J.S. Colton © GIT 2011 2 Process · Additive fabrication ­ material is added, not removed · Direct fabrication from a CAD file · Layered

Colton, Jonathan S.

Note: This page contains sample records for the topic "js rogers sr" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

VBA-0032- In the Matter of Roger H. Hardwick  

Broader source: Energy.gov [DOE]

This Decision considers an Appeal of an Initial Agency Decision issued on July 6, 1999, on a complaint filed by Roger H. Hardwick (Hardwick or the complainant) under the Department of Energy (DOE)...

22

Roger A. Pielke Jr ho really killed John F. Kennedy?  

E-Print Network [OSTI]

Roger A. Pielke Jr W ho really killed John F. Kennedy? How many whales inhabit the oceans? How use than originally assumed, and have learned that the global ocean to power generation, refrigeration and agriculture,eachinventioncreatednewuncer- tainties: radiation

Colorado at Boulder, University of

23

VWA-0032- In the Matter of Roger W. Hardwick  

Broader source: Energy.gov [DOE]

This Decision involves a complaint of reprisal filed by Roger W. Hardwick (also referred to as the Complainant) under the Department of Energy’s (DOE) Contractor Employee Protection Program, 10 C.F...

24

Recent results from the G0 J.S. Real11,a  

E-Print Network [OSTI]

Recent results from the G0 experiment J.S. Real11,a , D. Androi´c1 , D. S. Armstrong2 , J. Arvieux3. Pate10 , S. K. Phillips2 , P. Pillot11 , M. L. Pitt15 , M. Poelker6 , B. Quinn7 , W. D. Ramsay8 , J

Paris-Sud XI, Université de

25

ME 6222: Manufacturing Processes and Systems Prof. J.S. Colton GIT 2011  

E-Print Network [OSTI]

temperatures, easy to diffusion bond. · Iron, titanium and copper also can be diffusion bonded, because · Diffusion bonding · Soldering and brazing · Fusion welding #12;ME 6222: Manufacturing Processes and Systems Prof. J.S. Colton © GIT 2011 3 Diffusion bonding · High pressure and temperature for extended periods

Colton, Jonathan S.

26

ME 4210: Manufacturing Processes and Engineering Prof. J.S. Colton GIT 2011  

E-Print Network [OSTI]

Definition · A microscopic mixture of two or more different materials. One typically being the continuous 4210: Manufacturing Processes and Engineering Prof. J.S. Colton © GIT 2011 11 #12;Stealth Ships ME 4210-up Material on stiffening structure Vacuum bag and fittings attached #12;ME 4210: Manufacturing Processes

Colton, Jonathan S.

27

A Structural Model of Markets in Madagascari J.S. Butler and Christine Moserii  

E-Print Network [OSTI]

capacity for identifying the factors contributing to market integration or to high transfer costs1 A Structural Model of Markets in Madagascari J.S. Butler and Christine Moserii June 2009 i Model of Markets in Madagascar Abstract Market efficiency and price transmission across space

Krivobokova, Tatyana

28

ME 4210: Manufacturing Processes and Engineering -Prof. J.S. Colton GIT 2011  

E-Print Network [OSTI]

or both · Open or closed (flash) · Key additional limitation ­ die pressure #12;ME 4210: ManufacturingME 4210: Manufacturing Processes and Engineering - Prof. J.S. Colton © GIT 2011 1 Topical Course Review No warranty as to completeness #12;ME 4210: Manufacturing Processes and Engineering - Prof. J

Colton, Jonathan S.

29

John Marshall Particle Flow Calorimetry 1 J.S. Marshall, M.A. Thomson  

E-Print Network [OSTI]

John Marshall Particle Flow Calorimetry 1 J.S. Marshall, M.A. Thomson University of Cambridge #12;John Marshall Particle Flow Calorimetry 2 Overview 1. e+e- Physics and LC Jet Energy Requirements 2 at CLIC 8. CLIC Benchmark Physics Analyses 9. Summary #12;John Marshall Particle Flow Calorimetry 3 e

Glasgow, University of

30

ME 6222: Manufacturing Processes and Systems Prof. J.S. Colton GIT 2009  

E-Print Network [OSTI]

­ Air (oxygen), vacuum, inert gas (argon) · Heating ­ External - electric, gas, oil ­ Internal Prof. J.S. Colton © GIT 2009 11 Processes · Sand · Shell · Plaster · Ceramic · Investment · Lost foam Metals processed by casting · Sand casting ­ 60% · Investment casting ­ 7% · Die casting ­ 9% · Permanent

Colton, Jonathan S.

31

Economics for a Creative World1 ROGER KOPPL  

E-Print Network [OSTI]

Economics for a Creative World1 ROGER KOPPL Whitman School of Management, Syracuse University Economics, 2015, to appear. #12;#12;Abstract Drawing on current biology, we argue that the phase space of economic evolution is not stable. Thus, there are no entailing laws of economic dynamics. In this sense

Longo, Giuseppe

32

Andrew D Booth Britain's Other "Fourth Man" Roger G. Johnson  

E-Print Network [OSTI]

. Keywords. Andrew Booth, Kathleen Booth, Norman Kitz, computer pioneer, Booth multiplier, magnetic drumAndrew D Booth ­ Britain's Other "Fourth Man" Roger G. Johnson Dept of Computer Science.johnson@bcs.org.uk Abstract. Andrew Donald Booth (1918-2009) was the leader of a team of computer pioneers at Birkbeck College

Paris-Sud XI, Université de

33

Rendering Implicit Flow Volumes Daqing Xue, Caixia Zhang, Roger Crawfis*  

E-Print Network [OSTI]

Rendering Implicit Flow Volumes Daqing Xue, Caixia Zhang, Roger Crawfis* Department of Computer and then rendered using an unstructured volume rendering technique. Unless a detailed refinement of the flow volume-dimensional texture mapping and an interval volume segmentation coupled with a tetrahedron projection-based renderer

Crawfis, Roger

34

THE EDWARD S. ROGERS SR. DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING  

E-Print Network [OSTI]

: LG Source: Flickr #12;iPhone 5 teardown Source: ifixit.com Parts that rely on electromagnetics A: Fields and Waves n Kernel B: Analog Electronics n Kernel C: Communication Systems n Kernel D: Introduction to Electronic Devices n Depth A1: RF/Microwave Circuits I n Depth A2: Radio & Microwave Wireless

Prodiæ, Aleksandar

35

Drought PerspectivesDrought Perspectives Nolan Doesken and Roger Pielke, Sr.  

E-Print Network [OSTI]

Center Prepared by Tara Green and Odie Bliss http://climate.atmos.colostate.edu #12;Fort Collins Summer 1969 1979 1989 1999 Years Temperature(Deg.F) Summer Total 7 year running mean #12;Fort Collins Historic Date PercentofAverage #12;What Comes Next? #12;#12;Fort Collins Accumulated Deficit for October 1997

36

Rogers County, Oklahoma: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to: navigation, searchVirginia BlueRiverwoods,RockRipple, Indiana: EnergyRogers County,

37

E-Print Network 3.0 - acropyga roger hymenoptera Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

to describe "the first species of Pyramica Roger, 1862 (Formicidae: Hymenoptera) from Suriname." The first... -64 (2008) www.mapress.comzootaxa New synonyms in neotropical...

38

8232 Federal Register / Vol. 74, No. 35 / Tuesday, February 24, 2009 / Notices March 18, 6:30 p.m ....................... Rogers City, MI ............................. Presque Isle District Library, 181 East Erie Street, Rogers City, MI  

E-Print Network [OSTI]

.m ....................... Rogers City, MI ............................. Presque Isle District Library, 181 East Erie Street, Rogers City, MI 49779. March 19, 6:30 p.m ....................... Harrisville, MI ............................... Harrisville Courthouse, 106 North 5th Street, Harrisville, MI 48740. March 20, 2 p

39

Publications of L C G Rogers: 1. `The interrelations between Moire patterns, contour fringes, optical sufaces and their  

E-Print Network [OSTI]

, optical sufaces and their sum and difference effects' (with G. L. Rogers), Optica Acta 24, 1977, 15­22. 2

40

LANL Researcher Roger Wiens Discusses ChemCam  

ScienceCinema (OSTI)

Discussion of the ChemCam instrument on the Curiosity Rover that occurred during the NASA press conference prior to launch of the Mars Science Laboratory. The ChemCam instrument was developed by Los Alamos National Laboratory and the French Space Institute. Los Alamos National Laboratory researcher Roger Wiens discusses the instrument on this video. ChemCam uses a laser to "zap" features of the Martian landscape and then uses a spectrometer to gather information about the composition of the sample. ChemCam will help the Curiosity Rover determine whether Mars is or was habitable. The Rover is expected to touch down on the Red Planet on August 5, 2012.

Wiens, Roger

2014-08-12T23:59:59.000Z

Note: This page contains sample records for the topic "js rogers sr" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Name Class PMAJ1 Abbas, Sami F SR MEE  

E-Print Network [OSTI]

Earl SR MEE Frey, Jeanette M SR CVE Friedman, Andrew David SR SYE Fujita, Naoki SR AEE Galvan, Ruben A SR ELE Hardine, Kyle W SR SYE Harper, John Louis SR MEE Heideman, Kyle SR OSE Held, Ethan Samuel SR Horton, Alan A SR CVE Hsu, Kevin SR MEE Hughes, John S SR ELE Hummel, Ryan M SR CVE Hung, Meng-han UNC

Wong, Pak Kin

43

TECHNICAL PUBLICATIONS & BOOKS PRESENTED/PUBLISHED GOMES J.S. & ALVES, F.B. (2013): "The Universe of the Oil & Gas Industry From Exploration to Refining", 780  

E-Print Network [OSTI]

Universe of the Oil & Gas Industry ­ From Exploration to Refining", 780 pages University textbook published by PARTEX Oil & Gas, Lisbon, Portugal. ISBN 9789892037783. GOMES J.S. (2012): "New Technologies in the Oil and Gas Industry", edited by J.S. Gomes, published by INTECH open science (www

Williams, John M.

44

Design Computing and Cognition DCC'12. J.S. Gero (ed), pp. xx-yy. Springer 2012  

E-Print Network [OSTI]

Design Computing and Cognition DCC'12. J.S. Gero (ed), pp. xx-yy. © Springer 2012 1 Role Grenoble, F-38031, France Elicitation of requirements is a key step of the design activity. The building of a shared understanding of design requirements is essential to the performance of the design. Personas

Paris-Sud XI, Université de

45

Design Computing and Cognition DCC'12. J.S. Gero (ed), pp. xx-yy. Springer 2012  

E-Print Network [OSTI]

Design Computing and Cognition DCC'12. J.S. Gero (ed), pp. xx-yy. © Springer 2012 1 Understanding Analogical Reasoning in Biomimetic Design: An Inductive Approach Hyunmin Cheong, Gregory Hallihan, and L designers ap- ply biological analogies to solve design problems. We recorded the discourse of fourth

Shu, Lily H.

46

The J-and H-bands of organic dye aggregates A. Eisfeld *, J.S. Briggs  

E-Print Network [OSTI]

The J- and H-bands of organic dye aggregates A. Eisfeld *, J.S. Briggs Theoretische Quantendynamik dyes are remarkable in exhibiting an intense and very narrow absorption peak, known as a J-band, which is red-shifted away from the region of monomer absorption. Apart from those dyes showing the J

Eisfeld, Alexander

47

CORBA-JS: An Open-Standards Framework for Distributed Object Computing over the Web Tejal B. Parulekar1  

E-Print Network [OSTI]

CORBA-JS: An Open-Standards Framework for Distributed Object Computing over the Web Tejal B technological limitations, DOC was traditionally unavailable in Web-based applications (i.e., stateful applications that communicate over HTTP, and are accessible via a Web browser) without the use of proprietary

Zhou, Yaoqi

48

Effect of Specimen Conditioning on Geosynthetic Clay Liner Shear J.S. McCartney & J.G. Zornberg  

E-Print Network [OSTI]

635 Effect of Specimen Conditioning on Geosynthetic Clay Liner Shear Strength J.S. McCartney & J of geosynthetic clay liners (GCLs) must replicate field conditions while still accounting for time and cost to conditioning. 1 INTRODUCTION Geosynthetic clay liners (GCLs) are prefabricated geocomposite materials used

Zornberg, Jorge G.

49

Compression Losses In Cryocoolers J.S. Reed, G. Davey, M.W. Dadd and P.B. Bailey  

E-Print Network [OSTI]

of these losses is related to the irreversible compression of gas in the cylinder, and the magnitude of this loss1 Compression Losses In Cryocoolers J.S. Reed, G. Davey, M.W. Dadd and P.B. Bailey Department and conditions this 'lumped' loss varies with operating frequency, swept volume and pressure swing, suggesting

50

Gas Spring Losses in Linear Clearance Seal Compressors P.B. Bailey, M.W. Dadd, J.S. Reed*  

E-Print Network [OSTI]

with a clearance seal linear compressor attached to a plain gas spring volume. The static flow through1 Gas Spring Losses in Linear Clearance Seal Compressors P.B. Bailey, M.W. Dadd, J.S. Reed* , C A fundamental loss mechanism in cryocoolers is associated with compression and expansion processes

51

Global episodic beta/gamma synchrony 1 Freeman & Rogers A neurobiological theory of meaning in perception.  

E-Print Network [OSTI]

Global episodic beta/gamma synchrony 1 Freeman & Rogers A neurobiological theory of meaning words: analytic phase, beta oscillation, EEG synchronization, gamma oscillation, Hilbert transform, phase transition Running Title: Global episodic beta/gamma synchrony #12;Global episodic beta

Freeman, Walter J.

52

A possible mechanism for ENSO turnabouts Bin Wang*, Renguang Wu, Roger Lukas, and Soon-Il An*  

E-Print Network [OSTI]

1 A possible mechanism for ENSO turnabouts Bin Wang*, Renguang Wu, Roger Lukas, and Soon-Il An to J. Climate July 8, 1999

Wang, Bin

53

SN 2009js AT THE CROSSROADS BETWEEN NORMAL AND SUBLUMINOUS TYPE IIP SUPERNOVAE: OPTICAL AND MID-INFRARED EVOLUTION  

SciTech Connect (OSTI)

We present a study of SN 2009js in NGC 918. Multi-band Kanata optical photometry covering the first {approx}120 days shows the source to be a Type IIP SN. Reddening is dominated by that due to our Galaxy. One-year-post-explosion photometry with the New Technology Telescope and a Subaru optical spectrum 16 days post-discovery both imply a good match with the well-studied subluminous SN 2005cs. The plateau-phase luminosity of SN 2009js and its plateau duration are more similar to the intermediate luminosity IIP SN 2008in. Thus, SN 2009js shares characteristics with both subluminous and intermediate luminosity supernovae (SNe). Its radioactive tail luminosity lies between SN 2005cs and SN 2008in, whereas its quasi-bolometric luminosity decline from peak to plateau (quantified by a newly defined parameter {Delta}logL, which measures adiabatic cooling following shock breakout) is much smaller than both the others'. We estimate the ejected mass of {sup 56}Ni to be low ({approx}0.007 M{sub Sun }). The SN explosion energy appears to have been small, similar to that of SN 2005cs. SN 2009js is the first subluminous SN IIP to be studied in the mid-infrared. It was serendipitously caught by Spitzer at very early times. In addition, it was detected by WISE 105 days later with a significant 4.6 {mu}m flux excess above the photosphere. The infrared excess luminosity relative to the photosphere is clearly smaller than that of SN 2004dj, which has been extensively studied in the mid-infrared. The excess may be tentatively assigned to heated dust with mass {approx}3 Multiplication-Sign 10{sup -5} M{sub Sun }, or to CO fundamental emission as a precursor to dust formation.

Gandhi, P. [Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, chuo-ku, Sagamihara, Kanagawa 252-5210 (Japan); Yamanaka, M.; Itoh, R. [Department of Physical Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526 (Japan); Tanaka, M. [National Astronomical Observatory, Mitaka, Tokyo (Japan); Nozawa, T.; Maeda, K.; Moriya, T. J. [Kavli Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwa (Japan); Kawabata, K. S. [Hiroshima Astrophysical Science Center, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526 (Japan); Saviane, I. [European Southern Observatory, Alonso de Cordova 3107, Santiago 19 (Chile); Hattori, T. [Subaru Telescope, National Astronomical Observatory of Japan, Hilo, HI 96720 (United States); Sasada, M. [Department of Astronomy, Graduate School of Science, Kyoto University, Kyoto 606-8502 (Japan)

2013-04-20T23:59:59.000Z

54

In: The Visual Neurosciences, L.M. Chalupa, J.S. Werner, Eds. MIT Press, 2003: 1603-1615. Principles of Image Representation in Visual Cortex  

E-Print Network [OSTI]

In: The Visual Neurosciences, L.M. Chalupa, J.S. Werner, Eds. MIT Press, 2003: 1603 representation #12;in area V1 in terms of a probabilistic model of natu- ral scenes. Section 2 will first provide

Olshausen, Bruno

55

NANOSENSOR DETECTS MERCURY IN WATER J.-S. Lee, M. S. Han, C. A. Mirkin, "Colorimetric Detection of Mercuric Ion (Hg2+  

E-Print Network [OSTI]

NANOSENSOR DETECTS MERCURY IN WATER J.-S. Lee, M. S. Han, C. A. Mirkin, "Colorimetric Detection ­ 0647560 Mercuric ion (Hg2+ ) is one of the most stable inorganic forms of mercury. It is also a caustic

Shull, Kenneth R.

56

Long Term Dynamics of Inequalities between French Households concerning Automobile COLLET, Roger; BOUCQ, Elise; MADRE, Jean-Loup; HIVERT, Laurent.  

E-Print Network [OSTI]

Long Term Dynamics of Inequalities between French Households concerning Automobile COLLET, Roger TERM DYNAMICS OF INEQUALITIES BETWEEN FRENCH HOUSEHOLDS CONCERNING AUTOMOBILE Roger Collet, INRETS of automobile. As the curves representing car ownership (number of cars per adult) and car use (annual mileage

Paris-Sud XI, Université de

57

Scientific Comment by Roger Pielke Sr. and Tom Chase with Input from John Christy and Tony Reale  

E-Print Network [OSTI]

entered the short 15-year data stream, it was considered inadequate for trend estimation-601. Stendel et al. clearly shows the abrupt shifts in ERA-15 at the time new satellites entered the mix long term trend values whether adjusted for instrument changes or not because there is a relatively

Pielke, Roger A.

58

Name Class PMAJ1 Abbasi, Mahad SR OSE  

E-Print Network [OSTI]

Balagopal, Tulika C. SR BE Balthazar, Michael A SR AEE Barnum, Matthew Nien Yi SO CHE Barzanjy, Zanyar, William Cyrus SR MEE Finkelstein, Aubrey J SR ENGR Fleischman, Megan Ashley SR MEE Fox, Bradley Hyland SR, Ari Joseph SR ENGR Goldstein, Samuel Jacob SR OSE Gosla, Calvin Bernard, III SR AEE Grosman, Joshua

Wong, Pak Kin

59

A contact theory for surface tension driven systems Roger A. Sauer 1  

E-Print Network [OSTI]

A contact theory for surface tension driven systems Roger A. Sauer 1 Aachen Institute for Advanced description for the contact of surface tension driven sys- tems. The example system of a liquid droplet liquids or two solids in contact. The surface kinematics, essential to the modeling of surface tension

60

United Nations Association -Nebraska Division Hears Roger Gold's "World's Water Problems"  

E-Print Network [OSTI]

water problem there is the lack of water during the dry season. In the monsoons, water is collectedUnited Nations Association - Nebraska Division Hears Roger Gold's "World's Water Problems Dictionary (1980), and the New York Times Everyday Dictionary (1982). One-toorders are many of the 54 Water

Nebraska-Lincoln, University of

Note: This page contains sample records for the topic "js rogers sr" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

A FRESH LOOK AT OFFSHORE WIND OPPORTUNITIES IN MASSACHUSETTS Anthony L. Rogers, Ph.D.  

E-Print Network [OSTI]

A FRESH LOOK AT OFFSHORE WIND OPPORTUNITIES IN MASSACHUSETTS Anthony L. Rogers, Ph.D. James F at Amherst Amherst, MA 01003 The utilization of offshore winds for generating electricity was first proposed that offshore wind development anywhere would be unlikely. More recently, a number of European countries have

Massachusetts at Amherst, University of

62

Transaction Time Support Inside a Database Engine David Lomet, Roger Barga  

E-Print Network [OSTI]

new data versions, thus maintaining such a com- plete, query-able history of states of the database. 1Transaction Time Support Inside a Database Engine David Lomet, Roger Barga Microsoft Research@cs.nyu.edu Abstract Transaction time databases retain and provide access to prior states of a database. An update

Mokbel, Mohamed F.

63

Planipes: Mobile Foot Pressure Analysis Samuel Pfaffen, Philipp Sommer, Christian Stocker, Roger Wattenhofer, and Samuel Welten  

E-Print Network [OSTI]

Planipes: Mobile Foot Pressure Analysis Samuel Pfaffen, Philipp Sommer, Christian Stocker, Roger drawback: They are non-mobile or at least obtrusive and therewith in- fluence the measurement. In the case have implemented Planipes, a mobile and versatile foot pressure measurement platform. It consists

64

Your Next Mobile Phone! Distributed Computing, ETH Zurich, www.disco.ethz.ch Roger Wattenhofer  

E-Print Network [OSTI]

Your Next Mobile Phone! Distributed Computing, ETH Zurich, www.disco.ethz.ch Roger Wattenhofer #12 Touch screen #12;[Fahrni et al., 2011] [Sommer et al., 2012] #12;The future of mobile phones? #12;#12;It's the software... #12;#12;Participatory Sensing = Web 2.0 Mobile #12;#12;#12;Monday #12;Monday #12;Monday #12

65

Jason S.Lamoureux, David Stuart, Roger Tsang, Cynthia Wu and  

E-Print Network [OSTI]

Jason S.Lamoureux, David Stuart, Roger Tsang, Cynthia Wu and J.N.Mark Glover1 Department of Biochemistry, University of Alberta, Edmonton, AB, T6G 2H7, Canada 1 Corresponding author e-mail: mark.glover

Glover, Mark

66

Mountain hydrology of the western United States Roger C. Bales,1  

E-Print Network [OSTI]

Mountain hydrology of the western United States Roger C. Bales,1 Noah P. Molotch,2,3 Thomas H, population growth, and land use change drive the need for new hydrologic knowledge and understanding. In the mountainous West and other similar areas worldwide, three pressing hydrologic needs stand out: first

California at Santa Barbara, University of

67

Piston-driven flow of highly concentrated suspensions Ralf B. Lukner and Roger T. Bonnecazea)  

E-Print Network [OSTI]

Piston-driven flow of highly concentrated suspensions Ralf B. Lukner and Roger T. Bonnecazea October 1998; final revision received 4 February 1999) Synopsis The piston-driven flow of highly concentrated suspensions 55% or 59% by volume solids of dense spheres was investigated as a function of piston

68

IEAB Independent Economic Roger Mann, Chair Hans Radtke, Vice-Chair  

E-Print Network [OSTI]

IEAB Independent Economic Roger Mann, Chair Hans Radtke, Vice-Chair Susan S. Hanna John Duffield Analysis Board Daniel D. Huppert Joel R. Hamilton Noelwah R. Netusil Economic Risk Associated with the Potential Establishment of Zebra and Quagga Mussels in the Columbia River Basin Independent Economic

69

Roger E Husser, Jr., M.S., P.E. Planning, Design & Construction  

E-Print Network [OSTI]

Roger E Husser, Jr., M.S., P.E. Director Planning, Design & Construction Herschel Hoffpauir Associate Director Campus Design & Construction Cliff Gillio Manager Mechanical Engineering Neal Pendleton Project Manager Architect Danielle Welborn Civil Engineer Planning, Design & Construction 1/13/2014 Hari

Harms, Kyle E.

70

Layers for Effective Volume Rendering Sundaresan Raman, Oleg Mishchenko, and Roger Crawfis, Member, IEEE Computer Society  

E-Print Network [OSTI]

Layers for Effective Volume Rendering Sundaresan Raman, Oleg Mishchenko, and Roger Crawfis, Member, IEEE Computer Society Abstract--A multi-layer volume rendering framework is presented. The final image is obtained by compositing a number of renderings, each being represented as a separate layer. This layer

Crawfis, Roger

71

Video Server on an ATM Connected Cluster of Workstations Olav Sandsta, Stein Langrgen, and Roger Midtstraum  

E-Print Network [OSTI]

Video Server on an ATM Connected Cluster of Workstations Olav Sandst°a, Stein Langørgen, and Roger-7034 Trondheim, Norway folavsa, steinl, rogerg@idi.ntnu.no Abstract Video servers are important for applicationswhich make use of digital video. The video servers should provide better functionality than most

72

The use and misuse of Vc,max in Earth System Models Alistair Rogers  

E-Print Network [OSTI]

REVIEW The use and misuse of Vc,max in Earth System Models Alistair Rogers Received: 18 November Dordrecht (outside the USA) 2013 Abstract Earth System Models (ESMs) aim to project global change. Central Á Vc,max Á Leaf nitrogen Á Earth System Models Introduction The primary goal of Earth System Models

Ohta, Shigemi

73

P 3.1 TROPICAL CYCLONE TORNADO RECORDS FOR THE MODERNIZED NWS ERA Roger Edwards1  

E-Print Network [OSTI]

is attributed to a combination of technological advances in documentation capabilities (e.g., digital camerasP 3.1 TROPICAL CYCLONE TORNADO RECORDS FOR THE MODERNIZED NWS ERA Roger Edwards1 Storm Prediction and BACKGROUND Tornadoes from tropical cyclones (hereafter TCs) pose a specialized forecast challenge at time

74

Abduction in Model Generative Reasoning Roger T. Hartley and Michael J. Coombs  

E-Print Network [OSTI]

Abduction in Model Generative Reasoning Roger T. Hartley and Michael J. Coombs Computer Science, 1990 1 Introduction Most of the abductive mechanisms in the literature are based on formalizations (binary) operations on these graphs. The equivalence of the method to logical abduction is noted

Hartley, Roger

75

Sr:s I  

Office of Legacy Management (LM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofofOxford SiteToledoSampling at the GrandSr:s I ] t _ . DOE/EV-0005/43

76

SR Newsletter. No. 31  

SciTech Connect (OSTI)

Topics covered in this issue include observation of decoupled diagmagnetic muon states in alkali halides by muon spin resonance, diffusion properties of the muon-produced soliton in trans-polyacetylene, pulsed muon spin resonance measurement of negative muon depolarization in muonic TC and UN, muonium to diamagnetic muon transition in KCl and NaCl revealed by time-differential muon spin resonance, recent topics in muon spin polarization phenomena and SR experiments, observation of muon-fluorine ''hydrogen'' bonding in ionic crystals, a spin rotator for muon-plus beams on the new M20 muon channel at TRIUMF, and resolved nuclear hyperfine structure of muonated free radicals using level crossing spectroscopy. (GHT)

Crowe, K.M.; Portis, A.M.; Yamazaki, T. (eds.)

1985-10-30T23:59:59.000Z

77

The use of otolith strontium isotopes (87Sr/86Sr) to identify nursery habitat for a threatened estuarine fish  

E-Print Network [OSTI]

9672-3 The use of otolith strontium isotopes ( 87 Sr/ 86 Sr)relationship between strontium isotope ratios ( 87 Sr/ 86indicate that otolith strontium isotopes ( 87 Sr/ 86 Sr) are

Hobbs, James A.; Lewis, Levi S.; Ikemiyagi, Naoaki; Sommer, Ted; Baxter, Randall D.

2010-01-01T23:59:59.000Z

78

Automatic Classi cation of Subdwarf Spectra using a Neural Network C. Winter 1 , C.S. Je ery 1 and J.S. Drilling 2  

E-Print Network [OSTI]

1 and J.S. Drilling 2 1 Armagh Observatory, College Hill, Armagh BT61 9DG, N. Ireland 2 Dept@arm.ac.uk, drilling@rouge.phys.lsu.edu Abstract We apply a multilayer feed-forward back propagation arti#12;cial neural network to a sample of 380 subdwarf spectra classi#12;ed by Drilling et al. (2002), showing

Jeffery, Simon

79

GPS World -With Racing Heart http://www.gpsworld.com/gpsworld/content/printContentPopup.js... 1 of 6 9/5/06 12:06 PM  

E-Print Network [OSTI]

GPS World - With Racing Heart http://www.gpsworld.com/gpsworld/content/printContentPopup.js... 1 of 6 9/5/06 12:06 PM Waist harness containing GPS receiver and helmet with antenna With Racing Heart of physics. A new Swiss system integrates GPS, video, and biosensors for precise position, velocity and heart

Vetterli, Martin

80

Vertices of Lie Modules Roger M. Bryant, Susanne Danz, Karin Erdmann, and Jrgen Mller  

E-Print Network [OSTI]

Vertices of Lie Modules Roger M. Bryant, Susanne Danz, Karin Erdmann, and Jürgen Müller September 9 studied by Erdmann#21;Tan [14], and by Bryant#21;Lim#21;Tan [5]. By [5, Thm. 1.2], one has dim(Lie pr F (n to the principal block of FS n , and Bryant#21;Erdmann [4] have studied indecomposable direct sum decompositions

Mueller, Jürgen

Note: This page contains sample records for the topic "js rogers sr" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Charles Roger Alcock, 1996 | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched5 Industrial CarbonArticlesHumanJune 2008 BasicCharles D. Scott, 1980 TheCharles Roger

82

DOE - Office of Legacy Management -- Rogers Iron Works Co - MO 10  

Office of Legacy Management (LM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou are herePAOsborne CoColorado RioMill SiteRockyRogers

83

Utility Scale Wind Turbines on a Grid Connected Island Mohit Dua, Anthony L. Rogers, James F. Manwell,  

E-Print Network [OSTI]

Utility Scale Wind Turbines on a Grid Connected Island Mohit Dua, Anthony L. Rogers, James F utility scale wind turbines on Fox Islands, located 12 miles from the coast of Maine in the United States of electricity itself. Three locations are analyzed in detail as potential sites for wind turbine installations

Massachusetts at Amherst, University of

84

Vertices of Lie Modules Roger M. Bryant, Susanne Danz, Karin Erdmann, and J#rgen M#ller  

E-Print Network [OSTI]

Vertices of Lie Modules Roger M. Bryant, Susanne Danz(LieprF(n))= dim(LieF(n)) has re* *cently been studied by Erdmann~Tan [14], and by Bryant~Lim~Tan [5]. By [5, Thm LiepfF(n) of LieF(n) always belongs to the principal block of F Sn, and Bryant~* *Erdmann [4] have

Mueller, Jürgen

85

A Review of "The Honourable Roger North, 1651-1734: On Life, Morality, Law and Tradition" by Jamie C. Kassler  

E-Print Network [OSTI]

refer- ence volume. Jamie C. Kassler. The Honourable Roger North, 1651-1734: On Life, Morality, Law and Tradition. Farnham, Surrey, UK: Ashgate Publishing Limited, 2009. xvii + 466 pp. + 8 illus. $114.95. Review by ellen j. jenkins, arkansas tech...

Jenkins, Ellen J.

2011-01-01T23:59:59.000Z

86

Fluorocarbon impurities in KrF lasers Helen H. Hwang, Kristopher James, Roger Hui, and Mark J. KushneP)  

E-Print Network [OSTI]

Fluorocarbon impurities in KrF lasers Helen H. Hwang, Kristopher James, Roger Hui, and Mark J, Urbana, Illinois 61801 (Received 24 January 1991; accepted for publication 7 March 1991) Fluorocarbon amounts of impurities, and flu- orocarbons in particular.' Fluorocarbons such as CF4 are common

Kushner, Mark

87

Delamere-JS  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed Newcatalyst phasesData Files Data Files 1B&W Y-12studies inBImpact of Cloud

88

A Review of "The Horrid Popish Plot’: Roger L’Estrange and the Circulation of Political Discourse in Late Seventeenth-Century London" by Peter Hinds  

E-Print Network [OSTI]

Horrid Popish Plot?: Roger L?Estrange and the Circulation of Political Discourse in Late Seventeenth-Century London. Oxford: Oxford University Press, 2010. xiv + 457 pp. + 37 illus. ?60.00. Review by adam swann, university of glasgow. Roger L... by a neglect that is out of all proportion to his importance and prolific writing output? (43), as Anne Dunan-Page and Beth Lynch?s Roger L?Estrange and the Making of Restoration Culture (2008) was the first in-depth study since the publication...

Swann, Adam

2011-01-01T23:59:59.000Z

89

SR????  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORNRecovery Act Funding3,13,10,6,

90

SR????  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORNRecovery Act

91

106:1038-1049, 2009. First published Feb 5, 2009; doi:10.1152/japplphysiol.90769.2008J Appl Physiol G. D. Mitsis, R. J. M. Governo, R. Rogers and K. T. S. Pattinson  

E-Print Network [OSTI]

G. D. Mitsis, R. J. M. Governo, R. Rogers and K. T. S. Pattinson You might find this additional. Mitsis,1,2,3,4 R. J. M. Governo,3,5 R. Rogers,2,3 and K. T. S. Pattinson2,3 1 Institute of Communications February 2009 Mitsis GD, Governo RJ, Rogers R, Pattinson KT. The effect of remifentanil on respiratory

Mitsis, Georgios

92

Zajac, R.N. 1999. Understanding the seafloor landscape in relation to assessing and managing impacts on coastal environments. Pp 211-227 in: J.S. Gray, W. Ambrose Jr., A. Szaniawska (eds) Biogeochemical Cycling and Sediment  

E-Print Network [OSTI]

of organisms, and have borne much of man's long history of development and associated environmental impacts IN RELATION TO IMPACT ASSESSMENT AND ENVIRONMENTAL MANAGEMENT IN COASTAL MARINE SEDIMENTS ROMAN N. ZAJAC impacts on coastal environments. Pp 211-227 in: J.S. Gray, W. Ambrose Jr., A. Szaniawska (eds

Zajac, Roman N.

93

Gunsch Jesse Andrew SR COE Spring 2009 Dean's List With Distinction  

E-Print Network [OSTI]

, Chandra M SR CHE Klein, Joshua SR EMG Klug, Brian Robert SR OSE Krause, Jacob Andrew JR OSE Lacy, Tyler Stephen JR ELE Laughlin, Amanda Diane JR CHE Leavy, Matthew James SR MEE Leick, Mark B SR BE #12;g Lu MEE Milakovich, Andrew J SR ELE Miller, Marcus Florian JR NMS Mohan, Ritika SR CHE Morey, Erica

Wong, Pak Kin

94

1.7 Gbit/in.2 gray-scale continuous-phase-change femtosecond image storage Q. Wang, J. Maddock, E. T. F. Rogers, T. Roy, C. Craig, K. F. Macdonald, D. W. Hewak, and N. I. Zheludev  

E-Print Network [OSTI]

. T. F. Rogers, T. Roy, C. Craig, K. F. Macdonald, D. W. Hewak, and N. I. Zheludev Citation: Applied-phase-change femtosecond image storage Q. Wang,1,2,a) J. Maddock,1 E. T. F. Rogers,1 T. Roy,1 C. Craig,1 K. F. Macdonald,1

Zheludev, Nikolay

95

Polarizabilities of the 87Sr Clock Transition  

E-Print Network [OSTI]

In this paper, we propose an in-depth review of the vector and tensor polarizabilities of the two energy levels of the 87Sr clock transition whose measurement was reported in [P. G. Westergaard et al., Phys. Rev. Lett. 106, 210801 (2011)]. We conduct a theoretical calculation that reproduces the measured coefficients. In addition, we detail the experimental conditions used for their measurement in two Sr optical lattice clocks, and exhibit the quadratic behaviour of the vector and tensor shifts with the depth of the trapping potential and evaluate their impact on the accuracy of the clock.

Shi, C; Eismann, U; Zawada, M; Lorini, L; Targat, R Le; Lodewyck, J

2015-01-01T23:59:59.000Z

96

Interface mechanics of adhesiveless microtransfer printing processes H.-J. Kim-Lee, A. Carlson, D. S. Grierson, J. A. Rogers, and K. T. Turner  

E-Print Network [OSTI]

electronics, advanced packaging schemes, and complex 3D microstructures that cannot be realizedInterface mechanics of adhesiveless microtransfer printing processes H.-J. Kim-Lee, A. Carlson, D microtransfer printing processes H.-J. Kim-Lee,1,a) A. Carlson,2 D. S. Grierson,1,b) J. A. Rogers,2 and K. T

Rogers, John A.

97

Mechanics of finger-tip electronics Yewang Su, Rui Li, Huanyu Cheng, Ming Ying, Andrew P. Bonifas, Keh-Chih Hwang, John A. Rogers, and  

E-Print Network [OSTI]

Mechanics of finger-tip electronics Yewang Su, Rui Li, Huanyu Cheng, Ming Ying, Andrew P. Bonifas Ying,4 Andrew P. Bonifas,4 Keh-Chih Hwang,1 John A. Rogers,4,b) and Yonggang Huang2,b) 1 Center into conformal, skin-like platforms that intimately, and non-invasively mount on the fingertips. Ying et al.15

Rogers, John A.

98

Zero Kinetic Energy Photofragment Spectroscopy: The Threshold Dissociation of NO2 J. A. Mueller, S. A. Rogers, and Paul L. Houston*  

E-Print Network [OSTI]

at the dissociation threshold of, while for higher energies, a new peak occurs as the energy threshold is reachedZero Kinetic Energy Photofragment Spectroscopy: The Threshold Dissociation of NO2 J. A. Mueller, S. A. Rogers, and Paul L. Houston* Department of Chemistry, Cornell UniVersity, Ithaca, New York 14853

Houston, Paul L.

99

This article appears in the Proceedings of the Connecticut College Symposium on Art and Technology, 2001. Copyright 2001, by Roger Dannenberg and Rob Fisher.  

E-Print Network [OSTI]

Production on the Brain Roger Dannenberg and Rob Fisher Studio for Creative Inquiry Carnegie Mellon. A multimedia planetarium show, "Gray Matters: The Brain Movie," was created to teach fundamental scientific concepts about the human brain. During the show, the planetarium dome represents a giant brain enclosing

Dannenberg, Roger B.

100

UMASS MINI-CODES FOR WIND ENERGY ENGINEERING APPLICATIONS J. F. Manwell, A. L. Rogers, J. G. McGowan, U. Abdulwaid  

E-Print Network [OSTI]

UMASS MINI-CODES FOR WIND ENERGY ENGINEERING APPLICATIONS J. F. Manwell, A. L. Rogers, J. G. Mc that these codes will be used for educational purposes, or for general use by the wind energy engineering community. ~TRODUCTIO~ BACKGROUND Computer codes are a valuable tool for practicing wind energy engineers. Wind

Massachusetts at Amherst, University of

Note: This page contains sample records for the topic "js rogers sr" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Kentucky River Pleasant Hill/ S.R.33 Burgin  

E-Print Network [OSTI]

Lexington U.S.68 S.R.1268 Wilmore S.R. 33 Kentucky River Mt. Zion Church Pleasant Hill/ S.R.33 Lexington on US 68 heading SSW. Drive across the Kentucky River ­ down palisades and up the other side, Mercer Co. Ky The church is located between the Kentucky River and Shaker Village. There is no indoor

Finkel, Raphael

102

Fabrication of Sr silicate buffer layer on Si(100) substrate by pulsed laser deposition using a SrO target  

SciTech Connect (OSTI)

The authors fabricated 2?×?1 Sr-reconstructed Si(100) substrates using thin SrO layers, and used them to direct growth of crystalline perovskite oxide on Si. The SrO layers used to reconstruct the Si(100) substrates were grown by pulsed laser deposition from a SrO single crystal target, followed by postdeposition-annealing (PDA) of the SrO/Si(100) structure. In situ observations of reflective high-energy electron diffraction during PDA confirmed a 2?×?1 reconstruction of the Si surface and x-ray photoemission spectroscopy of the annealed samples confirmed the existence of Sr atoms in a silicate phase, which indicated that a 2?×?1 Sr-reconstructed Si surface was achieved. The optimal fabrication conditions were annealing at 720?°C for 1?min and an equivalent SrO layer thickness (ML{sub eq}) of 2.5 ML{sub eq}. The temperature condition was very narrow, at 720?±?20?°C, for an acceptable product. Subsequently, the authors demonstrated the growth of crystalline SrTiO{sub 3} films on the 2?×?1 Sr-reconstructed Si(100) surfaces.

Imanaka, Atsuhiro; Sasaki, Tsubasa [Department of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280 (Japan); Hotta, Yasushi, E-mail: hotta@eng.u-hyogo.ac.jp; Satoh, Shin-ichi [Department of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280, Japan and CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012 (Japan)

2014-09-01T23:59:59.000Z

103

Carrier-Controlled Ferromagnetism in SrTiO3  

DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

Magnetotransport and superconducting properties are investigated for uniformly La-doped SrTiO3 films and GdTiO3/SrTiO3 heterostructures, respectively. GdTiO3/SrTiO3 interfaces exhibit a high-density 2D electron gas on the SrTiO3 side of the interface, while, for the SrTiO3 films, carriers are provided by the dopant atoms. Both types of samples exhibit ferromagnetism at low temperatures, as evidenced by a hysteresis in the magnetoresistance. For the uniformly doped SrTiO3 films, the Curie temperature is found to increase with doping and to coexist with superconductivity for carrier concentrations on the high-density side of the superconducting dome. The Curie temperature of the GdTiO3/SrTiO3 heterostructures scales with the thickness of the SrTiO3 quantum well. The results are used to construct a stability diagram for the ferromagnetic and superconducting phases of SrTiO3.

Moetakef, Pouya; Williams, James R.; Ouellette, Daniel G.; Kajdos, Adam P.; Goldhaber-Gordon, David; Allen, S. James; Stemmer, Susanne

2012-06-01T23:59:59.000Z

104

Photoionisation loading of large Sr+ ion clouds with ultrafast pulses  

E-Print Network [OSTI]

This paper reports on photoionisation loading based on ultrafast pulses of singly-ionised strontium ions in a linear Paul trap. We take advantage of an autoionising resonance of Sr neutral atoms to form Sr+ by two-photon absorption of femtosecond pulses at a wavelength of 431nm. We compare this technique to electron-bombardment ionisation and observe several advantages of photoionisation. It actually allows the loading of a pure Sr+ ion cloud in a low radio-frequency voltage amplitude regime. In these conditions up to 4x10^4 laser-cooled Sr+ ions were trapped.

Sébastien Removille; Romain Dubessy; Quentin Glorieux; Samuel Guibal; Thomas Coudreau; Luca Guidoni; Jean-Pierre Likforman

2008-12-05T23:59:59.000Z

105

Chicane Status Chris RogersChris Rogers,  

E-Print Network [OSTI]

Beam Power #12;8 Beam Energy Before Chicane #12;9 Beam Energy After Chicane and absorber Origin? #12;10 Beam Energy After Cooler Origin? #12;11 Open Issues Can we recover lost performance in G4BL? Running beam power lost for different particle species Examine energy spectrum ­ propose enhanced particle

McDonald, Kirk

106

CIRES/GSD Professional Research Assistant Sr. HPC Systems Engineer  

E-Print Network [OSTI]

forecasts. ESRL/GSD is a part of NOAA's Research and Development High Performance Computing Systems Program of GSD is looking for a temporary (12 mo) full-time Sr. High Performance Computing (HPC) System Engineer to support multiple state-of-the-art High Performance Computers in Boulder, CO and Fairmont, WV. The Sr

Colorado at Boulder, University of

107

History of development and depositional environment and upper Cherokee Prue Sand, Custer and Roger Mills counties, Oklahoma  

SciTech Connect (OSTI)

In western Oklahoma the uppermost sand member of the Cherokee Group, the True sand, was first drilled and found productive in two discoveries, completed in 1980, in west-central Custer County and in central Roger Mills County, Oklahoma. For 1 1/2 to 2 years these two discoveries, some 18 mi (29 km) apart, were thought to be stratigraphic equivalents of two separate sand bodies occurring parallel to the classic northwest-southeast-trending systems of the Anadarko basin. At present, some 40 productive wells will ultimately produce more than 100 bcf of gas and 3 million bbl of condensate from an average depth of 11,500 ft (3500 m). Sand porosities range from 3 to 18% with most producing wells having porosities in the 12 to 15% range. Because Prue sand is slightly overpressured (a pressure gradient of .53 psi/foot), the reserves are generally better than normal-pressured wells at this depth. The sand body is over 40 mi (64 km) in length, 1 to 1.5 mi (1.6 to 2.4 km) wide, and 60 ft (18 m) thick. Study of the core shows the interval to grade from a medium to fine-grained sand, highly laminated and cross-bedded with black shale, to a slightly coarser grained nonstructured interval and back into a highly laminated cross-bedded sandy black shale interval. The interval is topped by a 10 ft (3 m) thick black shale layer that is a predominant bed throughout the whole area. These conclusions have implications that may assist in the exploration of other Pennsylvanian sands in this area.

Baumann, D.K.; Peterson, M.L.; Hunter, L.W.

1983-03-01T23:59:59.000Z

108

Marshall, J.S., Gardner, T.W., Protti, M., and Nourse, J.A., 2009, International geosciences field research with undergraduate students: Three models for expe-riential learning projects investigating active tectonics of the Nicoya Peninsula, Costa Rica, i  

E-Print Network [OSTI]

1 Marshall, J.S., Gardner, T.W., Protti, M., and Nourse, J.A., 2009, International geosciences. Marshall Geological Sciences Department, Cal Poly Pomona University, Pomona, California 91768, USA Thomas W of their home learning environment, international field #12;2 Marshall et al. spe461-08 page 2 of 22

Marshall, Jeffrey S.

109

VBH-0083- In the Matter of S.R. Davis  

Broader source: Energy.gov [DOE]

S.R. Davis (the Employee) filed a complaint against her former employer, Fluor Fernald, Inc. (the Contractor) under the Department of Energy (DOE) Contractor Employee Protection Program, 10 C.F.R....

110

10.1071/SR10009_AC1 CSIRO 20102  

E-Print Network [OSTI]

10.1071/SR10009_AC1 ©CSIRO 20102 Accessory Publication: Australian Journal of Soil Research, 2010 recovered from the supernatant by22 centrifugation at 2000 x G. Samples where then washed 3 times

Lehmann, Johannes

111

Seasonal dripwater Mg/Ca and Sr/Ca variations driven by cave ventilation: Implications for and modeling  

E-Print Network [OSTI]

Seasonal dripwater Mg/Ca and Sr/Ca variations driven by cave ventilation: Implications of Mg/ Ca (and Sr/Ca) and Sr isotopes is key in delineating whether Mg/Ca and Sr/Ca variations seasonal variations in dripwater Mg/Ca and Sr/Ca, whereas the other drip sites do not. In contrast

Banner, Jay L.

112

Brian Rogers Susan Henrichs  

E-Print Network [OSTI]

& Alumni VACANT Dir, Alumni Relations Mark Myers Vice Chancellor Research John Blake Assoc. Vice Chancellor Chancellor Research, Intellectual Property & Commercialization (PT) Gary Gray Director Athletics Nettie

Hartman, Chris

113

Superlattice Structure and Precipitates in O+ and Zr+ Ion Coimplanted SrTiO3: a Model Waste Form for 90Sr  

SciTech Connect (OSTI)

We investigate strontium titanate as a model waste form for 90Sr. Implantation with O+ and Zr+ ions, followed by annealing at 1423 K, was performed to simulate 90Sr to 90Zr decays. At low Zr concentrations, we observe formation of a ZrO-Sr superlattice structure. Ab initio calculations indicate that this atomic configuration is energetically favorable. At higher Zr concentrations, we observe precipitates of ZrO2 with a coherently strained interface, or a monolayer of disordered interfacial structure. Potential candidacy of 90SrTiO3 as a waste form for permanent disposal of 90Sr is discussed.

Jiang, Weilin; Van Ginhoven, Renee M.; Kovarik, Libor; Jaffe, John E.; Arey, Bruce W.

2012-07-13T23:59:59.000Z

114

Optical and structural stability of blue SrO:Eu{sup 2+} phosphor  

SciTech Connect (OSTI)

Chemical stability of 6-coodinated SrO is a fundamental problem when this is used for various applications. In this study, optical and chemical stabilities of 8-coordinated SrO:Eu{sup 2+} phosphor were investigated. SrO:Eu{sup 2+} phosphor was synthesized from thermal treatment of SrO:Eu powder located on a single crystalline MgO at 1500° C under reduction atmosphere. Obtained 8-coordinated SrO:Eu{sup 2+} phosphor exhibit strong blue luminescence and chemical stability in distilled water for 3 days. Our findings prove that obtained 8-coordinated SrO:Eu{sup 2+} possesses relative optical and chemical stabilities in water. - Graphical abstract: Obtained 8-coordinated SrO:Eu{sup 2+} phosphor exhibit strong blue luminescence in distilled water. Highlights: • We investigated optical and chemical stabilities of 8-coordinated SrO:Eu{sup 2+} phosphor in water. • Obtained 8-coordinated SrO:Eu{sup 2+} phosphor exhibit strong blue luminescence and chemical stability in distilled water for 3 days. • We found that the 8-coodrodinated SrO crystal structure changed to SrCO{sub 3} crystal structure after the 5 days immersion. • The obtained SrO:Eu{sup 2+} phosphor possesses high chemical stability under water, compared with commercial (6-coordinated) SrO.

Komatsu, Keiji, E-mail: Keiji_Komatsu@mst.nagaokaut.ac.jp [Department of Material Science and Technology, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188 (Japan); Nakamura, Atsushi [Department of Material Science and Technology, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188 (Japan); Chubu Chelest Co. Ltd., 3-3-3 Hinagahigashi, Yokkaichi, Mie 510-0886 (Japan); Ohshio, Shigeo; Toda, Ikumi; Muramatsu, Hiroyuki; Saitoh, Hidetoshi [Department of Material Science and Technology, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188 (Japan)

2013-08-15T23:59:59.000Z

115

Laser system for secondary cooling of {sup 87}Sr atoms  

SciTech Connect (OSTI)

A laser system with a narrow generation line for secondary laser cooling of {sup 87}Sr atoms has been developed and investigated. It is planned to use ultracold {sup 87}Sr atoms loaded in an optical lattice in an optical frequency standard. To this end, a 689-nm semiconductor laser has been stabilised using an external reference ultrastable cavity with vibrational and temperature compensation near the critical point. The lasing spectral width was 80 Hz (averaging time 40 ms), and the frequency drift was at a level of 0.3 Hz s{sup -1}. Comparison of two independent laser systems yielded a minimum Allan deviation: 2 Multiplication-Sign 10{sup -14} for 300-s averaging. It is shown that this system satisfies all requirements necessary for secondary cooling of 87Sr atoms using the spectrally narrow {sup 1}S{sub 0} - {sup 3}P{sub 1} transition ({lambda} = 689 nm). (cooling of atoms)

Khabarova, K Yu; Slyusarev, S N; Strelkin, S A; Belotelov, G S; Kostin, A S; Pal'chikov, Vitaly G; Kolachevsky, Nikolai N

2012-11-30T23:59:59.000Z

116

Irradiation behavior of SrTiO3 at temperatures close to the critical...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

for amorphization. Abstract: Damage accumulation on both the Sr and Ti sublattices in strontium titanate (SrTiO3) has been investigated under 1.0 MeV Au+ irradiation at 360 and 400...

117

Structure, magnetic properties and magnetoelastic anisotropy in epitaxial Sr(Ti???Co?)O? films  

E-Print Network [OSTI]

We report the structure, magnetic properties and magnetoelastic anisotropy of epitaxial Sr(Ti???Co?)O? films grown on LaAlO? (001) and SrTiO? (001) substrates by pulsed laser deposition. Room temperature ferromagnetism was ...

Bi, Lei

118

Precise Measurement of Strontium-82 Radioactivity in the Sr-Rb...  

Office of Science (SC) Website

by extracting it from an 82Sr-82Rb generator. Much as a battery is used to store electricity, the radioactive 82Sr with its long 25.35 days half-life serves as an "82Rb...

119

Coccolith Sr/Ca as a new indicator of coccolithophorid calcification and growth rate  

E-Print Network [OSTI]

Coccolith Sr/Ca as a new indicator of coccolithophorid calcification and growth rate Heather M in the eastern equatorial Pacific show variations of $ 15% in Sr/Ca ratios across the equatorial upwelling zone, with Sr/Ca highest at the equator and decreasing off-axis. These variations cannot be due to changes

Schrag, Daniel

120

Synthesis of BiPbSrCaCuO superconductor  

DOE Patents [OSTI]

A process and a precursor composition for preparing a lead-doped bismuth-strontium-calcium-copper oxide superconductor of the formula Bi.sub.a Pb.sub.b Sr.sub.c Ca.sub.d Cu.sub.e O.sub.f wherein a is from about 1.7 to about 1.9, b is from about 0.3 to about 0.45, c is from about 1.6 to about 2.2, d is from about 1.6 to about 2.2, e is from about 2.97 to about 3.2 and f is 10.+-.z by reacting a mixture of Bi.sub.4 Sr.sub.3 Ca.sub.3 Cu.sub.4 O.sub.16.+-.z, an alkaline earth metal cuprate, e.g., Sr.sub.9 Ca.sub.5 Cu.sub.24 O.sub.41, and an alkaline earth metal plumbate, e.g., Ca.sub.2-x Sr.sub.x PbO.sub.4 wherein x is about 0.5, is disclosed.

Hults, William L. (Los Alamos, NM); Kubat-Martin, Kimberly A. (Espanola, NM); Salazar, Kenneth V. (Espanola, NM); Phillips, David S. (Los Alamos, NM); Peterson, Dean E. (Los Alamos, NM)

1994-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "js rogers sr" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Synthesis of BiPbSrCaCuO superconductor  

DOE Patents [OSTI]

A process and a precursor composition for preparing a lead-doped bismuth-strontium-calcium-copper oxide superconductor of the formula Bi[sub a]Pb[sub b]Sr[sub c]Ca[sub d]Cu[sub e]O[sub f] wherein a is from about 1.7 to about 1.9, b is from about 0.3 to about 0.45, c is from about 1.6 to about 2.2, d is from about 1.6 to about 2.2, e is from about 2.97 to about 3.2 and f is 10[+-]z by reacting a mixture of Bi[sub 4]Sr[sub 3]Ca[sub 3]Cu[sub 4]O[sub 16[+-]z], an alkaline earth metal cuprate, e.g., Sr[sub 9]Ca[sub 5]Cu[sub 24]O[sub 41], and an alkaline earth metal plumbate, e.g., Ca[sub 2[minus]x]Sr[sub x]PbO[sub 4] wherein x is about 0.5, is disclosed.

Hults, W.L.; Kubat-Martin, K.A.; Salazar, K.V.; Phillips, D.S.; Peterson, D.E.

1994-04-05T23:59:59.000Z

122

Radioactive contamination of SrI2(Eu) crystal scintillator  

E-Print Network [OSTI]

A strontium iodide crystal doped by europium (SrI2(Eu)) was produced by using the Stockbarger growth technique. The crystal was subjected to characterisation that included relative photoelectron output and energy resolution for gamma quanta. The intrinsic radioactivity of SrI2(Eu) crystal scintillator was tested both in scintillation mode and by using ultra-low background HPGe gamma spectrometry deep underground. The response of the SrI2(Eu) detector to alpha particles (alpha/beta ratio and pulse shape) was estimated by analysing the 226Ra trace contamination internal to the crystal. We have found alpha/beta=0.55 and no difference in scintillation decay for alpha particles and gamma quanta. The application of the obtained results in the search for the double electron capture and electron capture with positron emission in 84Sr has been investigated at a level of sensitivity T_1/2 \\sim 10^15-10^16 yr. The results of these studies demonstrate the potentiality of this material for a variety of scintillation appli...

Belli, P; Cerulli, R; Danevich, F A; Galenin, E; Gektin, A; Incicchitti, A; Isaienko, V; Kobychev, V V; Laubenstein, M; Nagorny, S S; Podviyanuk, R B; Tkachenko, S; Tretyak, V I

2011-01-01T23:59:59.000Z

123

SR/OIAF/2003-02 Analysis of S.139,  

E-Print Network [OSTI]

and Greenhouse Gases Division and Acting Director of the Coal and Electric Power Division; James M. Kendell (jkendell@eia.doe.gov, 202/586 9646), Director, Oil and Gas Division; and Andy S. Kydes (andySR/OIAF/2003-02 Analysis of S.139, the Climate Stewardship Act of 2003 June 2003 Energy Information

Ford, Andrew

124

Subcontract Report NREL/SR-7A2-48318  

E-Print Network [OSTI]

DSM demand side management EB existing buildings EEPS Energy Efficiency Portfolio Standard EER energySubcontract Report NREL/SR-7A2-48318 June 2010 Hawaii Clean Energy Initiative Existing Building Existing Building Energy Efficiency Analysis November 17, 2009 ­ June 30, 2010 P. Finch and A. Potes Booz

125

Temperature dependence of magnetic properties of La0.7Sr0.3MnO3SrTiO3 thin films on silicon substrates  

E-Print Network [OSTI]

by a 20-nm-thick SrTiO3 001 buffer layer. X-ray diffraction and atomic force microscopy studies. INTRODUCTION Perovskite manganites RE 1-x AE xMnO3, where RE =rare earth and AE=alkaline earth formTemperature dependence of magnetic properties of La0.7Sr0.3MnO3Ã?SrTiO3 thin films on silicon

Boyer, Edmond

126

NAME AWARD NAME COLLEGE CLASS Adler, Karen Robin Frederic J. Shepler Memorial Prize in French LA SR  

E-Print Network [OSTI]

Theresa McDermott Carzo Award LA SR Ammar, Maya Architectural Studies Prize LA SR Andrews, Tyler Cummings or Scholarly Work LA SR Berkowitz, Stacey B. R.M. Karapetoff Cobb Chemistry Fund Prize LA JR Bernstein, Esther Shulia Jane Ann Herman Prize LA SR Blumenthal, Scott B. Alex Elias Memorial Prize Scholarship LA JR

Dennett, Daniel

127

Impact of Sr segregation on the electronic structure and oxygen reduction activity of SrTi[subscript 1?x]Fe[subscript x]O[subscript 3] surfaces  

E-Print Network [OSTI]

The correlation between the surface chemistry and electronic structure is studied for SrTi[subscript 1?x]Fe[subscript x]O[subscript 3] (STF), as a model perovskite system, to explain the impact of Sr segregation on the ...

Chen, Yan

128

Mechanism for enhanced oxygen reduction kinetics at the (La,Sr)CoO3??/(La,Sr)2CoO4+? hetero-interface  

E-Print Network [OSTI]

The recently reported fast oxygen reduction kinetics at the interface of (La,Sr)CoO3?? (LSC113) and (La,Sr)2CoO4+? (LSC214) phases opened up new questions for the potential role of dissimilar interfaces in advanced cathodes ...

Han, Jeong Woo

129

Ferromagnetic Mn moments at SrRuO3/SrMnO3 interfaces Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439  

E-Print Network [OSTI]

Ferromagnetic Mn moments at SrRuO3/SrMnO3 interfaces Y. Choia Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 Y. Z. Yoo, O. Chmaissem, A. Ullah, S. Kolesnik, and C. W University, DeKalb, Illinois 60115 D. Haskel Advanced Photon Source, Argonne National Laboratory, Argonne

Haskel, Daniel

130

Premelting Dynamics J.S. Wettlaufer1  

E-Print Network [OSTI]

that are familiar to those working in fluid mechanics: wetting phenomena and thermophoretic (Marangoni) flows

Worster, M. Grae

131

Dragdealer.js | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeat Pump Models |Conduct, Parent(CRADA and DOWDepartmentDraft-O-Meter

132

Gruppe Zeit Ort Sprache 1 Montag, 14-16 Uhr SR Westbau UG Deutsch  

E-Print Network [OSTI]

Tabelle1 Seite 1 Gruppe Zeit Ort Sprache 1 Montag, 14-16 Uhr SR Westbau UG Deutsch 2 Montag, 14-16 Uhr SozR GMH Deutsch 3 Seminarraum A im FMF* Englisch 4 Seminarraum C im FMF* Deutsch 5 SR Westbau 2.OG Deutsch 6 Mittwoch, 14-16 Uhr HS I Englisch 7 Mittwoch, 16-18 Uhr SozR GMH Deutsch 8 SR Westbau 2

Timmer, Jens

133

3d X 3d X SrTiO3Ti 2p 3d  

E-Print Network [OSTI]

XX 3d X 3d X X XX X XX SrTiO3Ti 2p 3d SrTiO3Ti 2p 3d 2p 2p SrTiO3 ts) 2p3/2 (t2g) 2p3/2 (e ) 2p1/2 (eg)2p SrTiO3 3d unit (t2g) (eg) (eg)2p1/2 (t2g)3d (Ti Fe Cu) arb. ( 2g) (Ti, Fe, Cu) y(ansitynten 3d In 3d 468464460456 · Photon Energy (e

Katsumoto, Shingo

134

A Sr-Isotopic Comparison Between Thermal Waters, Rocks, And Hydrotherm...  

Open Energy Info (EERE)

Sr-Isotopic Comparison Between Thermal Waters, Rocks, And Hydrothermal Calcites, Long Valley Caldera, California Jump to: navigation, search OpenEI Reference LibraryAdd to library...

135

MHK Projects/SR 01 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision hasInformation Earth's Heat JumpIncMAKGalway Bay IE < MHK Project City Tunica0,LA ProjectSR 01

136

Degradation Mechanism in La0.8Sr0.2CoO3 [La subscript 0.8 Sr subscript 0.2 CoO subscript 3] as Contact Layer on the Solid Oxide Electrolysis Cell Anode  

E-Print Network [OSTI]

Detailed chemical and structural analyses are presented for the degradation mechanism of La0.8Sr0.2CoO3 [La subscript 0.8 Sr subscript 0.2 CoO subscript 3

Sharma, Vivek Inder

137

90Sr liquid scintillation urine analysis utilizing different approaches for tracer recovery.  

SciTech Connect (OSTI)

90Sr is one of the isotopes most commonly produced by nuclear fission. This medium lived isotope presents serious challenges to radiation workers, the environment, and following a nuclear event, the general public. Methods of identifying this nuclide have been in existence for a number of years (e.g. Horwitz, E.P. [1], Maxwell, S.L.[2], EPA 905.0 [3]) which are time consuming, requiring a month or more for full analysis. This time frame is unacceptable in the present security environment. It is therefore important to have a dependable and rapid method for the determination of Sr. The purposes of this study are to reduce analysis time to less than half a day by utilizing a single method of radiation measurement while continuing to yield precise results. This paper presents findings on three methods that can meet this criteria; (1) stable Sr carrier, (2) 85Sr by gamma spectroscopy, and (3) 85Sr by LSC. Two methods of analyzing and calculating the 85Sr tracer recovery were investigated (gamma spectroscopy and a low energy window-Sr85LEBAB by LSC) as well as the use of two different types of Sr tracer (85Sr and stable Sr carrier). Three separate stock blank urine samples were spiked with various activity levels of 239Pu, 137Cs, 90Sr /90Y to determine the effectiveness of the Eichrome Sr-spec%C2%AE resin 2mL extractive columns. The objective was to compare the recoveries of 85Sr versus a stable strontium carrier, attempt to compare the rate at which samples can be processed by evaluating evaporation, neutralization, and removing the use of another instrument (gamma spectrometer) by using the LSC spectrometer to obtain 85Sr recovery. It was found that when using a calibration curve comprised of a different cocktail and a non-optimum discriminator setting reasonable results (bias of %C2%B1 25%) were achieved. The results from spiked samples containing 85Sr demonstrated that a higher recovery is obtained when using gamma spectroscopy (89-95%) than when using the LEB window from LSC (120-470%). The high recovery for 85Sr by LSC analysis may be due to the interference/cross talk from the alpha region since alpha counts were observed in all sample sets. After further investigation it was determined that the alpha counts were due to 239Pu breakthrough on the Sr-spec%C2%AE column. This requires further development to purify the Sr before an accurate tracer recovery determination can be made. Sample preparation times varied and ranged from 4-6 hours depending on the specific sample preparation process. The results from the spiked samples containing stable strontium nitrate Sr(NO3)2 carrier demonstrate that gravimetric analysis yields the most consistent high recoveries (97-101%) when evaporation is carefully performed. Since this method did not have a variation on the tracer recovery method, the samples were counted in 1) LEB/Alpha/Beta mode optimized for Sr-90, 2) DPM for Sr-90, and 3) general LEB/Alpha/Beta mode. The results (from the known) ranged from 79-104%, 107-177%, and 85-89% for 1, 2, and 3 respectively. Counting the prepared samples in a generic low energy beta/alpha/beta protocol yielded more accurate and consistent results and also yielded the shortest sample preparation turn-around-time of 3.5 hours.

Piraner, Olga [Centers for Disease Control and Prevention, Atlanta, GA; Preston, Rose T. [Sandia Staffing Alliance, LLC, Albuquerque, NM; Shanks, Sonoya Toyoko; Jones, Robert [Centers for Disease Control and Prevention, Atlanta, GA

2010-08-01T23:59:59.000Z

138

SR-2508 plus buthionine sulfoximine or SR-2508 alone: effects on the radiation response and the glutathione content of a human tumor xenograft  

SciTech Connect (OSTI)

This study determined the radiosensitivity of the human tumor xenograft HT29 and its glutathione (GSH) and cysteine (CYS) contents after treatment with both buthionine sulfoximine (BSO) and SR-2508 or SR-2508 alone. Tumor radiosensitivity was assessed by the in vitro colony assay and thiol content was measured by high-performance liquid chromatography. The radiosensitizing effect of SR-2508 is dose dependent and increases when higher doses of radiation are given. SR-2508 given alone does not modify GSH and CYS content; however, when given with BSO, the GSH level is significantly reduced, yet radiosensitivity of the HT29 tumor is only slightly increased. These results have been compared to our previously observed results of HT29 treatment with misonidazole (MISO), BSO, or MISO + BSO.

Lespinasse, F.; Biscay, P.; Malaise, E.P.; Guichard, M.

1987-04-01T23:59:59.000Z

139

Oxygen Surface Exchange Kinetics on Sr-Substituted Lanthanum Manganite and Ferrite Thin-Film Microelectrodes  

E-Print Network [OSTI]

The surface oxygen exchange kinetics occurring on dense La0.8Sr0.2MnO3 (65nm thick) and La0.8Sr0.2FeO3 (110nm thick) thin films were investigated by electrochemical impedance spectroscopy (EIS). Rutherford backscattering ...

la O', Gerardo Jose

140

Michael O. Rabin Thomas J. Watson Sr. Research Professor of Computer Science  

E-Print Network [OSTI]

Michael O. Rabin Thomas J. Watson Sr. Research Professor of Computer Science Harvard University 1964-66 Chairman, Institute of Mathematics, Hebrew University 1970-71 Chairman, Computer Science Science, Harvard University 1983-2012 Thomas J. Watson Sr. Professor of Computer Science, Harvard

Note: This page contains sample records for the topic "js rogers sr" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Composition dependent intrinsic defect structures in SrTiO3  

SciTech Connect (OSTI)

Intrinsic point defect complexes in SrTiO3 under different chemical conditions are studied using density functional theory. The Schottky defect complex consisting of nominally charged Sr, Ti and O vacancies is predicted to be the most stable defect structure in stoichiometric SrTiO3, with a relatively low formation energy of 1.64 eV/defect. In addition, the mechanisms of defect complex formation in nonstoichiometric SrTiO3 are investigated. Excess SrO leads to the formation of the oxygen vacancies and a strontium-titanium antisite defect, while a strontium vacancy together with an oxygen vacancy and the titanium-strontium antisite defect are produced in an excess TiO2 environment. Since point defects, such as oxygen vacancies and cation antisite defects, are intimately related to the functionality of SrTiO3, these results provide guidelines for controlling the formation of intrinsic point defects and optimizing the functionality of SrTiO3 by controlling nonstoichiometric chemical compositions of SrO and TiO2 in experiments.

Liu, Bin [ORNL] [ORNL; Cooper, Valentino R [ORNL] [ORNL; Xu, Haixuan [University of Tennessee, Knoxville (UTK)] [University of Tennessee, Knoxville (UTK); Xiao, Haiyan [University of Tennessee, Knoxville (UTK)] [University of Tennessee, Knoxville (UTK); Zhang, Yanwen [ORNL] [ORNL; Weber, William J [ORNL] [ORNL

2014-01-01T23:59:59.000Z

142

Creation Date: May 7, 2013 Version: 1 Edited by: SR Client Services ITS Managed Document  

E-Print Network [OSTI]

Creation Date: May 7, 2013 Version: 1 Edited by: SR Client Services ITS Managed Document VIEW Client Services ITS Managed Document VIEW CLIENT INSTALLATION - MAC Page 2 When prompted with the End Edited by: SR Client Services ITS Managed Document VIEW CLIENT INSTALLATION - MAC Page 3 In Launchpad

Northern British Columbia, University of

143

Mg/Ca and Sr/Ca Paleothermometery from Calcareous Marine Fossils Yair Rosenthal1  

E-Print Network [OSTI]

1 Mg/Ca and Sr/Ca Paleothermometery from Calcareous Marine Fossils Yair Rosenthal1 and Braddock discusses the four important paleotemperature proxies, namely Mg/Ca in planktonic foraminifera and Sr/Ca in corals as recorders of sea surface temperatures and Mg/Ca in benthic foraminifera and ostracodes

Linsley, Braddock K.

144

Effect of doping in Bi-Pb-Sr-Ca-Cu-O superconductor composites  

E-Print Network [OSTI]

The goal of this thesis is to analyze the solid solubility limit of dopants in Bi-Pb-Sr-Ca-Cu-O superconductors. We have studied the effect of Mn doping Bi-Pb-Sr-Ca-Cu-O. The electrical resistivity and critical temperature were measured for samples...

Ertekin, Abdullah

2001-01-01T23:59:59.000Z

145

The Effects of Secondary Mineral Precipitates on 90Sr Mobility at the Hanford Site, USA  

SciTech Connect (OSTI)

The effects of secondary precipitates on 90Sr transport at the Hanford Site were investigated using quartz column experiments with simulated caustic tank waste leachates (STWL). Significantly enhanced retardation of Sr transport was observed in the column contacted with STWL due to Sr sorption and co-precipitation with neo-formed nitratecancrinite. However, the column results also suggest that neo-formed secondary precipitates could behave like native mobile colloids that can enhance Sr transport. Initially immobilized Sr within secondary precipitates could remobilize given a change in the porewater background conditions. The mobility of the neo-formed Sr-bearing precipitates increased with increased solution flow rate. In the field, porewater contents and flow rates can be changed by snowmelt (or storm water) events or artificial infiltration. The increased porewater flow rate caused by these events could affect the mobility of 90Sr-containing secondary precipitates, which can be a potential source for facilitated Sr transport in Hanford Site subsurface environments.

Um, Wooyong; Wang, Guohui; Serne, R. Jeffrey

2013-06-03T23:59:59.000Z

146

Preservation of seawater Sr and Nd isotopes in fossil sh teeth: bad news and good news  

E-Print Network [OSTI]

system, our Nd concentration data, combined with published isotopic and rare earth element data, suggest on the global seawater Sr isotope curve. For Sites 1090, 757, and 807 Sr isotopic values of the pore fluids Nd isotopic compositions from the time of deposition. Ã? 2004 Elsevier B.V. All rights reserved

Martin, Ellen

147

Superconductivity in SrNi2P2 single crystals  

SciTech Connect (OSTI)

Heat capacity, magnetic susceptibility, and resistivity of SrNi{sub 2}P{sub 2} single crystals are presented, illustrating the structural transition at 325 K, and bulk superconductivity at 1.4 K. The magnitude of {Tc}, fits to the heat capacity data, the small upper critical field H{sub c2} = 390 Oe, and {kappa} = 2.1 suggests a conventional fully gapped superconductor. With applied pressure we find that superconductivity persists into the so-called 'collapsed tetragonal' phase, although the transition temperature is monotonically suppressed with increasing pressure. This argues that reduced dimensionality can be a mechanism for increasing the transition temperatures of layered NiP, as well as layered FeAs and NiAs, superconductors.

Ronning, Filip [Los Alamos National Laboratory; Bauer, Eric D [Los Alamos National Laboratory; Park, Tuscon [Los Alamos National Laboratory; Thompson, Joe D [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

148

Electron momentum density, band structure, and structural properties of SrS  

SciTech Connect (OSTI)

The electron momentum density, the electronic band structure, and the structural properties of SrS are presented in this paper. The isotropic Compton profile, anisotropies in the directional Compton profiles, the electronic band structure and density of states are calculated using the ab initio periodic linear combination of atomic orbitals method with the CRYSTAL06 code. Structural parameters of SrS-lattice constants and bulk moduli in the B1 and B2 phases-are computed together with the transition pressure. The computed parameters are well in agreement with earlier investigations. To compare the calculated isotropic Compton profile, measurement on polycrystalline SrS is performed using 5Ci-{sup 241}Am Compton spectrometer. Additionally, charge transfer is studied by means of the Compton profiles computed from the ionic model. The nature of bonding in the isovalent SrS and SrO compounds is compared on the basis of equal-valenceelectron-density profiles and the bonding in SrS is found to be more covalent than in SrO.

Sharma, G., E-mail: gsphysics@gmail.com [University of Kota, Department of Pure and Applied Physics (India); Munjal, N.; Vyas, V. [Banasthali University, Department of Physics (India)] [Banasthali University, Department of Physics (India); Kumar, R.; Sharma, B. K. [University of Rajasthan, Department of Physics (India)] [University of Rajasthan, Department of Physics (India); Joshi, K. B. [MLS University, Department of Physics (India)] [MLS University, Department of Physics (India)

2013-10-15T23:59:59.000Z

149

Vale: Roger Charles LETHBRIDGE WE have lost Roger Charles  

E-Print Network [OSTI]

, during his halcyon days as PVC (Development) and PVC (Academic) are really about bricks and mortar, about

150

U-Sr isotopic speedometer: Fluid flow and chemical weatheringrates inaquifers  

SciTech Connect (OSTI)

Both chemical weathering rates and fluid flow are difficultto measure in natural systems. However, these parameters are critical forunderstanding the hydrochemical evolution of aquifers, predicting thefate and transport of contaminants, and for water resources/water qualityconsiderations. 87Sr/86Sr and (234U/238U) activity ratios are sensitiveindicators of water-rock interaction, and thus provide a means ofquantifying both flow and reactivity. The 87Sr/86Sr values in groundwaters are controlled by the ratio of the dissolution rate to the flowrate. Similarly, the (234U/238U) ratio of natural ground waters is abalance between the flow rate and the dissolution of solids, andalpha-recoil loss of 234U from the solids. By coupling these two isotopesystems it is possible to constrain both the long-term (ca. 100's to1000's of years) flow rate and bulk dissolution rate along the flow path.Previous estimates of the ratio of the dissolution rate to theinfiltration flux from Sr isotopes (87Sr/86Sr) are combined with a modelfor (234U/238U) to constrain the infiltration flux and dissolution ratefor a 70-m deep vadose zone core from Hanford, Washington. The coupledmodel for both (234U/238U) ratios and the 87Sr/86Sr data suggests aninfiltration flux of 5+-2 mm/yr, and bulk silicate dissolution ratesbetween 10-15.7 and 10-16.5 mol/m2/s. The process of alpha-recoilenrichment, while primarily responsible for the observed variation in(234U/238U) of natural systems, is difficult to quantify. However, therate of this process in natural systems affects the interpretation ofmost U-series data. Models for quantifying the alpha-recoil loss fractionbased on geometric predictions, surface area constraints, and chemicalmethods are also presented. The agreement between the chemical andtheoretical methods, such as direct measurement of (234U/238U) of thesmall grain size fraction and geometric calculations for that sizefraction, is quite good.

Maher, Kate; DePaolo, Donald J.; Christensen, John N.

2005-12-27T23:59:59.000Z

151

Roger Tuttle Engineering Public Relations  

E-Print Network [OSTI]

Faculty Mentor: Dr. George Kondraske Honorable Mention - Sairam Geethanath (Biomedical Engineering) Title

Chiao, Jung-Chih

152

Roger Tuttle Engineering Public Relations  

E-Print Network [OSTI]

Using General Systems Performance Theory Faculty Mentor: Dr. George Kondraske Honorable Mention - Sairam

Chiao, Jung-Chih

153

Matt Rogers | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department of EnergyDevelopment AccidentEnergy Objective:11DepartmentGrosso About

154

Front End Update Chris Rogers,  

E-Print Network [OSTI]

.42 3750 1 2 400 0.30556 4.894 3750 2 3 400 0.29393 4.17 3000 2 4 450 0.28546 5.34 2250 2 5 450 0.27859 6.36 2250 2 6 450 0.27205 4.94 2250 3 7 450 0.2658 5.61 2250 3 8 450 0.25983 6.3 2250 3 9 450 0.25413 6.97 2250 3 10 450 0.24867 7.65 2250 3 11 450 0.24344 8.31 2250 3 12 450 0.23842 9.01 2250 3 13 450 0

McDonald, Kirk

155

Faces of Science: Roger Wiens  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsing ZirconiaPolicy andExsolutionFES6FY 2011 OIG(SC) 2FY98BauerRashi Iyer

156

Faces of Science: Roger Wiens  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series toESnet4:Epitaxial ThinFOR IMMEDIATE5 BudgetNate McDowell Faces

157

Tom Rogers Director, Industrial Partnerships  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched Ferromagnetism in Layered NbS2 andThe1A:decisional. 1 B OTom D'Agostino to

158

Three-Dimensional Imaging of Individual Dopant Atoms in SrTiO3  

E-Print Network [OSTI]

for a specific 3D dopant atom configuration. The methodto have more than 2 Gd atoms in a column is still less thanImaging of Individual Dopant Atoms in SrTiO 3 Jinwoo Hwang,

Hwang, Jinwoo; Zhang, Jack Y; D’Alfonso, Adrian J; Allen, Leslie J; Stemmer, Susanne

2013-01-01T23:59:59.000Z

159

Enhanced Magnetism in Epitaxial SrRuO3 Thin Films  

E-Print Network [OSTI]

Enhanced Magnetism in Epitaxial SrRuO 3 A. J. Grutter, 1, 2and their e?ects on magnetism. In this paper we demonstrateXMCD con?rmed that the magnetism originates from the Ru 4+

Grutter, A.J.

2010-01-01T23:59:59.000Z

160

Genetic approaches to studying coronary heart disease in SR-BI/apoE double knockout mice  

E-Print Network [OSTI]

Coronary heart disease (CHD) is a major healthcare concern in both developed and developing nations. The principal cause of CHD is atherosclerosis, the buildup of fatty deposits in vessel walls. SR-BI/apoE double knockout ...

Karackattu, Sharon Liz

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "js rogers sr" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Depletion, quantum jumps, and temperature measurements of ??Sr? ions in a linear Paul Trap  

E-Print Network [OSTI]

This thesis describes the design and construction of two laser systems to probe the 674nm transition of ??Sr? ions in a linear Paul trap. The first laser system made use of a molecular transition in Iodine to stabilize the ...

Richerme, Philip J

2006-01-01T23:59:59.000Z

162

E-Print Network 3.0 - aerospike sr-71 experiment Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

: SR71. Image from Lockheed Martin. 52 12;Figure 12: Effect of a canard on the sonic boom pat- tern... shape, a new "aerospike" rocket engine, and a rugged metallic...

163

UPS STUDY OF THE ADSORPTION OF OXYGEN ON REDUCED SrTi03 SURFACES  

E-Print Network [OSTI]

Figure Captions Figure 1. UPS spectra of a reduced SrTi0 3 (Journal of Applied Physics UPS STUDY OF THE ADSORPTION OFof California. LBL 11614 UPS STUDY OF THE ADSORPTION OF

Ferrer, S.

2013-01-01T23:59:59.000Z

164

Role of polaron hopping in leakage current behavior of a SrTiO3 ...  

E-Print Network [OSTI]

Dec 10, 2013 ... zirconate titanite (PZT), strontium titanite (SrTiO3), and bar- ium titanite (BaTiO3), have been widely utilized in various electronic devices such ...

2014-03-14T23:59:59.000Z

165

{sup 89,90}Sr-determination in various environmental samples by collinear resonance ionization spectroscopy  

SciTech Connect (OSTI)

The application of Collinear Resonance Ionization Spectroscopy for the determination of {sup 89,90}Sr contaminations in various environmental samples is presented, demonstrating the versatility of this highly specialized and isotope-selective ultra-trace determination technique. Additionally to these studies we have analysed the different processes, which lead to nonselective ionization and hence cause background. Optimization of the experimental conditions resulted in a significant lowering of the detection limit to a value of 3{times}10{sup 6} atoms of {sup 90}Sr (corresponding to an activity of 2mBq) in the presence of up to 10{sup 17}atoms of stable {sup 88}Sr. In a parallel measurement trace determination of both isotopes {sup 89}Sr and {sup 90}Sr is possible with a detection limit for {sup 89}Sr of 10{sup 8}atoms. Measurements on different samples, ranging from air filter samples of 1958 up to today, soil, vegetation, milk and human urine samples as well as cooling water from nuclear power plants document the applicability and the specifications of the technique. {copyright} {ital 1997 American Institute of Physics.}

Wendt, K.; Bushaw, B.A.; Bhowmick, G. [Institut fuer Physik, Johannes Gutenberg-Universitaet, D-55099 Mainz (Germany); Bystrow, V.A.; Kotovski, N. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Kratz, J.; Lantzsch, J.; Mueller, P.; Noertershaeuser, W.; Otten, E.W. [Institut fuer Physik, Johannes Gutenberg-Universitaet, D-55099 Mainz (Germany); Seibert, A.; Trautmann, N.; Waldek, A. [Institut fuer Kernchemie, Johannes Gutenberg-Universitaet, D-55099 Mainz (Germany); Yushkevich, Y. [Joint Institute for Nuclear Research, Dubna (Russian Federation)

1997-01-01T23:59:59.000Z

166

Galactic Evolution of Sr, Y, Zr: A Multiplicity of Nucleosynthetic Processes  

E-Print Network [OSTI]

We follow the Galactic enrichment of three easily observed light n-capture elements Sr,Y,and Zr.Input stellar yields have been first separated into their respective main and weak s-process,and r-process components.The s-process yields from AGB stars are computed,exploring a wide range of efficiencies of the major neutron source,13C,and covering both disk and halo metallicities.AGBs have been shown to reproduce the main s-component in the solar system.The concurrent weak s-process,which accounts for the major fraction of the light s-process isotopes in the solar system and occurs in massive stars by the operation of the 22Ne n-source,is discussed in detail.Neither the main s-,nor the weak s-components are shown to contribute significantly to the n-capture element abundances observed in unevolved halo stars.We present a detailed analysis of a large database of spectroscopic observations of Sr,Y,Zr, Ba,and Eu for Galactic stars at various metallicities.Spectroscopic observations of Sr,Y,and Zr to Ba and Eu abundance ratios versus metallicity provide useful diagnostics of the types of n-capture processes forming Sr,Y and Zr.The observed [Sr,Y,Zr/Ba,Eu] ratio is clearly not flat at low metallicities,as we would expect if Ba,Eu and Sr,Y,Zr all had the same r-process origin.We discuss our chemical evolution predictions, taking into account the interplay between different processes to produce Sr-Y-Zr.We find hints for a primary process in low-metallicity massive stars, different from the 'classical s-process' and from the 'classical r-process',that we tentatively define LEPP (Lighter Element Primary Process).This allows us to revise the estimates of the r-process contributions to the solar Sr,Y and Zr abundances,as well as of the contribution to the s-only isotopes 86Sr,87Sr,96Mo.

Claudia Travaglio; Roberto Gallino; Enrico Arnone; John Cowan; Faith Jordan; Chris Sneden

2003-10-07T23:59:59.000Z

167

Spectroscopy of /sup 87,88,89/Sr with (n,. gamma. ) and (d,p) reactions  

SciTech Connect (OSTI)

Over the recent years the nuclear structure around the N = 50 shell closure, which is very pronounced in the strontium and zirconium isotopes, has been the subject of extensive experimental and theoretical work. On the proton side Z = 38 and Z = 40 provide fairly closed sub-shells. In the strontium isotopes the lg/sub 9/2/ neutron shell is closed at /sup 88/Sr, supplying relatively pure neutron-hole and neutron-particle states with large spectroscopic factors in /sup 87/Sr and /sup 89/Sr, as well as core-coupled states. The mass region is thus ideally suited to examine the transition from a correlated to an uncorrelated (chaotic.) excitational behavior. These two types are characterized e.g. by the density of excited states, the transition strengths, and the spectroscopic factors observed in transfer reactions. We conducted (n,..gamma..) and (d,p) reactions leading to /sup 87,88,89/Sr in addition to /sup 88/Sr(d,t)/sup 87/Sr and 24 keV neutron capture in /sup 88/Sr. The vast amounts of data were used to analyze the level densities and transition strengths in the statistical model. Correlations were found between the selective population of states dominating the (d,p) process, and the statistical decay of the compound state formed after thermal neutron capture. In the course of the analyses we established essentially complete level schemes (within limited spin windows centered around the spin of the capture state) up to around half the neutron binding energy. The E1 partial decay widths were found to agree with results of giant resonance calculations. We intend to give an overview of the experiments and outline the results of the model calculations. 24 refs., 4 figs.

Winter, C.; Krusche, B.; Lieb, K.P.; Hlawatsch, G.; Egidy, T.V.; Hoyler, F.; Casten, R.F.

1988-01-01T23:59:59.000Z

168

X-ray nano-diffraction study of Sr intermetallic phase during solidification of Al-Si hypoeutectic alloy  

SciTech Connect (OSTI)

The evolution of strontium (Sr) containing intermetallic phase in the eutectic reaction of Sr-modified Al-Si hypoeutectic alloy was studied with high energy synchrotron beam source for nano-diffraction experiments and x-ray fluorescence elemental mapping. Contrary to popular belief, Sr does not seem to interfere with the Twin Plane Re-entrant Edge (TPRE) growth mechanism of eutectic Si, but evolves as the Al{sub 2}Si{sub 2}Sr phase during the eutectic reaction at the boundary between the eutectic Si and Al grains.

Manickaraj, Jeyakumar; Gorny, Anton; Shankar, Sumanth, E-mail: shankar@mcmaster.ca [Light Metal Casting Research Centre (LMCRC), Department of Mechanical Engineering, McMaster University, 1280 Main Street W, Hamilton, Ontario L8S 4L7 (Canada); Cai, Zhonghou [Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 (United States)

2014-02-17T23:59:59.000Z

169

Aspects of the SrO-CuO-TiO2 Ternary System Related to the Deposition of SrTiO3 and Copper-Doped SrTiO3 Thin-Film Buffer Layers  

SciTech Connect (OSTI)

YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} (YBCO) coated conductors are promising materials for large-scale superconductivity applications. One version of a YBCO coated conductor is based on ion beam assisted deposition (IBAD) of magnesium oxide (MgO) onto polycrystalline metal substrates. SrTiO{sub 3} (STO) is often deposited by physical vapor deposition (PVD) methods as a buffer layer between the YBCO and IBAD MgO due to its chemical stability and lattice mismatch of only {approx}1.5% with YBCO. In this work, some aspects of the stability of STO with respect to copper (Cu) and chemical solution deposition of STO on IBAD MgO templates were examined. Solubility limits of Cu in STO were established by processing Cu-doped STO powders by conventional bulk preparation techniques. The maximum solubility of Cu in STO was {approx}1% as determined by transmission electron microscopy (TEM) and Rietveld refinements of x-ray diffraction (XRD) data. XRD analysis, performed in collaboration with NIST, on powder compositions on the STO/SrCuO{sub 2} tie line did not identify any ternary phases. SrCu{sub 0.10}Ti{sub 0.90}O{sub y} buffer layers were prepared by pulsed laser deposition (PLD) and CSD on IBAD MgO flexible metallic textured tapes. TEM analysis of a {approx}100 nm thick SrCu{sub 0.10}Ti{sub 0.90}O{sub y} buffer layer deposited by PLD showed a smooth Cu-doped STO/MgO interface. A {approx}600 nm thick YBCO film, deposited onto the SrCu{sub 0.10}Ti{sub 0.90}O{sub y} buffer by PLD, exhibited a T{sub c} of 87 K and critical current density (J{sub c}) of {approx}1 MA/cm{sup 2}. STO and Cu-doped STO thin films by CSD were {approx}30 nm thick. The in plane alignment (FWHM) after deposition of the STO improved by {approx}1{sup o} while it degraded by {approx}2{sup o} with the SrCu{sub 0.05}TiO{sub y} buffer. YBCO was deposited by PLD on the STO and SrCu{sub 0.05}TiO{sub y} buffers. The in plane alignment (FWHM) of the YBCO with the STO buffer layer slightly improved while that of the YBCO with the SrCu{sub 0.05}TiO{sub y} buffer layer remained constant. A goal of the CSD approach to fabrication of coated conductors is process simplicity. In this study, single layer textured films were obtained without a nucleating seed layer that has been deemed necessary by several investigators. These results indicate that Cu-doped STO buffer layers deposited by PLD or CSD are compatible with IBAD MgO and YBCO and that CSD is a viable approach to coated conductor fabrication.

A. Ayala

2004-12-20T23:59:59.000Z

170

Electric dipole and quadrupole properties of In$^{+}$ and Sr using finite field calculation  

E-Print Network [OSTI]

The electric dipole and quadrupole properties of two frequency-standard candidates In$^{+}$ and Sr are calculated by using the finite-field approach. We reproduce the dipole polarizability of the 5s$^2$ $^1S^e_0$ and 5s5p $^3P^o_0$ of In$^+$ and Sr with an excellent agreement with the previously recommended data. Besides, the scalar and tensor dipole polarizabilities for $5s5p$ $^3P^o_{1,2}$ of In$^+$ and Sr and the second dipole hyperpolarizability for In$^+$ 5s$^2$ $^1S^e_0$ and 5s5p $^3P^o_{0,1,2}$ are given. The uncertainty is controlled down to around 1-4\\% for In$^+$ and 2-6\\% for Sr by increasing the basis-set and electronic-correlation levels hierarchically. The importance of the spin-orbit coupling effect is analyzed by comparing the spin-dependent and spin-free results. The dipole polarizability of In$^{+}$ demonstrates stronger dependency on the spin-orbit coupling effect than Sr. The quadrupole moment and quadrupole polarizabilities of 5s$^2$ $^1S^e_0$ and 5s5p $^3P^o_{0,1,2}$ are also given. Fina...

Yu, Yan-mei; Feng, Hui-hui; Fan, Heng; Liu, Wu-Ming

2015-01-01T23:59:59.000Z

171

Highly conducting SrMoO{sub 3} thin films for microwave applications  

SciTech Connect (OSTI)

We have measured the microwave resistance of highly conducting perovskite oxide SrMoO{sub 3} thin film coplanar waveguides. The epitaxial SrMoO{sub 3} thin films were grown by pulsed laser deposition and showed low mosaicity and smooth surfaces with a root mean square roughness below 0.3?nm. Layer-by-layer growth could be achieved for film thicknesses up to 400?nm as monitored by reflection high-energy electron diffraction and confirmed by X-ray diffraction. We obtained a constant microwave resistivity of 29???·cm between 0.1 and 20?GHz by refining the frequency dependence of the transmission coefficients. Our result shows that SrMoO{sub 3} is a viable candidate as a highly conducting electrode material for all-oxide microwave electronic devices.

Radetinac, Aldin, E-mail: aldin@oxide.tu-darmstadt.de; Mani, Arzhang; Ziegler, Jürgen; Alff, Lambert; Komissinskiy, Philipp, E-mail: komissinskiy@oxide.tu-darmstadt.de [Institute of Materials Science, TU Darmstadt, Alarich-Weiss-Str. 2, 64287 Darmstadt (Germany); Melnyk, Sergiy; Nikfalazar, Mohammad; Zheng, Yuliang; Jakoby, Rolf [Institute for Microwave Engineering and Photonics, TU Darmstadt, Merckstraße 25, 64283 Darmstadt (Germany)

2014-09-15T23:59:59.000Z

172

EXPLAINING THE Sr AND Ba SCATTER IN EXTREMELY METAL-POOR STARS  

SciTech Connect (OSTI)

Compilations of abundances of strontium and barium in extremely metal-poor stars show that an apparent cutoff is observed for [Sr/Ba] at [Fe/H] < -3.6 and large fluctuations for [Fe/H] > -3.6 with a clear upper bound depending on metallicity. We study the factors that place upper limits on the logarithmic ratio [Sr/Ba]. A model is developed in which the collapses of type II supernovae are found to reproduce many of the features seen in the data. This model is consistent with galactic chemical evolution constraints of light-element enrichment in metal-poor stars. Effects of turbulence in an explosive site have also been simulated, and are found to be important in explaining the large scatter observed in the [Sr/Ba] data.

Aoki, W.; Suda, T.; Boyd, R. N.; Kajino, T.; Famiano, M. A., E-mail: aoki.wako@nao.ac.jp, E-mail: takuma.suda@nao.ac.jp, E-mail: richard11boyde@comcast.net, E-mail: kajino@nao.ac.jp, E-mail: michael.famiano@wmich.edu [National Astronomical Observatory of Japan, 2-21-1 Mitaka, Tokyo 181-8588 (Japan)

2013-03-20T23:59:59.000Z

173

Time Resolved in Situ XAFS Study of the Electrochemical Oxygen Intercalation in SrFeO2.5 Brownmillerite Structure: Comparison with the Homologous SrCoO2.5 System  

E-Print Network [OSTI]

temperature oxygen ionic conductors are key materials for the development of the next generation solid oxideTime Resolved in Situ XAFS Study of the Electrochemical Oxygen Intercalation in SrFeO2 to reversibly intercalate oxygen in an electrochemical reaction at room temperature to reach SrMO3 stoichiometry

Frenkel, Anatoly

174

Synthesis of highly phase pure (Bi, Pb)-Sr-Ca-Cu-O superconductor  

DOE Patents [OSTI]

An article and method of manufacture of (Bi,Pb)-Sr-Ca-Cu-O superconductor are disclosed. The superconductor is manufactured by preparing a first powdered mixture of bismuth oxide, lead oxide, strontium carbonate, calcium carbonate and copper oxide. A second powdered mixture is then prepared of strontium carbonate, calcium carbonate and copper oxide. The mixtures are calcined separately with the two mixtures then combined. The resulting combined mixture is then subjected to a powder in tube deformation and thermal processing to produce a substantially phase pure (Bi,Pb)-Sr-Ca-Cu-O superconductor. 5 figs.

Dorris, S.E.; Poeppel, R.B.; Prorok, B.C.; Lanagan, M.T.; Maroni, V.A.

1994-10-11T23:59:59.000Z

175

Synthesis of highly phase pure (Bi, Pb)-Sr-Ca-Cu-O superconductor  

DOE Patents [OSTI]

An article and method of manufacture of (Bi,Pb)-Sr-Ca-Cu-O superconductor. The superconductor is manufactured by preparing a first powdered mixture of bismuth oxide, lead oxide, strontium carbonate, calcium carbonate and copper oxide. A second powdered mixture is then prepared of strontium carbonate, calcium carbonate and copper oxide. The mixtures are calcined separately with the two mixtures then combined. The resulting combined mixture is then subjected to a powder in tube deformation and thermal processing to produce a substantially phase pure (Bi,Pb)-Sr-Ca-Cu-O superconductor.

Dorris, Stephen E. (La Grange Park, IL); Poeppel, Roger B. (Glen Ellyn, IL); Prorok, Barton C. (Harrisville, PA); Lanagan, Michael T. (Woodridge, IL); Maroni, Victor A. (Naperville, IL)

1994-01-01T23:59:59.000Z

176

Degradation Mechanisms of La-Sr-Co-Fe-O3 SOFC Cathodes  

SciTech Connect (OSTI)

The long-term stability of anode-supported YSZ electrolyte SOFCs utilizing (La0.6Sr0.4)0.98Co0.2Fe0.8O3-? (LSCF-6428) cathodes was assessed. Samples tested for 500 hours at 750 C and 0.7V indicated ?50% degradation. While scanning electron microscopy (SEM) and energy dispersive x-ray (EDX) analysis indicated no obvious microstructural or chemical phenomena that could explain the high degradation, x-ray photon spectroscopy (XPS) revealed that enrichment of Sr at the cathode-electrolyte and cathode-current collector interfaces was at least partially responsible for the observed degradation.

Simner, Steve P.; Anderson, Michael D.; Engelhard, Mark H.; Stevenson, Jeffry W.

2006-08-17T23:59:59.000Z

177

Sr{sup 89} -- An unnecessary contaminant of concern in SRS environmental samples  

SciTech Connect (OSTI)

This report documents the technical and time bases used to conclude that the fission product, Sr{sup 89}, should no longer be considered as a contaminant of concern and an analyte in SRS environmental samples. This conclusion is the basis for hard-dollar cost savings suggestions to eliminate its analysis in F/H Areas Seepage Basin monitoring wells and in future soil, sediment and water environmental samples for which the analytical contract is to be awarded prior to October 1, 1993. Environmental Restoration should proactively pursue regulatory approval for the elimination of Sr{sup 89} as an analyte in appropriate environmental samples.

Holcomb, H.P.

1993-07-28T23:59:59.000Z

178

Hysteresis analysis of CoTi substituted M-type BaSr hexagonal ferrite Charanjeet Singh a,  

E-Print Network [OSTI]

Hysteresis analysis of Co­Ti substituted M-type Ba­Sr hexagonal ferrite Charanjeet Singh a, , S.5Sr0.5CoxTixFe(12 - 2x)O19 ferrite have been investigated by XRD, SEM and VSM. XRD and SEM confirm M ferrites are known for their strong uniaxial magne- tocrystalline anisotropy with ease of magnetization

Koledintseva, Marina Y.

179

NOx uptake on alkaline earth oxides (BaO, MgO, CaO and SrO) supported...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

uptake on alkaline earth oxides (BaO, MgO, CaO and SrO) supported on ?-Al2O3. NOx uptake on alkaline earth oxides (BaO, MgO, CaO and SrO) supported on ?-Al2O3....

180

Tunable synthesis of TiO{sub 2}/SrO core/shell nanowire arrays with enhanced photocatalytic activity  

SciTech Connect (OSTI)

Graphical abstract: TiO{sub 2} nanowires with tunable SrO shell layer are easily fabricated. The core/shell structure can enhance the photocatalytic activity of TiO{sub 2} nanowires and restrict the recombination of the electrons/holes. Display Omitted Highlights: ? A facile method to fabricate TiO{sub 2}/SrO core-shell nanowire array is reported. ? The thickness of SrO shell layer can be tunable by adjusting the dipping time. ? TiO{sub 2}/SrO core/shell nanowires shows enhanced photocatalytic activity. -- Abstract: We report a simple method to fabricate well-aligned TiO{sub 2}/SrO core/shell nanowire arrays. The core/shell structure is confirmed to have crystalline TiO{sub 2} nanowires core and amorphous SrO shell layer. The shell is composed of SrO with tunable thickness. Photocatalytic activity measurement shows that TiO{sub 2}/SrO core/shell nanowire arrays outperform uncovered TiO{sub 2} nanowires. Such core/shell nanowire arrays have potential applications for photovoltaic devices and as high performance photocatalyst.

Wang, Wenqi [Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074 (China)] [Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074 (China); Yang, Jie, E-mail: flyyangj@163.com [Faculty of Mechanical and Electronic Information, China University of Geosciences, Wuhan 430074 (China)] [Faculty of Mechanical and Electronic Information, China University of Geosciences, Wuhan 430074 (China); Gong, Yingpeng, E-mail: ypgong@jhust.edu.cn [School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074 (China)] [School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074 (China); Hong, Hanlie [Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074 (China)] [Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074 (China)

2013-01-15T23:59:59.000Z

Note: This page contains sample records for the topic "js rogers sr" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Stoichiometric, nonstoichiometric, and locally nonstoichiometric SrTiO{sub 3} films grown by molecular beam epitaxy  

SciTech Connect (OSTI)

SrTiO{sub 3} films were grown by reactive molecular beam epitaxy to have varying degrees of both global and local cationic nonstoichiometries (with stoichiometry defined as a 1:1 ratio of Sr:Ti). Slight global excesses of Sr and Ti resulted in two-fold reconstructions in the reflection high-energy electron diffraction patterns along the [110] and [100] azimuths, respectively. Larger global nonstoichiometries (2:1 and 1:2 ratios) were also accommodated into the film's crystalline structure and affected the long-range crystalline order as observed in the x-ray diffraction patterns, both of which were related to the parent perovskite pattern. Local nonstoichiometries were introduced by depositing multiple monolayers (MLs) (from 2 to 33) of SrO and TiO{sub 2} in an alternating fashion, while maintaining the global SrTiO{sub 3} stoichiometry. These layered structures of SrO and TiO{sub 2} blocks inter-reacted during growth to form highly crystalline epitaxial SrTiO{sub 3}. Films grown in this manner with blocks thicker than 8 MLs were fully relaxed and, when the block thicknesses ranged between 8 and 10 MLs, the full widths at half maxima of 2{theta} peaks were narrower than the standard SrTiO{sub 3} films having blocks 1 ML thick.

Fisher, P.; Du, H.; Skowronski, M.; Salvador, P. A. [Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States); Maksimov, O. [Electro-Optics Center, Pennsylvania State University, Freeport, Pennsylvania 16229 (United States); Weng, X. [Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802 (United States)

2008-01-01T23:59:59.000Z

182

FATE AND TRANSPORT OF RADIONUCLIDES [U(VI), Sr, Cs] IN VADOSE ZONE SEDIMENTS AT THE HANFORD SITE  

E-Print Network [OSTI]

FATE AND TRANSPORT OF RADIONUCLIDES [U(VI), Sr, Cs] IN VADOSE ZONE SEDIMENTS AT THE HANFORD SITE AND TRANSPORT OF RADIONUCLIDES [U(VI), Sr, Cs] IN VADOSE ZONE SEDIMENTS AT THE HANFORD SITE Abstract by Kenton A that influence radionuclide fate and transport in the Hanford vadose zone. Hanford was established for nuclear

Flury, Markus

183

Tuning the electronic structure of SrTiO{sub 3}/SrFeO{sub 3?x} superlattices via composition and vacancy control  

SciTech Connect (OSTI)

Using density functional theory-based calculations, we explore the effects of oxygen vacancies and epitaxial layering on the atomic, magnetic, and electronic structure of (SrTiO{sub 3}){sub n}(SrFeO{sub 3?x}){sub 1} superlattices. While structures without oxygen vacancies (x = 0) possess small or non-existent band gaps and ferromagnetic ordering in their iron layers, those with large vacancy concentrations (x = 0.5) have much larger gaps and antiferromagnetic ordering. Though the computed gaps depend numerically on the delicate energetic balance of vacancy ordering and on the value of Hubbard U{sub eff} used in the calculations, we demonstrate that changes in layering can tune the band gaps of these superlattices below that of SrTiO{sub 3} (3.2 eV) by raising their valence band maxima. This suggests the possibility that these superlattices could absorb in the solar spectrum, and could serve as water-splitting photocatalysts.

Berger, Robert F. [Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Department of Chemistry, Western Washington University, Bellingham, Washington 98225 (United States); Broberg, Daniel P. [Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Neaton, Jeffrey B. [Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Department of Physics, University of California, Berkeley, California 94720, USA and Kavli Institute for Energy Nanosciences, Berkeley, California 94720 (United States)

2014-04-01T23:59:59.000Z

184

Comparison of the EXAFS Spectra of Heteronuclear MnCa/Sr Model Complexes to the Oxygen-Evolving Mn(4)Ca Complex of Photosystem II  

SciTech Connect (OSTI)

Heterometallic Mn-Ca and Mn-Sr complexes have been prepared and employed as model complexes for Ca and Sr EXAFS spectral comparisons with the Oxygen-Evolving Complex (OEC) of Photosystem II (PS II); these have revealed similarities that support the presence of at least one O atom bridge between the Mn and Ca/Sr in the OEC.

Mishra, A.; Yano, J.; Pushkar, Y.; Abboud, K.A.; Yachandra, V.K.; Christou, G.

2009-06-03T23:59:59.000Z

185

Cenozoic pelagic Sr//Ca records: Exploring a link to paleoproductivity College of Marine Sciences, University of Delaware, Lewes, Delaware, USA  

E-Print Network [OSTI]

Cenozoic pelagic Sr//Ca records: Exploring a link to paleoproductivity K. Billups College of Marine May 2004; accepted 24 May 2004; published 20 July 2004. [1] Recent studies have revealed that Sr/Ca ratios of coccolithophores may be affected by productivity. Here we compile published Sr/Ca data from

Schrag, Daniel

186

Preparation of Bi-Sr-Ca-Cu-O superconductors from oxide-glass precursors  

DOE Patents [OSTI]

A superconductor and precursor therefor from oxide mixtures of Ca, Sr, Bi and Cu. Glass precursors quenched to elevated temperatures result in glass free of crystalline precipitates having enhanced mechanical properties. Superconductors are formed from the glass precursors by heating in the presence of oxygen to a temperature below the melting point of the glass.

Hinks, David G. (Lemont, IL); Capone, II, Donald W. (Northbridge, MA)

1992-01-01T23:59:59.000Z

187

Band-engineered SrTiO{sub 3} nanowires for visible light photocatalysis  

SciTech Connect (OSTI)

We have theoretically investigated the structural, electronic, and optical properties of perovskite SrTiO{sub 3} nanowires for use in visible light photocatalytic applications using pseudopotential density-functional theory calculations. The electronic structure calculations show that the band gap is modified in the SrTiO{sub 3} nanowires compared with that of the bulk. For TiO{sub 2}-terminated nanowires, the mid-band states induced by the combination of oxygen and strontium atoms on the surface lead to a shift in the valence band toward the conduction band without interference from the edge of the conduction band, which reduces the band gap. On the contrary, the electronic states induced by the combination of oxygen and strontium atoms on the surface of SrO-terminated nanowires lead to a shift in the conduction band toward the valence band. The calculated optical results indicate that the absorption edge of the nanowires shift towards the red-light region. These theoretical results suggest that perovskite SrTiO{sub 3} nanowires are promising candidates for use in visible light photocatalytic processes such as solar-assisted water splitting reactions.

Fu, Q.; He, T.; Li, J. L.; Yang, G. W. [State Key Laboratory of Optoelectronic Materials and Technologies, Institute of Optoelectronic and Functional Composite Materials, Nanotechnology Research Center, School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, Guangdong (China)

2012-11-15T23:59:59.000Z

188

Crystallography of Interfaces and Grain Size Distributions in Sr-Doped LaMnO3  

E-Print Network [OSTI]

Crystallography of Interfaces and Grain Size Distributions in Sr-Doped LaMnO3 Qinyuan Liu,§ Sudip systems are similar. I. Introduction HIGH-TEMPERATURE solid oxide fuel cells (SOFCs) offer highly efficient, clean, direct conversion of chemical to electrical energy.1 SOFC performance is dictated

Rohrer, Gregory S.

189

Haskins Laboratories Status Report on Speech Research 1992, SR-111 /112,111-120  

E-Print Network [OSTI]

enhancement: alteration of auditory feedback and modification of speech production. INTRODUCTION The finding to fluency enhancement only because it alters the speech production characteristics of stutterers. WingateHaskins Laboratories Status Report on Speech Research 1992, SR-111 /112,111-120 Effects

190

Frequency Ratio of ${}^{199}$Hg and ${}^{87}$Sr Optical Lattice Clocks beyond the SI Limit  

E-Print Network [OSTI]

We report on a frequency ratio measurement of a ${}^{199}$Hg-based optical lattice clock referencing a ${}^{87}$Sr-based clock. Evaluations of lattice light shift, including atomic-motion-dependent shift, enable us to achieve a total systematic uncertainty of $7.2 \\times 10^{-17}$ for the Hg clock. The frequency ratio is measured to be $\

Yamanaka, Kazuhiro; Ushijima, Ichiro; Takamoto, Masao; Katori, Hidetoshi

2015-01-01T23:59:59.000Z

191

Ca and 87/86 Sr isotopes as tracers of silicate weathering in small  

E-Print Network [OSTI]

44/40 Ca and 87/86 Sr isotopes as tracers of silicate weathering in small catchments of the Massif, Laboratory Division, Orléans, France 2 U.S. Geological Survey, Water Resources Division, Menlo Park, CA 94025).Measurements of 44/40 Ca isotope ratios (44/40 Ca measured by the double spike method on TIMS and normalized

Paris-Sud XI, Université de

192

Neutron cross sections of the isomeric nuclei KPrn, Sr81m,and Nbgam  

E-Print Network [OSTI]

Neutron cross sections of the isomeric nuclei KPrn, Sr81m,and Nbgam NJ. V. Petrov and A. I. Fiz. 23, 1186-1189 (June 1976) Inelastic neutron acceleration and retardation cross sections is on the order of tenths of a barn. For the Srs7mnucleus the mean energy given to a neutron in a single collision

Shlyakhter, Ilya

193

November 1998 NREL/SR-500-24379 Fatigue of Composite Material Beam  

E-Print Network [OSTI]

No. DE-AC36-83CH10093 #12;Fatigue of Composite Material Beam Elements Representative of Wind TurbineNovember 1998 · NREL/SR-500-24379 Fatigue of Composite Material Beam Elements Representative of Wind Turbine Blade Substructure John F. Mandell, Daniel D. Samborsky, David W. Combs, M. Ethan Scott

194

Synthesis and Structure Determination of Ferromagnetic Semiconductors LaAMnSnO6 (A = Sr Ba)  

SciTech Connect (OSTI)

LaAMnSnO{sub 6} (A = Sr, Ba) have been synthesized by high temperature solid-state reactions under dynamic 1% H{sub 2}/Ar flow. Rietveld refinements on room temperature powder X-ray diffraction data indicate that LaSrMnSnO{sub 6} crystallizes in the GdFeO{sub 3}-structure, with space group Pnma and, combined with transmission electron microscopy, LaBaMnSnO{sub 6} in Imma. Both space groups are common in disordered double-perovskites. The Mn{sup 3+} and Sn{sup 4+} ions whose valence states were confirmed by X-ray absorption spectroscopy, are completely disordered over the B-sites and the BO{sub 6} octahedra are slightly distorted. LaAMnSnO{sub 6} are ferromagnetic semiconductors with a T{sub C} = 83 K for the Sr- and 66 K for the Ba-compound. The title compounds, together with the previously reported LaCaMnSnO{sub 6} provide an interesting example of progression from Pnma to Imma as the tolerance factor increases. An analysis of the relationship between space group and tolerance factor for the series LaAMnMO{sub 6} (A = Ca, Sr, Ba; M = Sn, Ru) provides a better understanding of the symmetry determination for double perovskites.

T Yang; T Perkisas; J Hadermann; M Croft; A Ignatov; M Greenblatt

2011-12-31T23:59:59.000Z

195

An Injectable Apatite Permeable Reactive Barrier for In Situ 90Sr Immobilization  

SciTech Connect (OSTI)

An injectable permeable reactive barrier (PRB) technology was developed to sequester 90Sr in groundwater through the in situ formation of calcium-phosphate mineral phases, specifically apatite that incorporates 90Sr into the chemical structure. An integrated, multi-scale development and testing approach was used that included laboratory bench-scale experiments, an initial pilot-scale field test, and the emplacement and evaluation of a 300-ft-long treatability-test-scale PRB. Standard groundwater wells were used for emplacement of the treatment zone, allowing treatment of contaminants too deep below ground surface for trench-and-fill type PRB technologies. The apatite amendment formulation uses two separate precursor solutions, one containing a Ca-citrate complex and the other a Na-phosphate solution, to form apatite precipitate in situ. Citrate is needed to keep calcium in solution long enough to achieve a more uniform and areally extensive distribution of precipitate formation. In the summer of 2008, the apatite PRB technology was applied as a 91-m (300-ft) -long permeable reactive barrier on the downgradient edge of a 90Sr plume beneath the Hanford Site in Washington State. The technology was deployed to reduce 90Sr flux discharging to the Columbia River. Performance assessment monitoring data collected to date indicate the barrier is meeting performance objectives. The average reduction in 90Sr concentrations at four downgradient compliance monitoring locations was 95% relative to the high end of the baseline range approximately 1 year after treatment, and continues to meet remedial objectives more than 4 years after treatment.

Vermeul, Vincent R.; Szecsody, James E.; Fritz, Brad G.; Williams, Mark D.; Moore, Robert C.; Fruchter, Jonathan S.

2014-04-16T23:59:59.000Z

196

Development of high through-put Sr isotope analysis for monitoring reservoir integrity for CO{sub 2} storage.  

SciTech Connect (OSTI)

Recent innovations in multi-collector ICP-mass spectrometry (MC-ICP-MS) have allowed for rapid and precise measurements of isotope ratios in geological samples. Naturally occurring Sr isotopes has the potential for use in Monitoring, Verification, and Accounting (MVA) associated with geologic CO2 storage. Sr isotopes can be useful for: Sensitive tracking of brine migration; Determining seal rock leakage; Studying fluid/rock reactions. We have optimized separation chemistry procedures that will allow operators to prepare samples for Sr isotope analysis off site using rapid, low cost methods.

Wall, Andy; Jain, Jinesh; Stewart, Brian; Capo, Rosemary; Hakala, Alexandra J.; Hammack, Richard; Guthrie, George

2012-01-01T23:59:59.000Z

197

Processing & properties La{sub 1-x}A{sub x}Co{sub 1-y}Fe{sub y}O{sub 3}(A = Sr, Ca) perovskites  

SciTech Connect (OSTI)

Selected compositions within the system La{sub 1-x}A{sub x}Co{sub 1-y}Fe{sub y}O{sub 3-{delta}}(A = Sr, Ca) were prepared by combustion synthesis and characterized by XRD, TGA, electrical conductivity, and oxygen permeation measurements. Substantial weight loss (due to loss of lattice oxygen) was observed in some compositions at high temperatures. For Sr containing materials, this weight loss increased with increasing Sr content. A substantial decrease in electronic conductivity was observed at high temperatures in Sr doped materials; this decrease was related to the decreased oxygen stoichiometry at these temperatures. In Sr doped compositions, oxygen flux increased with increasing Sr content. Calculated values of ionic conductivity were greater than the conductivity of yttria stabilized zirconia. Substitution of Ca for Sr resulted in substantially lower fluxes.

Stevenson, J.W.; Armstrong, T.R.; Pederson, L.R. [and others

1995-04-01T23:59:59.000Z

198

The elastic and piezoelectric properties of tungsten bronze ferroelectric crystals ,,Sr0.7Ba0.3...2NaNb5O15 and ,,Sr0.3Ba0.7...2NaNb5O15  

E-Print Network [OSTI]

The elastic and piezoelectric properties of tungsten bronze ferroelectric crystals ,,Sr0.7Ba0 and piezoelectric constants of tungsten bronze ferroelectric crystals Sr0.7Ba0.3 2NaNb5O15 SBNN70 and Sr0.3Ba0.7 2Na. INTRODUCTION Ferroelectric crystals with tungsten bronze structure are another attractive family beside

Cao, Wenwu

199

The use of strontium-to-calcium (Sr/Ca) ratios in otoliths is becoming a standard  

E-Print Network [OSTI]

712 The use of strontium-to-calcium (Sr/Ca) ratios in otoliths is becoming a standard method conditions in wavelength dispersive electron microprobe analysis on the measurement of strontium

Kurapov, Alexander

200

Band Offsets at the Epitaxial Anatase TiO2/n-SrTiO3(001) Interface...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

to measure valence band offsets at the epitaxial anatase TiO2(002)n-SrTiO3(001) heterojunction prepared by molecular beam epitaxy, Within experimental error, the valance band...

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201

Photoconductivity and Non-Exponential Relaxation at Insulating LaAlO3/SrTiO3 Interfaces  

SciTech Connect (OSTI)

LaAlO{sub 3} is grown on SrO terminated (100) SrTiO{sub 3}, and (110) SrTiO{sub 3}, producing insulating heterointerfaces without light. Photocurrent spectroscopy at low temperatures reveals a broad distribution of interface states between 2 eV and 2.7 eV at both interfaces, with a higher density in the (110) case concomitant with relatively shallow traps. The photocurrent relaxation can be well fitted by a stretched exponential form, confirming energetically distributed electron traps. Photo-carrier lifetimes are larger than a few hundred seconds for optical excitation approaching the SrTiO{sub 3} band-gap energy, providing the opportunity to study transient light-induced properties at low temperatures.

Kim, Minu; Bell, C.; Hikita, Y.; Kozuka, Y.; Kim, B.G.; Hwang, H.Y.

2012-08-17T23:59:59.000Z

202

Campus sERVICEs-sr assoc Vice pres 200 University Hall, PO Box 210046, Cincinnati OH 45221  

E-Print Network [OSTI]

, CS Operations 61267 cell 703-0391 SCHLEMBACH, Mark Sr Financial Administrator 61241 aRamaRK/DINING s, OH 45221-0017 FAX 60601 CRCMemberServicesDesk 60604 HESTER, Brandi Coordinator, Fitness & Wellness

Papautsky, Ian

203

Disproof of solar influence on the decay rates of 90Sr/90Y  

E-Print Network [OSTI]

A custom-built liquid scintillation counter was used for long-term measurements of 90Sr/90Y sources. The detector system is equipped with an automated sample changer and three photomultiplier tubes, which makes the application of the triple-to-double coincidence ratio (TDCR) method possible. After decay correction, the measured decay rates were found to be stable and no annual oscillation could be observed. Thus, the findings of this work are in strong contradiction to those of Parkhomov [1] who reported on annual oscillations when measuring 90Sr/90Y with a Geiger-M\\"uller counter. Sturrock et al. [2] carried out a more detailed analysis of the experimental data from Parkhomov and claimed to have found correlations between the decay rates and processes inside the Sun. These findings are questionable, since they are based on inappropriate experimental data as is demonstrated in this work. A frequency analysis of our activity data does not show any significant periodicity.

Karsten Kossert; Ole Nähle

2014-07-09T23:59:59.000Z

204

La(Sr)FeO3 SOFC Cathodes with Marginal Copper Doping  

SciTech Connect (OSTI)

Abstract (La0.8Sr0.2)0.98Fe0.98Cu0.02O3-? can be sintered directly onto YSZ (without the need for a protective ceria interlayer to prevent inter-diffusion). Though subject to an extended “burn-in” period (~200 hours), anode-supported YSZ cells utilizing the Cu-doped LSF achieve power densities ranging from 1.3-1.7 W/cm2 at 750ºC and 0.7V. These cells have also demonstrated 500 hours of stable performance. The results are somewhat surprising given that XRD indicates an interaction between (La0.8Sr0.2)0.98Fe0.98Cu0.02O3-? and YSZ resulting in the formation of strontium zirconate and/or monoclinic zirconia. The amount and type of reaction product was found to be dependent on cathode and electrolyte powder pre-calcination temperatures.

Simner, Steve P.; Anderson, Michael D.; Stevenson, Jeffry W.

2004-08-01T23:59:59.000Z

205

Defects and persistent conductivity in SrTiO{sub 3}  

SciTech Connect (OSTI)

Strontium titanate (SrTiO{sub 3}) is often used as a substrate for oxide thin films such as high-temperature superconductors. It has the perovskite structure and an indirect band gap of 3.25 eV. Our prior work showed that hydrogen impurities form a defect complex that contains two hydrogen atoms. The complex was tentatively attributed to a passivated strontium vacancy. Alternatively, it could be a partially passivated titanium vacancy. In order to create titanium vacancies, we annealed samples in an evacuated ampoule with SrO powder. These samples show unexpected behavior. After illuminating with sub-gap light, the free-electron concentration increases significantly. After the light is turned off, the high conductivity persists at room temperature. We attribute persistent photoconductivity (PPC) to the excitation of an electron from a vacancy into the conduction band, with a low recapture rate.

McCluskey, Matthew D.; Tarun, Marianne C. [Department of Physics and Astronomy, Washington State University, Pullman, WA 99164-2814 (United States)

2014-02-21T23:59:59.000Z

206

Oxygen vacancies at the surface of SrTiO{sub 3} thin films  

SciTech Connect (OSTI)

The two-dimensional electron gas (2DEG) observed at the surface of oxide thin films and at the interface between two oxides has been widely discussed, but the mechanism responsible for this behavior is still not well understood. In this work, we study the properties of the SrTiO{sub 3} (001) surface and show that defects are necessary in order to explain this 2DEG. We study the properties of oxygen vacancies at the TiO{sub 2} and SrO terminated surface, and conclude they can explain the metallic behavior experimentally observed. There is a strong tendency for these vacancies to be localized at the surface, where the formation energy is less than 2.92?eV.

Silva, Alexandre R., E-mail: alexandre.silva@univasf.edu.br [Colegiado de Engenharia Mecânica, Universidade Federal do Vale do São Francisco, 48902-300 Juazeiro, BA (Brazil); Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, 09210-580 Santo André, SP (Brazil); Dalpian, Gustavo M., E-mail: gustavo.dalpian@ufabc.edu.br [Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, 09210-580 Santo André, SP (Brazil)

2014-01-21T23:59:59.000Z

207

LaSrVO4: a candidate for the spin-orbital liquid state  

SciTech Connect (OSTI)

A layered perovskite LaSrVO4 was studied by neutron diraction, pair distribution function measurement using synchrotron x-ray, susceptibility and specific heat measurements, and first-principles calculation. The results show (i) a weak structural distortion around 100 K with the existence of orbital fluctuations both above and below it; (ii) the absence of the long range magnetic ordering down to 0.35 K but the appearance of a short range magnetic ordering around 11 K with a T2 behavior of the specic heat below it. Meanwhile, the calculation based on the density functional theory predicts a magnetic ordered ground state. All facts indicate a melting of the magnetic ordering due to the orbital fluctuations in LaSrVO4, which makes it a rare candidate for the spin-orbital liquid state related to t2g orbitals.

Dun, Z. L. [University of Tennessee, Knoxville (UTK)] [University of Tennessee, Knoxville (UTK); Garlea, Vasile O [ORNL] [ORNL; Ren, Y. [Argonne National Laboratory (ANL)] [Argonne National Laboratory (ANL); Choi, E. [National High Magnetic Field Laboratory (Magnet Lab), Florida] [National High Magnetic Field Laboratory (Magnet Lab), Florida; Zhang, H. M. [Southeast University, Nanjing, China] [Southeast University, Nanjing, China; Dong, S. [Southeast University, Nanjing, China] [Southeast University, Nanjing, China; Zhou, H. D. [University of Tennessee (UT)] [University of Tennessee (UT)

2014-01-01T23:59:59.000Z

208

On the Sr I 4607 A Hanle depolarization signals in the quiet Sun  

E-Print Network [OSTI]

The Hanle depolarization signals of Sr 4607 A have been used to estimate the unsigned magnetic flux and magnetic energy existing in the quiet Sun photosphere. However, the Sr 4607 A Hanle signals are not sensitive to the unsigned flux and energy. They only bear information on the fraction of photosphere occupied by magnetic field strengths smaller than the Hanle saturation, which do not contribute to the unsigned flux and energy. We deduce an approximate expression for the relationship between magnetic fill factor and Hanle signal. When applied to existing Hanle depolarization measurements, it indicates that only 40% of the quiet Sun is filled by magnetic fields with a strength smaller than 60 G. The remaining 60% of the surface has field strengths above this limit. Such constraint will be needed to determine the distribution of magnetic field strengths existing in the quiet Sun.

J. Sanchez Almeida

2005-04-15T23:59:59.000Z

209

Revealing the atomic and electronic structure of a SrTiO{sub 3}/LaNiO{sub 3}/SrTiO{sub 3} heterostructure interface  

SciTech Connect (OSTI)

The atomic structures of SrTiO{sub 3} (STO)/LaNiO{sub 3} (LNO)/STO heterostructure interfaces were investigated by spherical aberration-corrected (C{sub S}) (scanning) transmission electron microscopy. Atomic displacement and lattice distortion measurements and electron energy loss spectroscopy (EELS) were used to quantitatively analyze the distortion of the interfacial octahedra and the bond length at the interfaces. Combined with high-resolution transmission electron microscopy (HRTEM) and scanning transmission electron microscopy analyses, two distinct interfacial atomic terminating layers are unambiguously determined. Ensuing quantitative HRTEM measurements revealed that the Ni-O bond length in the interfacial octahedral is elongated at the bottom interface (–NiO{sub 2}-SrO–). Atomic displacement shows structural relaxation effects when crossing the interfaces and lattice distortions across the interface is more pronounced in LNO than in STO. The Ti/O atomic ratio, La and Ti relative atomic ratio as derived by EELS quantification indicate non-stoichiometric composition at the interfaces. Distinct fine structures of Ti-L{sub 2,3} edge and O-K edge at the bottom and top interfaces are observed. By comparison, we are able to estimate Ti valency at both interfaces. Combining the structural distortions and Ti valency, the polar discontinuity and charge transfer at the interfaces are discussed.

Zhang, Zaoli, E-mail: zaoli.zhang@oeaw.ac.at [Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Leoben (Austria); Electron Microscopy Group for Materials Science, University of Ulm, Ulm (Germany); Soltan, S. [Max-Planck Institute for Solid State Research, D-70561 Stuttgart (Germany); Faculty of Science, Helwan University, 11795 Cairo (Egypt); Schmid, H. [INM—Leibniz-Institut für Neue Materialien, 66123 Saarbrücken (Germany); Habermeier, H.-U.; Keimer, B. [Max-Planck Institute for Solid State Research, D-70561 Stuttgart (Germany); Kaiser, U. [Electron Microscopy Group for Materials Science, University of Ulm, Ulm (Germany)

2014-03-14T23:59:59.000Z

210

MAPPING H-BAND SCATTERED LIGHT EMISSION IN THE MYSTERIOUS SR21 TRANSITIONAL DISK  

SciTech Connect (OSTI)

We present the first near infrared (NIR) spatially resolved images of the circumstellar transitional disk around SR21. These images were obtained with the Subaru HiCIAO camera, adaptive optics, and the polarized differential imaging technique. We resolve the disk in scattered light at H-band for stellocentric 0.''1 {<=} r {<=} 0.''6 (12 {approx}< r {approx}< 75 AU). We compare our results with previously published spatially resolved 880 {mu}m continuum Submillimeter Array images that show an inner r {approx}< 36 AU cavity in SR21. Radiative transfer models reveal that the large disk depletion factor invoked to explain SR21's sub-mm cavity cannot be 'universal' for all grain sizes. Even significantly more moderate depletions ({delta} = 0.1, 0.01 relative to an undepleted disk) than those that reproduce the sub-mm cavity ({delta} {approx} 10{sup -6}) are inconsistent with our H-band images when they are assumed to carry over to small grains, suggesting that surface grains scattering in the NIR either survive or are generated by whatever mechanism is clearing the disk midplane. In fact, the radial polarized intensity profile of our H-band observations is smooth and steeply inwardly-increasing (r {sup -3}), with no evidence of a break at the 36 AU sub-mm cavity wall. We hypothesize that this profile is dominated by an optically thin disk envelope or atmosphere component. We also discuss the compatibility of our data with the previously postulated existence of a sub-stellar companion to SR21 at r {approx} 10-20 AU, and find that we can neither exclude nor verify this scenario. This study demonstrates the power of multiwavelength imaging of transitional disks to inform modeling efforts, including the debate over precisely what physical mechanism is responsible for clearing these disks of their large midplane grains.

Follette, Katherine B.; Close, Laird [Steward Observatory, The University of Arizona, 933 N Cherry Ave, Tucson, AZ 85721 (United States)] [Steward Observatory, The University of Arizona, 933 N Cherry Ave, Tucson, AZ 85721 (United States); Tamura, Motohide; Hashimoto, Jun; Kwon, Jungmi; Kandori, Ryo [National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 (Japan)] [National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 (Japan); Whitney, Barbara [Astronomy Department, University of Wisconsin-Madison, 475 N. Charter Street, Madison, WI 53706 (United States)] [Astronomy Department, University of Wisconsin-Madison, 475 N. Charter Street, Madison, WI 53706 (United States); Grady, Carol [Eureka Scientific, 2452 Delmer, Suite 100, Oakland, CA 96002 (United States)] [Eureka Scientific, 2452 Delmer, Suite 100, Oakland, CA 96002 (United States); Andrews, Sean M. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)] [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Wisniewski, John [H.L. Dodge Department of Physics and Astronomy, University of Oklahoma, 440 W Brooks St Norman, OK 73019 (United States)] [H.L. Dodge Department of Physics and Astronomy, University of Oklahoma, 440 W Brooks St Norman, OK 73019 (United States); Brandt, Timothy D.; Dong, Ruobing [Department of Astrophysical Sciences, Princeton University, NJ 08544 (United States)] [Department of Astrophysical Sciences, Princeton University, NJ 08544 (United States); Mayama, Satoshi [The Center for the Promotion of Integrated Sciences, The Graduate University for Advanced Studies (Sokendai), Shonan International Village, Hayama-cho, Miura-gun, Kanagawa 240-0193 (Japan)] [The Center for the Promotion of Integrated Sciences, The Graduate University for Advanced Studies (Sokendai), Shonan International Village, Hayama-cho, Miura-gun, Kanagawa 240-0193 (Japan); Abe, Lyu [Laboratoire Lagrange, UMR7293, Universite de Nice-Sophia Antipolis, CNRS, Observatoire de la Cote d'Azur, F-06300 Nice (France)] [Laboratoire Lagrange, UMR7293, Universite de Nice-Sophia Antipolis, CNRS, Observatoire de la Cote d'Azur, F-06300 Nice (France); Brandner, Wolfgang; Feldt, Markus [Max Planck Institute for Astronomy, Koenigstuhl 17, D-69117 Heidelberg (Germany)] [Max Planck Institute for Astronomy, Koenigstuhl 17, D-69117 Heidelberg (Germany); Carson, Joseph [Department of Physics and Astronomy, College of Charleston, 58 Coming St., Charleston, SC 29424 (United States)] [Department of Physics and Astronomy, College of Charleston, 58 Coming St., Charleston, SC 29424 (United States); Currie, Thayne [Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street M5S 3H4, Toronto Ontario (Canada)] [Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street M5S 3H4, Toronto Ontario (Canada); Egner, Sebastian E. [Subaru Telescope, 650 North Aohoku Place, Hilo, HI 96720 (United States)] [Subaru Telescope, 650 North Aohoku Place, Hilo, HI 96720 (United States); Goto, Miwa, E-mail: kfollette@as.arizona.edu [Universitats-Sternwarte Munchen, Ludwig-Maximilians-Universitat, Scheinerstr. 1, D-81679 Munchen (Germany)] [Universitats-Sternwarte Munchen, Ludwig-Maximilians-Universitat, Scheinerstr. 1, D-81679 Munchen (Germany); and others

2013-04-10T23:59:59.000Z

211

Optically pumped cerium-doped LiSrAlF{sub 6} and LiCaAlF{sub 6}  

DOE Patents [OSTI]

Ce{sup 3+}-doped LiSrAlF{sub 6} crystals are pumped by ultraviolet light which is polarized along the c axis of the crystals to effectively energize the laser system. In one embodiment, the polarized fourth harmonic light output from a conventional Nd:YAG laser operating at 266 nm is arranged to pump Ce:LiSrAlF{sub 6} with the pump light polarized along the c axis of the crystal. The Ce:LiSrAlF{sub 6} crystal may be placed in a laser cavity for generating tunable coherent ultraviolet radiation in the range of 280-320 nm. Additionally, Ce-doped crystals possessing the LiSrAlF{sub 6} type of chemical formula, e.g. Ce-doped LiCaAlF{sub 6} and LiSrGaF{sub 6}, can be used. Alternative pump sources include an ultraviolet-capable krypton or argon laser, or ultraviolet emitting flashlamps. The polarization of the pump light will impact operation. The laser system will operate efficiently when light in the 280-320 nm gain region is injected or recirculated in the system such that the beam is also polarized along the c axis of the crystal. The Ce:LiSrAlF{sub 6} laser system can be configured to generate ultrashort pulses, and it may be used to pump other devices, such as an optical parametric oscillator. 10 figs.

Marshall, C.D.; Payne, S.A.; Krupke, W.F.

1996-05-14T23:59:59.000Z

212

Optically pumped cerium-doped LiSrAlF.sub.6 and LiCaAlF.sub.6  

DOE Patents [OSTI]

Ce.sup.3+ -doped LiSrAlF.sub.6 crystals are pumped by ultraviolet light which is polarized along the c axis of the crystals to effectively energize the laser system. In one embodiment, the polarized fourth harmonic light output from a conventional Nd:YAG laser operating at 266 nm is arranged to pump Ce:LiSrAlF.sub.6 with the pump light polarized along the c axis of the crystal. The Ce:LiSrAlF.sub.6 crystal may be placed in a laser cavity for generating tunable coherent ultraviolet radiation in the range of 280-320 nm. Additionally, Ce-doped crystals possessing the LiSrAlF.sub.6 type of chemical formula, e.g. Ce-doped LiCaAlF.sub.6 and LiSrGaF.sub.6, can be used. Alternative pump sources include an ultraviolet-capable krypton or argon laser, or ultraviolet emitting flashlamps. The polarization of the pump light will impact operation. The laser system will operate efficiently when light in the 280-320 nm gain region is injected or recirculated in the system such that the beam is also polarized along the c axis of the crystal. The Ce:LiSrAlF.sub.6 laser system can be configured to generate ultrashort pulses, and it may be used to pump other devices, such as an optical parametric oscillator.

Marshall, Christopher D. (Livermore, CA); Payne, Stephen A. (Castro Valley, CA); Krupke, William F. (Pleasanton, CA)

1996-01-01T23:59:59.000Z

213

Super-Stable, Highly Monodisperse Plasmonic Nanocrystals with 500 Gold Atoms: Au~500(SR)~120  

SciTech Connect (OSTI)

Determining the composition of plasmonic nanoparticles is challenging due to a deficiency in tools capable of accurately evaluating the number of atoms. Mass spectrometry plays a significant role in determining nanoparticle composition at the atomic level. Significant progress has been made in understanding ultra-small gold nanoparticles, like Au25(SR)18 and Au38(SR)24, with a Au core diameter of 0.97 and 1.3 nm, respectively. However, progress in small plasmonic nanoparticles (2 - 5 nm) is currently challenging, due in part to limitations in synthesizing monodisperse nanoparticles. Here, we report a plasmonic nanocrystal that is highly monodisperse, with an unprecedented variation of less than 20 gold atoms. The composition of the super-stable plasmonic nanocrystals at 115 kDa was determined to contain Au500 10SR120 3. The Au~500 system, named Faraduarate-500, is the largest size to be characterized using high resolution ESI mass spectrometry. Atomic pair distribution function (PDF) data shows that the local atomic structure is consistent with a face-centered cubic (fcc) or Marks decahedral arrangement. High resolution scanning transmission electron microscopy images show that the diameter is 2.4 0.1 nm. The radius of gyration measured by small angle X-ray scattering (SAXS), is 1.05 0.05 nm, and the size and the shape of SAXS molecular envelope are in agreement with TEM and PDF measurements.

Kumara, Chanaka [University of Mississippi, The; Zuo, Xiaobing [Advanced Photon Source, Argonne National Laboratory (ANL); Ilavsky, Dr. Jan [Argonne National Laboratory (ANL); Chapman, Karena [Advanced Photon Source, Argonne National Laboratory (ANL); Cullen, David A [ORNL; Dass, Amala [University of Mississippi, The

2014-01-01T23:59:59.000Z

214

110K Bi-Sr-Ca-Cu-O superconductor oxide and method for making same  

DOE Patents [OSTI]

A superconductor is disclosed consisting of a sufficiently pure phase of the oxides of Bi, Sr, Ca, and Cu to exhibit a resistive zero near 110K resulting from the process of forming a mixture of Bi[sub 2]O[sub 3], SrCO[sub 3], CaCO[sub 3] and CuO into a particulate compact wherein the atom ratios are Bi[sub 2], Sr[sub 1.2-2.2], Ca[sub 1.8-2.4], Cu[sub 3]. Thereafter, heating the particulate compact rapidly in the presence of oxygen to an elevated temperature near the melting point of the oxides to form a sintered compact, and then maintaining the sintered compact at the elevated temperature for a prolonged period of time. The sintered compact is cooled and reground. Thereafter, the reground particulate material is compacted and heated in the presence of oxygen to an elevated temperature near the melting point of the oxide and maintained at the elevated temperature for a time sufficient to provide a sufficiently pure phase to exhibit a resistive zero near 110K. 7 figs.

Veal, B.W.; Downey, J.W.; Lam, D.J.; Paulikas, A.P.

1992-12-22T23:59:59.000Z

215

High temperature crystal structures and superionic properties of SrCl{sub 2}, SrBr{sub 2}, BaCl{sub 2} and BaBr{sub 2}  

SciTech Connect (OSTI)

The structural properties of the binary alkaline-earth halides SrCl{sub 2}, SrBr{sub 2}, BaCl{sub 2} and BaBr{sub 2} have been investigated from ambient temperature up to close to their melting points, using the neutron powder diffraction technique. Fluorite-structured SrCl{sub 2} undergoes a gradual transition to a superionic phase at 900-1100 K, characterised by an increasing concentration of anion Frenkel defects. At a temperature of 920(3) K, the tetragonal phase of SrBr{sub 2} undergoes a first-order transition to a cubic fluorite phase. This high temperature phase shows the presence of extensive disorder within the anion sublattice, which differs from that found in superionic SrCl{sub 2}. BaCl{sub 2} and BaBr{sub 2} both adopt the cotunnite crystal structure under ambient conditions. BaCl{sub 2} undergoes a first-order structural transition at 917(5) K to a disordered fluorite-structured phase. The relationship between the (disordered) crystal structures and the ionic conductivity behaviour is discussed and the influence of the size of the mobile anion on the superionic behaviour is explored. - Graphical abstract: Anomalous behaviour of the lattice expansion of SrCl{sub 2} at temperatures of {approx}1000 K is associated with the gradual transition to a superionic phase, whilst SrBr{sub 2} undergoes a first-order structural transition ({beta}{yields}{alpha}) to a fluorite-structured superionic phase at 920(3) K. Highlights: > Anomalous behaviour of the lattice expansion of SrCl{sub 2} occurs at temperatures {approx}1000 K. > Crystal structure of {beta}-SrBr{sub 2} is described in detail. > On heating, SrBr{sub 2} and BaCl{sub 2} transform to a fluorite-structured superionic phase. > Temperature dependence of the BaCl{sub 2} and BaBr{sub 2} structures is presented. > Nature of the superionic phases within the alkaline-earth halides is discussed.

Hull, Stephen, E-mail: stephen.hull@stfc.ac.uk [The ISIS Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX (United Kingdom); Norberg, Stefan T. [The ISIS Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX (United Kingdom); Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-412 96 Gothenburg (Sweden); Ahmed, Istaq; Eriksson, Sten G. [Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-412 96 Gothenburg (Sweden); Mohn, Chris E. [Department of Chemistry and Centre for Materials Science and Nanotechnology, University of Oslo, P.O. Box 1033 Blindern, N-0315 Oslo (Norway)

2011-11-15T23:59:59.000Z

216

ARTEMIS Summary Plots for J.S. Halekas  

E-Print Network [OSTI]

/Proton Proton Temp (Moment high Gme res/Fit low Gme res) MagneGc Field ConvecGon E-Field ConnecGon (Red = in wake, Green = connected to wake Blue = connected no good in solar wind, iffy in magnetosheath, okay in magnetosphere

California at Berkeley, University of

217

Revised 8/15/2008 JS Building Evacuation (Dixon Rec)  

E-Print Network [OSTI]

Racquetball Courts. Clear maintenance hallway. Verify ORC area is clear and pick up Evacuation Bag. Clear of the south lawn. If ICC Staff is present, have them clear the ICC. If ORC staff is present, have them clear the ORC. EXIT EAST ENTRY Lifeguard Staff: LIFEGUARD STATION GUARD(S): gather radio, 1st Aid kit

Escher, Christine

218

Preben J.S. Vie Characterisation and Optimisation  

E-Print Network [OSTI]

cells has an elegant approach to solving some of the major environmental issues. Fuel cells have a potential of high fuel efficiency in addition to a pollution free exhaust. I was enchanted. In January 1996 in this thesis evolved. Without Hans Petersen's electronic expertise, the building of the fuel cell test

Kjelstrup, Signe

219

No-Arbitrage Pricing for Dividend-Paying Securities in Discrete-Time Markets with Transaction Costs  

E-Print Network [OSTI]

], Rogers [Rog94], Jacod and Shiryaev [JS98], and Kabanov and Stricker [KS01b]). Using advanced concepts was carried out by Kabanov and Stricker [KS01a]. Under the assumption that the state space is finite in Kabanov, R´asonyi, and Stricker [KRS02], where a version of the FFTAP was proven under the efficient

Heller, Barbara

220

Single-crystal epitaxial thin films of SrFeO{sub 2} with FeO{sub 2} 'infinite layers'  

SciTech Connect (OSTI)

Single-crystal thin films of SrFeO{sub 2}, which is an oxygen-deficient perovskite with ''infinite layers'' of Fe{sup 2+}O{sub 2}, were prepared by using CaH{sub 2} for low-temperature reduction of epitaxial SrFeO{sub 2.5} single-crystal films deposited on KTaO{sub 3} substrates. This reduction process, removing oxygen ions from the perovskite structure framework and causing rearrangements of oxygen ions, topotactically transforms the brownmillerite SrFeO{sub 2.5} to the c-axis oriented SrFeO{sub 2}.

Inoue, Satoru; Kawai, Masanori; Shimakawa, Yuichi [Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011 (Japan); Mizumaki, Masaichiro; Kawamura, Naomi [Japan Synchrotron Radiation Research Institute/SPring-8, Sayo, Hyogo 679-5198 (Japan); Watanabe, Takashi; Tsujimoto, Yoshihiro; Kageyama, Hiroshi; Yoshimura, Kazuyoshi [Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502 (Japan)

2008-04-21T23:59:59.000Z

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221

Tuning the Jeff=1/2 insulating state via electron doping and pressure in the double-layered iridate Sr3Ir2O7  

DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

Sr3Ir2O7 exhibits a novel Jeff=12 insulating state that features a splitting between Jeff=1/2 and 3/2 bands due to spin-orbit interaction. We report a metal-insulator transition in Sr3Ir2O7 via either dilute electron doping (La3+ for Sr2+) or application of high pressure up to 35 GPa. Our study of single-crystal Sr3Ir2O7 and (Sr1?xLax)3Ir2O7 reveals that application of high hydrostatic pressure P leads to a drastic reduction in the electrical resistivity by as much as six orders of magnitude at a critical pressure PC = 13.2 GPa, manifesting a closing of the gap; but further increasing P up to 35 GPa produces no fully metallic state at low temperatures, possibly as a consequence of localization due to a narrow distribution of bonding angles ?. In contrast, slight doping of La3+ ions for Sr2+ ions in Sr3Ir2O7 readily induces a robust metallic state in the resistivity at low temperatures; the magnetic ordering temperature is significantly suppressed but remains finite for (Sr0.95La0.05)3Ir2O7 where the metallic state occurs. The results are discussed along with comparisons drawn with Sr2IrO4, a prototype of the Jeff=1/2 insulator.

Li, L.; Kong, P. P.; Qi, T. F.; Jin, C. Q.; Yuan, S. J.; DeLong, L. E.; Schlottmann, P.; Cao, G.

2013-06-01T23:59:59.000Z

222

Radioactive contamination of cistern waters along the Croatian coast of the Adriatic Sea by [sup 90]Sr  

SciTech Connect (OSTI)

Measurements of radioactive contamination of water samples from cisterns collecting rainwater containing fission products from roofs and other surfaces have been carried out along the Croatian coast of the Adriatic sea since 1968. An exponential decline of radioactivity followed the nuclear moratorium. After the nuclear accident at Chernobyl, higher levels of [sup 137]Cs and [sup 90]Sr were detected again, with cistern waters being the only environmental samples in Croatia in which elevated [sup 90]Sr activities persisted for several years. For the pre-Chernobyl period, the observed mean residence time of [sup 90]Sr in cistern waters, estimated to be 6.2 [+-] 1.9 y, was similar to that calculated for fallout. Contrary, for the post-Chernobyl time, observed [sup 90]Sr mean residence time was calculated to be considerably shorter, reflecting the tropospheric mean residence time. The annual dose for the critical adult population received from [sup 90]Sr and [sup 137]Cs by drinking cistern water was estimated to be very small, in the 1990's less than few [micro]Sv y[sup [minus]1].

Franic, Z.; Lokobauer, N.; Marovic, G. (Inst. for Medical Research and Occupational Health, Zagreb (Croatia). Radiation Protection Unit)

1999-07-01T23:59:59.000Z

223

Interaction of Sr-90 with site candidate soil for demonstration disposal facility at Serpong  

SciTech Connect (OSTI)

Interaction of radiostrontium (Sr-90) with site candidate soil for demonstration disposal facility to be constructed in the near future at Serpong has been done. This activity is to anticipate the interim storage facility at Serpong nuclear area becomes full off condition, and show to the public how radioactive waste can be well managed with the existing technology. To ensure that the location is save, a reliability study of site candidate soil becomes very importance to be conducted through some experiments consisted some affected parameters such as contact time, effect of ionic strength, and effect of Sr{sup +} ion in solution. Radiostrontium was used as a tracer on the experiments and has role as radionuclide reference in low-level radioactive waste due to its long half-live and it's easy to associate with organism in nature. So, interaction of radiostrontium and soil samples from site becomes important to be studied. Experiment was performed in batch method, and soil sample-solution containing radionuclide was mixed in a 20 ml of PE vial. Ratio of solid: liquid was 10{sup ?2} g/ml. Objective of the experiment is to collect the specific characteristics data of radionuclide sorption onto soil from site candidate. Distribution coefficient value was used as indicator where the amount of initial and final activities of radiostrontium in solution was compared. Result showed that equilibrium condition was reached after contact time 10 days with Kd values ranged from 1600-2350 ml/g. Increased in ionic strength in solution made decreased of Kd value into soil sample due to competition of background salt and radiostrontium into soil samples, and increased in Sr ion in solution caused decreased of Kd value in soil sample due to limitation of sorption capacity in soil samples. Fast condition in saturated of metal ion into soil samples was reached due to a simple reaction was occurred.

Setiawan, Budi, E-mail: bravo@batan.go.id [Radwaste Technology Center-National Nuclear Energy Agency, PUSPIPTEK, Serpong-Tangerang 15310 (Indonesia); Mila, Oktri; Safni [Dept. of Chemistry, Fac. of Math. and Nat. Sci., Andalas University, Kampus Limau Manis, Padang-West Sumatra 25163 (Indonesia)

2014-03-24T23:59:59.000Z

224

Ultrafast Magnetization Dynamics of SrRuO3 Thin Films  

SciTech Connect (OSTI)

Itinerant ferromagnet SrRuO3 has drawn interest from physicists due to its unusual transport and magnetic properties as well as from engineers due to its low resistivity and good lattice-matching to other oxide materials. The exact electronic structure remains a mystery, as well as details of the interactions between magnetic and electron transport properties. This thesis describes the use of time-resolved magneto-optical Kerr spectroscopy to study the ferromagnetic resonance of SrRuO3 thin films, where the ferromagnetic resonance is initiated by a sudden change in the easy axis direction in response to a pump pulse. The rotation of the easy axis is induced by laser heating, taking advantage of a temperature-dependent easy axis direction in SrRuO3 thin films. By measuring the change in temperature of the magnetic system in response to the laser pulse, we find that the specific heat is dominated by magnons up to unusually high temperature, ~;;100 K, and thermal diffusion is limited by a boundary resistance between the film and the substrate that is not consistent with standard phonon reflection and scattering models. We observe a high FMR frequency, 250 GHz, and large Gilbert damping parameter, alpha ~;; 1, consistent with strong spin-orbit coupling. We observe a time-dependent change in the easy axis direction on a ps time-scale, and we find that parameters associated with the change in easy axis, as well as the damping parameter, have a non-monotonic temperature dependence similar to that observed in anomalous Hall measurements.

Langner, Matthew C

2009-05-19T23:59:59.000Z

225

Effects of lithium additions on processing of Bi-Sr-Ca-Cu-O superconducting tapes  

SciTech Connect (OSTI)

Lithium additions to the high-temperature superconductor Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub x} (2212) increased superconducting transition temperatures and improved resistance to effects of magnetic fields. In addition, these additions lowered the melting point of 2212 and increased reaction kinetics. Ag-clad tapes fabricated from 2212 with and without Li exhibited profound differences. For heating to temperatures less than or equal to 840{degrees}C, grain growth and sintering were much more substantial in the tapes containing Li.

Goretta, K.C.; Li, Y.F.; Poeppel, R.B. [Argonne National Lab., IL (United States); Wu, S.; Guo, J. [Illinois Univ., Urbana, IL (United States). Dept. of Nuclear Engineering; Schwartz, J. [Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Laboratory

1994-01-01T23:59:59.000Z

226

Fabrication of submicron La$_{2-x}$Sr$_{x}$CuO$_{4}$ intrinsic Josephson junction stacks  

E-Print Network [OSTI]

Intrinsic Josephson junction (IJJ) stacks of cuprate superconductors have potential to be implemented as intrinsic phase qubits working at relatively high temperatures. We report success in fabricating submicron La$_{2-x}$Sr$_{x}$CuO$_{4}$ (LSCO) IJJ stacks carved out of single crystals. We also show a new fabrication method in which argon ion etching is performed after focused ion beam etching. As a result, we obtained an LSCO IJJ stack in which resistive multi-branches appeared. It may be possible to control the number of stacked IJJs with an accuracy of a single IJJ by developing this method.

Kubo, Yuimaru; Tanaka, Takayoshi; Ueda, Shinya; Ishii, Satoshi; Tsuda, Shunsuke; Islam, A T M Nazmul; Tanaka, Isao; Takano, Yoshihiko; 10.1063/1.3544037

2011-01-01T23:59:59.000Z

227

Weak interaction rates for Kr and Sr waiting-point nuclei under rp-process conditions  

E-Print Network [OSTI]

Weak interaction rates are studied in neutron deficient Kr and Sr waiting-point isotopes in ranges of densities and temperatures relevant for the rp-process. The nuclear structure is described within a microscopic model (deformed QRPA) that reproduces not only the half-lives but also the Gamow-Teller strength distributions recently measured. The various sensitivities of the decay rates to both density and temperature are discussed. Continuum electron capture is shown to contribute significantly to the weak rates at rp-process conditions.

P. Sarriguren

2009-10-06T23:59:59.000Z

228

Shape mixing and beta-decay properties of neutron-deficient Kr and Sr isotopes  

E-Print Network [OSTI]

Gamow-Teller strength distributions and beta-decay half-lives in neutron-deficient Kr and Sr isotopes are investigated within a deformed quasiparticle random phase approximation. The approach is based on a selfconsistent Skyrme Hartree-Fock mean field with pairing correlations and residual separable particle-hole and particle-particle forces. A simple two-level model is used to mix the nuclear shapes into the physical ground state. Good agreement with experiment is found with shape mixing coefficients which are consistent with those obtained phenomenologically from mixing of rotational bands.

P. Sarriguren

2009-03-31T23:59:59.000Z

229

Special Inquiry: INS-SR-13-01 | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage » SearchEnergyDepartmentScoping StudyEnergySpecial Inquiry: INS-SR-13-01

230

Special Inquiry: OAS-SR-11-01 | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage » SearchEnergyDepartmentScoping StudyEnergySpecial Inquiry:OAS-SR-11-01

231

Note: Spatial resolution of Fuji BAS-TR and BAS-SR imaging plates  

SciTech Connect (OSTI)

The spatial resolution of two types of imaging plates, Fuji BAS-TR and Fuji BAS-SR, has been measured using a knife-edge x-ray source of 8-keV Cu K{sub {alpha}} radiation. The values for the spatial resolution, defined as the distance between 10% and 90% levels of the edge spread function, are 94 {mu}m and 109 {mu}m, respectively. The resolution values are important for quantitative analysis of x-ray and particle imaging and spectroscopic diagnostics.

Fiksel, G.; Marshall, F. J.; Mileham, C.; Stoeckl, C. [Laboratory for Laser Energetics, University of Rochester, 250 East River Rd., Rochester, New York 14623-1299 (United States)

2012-08-15T23:59:59.000Z

232

Observation of strontium segregation in LaAlO{sub 3}/SrTiO{sub 3} and NdGaO{sub 3}/SrTiO{sub 3} oxide heterostructures by X-ray photoemission spectroscopy  

SciTech Connect (OSTI)

LaAlO{sub 3} and NdGaO{sub 3} thin films of different thicknesses have been grown by pulsed laser deposition on TiO{sub 2}-terminated SrTiO{sub 3} single crystals and investigated by soft X-ray photoemission spectroscopy. The surface sensitivity of the measurements has been tuned by varying photon energy h? and emission angle ?. In contrast to the core levels of the other elements, the Sr 3d line shows an unexpected splitting for higher surface sensitivity, signaling the presence of a second strontium component. From our quantitative analysis we conclude that during the growth process Sr atoms diffuse away from the substrate and segregate at the surface of the heterostructure, possibly forming strontium oxide.

Treske, Uwe; Heming, Nadine; Knupfer, Martin; Büchner, Bernd; Koitzsch, Andreas, E-mail: a.koitzsch@ifw-dresden.de [Institute for Solid State Research, IFW-Dresden, P.O. Box 270116, DE-01171 Dresden (Germany); Di Gennaro, Emiliano; Scotti di Uccio, Umberto; Miletto Granozio, Fabio [CNR-SPIN and Dipartimento di Fisica, Complesso Universitario di Monte S. Angelo, Via Cintia, 80126 Naples (Italy); Krause, Stefan [Helmholtz-Zentrum Berlin, BESSY, Albert-Einstein-Str. 15, 12489 Berlin (Germany)

2014-01-01T23:59:59.000Z

233

Tuning the dead-layer behavior of La{sub 0.67}Sr{sub 0.33}MnO{sub 3}/SrTiO{sub 3} via interfacial engineering  

SciTech Connect (OSTI)

The dead-layer behavior, deterioration of the bulk properties in near-interface layers, restricts the applications of many oxide heterostructures. We present the systematic study of the dead-layer in La{sub 0.67}Sr{sub 0.33}MnO{sub 3}/SrTiO{sub 3} grown by ozone-assisted molecular beam epitaxy. Dead-layer behavior is systematically tuned by varying the interfacial doping, while unchanged with varied doping at any other atomic layers. In situ photoemission and low energy electron diffraction measurements suggest intrinsic oxygen vacancies at the surface of ultra-thin La{sub 0.67}Sr{sub 0.33}MnO{sub 3}, which are more concentrated in thinner films. Our results show correlation between interfacial doping, oxygen vacancies, and the dead-layer, which can be explained by a simplified electrostatic model.

Peng, R.; Xu, H. C.; Xia, M.; Zhao, J. F.; Xie, X.; Xu, D. F.; Xie, B. P., E-mail: bpxie@fudan.edu.cn; Feng, D. L., E-mail: dlfeng@fudan.edu.cn [State Key Laboratory of Surface Physics, Department of Physics, and Advanced Materials Laboratory, Fudan University, Shanghai 200433 (China)

2014-02-24T23:59:59.000Z

234

Fabricating superconducting interfaces between artificially grown LaAlO{sub 3} and SrTiO{sub 3} thin films  

SciTech Connect (OSTI)

Realization of a fully metallic two-dimensional electron gas (2DEG) at the interface between artificially grown LaAlO{sub 3} and SrTiO{sub 3} thin films has been an exciting challenge. Here we present for the first time the successful realization of a superconducting 2DEG at interfaces between artificially grown LaAlO{sub 3} and SrTiO{sub 3} thin films. Our results highlight the importance of two factors—the growth temperature and the SrTiO{sub 3} termination. We use local friction force microscopy and transport measurements to determine that in normal growth conditions the absence of a robust metallic state at low temperature in the artificially grown LaAlO{sub 3}/SrTiO{sub 3} interface is due to the nanoscale SrO segregation occurring on the SrTiO{sub 3} film surface during the growth and the associated defects in the SrTiO{sub 3} film. By adopting an extremely high SrTiO{sub 3} growth temperature, we demonstrate a way to realize metallic, down to the lowest temperature, and superconducting 2DEG at interfaces between LaAlO{sub 3} layers and artificially grown SrTiO{sub 3} thin films. This study paves the way to the realization of functional LaAlO{sub 3}/SrTiO{sub 3} superlattices and/or artificial LaAlO{sub 3}/SrTiO{sub 3} interfaces on other substrates.

Li, Danfeng, E-mail: Danfeng.Li@unige.ch; Gariglio, Stefano; Cancellieri, Claudia; Fête, Alexandre; Stornaiuolo, Daniela; Triscone, Jean-Marc [DPMC, University of Geneva, 24 Quai Ernest Ansermet, 1211 Geneva (Switzerland)

2014-01-01T23:59:59.000Z

235

Raman spectra and magnetization of all-ferromagnetic superlattices grown on (110) oriented SrTiO{sub 3}  

SciTech Connect (OSTI)

Superlattices consist of two ferromagnets La{sub 0.7}Sr{sub 0.3}MnO{sub 3} (LSMO) and SrRuO{sub 3} (SRO) were grown in (110)-orientation on SrTiO{sub 3} (STO) substrates. The x-ray diffraction and Raman spectra of these superlattices show the presence of in-plane compressive strain and orthorhombic structure of less than 4 u.c. thick LSMO spacer, respectively. Magnetic measurements reveal several features including reduced magnetization, enhanced coercivity, antiferromagnetic coupling, and switching from antiferromagnetic to ferromagnetic coupling with magnetic field orientations. These magnetic properties are explained by the observed orthorhombic structure of spacer LSMO in Raman scattering which occurs due to the modification in the stereochemistry of Mn at the interfaces of SRO and LSMO.

Behera, B. C.; Ravindra, A. V.; Padhan, P. [Department of Physics, Indian Institute of Technology Madras, Chennai 600036 (India); Prellier, W. [Laboratoire CRISMAT, CNRS UMR 6508, ENSICAEN, 6 Bd du Marehal Juin, F-14050 Caen Cedex (France)

2014-03-03T23:59:59.000Z

236

Optical absorption in epitaxial La{sub 1-x}Sr{sub x}FeO{sub 3} thin films  

SciTech Connect (OSTI)

We report the dependence of optical absorption on Sr concentration in La{sub 1-x}Sr{sub x}FeO{sub 3} (LSFO) (x{<=}0.4) perovskite thin films. Strained epitaxial films were deposited on SrTiO{sub 3} substrates using oxide molecular beam epitaxy. We find systematic changes in the optical absorption spectra with increasing x including a red-shift of transition energies and the increasing presence of a lower energy transition within the fundamental gap of pure LaFeO{sub 3}. These results serve as a demonstration of the complex manner in which absorption spectra can be altered in complex oxides via heterovalent A-site substitution.

Scafetta, M D.; Xie, Y. J.; Torres, M.; Spanier, J. E.; May, S. J. [Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104 (United States)] [Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104 (United States)

2013-02-25T23:59:59.000Z

237

SR0001  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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238

SR0002  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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239

SR0003  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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240

SR0004  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template and1 THIS7,DOEFor,

Note: This page contains sample records for the topic "js rogers sr" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

SR0005  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template and1 THIS7,DOEFor,April

242

SR0006  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template and1

243

SR0007  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template and1Environmental Cleanup

244

SR0008  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template and1Environmental

245

SR0009  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template and1EnvironmentalJune 8,

246

SR0010  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template and1EnvironmentalJune

247

SR0011  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template and1EnvironmentalJune26,

248

SR0012  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template

249

SR0013  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000 Media Contact:

250

SR0014  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000 Media

251

SR0015  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000 Media, 2000 Media

252

SR0016  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000 Media, 2000

253

SR0017  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000 Media, 2000Bill

254

SR0018  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000 Media,

255

SR0101  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000 Media,8, 2001

256

SR0102  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000 Media,8, 200130,

257

SR0103  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000 Media,8,

258

SR0104  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000 Media,8,8, 2001

259

SR0105  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000 Media,8,8, 20014,

260

SR0106  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000 Media,8,8,

Note: This page contains sample records for the topic "js rogers sr" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

SR0107  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000 Media,8,8,4, 2001

262

SR0108  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000 Media,8,8,4,

263

SR0109  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000 Media,8,8,4,0,

264

SR0110  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000 Media,8,8,4,0,4,

265

SR0111  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000

266

SR0112  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000News Release Logo

267

SR0113?  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000News Release

268

SR0201  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000News

269

SR0203  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000News31, 2002 Media

270

SR0204  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000News31, 2002

271

SR0205  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000News31, 200219,

272

SR0206  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000News31, 200219,17,

273

SR0207  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000News31,

274

SR0208  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000News31,, 2002

275

SR0209  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000News31,, 20024,

276

SR0301  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000News31,,

277

SR0302  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000News31,,8, 2003

278

SR0303  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000News31,,8, 20032,

279

SR0304  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000News31,,8,

280

SR0305  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000News31,,8,2, 2003

Note: This page contains sample records for the topic "js rogers sr" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

SR0501  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000News31,,8,2,

282

SR0503  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000News31,,8,2,14,

283

SR0505  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25, 2000News31,,8,2,14,1,

284

SR0601  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25,

285

SR0603  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25,July 10, 2006 Media

286

SR0604  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25,July 10, 2006 MediaDOE

287

SR0605  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25,July 10, 2006

288

SR0606  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORN Template25,July 10, 200631, 2006

289

SR0608  

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290

SR0701?  

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291

SR0703  

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292

SR0704  

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293

SR0704  

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294

SR0705  

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295

SR0706  

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296

SR0708  

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297

SR0804  

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298

SR9805  

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299

SR9806  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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300

SR9807  

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Note: This page contains sample records for the topic "js rogers sr" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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301

SR9901  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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302

SR9902  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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303

SR9903  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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304

SR9904  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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305

SR9908  

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306

SR9909  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORNRecovery Act Funding3,13, 1999

307

SR9910  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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308

SR9911  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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309

SR9912  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORNRecovery Act Funding3,13,

310

SR9913  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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311

SR9914  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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312

SR9916  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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313

SR9917  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStoriesSANDIA REPORTSORNRecovery Act Funding3,13,10,6, 1999

314

Neutron diffraction studies and magnetism in Ti doped SrFeO{sub 3??} systems  

SciTech Connect (OSTI)

The magnetic ground state of single phase tetragonal crystal structure with I4/mmm space group SrFe{sub 1?x}Ti{sub x}O{sub 3??} (x?=?0.2 and 0.3) is investigated from 2?K to 300?K. Strong irreversibility is observed in zero-field-cooled (ZFC) and field-cooled DC magnetization curves. Arrott plots show the absence of spontaneous magnetization (M{sub S}) down to 2?K, ruling out the possibility of long range ferromagnetic order. Neutron diffraction measurements carried out at H?=?0, 7?T (field cooled) at several temperatures above and below the T* (temperature at which M{sub ZFC}(T) is maximum) do not show any additional peaks and also no difference in intensity rules out, both the long range antiferromagnetic and ferromagnetic orders. Hence, the combined study of dc magnetization and neutron diffraction results reveals cluster spin glass behavior in SrFe{sub 1?x}Ti{sub x}O{sub 3??} (x?=?0.2 and 0.3)

Sendil Kumar, A.; Srinath, S., E-mail: srinath@uohyd.ac.in [School of Physics, University of Hyderabad, Hyderabad 500 046 (India); Babu, P. D. [UGC-DAE Consortium for Scientific Research, R-5 Shed, B.A.R.C, Mumbai 400 085 (India)

2014-03-14T23:59:59.000Z

315

Crystal structure determination of the oxynitride Sr{sub 2}TaO{sub 3}N  

SciTech Connect (OSTI)

The crystal structure of the strontium tantalum oxynitride Sr{sub 2}TaO{sub 3}N has been resolved by Rietveld refinement using time-of-flight neutron powder diffraction data. The structure is of the K{sub 2}NiF{sub 4} type with a partially ordered anion sublattice (tetragonal, I4/mmm, a = 4.04127(3) {angstrom}, c = 12.6073(2) {angstrom}, c/a = 3.120, Z = 2). The tantalum atoms are at the center of TaO{sub 2}(O, N){sub 4} octahedra built up from two oxygen atoms at the apexes and four (N + O) atoms statistically forming the median plane. The strontium atoms have a coordination number of nine: SrO{sub 5}(O, N){sub 4}. The profile agreement factors are R{sub p} = 0.022, R{sub wp} = 0.016, R{sub exp} = 0.012, and R{sub 1} = 0.063.

Diot, N.; Marchand, R. [Univ. de Rennes 1 (France). Lab. Verres et Ceramiques] [Univ. de Rennes 1 (France). Lab. Verres et Ceramiques; Haines, J.; Leger, J.M. [CNRS, Meudon (France). Lab. de Physicochimie des Materiaux] [CNRS, Meudon (France). Lab. de Physicochimie des Materiaux; Macaudiere, P. [Centre de Recherches d`Aubervilliers (France)] [Centre de Recherches d`Aubervilliers (France); Hull, S. [Rutherford Appleton Lab., Didcot (United Kingdom). ISIS Science Div.] [Rutherford Appleton Lab., Didcot (United Kingdom). ISIS Science Div.

1999-09-01T23:59:59.000Z

316

Crystal structure determination of the oxynitride Sr[sub 2]TaO[sub 3]N  

SciTech Connect (OSTI)

The crystal structure of the strontium tantalum oxynitride Sr[sub 2]TaO[sub 3]N has been resolved by Rietveld refinement using time-of-flight neutron powder diffraction data. The structure is of the K[sub 2]NiF[sub 4] type with a partially ordered anion sublattice (tetragonal, I4/mmm, a = 4.04127(3) [angstrom], c = 12.6073(2) [angstrom], c/a = 3.120, Z = 2). The tantalum atoms are at the center of TaO[sub 2](O, N)[sub 4] octahedra built up from two oxygen atoms at the apexes and four (N + O) atoms statistically forming the median plane. The strontium atoms have a coordination number of nine: SrO[sub 5](O, N)[sub 4]. The profile agreement factors are R[sub p] = 0.022, R[sub wp] = 0.016, R[sub exp] = 0.012, and R[sub 1] = 0.063.

Diot, N.; Marchand, R. (Univ. de Rennes 1 (France). Lab. Verres et Ceramiques); Haines, J.; Leger, J.M. (CNRS, Meudon (France). Lab. de Physicochimie des Materiaux); Macaudiere, P. (Centre de Recherches d'Aubervilliers (France)); Hull, S. (Rutherford Appleton Lab., Didcot (United Kingdom). ISIS Science Div.)

1999-09-01T23:59:59.000Z

317

The magnetic and crystal structures of Sr2IrO4: A neutron diffraction study  

SciTech Connect (OSTI)

We report a single-crystal neutron diffraction study of the layered Sr2IrO4. This work unambigu- ously determines the magnetic and crystal structures, and reveals that the spin orientation rigidly tracks the staggered rotation of the IrO6 octahedra in Sr2IrO4. The long-range antiferromagnetic order has a canted spin configuration with an ordered moment of 0.208(3) B/Ir site within the basal plane; a detailed examination of the spin canting yields 0.202(3) and 0.049(2) B/site for the a-axis and the b-axis, respectively. It is intriguing that forbidden nuclear reflections of space group I41/acd are also observed in a wide temperature range from 4 K to 600 K, which suggests a reduced crystal structure symmetry. This neutron scattering work provides a direct, well-refined experimen- tal characterization of the magnetic and crystal structures that are crucial to the understanding of the unconventional magnetism existent in this unusual magnetic insulator.

Ye, Feng [ORNL; Chi, Songxue [ORNL; Chakoumakos, Bryan C [ORNL; Fernandez-Baca, Jaime A [ORNL; Qi, Tongfei [University of Kentucky; Cao, Gang [University of Kentucky

2013-01-01T23:59:59.000Z

318

Strain relaxation in epitaxial SrRuO{sub 3} thin films on LaAlO{sub 3} substrates  

SciTech Connect (OSTI)

Strain relaxation behavior of epitaxial SrRuO{sub 3} thin films on (001) LaAlO{sub 3} substrates was investigated using high resolution X-ray diffraction. Lattice distortion and dislocation densities were systematically studied with samples under different growth conditions. Reciprocal space maps reveal different strain relaxation behavior in SrRuO{sub 3} thin films grown at different temperatures. Two kinds of strain relaxation mechanisms were proposed to understand the growth dynamics, including the evolution of threading dislocations and the tilt of crystalline planes.

Gao, M.; Du, H.; Dai, C.; Lin, Y. [State Key Laboratory of Electronic Thin films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054 (China)] [State Key Laboratory of Electronic Thin films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054 (China); Ma, C. R.; Liu, M.; Collins, G.; Zhang, Y. M.; Chen, C. L. [Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, Texas 78249, USA and Department of Physics and The Texas Center for Superconductivity, University of Houston, Houston, Texas 77204 (United States)] [Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, Texas 78249, USA and Department of Physics and The Texas Center for Superconductivity, University of Houston, Houston, Texas 77204 (United States)

2013-09-30T23:59:59.000Z

319

Isotope compositions (C, O, Sr, Nd) of vertebrate fossils from the Middle Eocene oil shale of Messel, Germany: Implications for their taphonomy  

E-Print Network [OSTI]

Isotope compositions (C, O, Sr, Nd) of vertebrate fossils from the Middle Eocene oil shale isotopes Diagenesis Enamel Messel Propalaeotherium The Middle Eocene oil shale deposits of Messel (~0.706) due to diagenetic Sr uptake from the lake water/oil shale. Enamel 18 Op values (~18 ± 0

Schöne, Bernd R.

320

Strontium oxide segregation at SrLaAlO4 surfaces A.E. Becerra-Toledo , L.D. Marks  

E-Print Network [OSTI]

Strontium oxide segregation at SrLaAlO4 surfaces A.E. Becerra-Toledo , L.D. Marks Northwestern surfaces We report observable segregation of strontium oxide at the surface of strontium lanthanum-dispersive X-ray spectroscopy showed that Sr and O segregation occurs on strontium lanthanum aluminate surfaces

Marks, Laurence D.

Note: This page contains sample records for the topic "js rogers sr" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Strain Effects on the Surface Chemistry of La[subscript 0.7]Sr[subscript 0.3]MnO[subscript 3  

E-Print Network [OSTI]

We report on the mechanistic effects of epitaxial strain on the surface chemistry, in particular the segregation of Sr cations on La0.7Sr0.3MnO3 (LSM) model dense thin films. Our results show that the LSM film surfaces are ...

Han, Jeong Woo

322

Isotope compositions (C, O, Sr, Nd) of vertebrate fossils from the Middle Eocene oil shale of Messel, Germany: Implications for their taphonomy  

E-Print Network [OSTI]

Isotope compositions (C, O, Sr, Nd) of vertebrate fossils from the Middle Eocene oil shale isotopes Diagenesis Enamel Messel Propalaeotherium The Middle Eocene oil shale deposits of Messel (~0.706) due to diagenetic Sr uptake from the lake water/oil shale. Enamel 18 Op values (~18 ± 0

Schöne, Bernd R.

323

Front End 5.1 Chris Rogers,  

E-Print Network [OSTI]

Chicane #12;9 Beam Energy After Chicane and absorber Origin? #12;10 Beam Energy After Cooler Origin? #12 species Examine energy spectrum ­ propose enhanced particle selection scheme #12;6 Beam Power Deposited Drift RF Capture Cooler RF Capture Chicane Taper #12;7 Remaining Beam Power #12;8 Beam Energy Before

McDonald, Kirk

324

Vanessa Marynn Rogers Rory Abbott Sayres  

E-Print Network [OSTI]

String Quartet) Beethoven: Sonata Pathétique (Adagio Cantabile) Bartók: Romanian Folk Dances Dvoák: Waltz

Grill-Spector, Kalanit

325

June 24, 2012 Dear Dr. Rogers  

E-Print Network [OSTI]

undergraduate degree at Bowling Green State University, and my daughter Green State University. I have over twenty years of experience in higher interest the opportunity to serve as the Vice President for Advancement at Bowling

Moore, Paul A.

326

First Look at Muon Chicane Chris Rogers,  

E-Print Network [OSTI]

radioactive Probably part of target remote handling area Beam dump has to handle significant beam energy for this momentum range e.g. used by mu2e experiments e.g. used by 6d cooling channels e.g. used by stellarators becomes radioactive Probably part of target remote handling area Beam dump has to handle significant

McDonald, Kirk

327

Solitary waves propagating over variable Roger Grimshaw  

E-Print Network [OSTI]

-de Vries (KdV) equation, At + cAx + µAAx + Axxx = 0 . (1) Here A(x, t) is the amplitude of the relevant

328

Beam Pulse Structure and Targets Roger Bennett  

E-Print Network [OSTI]

in a target. The shock wave travels through matter at the speed of sound, where E is Young's modulus of elasticity and is the density. E s = #12;The time taken for the wave to travel from the outer surface

McDonald, Kirk

329

Roger D.Peng Francesca Dominici  

E-Print Network [OSTI]

for investigating the health effects of air pollution and gives examples and case studies in R which demonstrate, and graduate students work- ing in the area of air pollution and health and others analyzing similar data of analyzing and understanding air pollution and health data. The case studies in each chapter demonstrate how

Dominici, Francesca

330

2002 Fusion Summer Study Roger Bangerter  

E-Print Network [OSTI]

............................................................................................................ 48 3.3.2 Plasma Facing Components/Heat Removal.............................................................................. 50 3.3.3 Heating, Current Drive and Fueling ........................................................................................ 53 3.3.4 Vacuum Vessel and Remote Handling

331

G4MICE vs ICOOL Chris Rogers,  

E-Print Network [OSTI]

a field map Grid spacing 5 mm in r and 1 mm in z Disable dynamic step size allocation #12; FieldsMICE field map 1.8 T0 T abs(Bicool Bg4mice ) #12; ICOOL Self ConsistencyFields only Choose grid size for magnetic field map Quite a hard cutoff as z grid size changes Gradual cutoff for radial grid

McDonald, Kirk

332

Roger Seitz Savannah River National Laboratory  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of Energy Power.pdf11-161-LNG |September 15,2015DepartmentDepartment of Energy9-09-24-01

333

THE FEDERAL ENERGY ADMINISTRATION By Roger Anders  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up from the GridwiseSiteDepartmentChallengeCompliance7/109 INSTITUTIONALFEDERAL

334

Revised List of Monogenic Stocks Roger Chetelat  

E-Print Network [OSTI]

report any problems they detect in our lines, such as aberrant segregation, incorrect phenotypes -- Aubergine P* SPON X NON LA4425 abi -- aborted inflorescence M* CHEM CSM NON 3-803 Aco-1 1 Aconitase-1 V

Ullrich, Paul

335

A series of layered intergrowth phases grown by molecular beam epitaxy: Sr{sub m}TiO{sub 2+m}(m=1-5)  

SciTech Connect (OSTI)

Sr{sub m}TiO{sub 2+m} phases having one TiO{sub 2} layer sandwiched between m SrO layers were grown using molecular beam epitaxy. The out-of-plane (in-plane) lattice parameters determined by x-ray diffraction were c(a)=9.14 A (3.78 A), 23.55 A (3.75 A), and 14.60 A (3.75 A) for Sr{sub 3}TiO{sub 5}, Sr{sub 4}TiO{sub 6}, and Sr{sub 5}TiO{sub 7}, respectively. Both lattice parameters change abruptly on going from the m=2 Ruddlesden-Popper phase to m=3 phase, indicating a significant change in the bond lengths (or strain states) on transitioning from the known members to the higher order members of this structural family. Electron microscopy confirmed the artificially layered structures.

Fisher, P.; Wang, S.; Skowronski, M.; Salvador, P. A.; Snyder, M.; Maksimov, O. [Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States); Electro-Optics Center, Pennsylvania State University, Freeport, Pennsylvania 16229 (United States)

2007-12-17T23:59:59.000Z

336

As[sub 2]S[sub 3]/Sr(Ti[sub 0.7]Co[sub 0.3])O[sub 3] and As[sub 2]S[sub 3]/Sr(Ti[sub 0.6]Fe[sub 0.4])O[sub 3] strip-loaded waveguides for integrated magneto-optical isolator applications  

E-Print Network [OSTI]

Sr(Ti[sub 0.6]Fe[sub 0.4])O[sub 3] (STF) and Sr(Ti[sub 0.7]Co[sub 0.3])O[sub 3] (STC) room-temperature ferromagnetic oxides were grown epitaxially on LaAlO[sub 3](001), (LaSr)(AlTa)O[sub 3] (001) and Si (001) substrates. ...

Bi, Lei

337

Direct real space observation of magneto-electronic inhomogeneity in ultra-thin film La{sub 0.5}Sr{sub 0.5}CoO{sub 3??} on SrTiO{sub 3}(001)  

SciTech Connect (OSTI)

Recent magnetotransport and neutron scattering measurements implicate interfacial magneto-electronic phase separation as the origin of the degradation in transport and magnetism in ultra-thin film La{sub 1?x}Sr{sub x}CoO{sub 3} on SrTiO{sub 3}(001). Here, using low temperature scanning tunneling microscopy and spectroscopy the first direct, real space observation of this nanoscopic electronic inhomogeneity is provided. Films of thickness 12.4?nm (32 unit cells) are found to exhibit spatially uniform conductance, in stark contrast to 4.7?nm (12 unit cell) films that display rich variations in conductance, and thus local density of states. The electronic heterogeneity occurs across a hierarchy of length scales (5–50?nm), with complex correlations with both topography and applied magnetic fields. These results thus provide a direct observation of magneto-electronic inhomogeneity in SrTiO{sub 3}(001)/La{sub 0.5}Sr{sub 0.5}CoO{sub 3} at thicknesses below 6–7?nm, in good agreement with less direct techniques.

Kelly, S.; Galli, F.; Aarts, J., E-mail: leighton@umn.edu, E-mail: aarts@physics.leidenuniv.nl [Department of Physics, Leiden University, 2300 RA Leiden (Netherlands); Bose, Shameek; Sharma, M.; Leighton, C., E-mail: leighton@umn.edu, E-mail: aarts@physics.leidenuniv.nl [Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455 (United States)

2014-09-15T23:59:59.000Z

338

Comparison of the Ca+HF(DF) and Sr+HF(DF) reaction dynamics Rong Zhang, David J. Rakestraw,a) Kenneth G. McKendrick,b) and Richard N. Zare  

E-Print Network [OSTI]

Comparison of the Ca+HF(DF) and Sr+HF(DF) reaction dynamics Rong Zhang, David J. Rakestraw family, Ca and Sr with rovibrationally selected HF or DF, has been carried out under single-collision conditions. A thermal beam of the alkaline earth atoms, Ca or Sr, is fired into a low-pressure gas of HF

Zare, Richard N.

339

Inclusion property of Cs, Sr, and Ba impurities in LiCl crystal formed by layer-melt crystallization  

SciTech Connect (OSTI)

Pyroprocessing is one of the promising technologies enabling the recycling of spent nuclear fuels from a commercial light water reactor (LWR). In general, pyroprocessing uses dry molten salts as electrolytes. In particular, LiCl waste salt after pyroprocessing contains highly radioactive I/II group fission products mainly composed of Cs, Sr, and Ba impurities. Therefore, it is beneficial to reuse LiCl salt in the pyroprocessing as an electrolyte for economic and environmental issues. Herein, to understand the inclusion property of impurities within LiCl crystal, the physical properties such as lattice parameter change, bulk modulus, and substitution enthalpy of a LiCl crystal having 0-6 at% Cs{sup +} or Ba{sup 2+} impurities under existence of 1 at% Sr{sup 2+} impurity were calculated via the first-principles density functional theory. The substitution enthalpy of LiCl crystals having 1 at% Sr{sup 2+} showed slightly decreased value than those without Sr{sup 2+} impurity. Therefore, through the substitution enthalpy calculation, it is expected that impurities will be incorporated within LiCl crystal as co-existed form rather than as a single component form. (authors)

Choi, Jung-Hoon; Cho, Yung-Zun; Lee, Tae-Kyo; Eun, Hee-Chul; Kim, Jun-Hong; Park, Hwan-Seo; Kim, In-Tae; Park, Geun-Il [Nuclear Fuel Cycle Waste Treatment Research Division, Korea Atomic Energy Research Institute, Daejeon, 305-353 (Korea, Republic of)

2013-07-01T23:59:59.000Z

340

Overall photocatalytic water splitting with NiOxSrTiO3 a revised Troy K. Townsend,a  

E-Print Network [OSTI]

catalysts assumes water oxidation to occur at the early transition metal oxide and water reduction at NiOx­La : KTaO3, and many layered perovskites. Introduction Splitting water into hydrogen and oxygen gas usingOverall photocatalytic water splitting with NiOx­SrTiO3 ­ a revised mechanism Troy K. Townsend

Osterloh, Frank

Note: This page contains sample records for the topic "js rogers sr" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Monodisperse porous polymer particles containing macrocyclic ether as a new class of sorbent for SR(II) separation  

SciTech Connect (OSTI)

Strontium{sup 90} is one of the typical fission products that may be found in high level liquid waste (HLLW). Separation of Sr{sup 90} prior to the vitrification is beneficial to the final treatment of solid radioactive waste. In this study, a new class of sorbent for Sr(II) was developed by loading the macrocyclic ether DtBuCH18C6 into the monodisperse porous polymer particles (MPPPs). The MPPPs are well-known as a promising chromatographic material due to the uniform particle size, porous morphology, good compatibility with organic extractants, and rigid matrix. The structure and micro-morphology of the sorbent particles were characterized. The adsorption behavior towards Sr(II) in HNO{sub 3} media was investigated by both batch and column experiments. High adsorption efficiency and selective separation of Sr(II) was obtained. The sorbent particles can be recycled for at least several times before obvious lose of the adsorption ability. This kind of sorbent possesses the potential to be used for strontium separation in radioactive liquid waste.

Leng, Yuxiao; Bai, Feifei [Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084 (China); Faculty of Chemical Science and Engineering, China University of Petroleum, Beijing 100084 (China); Ye, Gang; Wei, Jichao; Wang, Jianchen; Chen, Jing [Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084 (China)

2013-07-01T23:59:59.000Z

342

H: Advising/Sr Yr Plan Sheet.docx Rev.10/7/2010 CIVIL & ENVIRONMENTAL ENGINEERING  

E-Print Network [OSTI]

H: Advising/Sr Yr Plan Sheet.docx Rev.10/7/2010 CIVIL & ENVIRONMENTAL ENGINEERING Senior Year Plan of engineering interest and for preparation for employment and/or graduate study. Instructions: Students: Prior this form to the Senior Year Plan Collect-It site at: https

343

Review of the structural and electrical properties of the (La,Sr)(Co,Fe)O{sub 3} system  

SciTech Connect (OSTI)

The (La,Sr)(Co,Fe)O{sub 3} LSCF system has been extensively studied because of its potential use as oxygen permeable membranes and cathodes for solid oxide fuel cells. This paper reviews the results of some of these studies and describes the thermochemical and electrical conductivity behavior of this system as functions of composition, temperature (600 to 1,200 C) and oxygen activity (10{sup {minus}19} to 1 atm). The oxygen stoichiometry was measured thermogravimetrically. The results show that at 1,000 C for the composition of La{sub 0.6}Sr{sub 0.4}Co{sub 0.2}Fe{sub 0.8}O{sub 3} as many as 20% of the oxygen sites can become vacant upon reduction before dissociation occurs. The total electrical conductivity show that at 1000 C in air the electrical conductivity is about 200 S/cm for La{sub 0.6}Sr{sub 0.4}Co{sub 0.2}Fe{sub 0.8}O{sub 3}, but decreases with reduction as the oxygen vacancies reduce the number of carriers. Upon reduction, these oxides did not dissociate into binary oxides and metal in a simple step, but they formed transient compounds which with further reduction dissociated to La{sub 2}O{sub 3}, SrO, Co, and Fe.

Anderson, H.U.; Tai, L.W.; Chen, C.C.; Nasrallah, M.M.; Huebner, W. [Univ. of Missouri, Rolla, MO (United States). Dept. of Ceramic Engineering

1995-12-31T23:59:59.000Z

344

Synthesis and properties of Sr2CeO4 blue emission powder phosphor for field emission displays  

E-Print Network [OSTI]

for publication 19 January 1999 A blue emission powder phosphor Sr2CeO4 for field emission displays was preparedV. The emission peak of this phosphor is at 470 nm and Commission International de l'Eclairage coordinates are x 0

Wang, Zhong L.

345

Collective dynamics of Josephson fluxons in Bi2Sr2CaCu2O8d intrinsic junctions  

E-Print Network [OSTI]

in naturally stacked intrinsic Josephson junctions in Bi2Sr2- CaCu2O8þd single crystals were studied Keywords: Fluxon dynamics; Intrinsic Josephson junctions; Plasma excitation modes; Superradiant state 1 to high-frequency devices such as THz local oscilla- tors and mixers. Stacked long Josephson junctions

Lee, Hu-Jong

346

Analysis of the Impact of SR-ARQ on the IP Packet Delay Performance in Mobile Data  

E-Print Network [OSTI]

Analysis of the Impact of SR-ARQ on the IP Packet Delay Performance in Mobile Data Networks By in wired enviroment . . . . . . . . . . . . . . . . . . . . 43 3.2.2 TCP in the wireless environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 3.3.1 Scheduling algorithms for wired (error free) enviroment . . 50 3.3.2 Scheduling algorithms

Murphy, John

347

Depletion of glutathione in vivo as a method of improving the therapeutic ratio of misonidazole and SR 2508. [BSO; DEM  

SciTech Connect (OSTI)

Depletion of intracellular glutathione (GSH) can enhance misonidazole (MISO) radiosensitizing efficacy both in vivo and in vitro. However, such treatments may also enhance the systemic toxicity in animals. The purpose of the present study was to test various ways of depleting GSH levels in a variety of experimental mouse tumors, to measure the improvement in the efficacy of MISO and its less toxic analog SR 2508 by this depletion, and to determine the effect of daily GSH depletion on the toxicity MISO and SR 2508. GSH levels were measured daily for 5 days in tumors, livers and brains of mice injected daily with buthionine sulfoximine (BSO), with or without diethylmaleate (DEM). Daily doses of BSO depleted tumor levels of GSH to 20 to 40% of controls by 6 hr after each injection. Injection of DEM 6 hr after BSO further enhanced the depletion. Administration of MISO or SR 2508 at the time of maximum GSH depletion enhanced the MISO efficacy by factors of 2.6 to 8 for depletion to 8% of controls by BSO + DEM, but no enhancement of SR 2508 was seen with tumors at 20% GSH levels achieved with BSO alone in the preliminary experiment. The chronic toxicity of MISO was enhanced not at all or by a factor of up to 2 for BSO and BSO + DEM respectively.

Yu, N.Y.; Brown, J.M.

1984-08-01T23:59:59.000Z

348

Tunable blue light source by intracavity frequency doubling of a Cr-LiSrAIF6 laser  

E-Print Network [OSTI]

Tunable blue light source by intracavity frequency doubling of a Cr- LiSrAIF6 laser Franqois-switched operation at 10 kHz was intracavity frequency doubled by using a LiIOl crystal. The 230 ns tunable blue lasers emitting in the blue-green wavelength range are expected to be the key components for optical

Paris-Sud XI, Université de

349

Geothermal waters from the Taupo Volcanic Zone, New Zealand: Li,1 B and Sr isotopes characterization2  

E-Print Network [OSTI]

1 Geothermal waters from the Taupo Volcanic Zone, New Zealand: Li,1 B and Sr isotopes 13 In this study, we report chemical and isotope data for 23 geothermal water samples collected geothermal waters collected from deep boreholes16 in different geothermal fields (Ohaaki, Wairakei, Mokai

Paris-Sud XI, Université de

350

Crews conduct in-water geotechnical drilling near SR 520 in Seattle August 2012 FOR MORE INFORMATION  

E-Print Network [OSTI]

necessary approvals prior to conducting the work. WSDOT is observing best management practices to avoidCrews conduct in-water geotechnical drilling near SR 520 in Seattle August 2012 FOR MORE as they design foundations for the new bridges. A small crew will use a drill rig mounted on a barge to complete

Otis, Brian

351

First-principles insights on the magnetism of cubic SrTi1?xCoxO3??  

E-Print Network [OSTI]

We present hybrid density functional calculations suggesting that magnetism in cubic SrTi1 ? x Co x O3 ? ? (STCO) with x?=?0.25 is sensitive to the nearest neighbor arrangement of the Co and the presence of oxygen vacancies. ...

Florez Uribe, Juan Manuel

352

Videos | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Recovery Act update from Sr. Advisor Matt Rogers -- End of Obligations The Recovery Act is "Lighting Up" the streets of Philadelphia 200,000 homes weatherized under the Recovery...

353

65GHz Doppler Sensor with On-Chip Antenna in 0.18m SiGe Terry Yao, Lamia Tchoketch-Kebir, Olga Yuryevich, Michael Gordon, and Sorin P. Voinigescu  

E-Print Network [OSTI]

-Kebir, Olga Yuryevich, Michael Gordon, and Sorin P. Voinigescu Edward S. Rogers Sr. Department of Electrical]-[5]. Modeling accuracy of inductors at mm-waves using the ASITIC software [6], verified in previously fabricated

Voinigescu, Sorin Petre

354

Gold Provenance Studies for Romanian Archaeological Objects Using Micro-SR-XRF  

SciTech Connect (OSTI)

Studies by Synchrotron Radiation--X-Ray Fluorescence (SR-XRF) for the search of the presence of trace elements like Sb, Sn, Te and Pb in archaeological metallic objects found on the territory of Romania--old coins and Bronze Age jewelry, aimed to determine the provenance of the gold used in their manufacture. The results are compared with the detailed elemental composition of alluvial or primary gold samples, obtained by the same technique. This work attempted to establish the origin of the gold used for the mint of two different types of koson coins. We found that the kosons with monogram are made of refined gold, while the one used for the kosons without monogram is mainly alluvial. The gold used in the manufacture of the Calarasi Vulchitrun-type disk and the Tauteu hair ring is also of alluvial origin.

Vasilescu, Angela; Constantinescu, Bogdan; Bugoi, Roxana [Department of Applied Nuclear Physics, Horia Hulubei National Institute of Nuclear Physics and Engineering, P O Box MG-6, Bucharest, Magurele 077125 (Romania); Radtke, Martin; Reinholz, Uwe [BAM Federal Institute for Materials Research and Testing, Richard - Willstaetter Strasse 11, Berlin, D- 12489 (Germany); Simon, Rolf [Institute for Synchrotron Radiation, Forschungszentrum Karlsruhe, Eggenstein, D-76344 (Germany)

2010-04-06T23:59:59.000Z

355

INTERFACE DISORDER CONTROLLED SUPERCONDUCTIVITY YBa2Cu3O7 / SrTiO3 SUPERLATTICES  

SciTech Connect (OSTI)

We report on the coherent growth of ultrathin YBa2Cu3O7 (YBCO) layers on SrTiO3 (STO) in YBCO/STO superlattices. The termination plane of the STO is TiO2 and the CuO chains are missing at the interface. Disorder (steps) at the STO interface cause alterations of the stacking sequence of the intra-cell YBCO atomic layers. Stacking faults give rise to antiphase boundaries which break the continuity of the CuO2 planes and depress superconductivity. We show that superconductivity is directly controlled by interface disorder outlining the importance of pair breaking and localization by disorder in ultrathin layers.

Garcia-Barriocanal, Javier [Universidad Complutense, Spain; Rivera-Calzada, Alberto [Universidad Complutense, Spain; Sefrioui, Z. [Universidad Complutense, Spain; Arias, D [Universidad Complutense, Spain; Varela del Arco, Maria [ORNL; Leon, C. [Universidad Complutense, Spain; Pennycook, Stephen J [ORNL; Santamaria, J. [Universidad Complutense, Spain

2013-01-01T23:59:59.000Z

356

Performance studies of the ATLAS transition radiation tracker barrel using SR1 cosmics data  

E-Print Network [OSTI]

The ATLAS experiment at the Large Hadron Collider (LHC) is designed to measure Nature at the energy scale often associated with electroweak symmetry breaking. When it comes online in 2008, the LHC and ATLAS will work to discover, among other things, the Higgs boson and any other signatures for physics beyond the Standard Model. As part of the ATLAS Inner Detector, the Transition Radiation Tracker will be an important part of ATLAS’s ability to make precise measurements of particle properties. This paper summarizes work done to study and categorize the performance of the TRT, using a combination of cosmic ray test data from the SR1 facility and Monte Carlo. In general, it was found that the TRT is working well, with module-level eciencies around 90 % and module-level noise just above 2 %. Reasonably good agreement was observed with Monte Carlo, though there are some apparently pathological dierences between the two that deserve further attention.

Wall, R

357

Adsorption and Reaction of CO and CO{sub 2} on Oxidized and Reduced SrTiO{sub 3} (100) Surfaces  

SciTech Connect (OSTI)

The adsorption and reaction of CO and CO{sub 2} on oxidized and reduced SrTiO{sub 3}(100) surfaces have been studied using temperature programmed desorption (TPD) and x-ray photoelectron spectroscopy (XPS). XPS results indicate that the fully oxidized and vacuum annealed SrTiO{sub 3}(100) surfaces are nearly defect-free with predominantly Ti{sup 4+} ions whereas the sputter-reduced surfaces contain substantial amounts of defects ({approx} 40% reduced Ti sites). Both CO and CO{sub 2} are found to adsorb weakly on the oxidized SrTiO{sub 3}(100) surfaces. The desorption activation energies of CO and CO{sub 2} from the oxidized SrTiO{sub 3}(100) surfaces are 38 and 32 kJmol{sup -1}, respectively, following adsorption at 110 K. On sputter-reduced surfaces, enhanced reactivity of CO and CO{sub 2} is observed due to the presence of oxygen vacancy sites, causing dissociative adsorption of these molecules. Our studies indicate that CO and CO{sub 2} molecules exhibit relatively weaker binding to SrTiO{sub 3}(100) compared with TiO{sub 2}(110) and TiO{sub 2}(100) surfaces. These differences in reactivity can be attributed primarily to the influence of the Sr cations on the electronic structure of the mixed oxide of SrTiO{sub 3}.

Azad, Samina; Engelhard, Mark H.; Wang, Li Q.

2005-05-26T23:59:59.000Z

358

Sr{sub 2}MgMoO{sub 6??} thin films fabricated using pulsed-laser deposition with high concentrations of oxygen vacancies  

SciTech Connect (OSTI)

We fabricated epitaxial thin films of oxygen-vacant Sr{sub 2}MgMoO{sub 6??} using pulsed laser deposition. The films showed low resistivity of the order of 10{sup ?2} ??cm at 300?K. X-ray diffraction analyses revealed that Mg and Mo ions in the Sr{sub 2}MgMoO{sub 6??} films were considerably disordered, compared to those in bulk Sr{sub 2}MgMoO{sub 6??}. The proportion of oxygen vacancies estimated through hard x-ray photoemission measurements was as large as 0.37, and correlated well with the Mg/Mo ordering.

Shigematsu, K. [Department of Chemistry, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033 (Japan); Chikamatsu, A., E-mail: chikamatsu@chem.s.u-tokyo.ac.jp; Fukumura, T. [Department of Chemistry, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033 (Japan); JST-CREST, Bunkyo-ku, Tokyo 113-0033 (Japan); Toyoda, S. [Department of Materials Science and Engineering, Kyoto University, Yoshida-honmachi, Kyoto 606-8501 (Japan); Ikenaga, E. [JASRI/SPring-8, Mikazuki-cho, Hyogo 679-5198 (Japan); Hasegawa, T. [Department of Chemistry, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033 (Japan); JST-CREST, Bunkyo-ku, Tokyo 113-0033 (Japan); Kanagawa Academy of Science and Technology (KAST), Kawasaki, Kanagawa 213-0012 (Japan)

2014-06-30T23:59:59.000Z

359

Targeting of Osseous Sites with Alpha-emitting Ra-223: Comparison with the Beta-emitter Sr-89 in Mice  

SciTech Connect (OSTI)

The bone-seeking property of and the potential to irradiate red marrow by the alpha-particle emitter Ra-223 (t1/2 = 11.43 d) were compared to those of the beta-emitter Sr-89 (t1/2 = 50.53 d). Methods: The biodistributions of Ra-223 and Sr-89 were studied in mice. Tissue uptakes were determined at 1 h, 6 h, 1 d, 3 d, and 14 d after intravenous administration. The potential redistribution of progeny from Ra-223 located in bone was investigated. Radiation absorbed doses were calculated for soft tissues and bone. Doses were also estimated for marrow-containing cavities assuming spheric geometries. Results: We found that both Sr-89 and Ra-223 selectively concentrated on bone surfaces relative to soft tissues. The measured bone uptake of Ra-223 was slightly higher than that of Sr-89. At the 24 h time-point, the femur uptake of Ra-223 was 40.1% of the administered activity per gram tissue. The uptake in spleen and most other soft tissues was higher for Ra-223 than for Sr-89. We observed rapid clearance of Ra-223 from soft tissues within the first 24 hours, but the bone surface uptake of Ra-223 increased with time up to 24 h. Among the soft tissues, the spleen had the greatest accumulation and retention of Ra-223. The femur-to-spleen ratio increased with time, from 6.4 at 6 h to 23.7 at 3 days after injections. We found little redistribution of Ra-223 daughter products away from bone (about 2% at 6 h and less than 1% detectable at 3 d). Estimates of dose to marrow-containing cavities showed that the Ra-223 alpha-emitter might have a marrow-sparing advantage compared to beta-emitters due to high linear-energy-transfer and short alpha range targeting osteoid surfaces. The alpha-emitters irradiate a smaller fraction of the marrow-containing volumes--sparing marrow and enhancing survival of marrow cells. At the same time, the bone surfaces receives a therapeutically effective radiation dose. Conclusion: The results of this study indicate that Ra-223 is a promising candidate for high linear-energy-transfer alpha-particle irradiation of cancer cells on bone surfaces. Radium-223 can, together with its daughter radionuclides, deliver an intense and highly localized field of radiation to bone surfaces with substantially less irradiation of healthy bone marrow dose compared to standard, bone-seeking beta-emitters such as Sr-89.

Henriksen, Gjermund; Fisher, Darrell R.; Roeske, John C.; Bruland, Oyvind S.; Larsen, Roy H.

2003-05-16T23:59:59.000Z

360

Structure and optical properties of a noncentrosymmetric borate RbSr{sub 4}(BO{sub 3}){sub 3}  

SciTech Connect (OSTI)

A new noncentrosymmetric borate, RbSr{sub 4}(BO{sub 3}){sub 3} (abbreviated as RSBO), has been grown from Rb{sub 2}O--B{sub 2}O{sub 3}--RbF flux and its crystal structure was determined by single crystal x-ray diffraction. It crystallizes in space group Ama2 with cell parameters of a=11.128(10) A, b=12.155(15) A, c=6.952(7) A, Z=4. The basic structural units are isolated planar BO{sub 3} groups. Second harmonic generation (SHG) test of the title compound by the Kurtz-Perry method shows that RSBO can be phase matchable with an effective SHG coefficient about two-thirds as large as that of KH{sub 2}PO{sub 4} (KDP). Finally, based on the anionic group approximation, the optical properties of the title compound are compared with those of the structure-related apatite-like compounds with the formula 'A{sub 5}(TO{sub n}){sub 3}X'. - Graphical abstract: RbSr{sub 4}(BO{sub 3}){sub 3} and some other borate NLO compounds, namely Ca{sub 5}(BO{sub 3}){sub 3}F RCa{sub 4}(BO{sub 3}){sub 3}O (R=Y or Gd) and Na{sub 3}La{sub 2}(BO{sub 3}){sub 3} can be viewed as the derivatives of apatite. They have similar formula composed of five cations and three anion groups (we call them 5/3 structures). The detailed SHG coefficients and optical properties of the apatite-like NLO crystals were compared and summarized. Highlights: Black-Right-Pointing-Pointer A new noncentrosymmetric borate RbSr{sub 4}(BO{sub 3}){sub 3} was grown from flux. Black-Right-Pointing-Pointer The RbSr{sub 4}(BO{sub 3}){sub 3} can be viewed as a derivative of the apatite-like structure. Black-Right-Pointing-Pointer The structure and its relationship to the optical properties of RbSr{sub 4}(BO{sub 3}){sub 3} are compared with other NLO crystals with apatite-like structures. Black-Right-Pointing-Pointer The basic structural units are the planar BO{sub 3} groups in the structure. Black-Right-Pointing-Pointer Second harmonic generation (SHG) test shows that RbSr{sub 4}(BO{sub 3}){sub 3} can be phase matchable with an effective SHG coefficient about two-thirds as large as that of KH{sub 2}PO{sub 4}.

Xia, M.J. [Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (China); Li, R.K., E-mail: rkli@mail.ipc.ac.cn [Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)

2013-01-15T23:59:59.000Z

Note: This page contains sample records for the topic "js rogers sr" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Hanford 100N Area Apatite Emplacement: Laboratory Results of Ca-Citrate-PO4 Solution Injection and Sr-90 Immobilization in 100N Sediments  

SciTech Connect (OSTI)

This report summarizes laboratory scale studies investigating the remediation of Sr-90 by Ca-citrate-PO4 solution injection/infiltration to support field injection activities in the Hanford 100N area. This study is focused on experimentally testing whether this remediation technology can be effective under field scale conditions to mitigate Sr-90 migration 100N area sediments into the Columbia River. Sr-90 is found primarily adsorbed to sediments by ion exchange (99% adsorbed, < 1% in groundwater) in the upper portion of the unconfined aquifer and lower vadose zone. Although primarily adsorbed, Sr-90 is still considered a high mobility risk as it is mobilized by seasonal river stage increases and by plumes of higher ionic strength relative to groundwater. This remediation technology relies upon the Ca-citrate-PO4 solution forming apatite precipitate [Ca6(PO4)10(OH)2], which incorporates some Sr-90 during initial precipitation and additionally slowly incorporates Sr-90 by solid phase substitution for Ca. Sr substitution occurs because Sr-apatite is thermodynamically more stable than Ca-apatite. Once the Sr-90 is in the apatite structure, Sr-90 will decay to Y-90 (29.1 y half-life) then Zr-90 (64.1 h half-life) without the potential for migration into the Columbia River. For this technology to be effective, sufficient apatite needs to be emplaced in sediments to incorporate Sr and Sr-90 for 300 years (~10 half-lives of Sr-90), and the rate of incorporation needs to exceed the natural groundwater flux rate of Sr in the 100N area. A primary objective of this study is to supply an injection sequence to deliver sufficient apatite into subsurface sediments that minimizes initial mobility of Sr-90, which occurs because the injection solution has a higher ionic strength compared to groundwater. This can be accomplished by sequential injections of low, then high concentration injection of Ca-citrate-PO4 solutions. Assessment of low concentration Ca-citrate-PO4, citrate-PO4, and PO4 solutions show greater Sr and Sr-90 incorporation during initial precipitation and less initial mobilization with solutions with low Ca2+ concentration. While all solutions showed nearly the same Sr uptake into apatite (14 to 17% by 2 weeks, 21% to 30% by 5 weeks), the incorporation efficiency (i.e., mM Sr incorporated per mM PO4 injected) was higher for solutions containing citrate. The Sr incorporation rate into apatite during initial precipitation (by 1 month) averaged 4.64 ± 1.9 x 10-4 h-1 (half-life 1500 ± 430 h, 8.85 x 10-7 mg Sr/day/mg apatite). The injection solution used in field injections #3 to #18 (10 mM PO4, 1 mM Ca, 2.5 mM citrate), which is deficient in Ca (a total of 16.7 mM needed to form apatite with 10 mM of PO4), resulted in the initial Sr and Ca peak (24 h) at 4.7x groundwater. By 30 days, the aqueous Sr concentration was 0.28x groundwater and Ca 0.43x groundwater, as both Sr and Ca are used to form initial apatite precipitates. Reactive transport simulation of the complex ion exchange, biodegradation, and precipitation processes showed that the initial Sr groundwater increase mobilized only 1.5% of the Sr mass in sediments. Citrate biodegradation, a necessary step in Ca-citrate-PO4 solutions forming apatite, had an average half-life of 50 h (at aquifer sediment/water ratio and temperature), and decreased an order of magnitude with sediment depth as the microbial biomass decreased five orders of magnitude. The rate of citrate biodegradation was relatively invariant with biomass and water saturation (50% to 100%, for vadose zone infiltration) possibly due to significant microbial injection using river water and subsurface microbial mobilization.

Szecsody, James E.; Burns, Carolyn A.; Moore, Robert C.; Fruchter, Jonathan S.; Vermeul, Vincent R.; Williams, Mark D.; Girvin, Donald C.; McKinley, James P.; Truex, Michael J.; Phillips, Jerry L.

2007-10-01T23:59:59.000Z

362

Improvement of La0.65Sr0.3MnO3-gamma-YSZ cathodes by infiltrating nanoSm0.6Sr0.4CoO3-gamma particles  

SciTech Connect (OSTI)

La0.65Sr0.3MnO3-delta-YSZ cathodes are infiltrated with Sm0.6Sr0.4CoO3-delta (SSC) at 800 C using a precipitation method. The effect of SSC infiltration has been characterized for symmetric cells and single cells at reduced temperatures. With SSC addition the cathode polarization resistance, determined from symmetric-cell measurements, significantly decreases: from approx. 19.8 to 8.5 Omega cdot cm2 at 600 C, and from 7.7 to 3.3 Omega cdot cm2 at 650 C. Consequently, the single-cell performance with 97 percentH2+3 percentH2O fuel is dramatically improved, which may be attributed to the superior electrocatalytic activity of SSC in the cathodes.

Lu, Chun; Sholklapper, Tal; Chen, Xuan; Zhang, Xiaofeng; Jacobson, Craig P.; Visco, Steven J.; DeJonghe, Lutgard C.

2004-05-01T23:59:59.000Z

363

Exchange integrals in magnetoelectric hexagonal ferrite (SrCo{sub 2}Ti{sub 2}Fe{sub 8}O{sub 19}): A density functional study  

SciTech Connect (OSTI)

The exchange integrals in magnetoelectric hexagonal ferrite SrCo{sub 2}Ti{sub 2}Fe{sub 8}O{sub 19} have been calculated by using density functional theory. To get 10 inter-sublattice and 3 intra-sublattice exchange integrals, the electronic structures and total energies of 20 spin arrangements have been calculated with General Gradient Approximation (GGA) + U method. The dependence of exchange integrals on U has been studied. The comparison between the exchange integrals in SrFe{sub 12}O{sub 19} and those in SrCo{sub 2}Ti{sub 2}Fe{sub 8}O{sub 19} shows that substitution of Co and Ti decreases the most interactions involving the 12?k sites. The investigation based on our exchange integrals indicates that magnetic interaction between R and S blocks reduces significantly in SrCo{sub 2}Ti{sub 2}Fe{sub 8}O{sub 19}.

Feng, Min [School of Physics, Nankai University, Tianjin 300071 (China); Shao, Bin [Department of Physics, Tsinghua University, Beijing 100084 (China); Lu, Yuan; Zuo, Xu, E-mail: xzuonku@gmail.com [College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071 (China)

2014-05-07T23:59:59.000Z

364

Tissue specific regulation of the high density lipoprotein (HDL) receptor, scavenger receptor Class B, Type I (SR-BI) by the scaffold protein PDZK1  

E-Print Network [OSTI]

PDZK1 is a four PDZ-domain containing cytoplasmic adaptor protein that binds the Cterminus of the high-density lipoprotein (HDL) receptor SR-BI. Abolishing PDZK1 expression in PDZK1 knockout (KO) mice leads to a ...

Fenske, Sara Anne

2008-01-01T23:59:59.000Z

365

Development of Dodecaniobate Keggin Chain Materials as Alternative Sorbents for SR and Actinide Removal from High-Level Nuclear Waste Solutions  

SciTech Connect (OSTI)

The current baseline sorbent (monosodium titanate) for Sr and actinide removal from Savannah River Site's high level wastes has excellent adsorption capabilities for Sr but poor performance for the actinides. We are currently investigating the development of alternative materials that sorb radionuclides based on chemical affinity and/or size selectivity. The polyoxometalates, negatively-charged metal oxo clusters, have known metal binding properties and are of interest for radionuclide sequestration. We have developed a class of Keggin-ion based materials, where the Keggin ions are linked in 1- dimensional chains separated by hydrated, charge-balancing cations. These Nb-based materials are stable in the highly basic nuclear waste solutions and show good selectivity for Sr and Pu. Synthesis, characterization and structure of these materials in their native forms and Sr-exchanged forms will be presented.

Nyman, May; Bonhomme, Francois

2004-03-28T23:59:59.000Z

366

Structural properties of SrO thin films grown by molecular beam epitaxy on LaAlO{sub 3} substrates  

SciTech Connect (OSTI)

SrO films were grown on LaAlO{sub 3} substrates by molecular beam epitaxy and characterized using reflection high-energy electron diffraction (RHEED) and x-ray diffraction (XRD). The evolution of the RHEED pattern is discussed as a function of film thickness. 500 A thick SrO films were relaxed and exhibited RHEED patterns indicative of an atomically smooth surface having uniform terrace heights. Films had the epitaxial relationship (001){sub SrO}(parallel sign)(001){sub LaAlO{sub 3}}; [010]{sub SrO}(parallel sign)[110]{sub LaAlO{sub 3}}. This 45 deg. in-plane rotation minimizes mismatch and leads to films of high crystalline quality, as verified by Kikuchi lines in the RHEED patterns and narrow rocking curves of the (002) XRD peak.

Maksimov, O.; Heydemann, V. D.; Fisher, P.; Skowronski, M.; Salvador, P. A. [Electro-Optics Center, Pennsylvania State University, Freeport, Pennsylvania 16229 (United States); Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States)

2006-12-25T23:59:59.000Z

367

Neutron Scattering Study of Charge-Ordering in R1/3Sr2/3FeO3(R=La, Pr, Nd, Sm, and Y).  

E-Print Network [OSTI]

??The series of compounds R1/3Sr2/3FeO3 (R = La, Pr, Nd, and Sm) undergo a Verwey transition along with an antiferromagnetic ordering of Fe spins as… (more)

Ma, Jie

2010-01-01T23:59:59.000Z

368

THE TEMPERATURE-DEPENDENT SURFACE STRUCTURE, COMPOSITION AND ELECTRONIC PROPERTIES OF THE CLEAN SrTiO3(111) CRYSTAL FACE: LEED, AES, ELS AND UPS STUDIES  

E-Print Network [OSTI]

CRYSTAL.FACE: LEED, AES, ELS AND UPS STUDIES Wei Jen Lo andtaken Fig. cont'd. Fig. 9. The UPS spectrum of the Ar ionclean SrTi03 surface Fig. 10. The UPS spectrum of the clean,

Lo, Wei Jen

2011-01-01T23:59:59.000Z

369

137Cs(90Sr) and Pu isotopes in the Pacific Ocean sources & trends  

SciTech Connect (OSTI)

The main source of artificial radioactivity in the world`s oceans can be attributed to worldwide fallout from atmospheric nuclear weapons testing. Measurements of selected artificial radionuclides in the Pacific Ocean were first conducted in the 1960`s where it was observed that fallout radioactivity had penetrated the deep ocean. Extensive studies carried out during the 1973-74 GEOSECS provided the first comprehensive data on the lateral and vertical distributions of {sup 9O}Sr, {sup 137}Cs and Pu isotopes in the Pacific on a basin wide scale. Estimates of radionuclide inventories in excess of amounts predicted to be delivered by global fallout alone were attributed to close-in fallout and tropospheric inputs from early U.S. tests conducted on Bikini and Enewetak Atolls in the Equatorial Pacific. In general, levels of fallout radionuclides (including {sup 9O}Sr, {sup 137}Cs and Pu isotopes) in the surface waters of the Pacific Ocean have decreased considerably over the past 4 decades and are now much more homogeneously distributed. Resuspension and the subsequent deposition of fallout radionuclides from previously deposited debris on land has become an important source term for the surface ocean. This can be clearly seen in measurements of fallout radionuclides in mineral aerosols over the Korean Peninsula (Yellow dust events). Radionuclides may also be transported from land to sea in river runoff-these transport mechanisms are more important in the Pacific Ocean where large quantities of river water and suspended sands/fluvial sediments reach the coastal zone. Another unique source of artificial radionuclides in the Pacific Ocean is derived from the slow resolubilization and transport of radionuclides deposited in contaminated lagoon and slope sediments near U.S. and French test sites. Although there is a small but significant flux of artificial radionuclides depositing on the sea floor, > 80% of the total 239, {sup 240}Pu inventory and > 95% of the total {sup 137}Cs inventory remains in the water column. Studies conducted through the 1980`s appear to be consistent with earlier findings and indicate that radionuclide inventories in mid-northern latitudes are at least a factor of two above those expected from global fallout alone. The long term persistence of close-in and/or stratospheric fallout from nuclear weapons testing in the Marshall Islands still appears to be the only plausible explanation for this anomaly.

Hamilton, T.F., Millies-Lacrox, J.C. [Service Mixte de Securite Radologique, Mondhery (France); Hong, G.H. [Korea Ocean Research and Development Institute, Ansan (Korea)

1996-11-01T23:59:59.000Z

370

Neutron powder diffraction study of phase transitions in Sr{sub 2}SnO{sub 4}  

SciTech Connect (OSTI)

The phase transitions in Sr{sub 2}SnO{sub 4} at high temperature have been studied using high resolution time-of-flight powder neutron diffraction. The room temperature structure of Sr{sub 2}SnO{sub 4} is orthorhombic (Pccn), which can be derived from the tetragonal K{sub 2}NiF{sub 4} structure by tilting the SnO{sub 6} octahedra along the tetragonal [100]{sub T}- and [010]{sub T}-axes with non-equal tilts. At the temperature of about 423K, it transforms to another orthorhombic structure (Bmab) characterized by the SnO{sub 6} octahedral tilt around the [110]{sub T}-axis. At still higher temperatures ({approx}573K) the structure was found to be tetragonal K{sub 2}NiF{sub 4}-type (I4/mmm)

Fu, W.T. [Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden (Netherlands)]. E-mail: w.fu@chem.leidenuniv.nl; Visser, D. [NWO-Physics, ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX (United Kingdom); Knight, K.S. [ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX (United Kingdom); IJdo, D.J.W. [Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden (Netherlands)

2004-11-01T23:59:59.000Z

371

Interplay of point defects, biaxial strain, and thermal conductivity in homoepitaxial SrTiO{sub 3} thin films  

SciTech Connect (OSTI)

Separating out effects of point defects and lattice strain on thermal conductivity is essential for improvement of thermoelectric properties of SrTiO{sub 3}. We study relations between defects generated during deposition, induced lattice strain, and their impact on thermal conductivity {kappa} in homoepitaxial SrTiO{sub 3} films prepared by ion-beam sputtering. Lowering the deposition temperature gives rise to lattice expansion by enhancement of point defect density which increases the hardness of the films. Due to a fully coherent substrate-film interface, the lattice misfit induces a large biaxial strain. However, we can show that the temperature dependence of {kappa} is mainly sensitive on the defect concentration.

Wiedigen, S.; Kramer, T.; Knorr, I.; Nee, N.; Hoffmann, J.; Volkert, C. A.; Jooss, Ch. [University of Goettingen, Institute of Materials Physics, Friedrich-Hund-Platz 1, 37077 Goettingen (Germany); Feuchter, M.; Kamlah, M. [Karlsruhe Institute of Technology, Institute for Applied Materials, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen (Germany)

2012-02-06T23:59:59.000Z

372

Total energy study of the microscopic structure and electronic properties of tetragonal perovskite SrTiO{sub 3}  

SciTech Connect (OSTI)

To study the structural and electronic properties of cubic perovskite SrTiO{sub 3} and its stress-induced tetragonal phase, we have performed total energy calculations and studied the effect of oxygen vacancies on the electronic properties of tetragonal perovskite SrTiO{sub 3}. The method used was the relativistic full-potential linearized augmented plane wave (FLAPW) method. To obtain the geometry that minimizes the total energy, we relaxed the internal atomic sites of the tetragonal cell. As a result of this procedure, we have found that the titanium atoms move toward the plane of the vacancy by 0.03 Å, and the apical oxygen atoms move to the same plane by approximately 0.14 Å. These results are discussed in comparison with experimental data.

Rubio-Ponce, A. [Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana-Azcapotzalco, Av. San Pablo 180, 02200 México, D.F. (Mexico); Olguín, D. [Departamento de Física, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, A.P. 14740, México, D.F. (Mexico)

2014-05-15T23:59:59.000Z

373

New neutron capture and total cross section measurements on {sup 88}Sr and their impact on s-process nucleosynthesis  

SciTech Connect (OSTI)

The authors have made new and improved measurements of the neutron capture and total cross sections of {sup 88}Sr at the Oak Ridge Electron Linear Accelerator (ORELA). Improvements over previous measurements include a wider incident neutron energy range, the use of metallic rather than carbonate samples, better background subtraction, reduced sensitivity to sample-dependent backgrounds, and better pulse-height weighting functions. Because of its small cross section, the {sup 88}Sr(n,{gamma}) reaction is an important bottleneck during the s-process nucleosynthesis. Hence, an accurate determination of this rate is needed to better constrain the neutron exposure in s-process models and to more fully exploit the recently discovered isotopic anomalies in certain meteorites. They describe the experimental procedures, compare the results to previous data, and discuss their astrophysical impact.

Koehler, P.E.; Spencer, R.R.; Guber, K.H. [and others

1998-11-01T23:59:59.000Z

374

Role of oxygen vacancies in resistive switching in Pt/Nb-doped SrTiO{sub 3}  

SciTech Connect (OSTI)

Oxygen vacancies at the metal/oxide interface, driven by an electric field, have been considered responsible for the switching to the low-resistance state. We studied the electrical properties, along with microscopic observations, of the Pt/Nb-doped SrTiO{sub 3} (001) single-crystal system. Electron energy loss spectroscopy revealed highly accumulated oxygen vacancies at the interface in the high-resistance state, contrasting to common explanation. Higher resistance state by more oxygen vacancies was further confirmed in Pt/H{sub 2}-annealed SrTiO{sub 3}. These results suggest the presence of an interfacial state which dominantly determined the resistivity by changing the barrier height at the interface.

Park, Jinho; Kwon, Deok-Hwang; Park, Hongwoo; Kim, M., E-mail: mkim@snu.ac.kr [Research Institute of Advanced Materials, Department of Material Science and Engineering, Seoul National University, Seoul 151-744 (Korea, Republic of); Jung, C. U. [Department of Physics, Hankuk University of Foreign Studies, Yongin, Kyungki 449-791 (Korea, Republic of)

2014-11-03T23:59:59.000Z

375

Kinetics of fuel particle weathering and {sup 90}Sr mobility in the Chernobyl 30-km exclusion zone  

SciTech Connect (OSTI)

Weathering of fuel particles and the subsequent leaching of radionuclides causes {sup 90}Sr mobility in Chernobyl soils to increase with time after disposition. Studies of {sup 90}Sr speciation in soils collected in 1995 and 1996 from the Chernobyl 30-km exclusion zone have been used to calculate rates of fuel particles dissolution under natural environmental conditions. Results show that the velocity of fuel particle dissolution is primarily dependent on the physico-chemical characteristics of the particles and partially dependent on soil acidity. Compared to other areas, the fuel particle dissolution rate is significantly lower in the contaminated areas to the west of the Chernobyl reactor where deposited particles were presumably not oxidized prior to release. The data have been used to derive mathematical models that describe the rate of radionuclide leaching from fuel particles in the exclusion zone and changes in soil-to-plant transfer as a function of particle type and soil pH.

Kashparov, V.A.; Zvarich, S.I.; Protsak, V.P.; Levchuk, S.E. [Ukrainian Inst. of Agricultural Radiology, Kiev (Ukraine); Oughton, D.H. [NLH, Aas (Norway). Lab. for Analytical Chemistry

1999-03-01T23:59:59.000Z

376

The crystal structure and magnetic properties of Ba{sub 2?x}Sr{sub x}Co{sub 2}Fe{sub 12}O{sub 22}  

SciTech Connect (OSTI)

We have synthesized the Ba{sub 2?x}Sr{sub x}Co{sub 2}Fe{sub 12}O{sub 22} samples (x?=?0.1, 0.2, 0.3, 0.4, 0.5) by the solid-state reaction method and investigated their crystalline and magnetic properties by X-ray diffractometer (XRD), Mössbauer spectrometer, vibrating sample magnetometer, and network analyzer. XRD patterns show that all samples are rhombohedral with space group R-3m. The lattice constants a{sub 0} and c{sub 0} decrease with Sr substitution due to smaller ion radius of Sr{sup 2+} (1.27?Å) than that of Ba{sup 2+} (1.43?Å). The Mössbauer spectroscopy measurements show that the relative area ratios of Fe ion were maintained constant regardless of the Sr concentration. However, average magnetic hyperfine field slightly increased with the Sr concentration. This observation agrees with the fact that the saturation magnetization (M{sub s}) linearly increases due to the increasing super-exchange interaction, originated from the difference in the ionic radius between Ba{sup 2+} and Sr{sup 2+}. To investigate its properties at high frequency range, all samples were sintered at 1100?°C, and complex permeability and permittivity were measured by network analyzer between 100?MHz and 4?GHz. For x below 0.3, the initial permeability at 100?MHz increases, at higher values of x, its value decreases. Our study shows that magnetic properties of Sr{sup 2+} substitution for Ba{sup 2+} in Y-type hexaferrite as well as low magnetic loss less than 0.1 in 1?GHz band, indicating the potential application of Ba{sub 2?x}Sr{sub x}Co{sub 2}Fe{sub 12}O{sub 22} samples for RF and antenna devices in ultra high frequency band.

Cho, Kwang Lae; Rhee, Chan Hyuk; Kim, Chul Sung, E-mail: cskim@kookmin.ac.kr [Department of Physics, Kookmin University, Seoul 136-702 (Korea, Republic of)

2014-05-07T23:59:59.000Z

377

ccsd-00004957,version1-23May2005 Hole redistribution in Sr14-xCaxCu24O41 (x=0, 12) spin ladder compounds: 63  

E-Print Network [OSTI]

ccsd-00004957,version1-23May2005 Hole redistribution in Sr14-xCaxCu24O41 (x=0, 12) spin ladder-xCaxCu24O41 (x=0 and 12) performed under ambient and high pressures. NMR data show that the hole two-leg ladders Sr14-xCaxCu24O41 (Cax) have been intensively in- vestigated over the last years due

Boyer, Edmond

378

Chemical expansion of La0.8Sr0.2Fe0.7Ga0.3O3-Olivier Valentina  

E-Print Network [OSTI]

1/26 Chemical expansion of La0.8Sr0.2Fe0.7Ga0.3O3- Olivier Valentina , Francis Millotb , Ã?ric: This paper deals with the chemical expansion measurements and modelling of La0.8Sr0.2Fe0.7Ga0.3O3 for lanthanum ferrite oxides, chemical expansion depends linearly on the Fe4+ concentration rather than

Paris-Sud XI, Université de

379

MICROSTRUCTURE STUDY ON THE La0.7Sr0.3MnO3 AND RARE-EARTH OXIDE VERTICALLY ALIGNED NANOCOMPOSITE THIN FILMS  

E-Print Network [OSTI]

Two-phase (La0.7Sr0.3MnO3)0.5:(CeO2)0.5 (LSMO:CeO2) heteroepitaxial nanocomposite films were grown on SrTiO3 (STO) (001) by pulsed laser deposition. XRD and TEM results show that LSMO:CeO2 films epitaxially grow on STO as self-assembled vertically...

Hazariwala, Harshad

2011-05-05T23:59:59.000Z

380

IDENTIFICATION OF AN {sup 84}Sr-DEPLETED CARRIER IN PRIMITIVE METEORITES AND IMPLICATIONS FOR THERMAL PROCESSING IN THE SOLAR PROTOPLANETARY DISK  

SciTech Connect (OSTI)

The existence of correlated nucleosynthetic heterogeneities in solar system reservoirs is now well demonstrated for numerous nuclides. However, it has proven difficult to discriminate between the two disparate processes that can explain such correlated variability: incomplete mixing of presolar material or secondary processing of a well-mixed disk. Using stepwise acid-leaching of the Ivuna CI-chondrite, we show that unlike other nuclides such as {sup 54}Cr and {sup 50}Ti, Sr-isotope variability is the result of a carrier depleted in {sup 84}Sr. The carrier is most likely presolar SiC, which is known to have both high Sr-concentrations relative to solar abundances and extremely depleted {sup 84}Sr compositions. Thus, variability in {sup 84}Sr in meteorites and their components can be attributed to varying contributions from presolar SiC. The observed {sup 84}Sr excesses in calcium-aluminum refractory inclusions (CAIs) suggest their formation from an SiC-free gaseous reservoir, whereas the {sup 84}Sr depletions present in differentiated meteorites require their formation from material with an increased concentration of SiC relative to CI chondrites. The presence of a positive correlation between {sup 84}Sr and {sup 54}Cr, despite being hosted in carriers of negative and positive anomalies, respectively, is not compatible with incomplete mixing of presolar material but instead suggests that the solar system's nucleosynthetic heterogeneity reflects selective thermal processing of dust. Based on vaporization experiments of SiC under nebular conditions, the lack of SiC material in the CAI-forming gas inferred from our data requires that the duration of thermal processing of dust resulting in the vaporization of CAI precursors was extremely short-lived, possibly lasting only hours to days.

Paton, Chad; Schiller, Martin; Bizzarro, Martin, E-mail: chadpaton@gmail.com, E-mail: schiller@snm.ku.dk, E-mail: bizzarro@snm.ku.dk [Centre for Star and Planet Formation, Natural History Museum of Denmark, University of Copenhagen, Copenhagen DK-1350 (Denmark)

2013-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "js rogers sr" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

December 1999 NREL/SR-520-27666 A.D. Compaan, X. Deng, and R.G. Bohn  

E-Print Network [OSTI]

and Astronomy The University of Toledo Toledo, Ohio High Efficiency Thin Film CdTe and a-Si Based Solar Cells/SR-520-27666 High Efficiency Thin Film CdTe and a-Si Based Solar Cells Annual Technical Report March 4 efficiency CdTe-based thin-film solar cells and on high efficiency a-Si-based thin-film solar cells

Deng, Xunming

382

The role of strontium in the densification of Sr-zeolite-A to the low dielectric ceramic, anorthite  

SciTech Connect (OSTI)

Analysis, using x-ray diffraction and Extended X-ray Absorption Fine Structure Spectroscopy (EXAFS), of the reconstructive transition from strontium exchanged zeolite type-A through amorphous intermediates to Sr-anorthite shows that, although long range order is lost, the environment around strontium remains essentially intact. EXAFS allows the authors to follow the mechanism of the solid state reaction which is dictated by the coordination requirements of strontium.

Parise, J.B.; Corbin, D.R.; Subramanian, M.A. (Du Pont de Nemours (E.I.) and Co., Wilmington, DE (USA). Central Research and Development Dept.)

1989-03-01T23:59:59.000Z

383

Density functional theory study of oxygen and water adsorption on SrTiO3(001)  

E-Print Network [OSTI]

effortlessly leading to the formation of a pair of hydroxyl groups. For the titanium dioxide termina- tionDensity functional theory study of oxygen and water adsorption on SrTiO3(001) D I S S E R TAT I O N and they are computationally feasible. For the oxygen and water adsorption the binding energy is controlled by long-range sur

384

Víctimas y victimarios: Cómplices del discurso del poder en Una noche con el Sr. Magnus e hijos de Ricardo Monti  

E-Print Network [OSTI]

FALL 1989 37 Víctimas y victimarios: Cómplices del discurso del poder en Una noche con el Sr. Magnus e hijos de Ricardo Monti Roberto Previdi Froelich ... porque nunca podemos odiar a las personas que sabemos son capaces de hacer exactamente... a la expresión libre cuyo blanco es supuestamente el mundo creado por Magnus y por lo tanto podría simbolizar una momentaria liberación de la expresión según confirma Gato: "Yo digo lo que piensan" (9). Este discurso desata las zonas tabúes (la...

Previdi Froelich, Roberto

1989-10-01T23:59:59.000Z

385

ASSESSMENT OF 90SR AND 137CS PENETRATION INTO REINFORCED CONCRETE (EXTENT OF 'DEEPENING') UNDER NATURAL ATMOSPHERIC CONDITIONS  

SciTech Connect (OSTI)

When assessing the feasibility of remediation following the detonation of a radiological dispersion device or improvised nuclear device in a large city, several issues should be considered including the levels and characteristics of the radioactive contamination, the availability of resources required for decontamination, and the planned future use of the city's structures and buildings. Currently, little is known about radionuclide penetration into construction materials in an urban environment. Knowledge in this area would be useful when considering costs of a thorough decontamination of buildings, artificial structures, and roads in an affected urban environment. Pripyat, a city substantially contaminated by the Chernobyl Nuclear Power Plant accident in April 1986, may provide some answers. The main objective of this study was to assess the depth of {sup 90}Sr and {sup 137}Cs penetration into reinforced concrete structures in a highly contaminated urban environment under natural weather conditions. Thirteen reinforced concrete core samples were obtained from external surfaces of a contaminated building in Pripyat. The concrete cores were drilled to obtain sample layers of 0-5, 5-10, 10-15, 15-20, 20-30, 30-40, and 40-50 mm. Both {sup 90}Sr and {sup 137}Cs were detected in the entire 0-50 mm profile of the reinforced cores sampled. In most of the cores, over 90% of the total {sup 137}Cs inventory and 70% of the total {sup 90}Sr inventory was found in the first 0-5 mm layer of the reinforced concrete. {sup 90}Sr had penetrated markedly deeper into the reinforced concrete structures than {sup 137}Cs.

Farfan, E.; Jannik, T.

2011-10-01T23:59:59.000Z

386

Conducting and insulating LaAlO{sub 3}/SrTiO{sub 3} interfaces: A comparative surface photovoltage investigation  

SciTech Connect (OSTI)

Surface photovoltage (SPV) spectroscopy, which is a versatile method to analyze the energetic distribution of electronic defect states at surfaces and interfaces of wide-bandgap semiconductor (hetero-)structures, is applied to comparatively investigate heterostructures made of 5-unit-cell-thick LaAlO{sub 3} films grown either on TiO{sub 2}- or on SrO-terminated SrTiO{sub 3}. As shown in a number of experimental and theoretical investigations in the past, these two interfaces exhibit dramatically different properties with the first being conducting and the second insulating. Our present SPV investigation reveals clearly distinguishable interface defect state distributions for both configurations when interpreted within the framework of a classical semiconductor band scheme. Furthermore, bare SrTiO{sub 3} crystals with TiO{sub 2} or mixed SrO/TiO{sub 2} terminations show similar SPV spectra and transients as do LaAlO{sub 3}-covered samples with the respective termination of the SrTiO{sub 3} substrate. This is in accordance with a number of recent works that stress the decisive role of SrTiO{sub 3} and the minor role of LaAlO{sub 3} with respect to the electronic interface properties.

Beyreuther, E., E-mail: elke.beyreuther@iapp.de; Thiessen, A.; Grafström, S.; Eng, L. M. [Institut für Angewandte Photophysik, Technische Universität Dresden, D-01062 Dresden (Germany); Paparo, D. [CNR-SPIN and Dipartimento di Fisica, Università di Napoli “Federico II,” Compl. Univ. di Monte S. Angelo, via Cintia, I-80126 Napoli (Italy)

2013-12-28T23:59:59.000Z

387

Voltage-controlled ferromagnetism and magnetoresistance in LaCoO{sub 3}/SrTiO{sub 3} heterostructures  

SciTech Connect (OSTI)

A LaCoO{sub 3}/SrTiO{sub 3} heterostructure grown on Si (001) is shown to provide electrically switchable ferromagnetism, a large, electrically tunable magnetoresistance, and a vehicle for achieving and probing electrical control over ferromagnetic behavior at submicron dimensions. Fabrication of devices in a field-effect transistor geometry enables application of a gate bias voltage that modulates strain in the heterostructure via the converse piezoelectric effect in SrTiO{sub 3}, leading to an artificial inverse magnetoelectric effect arising from the dependence of ferromagnetism in the LaCoO{sub 3} layer on strain. Below the Curie temperature of the LaCoO{sub 3} layer, this effect leads to modulation of resistance in LaCoO{sub 3} as large as 100%, and magnetoresistance as high as 80%, both of which arise from carrier scattering at ferromagnetic-nonmagnetic interfaces in LaCoO{sub 3}. Finite-element numerical modeling of electric field distributions is used to explain the dependence of carrier transport behavior on gate contact geometry, and a Valet-Fert transport model enables determination of spin polarization in the LaCoO{sub 3} layer. Piezoresponse force microscopy is used to confirm the existence of piezoelectric response in SrTiO{sub 3} grown on Si (001). It is also shown that this structure offers the possibility of achieving exclusive-NOR logic functionality within a single device.

Hu, Chengqing; Park, Keun Woo; Yu, Edward T. [Microelectronics Research Center, The University of Texas at Austin, 10100 Burnet Rd., Austin, Texas 78758 (United States)] [Microelectronics Research Center, The University of Texas at Austin, 10100 Burnet Rd., Austin, Texas 78758 (United States); Posadas, Agham; Demkov, Alexander A. [Department of Physics, The University of Texas at Austin, 1 University Station C1600, Austin, Texas 78712 (United States)] [Department of Physics, The University of Texas at Austin, 1 University Station C1600, Austin, Texas 78712 (United States); Jordan-Sweet, Jean L. [IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598 (United States)] [IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598 (United States)

2013-11-14T23:59:59.000Z

388

Characterization and Application of Superlig 620 Solid Phase Extraction Resin for Automated Process Monitoring of 90Sr  

SciTech Connect (OSTI)

Characterization of SuperLig® 620 solid phase extraction resin was performed in order to develop an automated on-line process monitor for 90Sr. The main focus was on strontium separation from barium, with the goal of developing an automated separation process for 90Sr in high-level wastes. High-level waste contains significant 137Cs activity, of which 137mBa is of great concern as an interference to the quantification of strontium. In addition barium, yttrium and plutonium were studied as potential interferences to strontium uptake and detection. A number of complexants were studied in a series of batch Kd experiments, as SuperLig® 620 was not previously known to elute strontium in typical mineral acids. The optimal separation was found using a 2M nitric acid load solution with a strontium elution step of ~0.49M ammonium citrate and a barium elution step of ~1.8M ammonium citrate. 90Sr quantification of Hanford high-level tank waste was performed on a sequential injection analysis microfluidics system coupled to a flow-cell detector. The results of the on-line procedure are compared to standard radiochemical techniques in this paper.

Devol, Timothy A.; Clements, John P.; Farawila, Anne F.; O'Hara, Matthew J.; Egorov, Oleg; Grate, Jay W.

2009-11-30T23:59:59.000Z

389

Dependence of Electronic Structure of SrRuO3 and the Degree of Correlation on Cation Off-Stoichiometry  

SciTech Connect (OSTI)

We have grown and studied high quality SrRuO{sub 3} films grown by MBE as well as PLD. By changing the oxygen activity during deposition we were able to make SrRuO{sub 3} samples that were stoichiometric (low oxygen activity) or with ruthenium vacancies (high oxygen activity). Samples with strontium vacancies were found impossible to produce since the ruthenium would precipitate out as RuO{sub 2}. The volume of the unit cell of SrRuO{sub 3} becomes larger as more ruthenium vacancies are introduced. The residual resistivity ratio (RRR) and room temperature resistivity were found to systematically depend on the volume of the unit cell and therefore on the amount of ruthenium vacancies. The RRR varied from {approx}30 for stoichiometric samples to less than two for samples that were very ruthenium poor. The room temperature resistivity varied from 190 {micro}{Omega} cm for stoichoimetric samples to over 300 {micro}{Omega} cm for very ruthenium poor samples. UPS spectra show a shift of weight from the coherent peak to the incoherent peak around the Fermi level when samples have more ruthenium vacancies. Core level XPS spectra of the ruthenium 3d lines show a strong screened part in the case of stoichiometric samples. This screened part disappears when ruthenium vacancies are introduced. Both the UPS and the XPS results are consistent with the view that correlation increases as the amount of ruthenium vacancies increase.

Siemons, W.

2011-08-19T23:59:59.000Z

390

Interstaple Dithiol Cross-Linking in Au(25)(SR)(18) Nanomolecules: A Combined Mass Spectrometric and Computational Study  

SciTech Connect (OSTI)

A systematic study of cross-linking chemistry of the Au{sub 25}(SR){sub 18} nanomolecule by dithiols of varying chain length, HS-(CH2)n-SH where n = 2, 3, 4, 5, and 6, is presented here. Monothiolated Au{sub 25} has six [RSAuSRAuSR] staple motifs on its surface, and MALDI mass spectrometry data of the ligand exchanged clusters show that propane (C3) and butane (C4) dithiols have ideal chain lengths for interstaple cross-linking and that up to six C3 or C4 dithiols can be facilely exchanged onto the cluster surface. Propanedithiol predominately exchanges with two monothiols at a time, making cross-linking bridges, while butanedithiol can exchange with either one or two monothiols at a time. The extent of cross-linking can be controlled by the Au{sub 25}(SR){sub 18} to dithiol ratio, the reaction time of ligand exchange, or the addition of a hydrophobic tail to the dithiol. MALDI MS suggests that during ethane (C2) dithiol exchange, two ethanedithiols become connected by a disulfide bond; this result is supported by density functional theory (DFT) prediction of the optimal chain length for the intrastaple coupling. Both optical absorption spectroscopy and DFT computations show that the electronic structure of the Au{sub 25} nanomolecule retains its main features after exchange of up to eight monothiol ligands.

Jiang, Deen [ORNL; Dass, Amala [University of Mississippi, The; Tschumper, Gregory [University of Mississippi, The; Mattern, Daniell [University of Mississippi, The; Van Dornshuld, Eric [University of Mississippi, The; Kota, Rajesh [University of Mississippi, The; Jupally, Vijay [University of Mississippi, The

2011-01-01T23:59:59.000Z

391

Inter-staple Dithiol Crosslinking in Au25(SR)18 Nanomolecules: A Combined Mass Spectrometric and Computational Study  

SciTech Connect (OSTI)

A systematic study of cross-linking chemistry of the Au{sub 25}(SR){sub 18} nanomolecule by dithiols of varying chain length, HS-(CH{sub 2}){sub n}-SH where n = 2, 3, 4, 5, and 6, is presented here. Monothiolated Au{sub 25} has six [RSAuSRAuSR] staple motifs on its surface, and MALDI mass spectrometry data of the ligand exchanged clusters show that propane (C3) and butane (C4) dithiols have ideal chain lengths for interstaple cross-linking and that up to six C3 or C4 dithiols can be facilely exchanged onto the cluster surface. Propanedithiol predominately exchanges with two monothiols at a time, making cross-linking bridges, while butanedithiol can exchange with either one or two monothiols at a time. The extent of cross-linking can be controlled by the Au{sub 25}(SR){sub 18} to dithiol ratio, the reaction time of ligand exchange, or the addition of a hydrophobic tail to the dithiol. MALDI MS suggests that during ethane (C2) dithiol exchange, two ethanedithiols become connected by a disulfide bond; this result is supported by density functional theory (DFT) prediction of the optimal chain length for the intrastaple coupling. Both optical absorption spectroscopy and DFT computations show that the electronic structure of the Au{sub 25} nanomolecule retains its main features after exchange of up to eight monothiol ligands.

Dass, Amala [University of Mississippi, The; Jiang, Deen [ORNL; Jupally, Vijay [University of Mississippi, The; Kota, Rajesh [University of Mississippi, The; Mattern, Daniell [University of Mississippi, The; Tschumper, Gregory [University of Mississippi, The; Van Dornshuld, Eric [University of Mississippi, The

2011-01-01T23:59:59.000Z

392

A study of ferromagnetic signals in SrTiO{sub 3} nanoparticles  

SciTech Connect (OSTI)

It has been suggested that ferromagnetism may be a universal feature of nanoparticles related to particle size. We study this claim for the case of commercially produced SrTiO{sub 3} nanoparticles purchased from Alfa-Aesar. Both loosely-packed nanoparticle samples and pellets formed using uniaxial pressure were studied. Both loose and pressed samples were annealed in either air or in vacuum of 5×10{sup ?6} Torr at 600, 800 and 1000°C. Then x-ray diffraction and SQUID measurements were made on the resulting samples. It was found that annealed loose powder samples always had a linear diamagnetic magnetization versus field response, while their pressed pellet counterparts exhibit a ferromagnetic hysteresis component in addition to the linear diamagnetic signal. Williamson-Hall analysis reveals that the particle size in pressed pellet samples increases with annealing temperature but does not change significantly in loose powder samples. The main conclusion is that the act of pressing pellets in a die introduces a spurious ferromagnetic signal into SQUID measurements.

Kovacs, P.; Des Roches, B.; Crandles, D. A. [Dept. of Physics, Brock University, St. Catharines, ON, L2S 3A1 (Canada)

2014-03-31T23:59:59.000Z

393

Two charged states of hydrogen on the SrTiO{sub 3}(001) surface  

SciTech Connect (OSTI)

The effects of hydrogen exposure on the electronic structure of two types of SrTiO{sub 3}(001) surfaces, oxygen-deficient (OD) and nearly-vacancy-free (NVF) surfaces, were investigated with ultraviolet photoemission spectroscopy and nuclear reaction analysis. Upon molecular hydrogen exposure to the OD surface which reveals in-gap states at 1.3 eV below the Fermi level, the in-gap state intensity was reduced to half the initial value at a hydrogen coverage of 0.9 ± 0.7 × 10{sup 14} cm{sup ?2}. On the NVF surface which has no in-gap state, on the other hand, atomic-hydrogen exposure induced in-gap states, and the hydrogen saturation coverage was evaluated to be 3.1 ± 0.8 × 10{sup 14} cm{sup ?2}. We argue that H is positively charged as H{sup ?0.3+} on the NVF surface by being coordinated to the O atom, whereas H is negatively charged as H{sup ?} on the OD surface by occupying the oxygen vacancy site. The stability of H{sup ?} at the oxygen vacancy site is discussed.

Takeyasu, Kotaro, E-mail: takeyasu@iis.u-tokyo.ac.jp; Fukada, Keisuke; Ogura, Shohei; Matsumoto, Masuaki; Fukutani, Katsuyuki, E-mail: fukutani@iis.u-tokyo.ac.jp [Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153–8505 (Japan)] [Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153–8505 (Japan)

2014-02-28T23:59:59.000Z

394

Crystal structure and magnetic properties and Zn substitution effects on the spin-chain compound Sr{sub 3}Co{sub 2}O{sub 6}  

SciTech Connect (OSTI)

The effects of substituting Co on the spin-chain compound Sr{sub 3}Co{sub 2}O{sub 6} with Zn were investigated by synchrotron X-ray diffraction, magnetic susceptibility, isothermal magnetization, and specific heat measurements. To the best of our knowledge, this is the first report to describe the successful substitution of Co in Sr{sub 3}Co{sub 2}O{sub 6} with Zn. The substitution was carried out by a method involving high pressures and temperatures to obtain Sr{sub 3}CoZnO{sub 6}, which crystalized into a K{sub 4}CdCl{sub 6}-derived rhombohedral structure with a space group of R-3c, similar to the host compound. With the Zn substitution, the Ising-type magnetic anisotropy of the host compound remarkably reduced; the newly formed Sr{sub 3}CoZnO{sub 6} became magnetically isotropic with Heisenberg-type characteristics. This could probably be ascribed to the establishment of a different interaction pathway, –Co{sup 4+}(S=1/2)–O–Zn{sup 2+}(S=0)–O–Co{sup 4+}(S=1/2)–. Details of the magnetic properties of Zn substituted Sr{sub 3}Co{sub 2}O{sub 6} were reported. - Graphical abstract: Crystal structure of the spin-chain compound Sr{sub 3}CoZnO{sub 6} synthesized at 6 GPa. Zn atoms preferably occupy the trigonal prism sites rather than the octahedral sites. As a result, the compound is much magnetically isotropic. Highlights: • Effects of substituting Co with Zn on spin-chain magnetism of Sr{sub 3}Co{sub 2}O{sub 6} were studied. • High-pressure synthesis resulted in a solid solution of Sr{sub 3}CoZnO{sub 6}. • Sr{sub 3}CoZnO{sub 6} showed more isotropic magnetism than the host Sr{sub 3}Co{sub 2}O{sub 6}.

Wang, Xia [Superconducting Properties Unit, National Institute for Materials Science, 1-1 Namiki, Tsukuba Ibaraki 305-0044 (Japan); Department of Chemistry, Graduate School of Science, Hokkaido University, Sapporo, Hokkaido 060-0810 (Japan); Guo, Yanfeng, E-mail: Yangfeng.Guo@physics.ox.ac.uk [Superconducting Properties Unit, National Institute for Materials Science, 1-1 Namiki, Tsukuba Ibaraki 305-0044 (Japan); Sun, Ying [International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba Ibaraki 305-0044 (Japan); Tsujimoto, Yoshihiro [Materials Processing Unit, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba Ibaraki 305-0047 (Japan); Matsushita, Yoshitaka [Materials Analysis Station, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba Ibaraki 305-0047 (Japan); Yamaura, Kazunari, E-mail: yamaura.kazunari@nims.go.jp [Superconducting Properties Unit, National Institute for Materials Science, 1-1 Namiki, Tsukuba Ibaraki 305-0044 (Japan); Department of Chemistry, Graduate School of Science, Hokkaido University, Sapporo, Hokkaido 060-0810 (Japan)

2013-08-15T23:59:59.000Z

395

Bridgman Growth of Large SrI2:Eu2+ Single Crystals: A High-performance Scintillator for Radiation Detection Applications  

SciTech Connect (OSTI)

Single-crystal strontium iodide (SrI2) doped with relatively high levels (e.g., 3 - 6 %) of Eu2+ exhibits characteristics that make this material superior, in a number of respects, to other scintillators that are currently used for radiation detection. Specifically, SrI2:Eu2+ has a light yield that is significantly higher than LaBr3:Ce3+ -a currently employed commercial high-performance scintillator. Additionally, SrI2:Eu2+ is characterized by an energy resolution as high as 2.6% at the 137Cs gamma-ray energy of 662 keV, and there is no radioactive component in SrI2:Eu2+ - unlike LaBr3:Ce3+ that contains 138La. The Ce3+-doped LaBr3 decay time is, however, faster (30 nsec) than the 1.2 sec decay time of SrI2:Eu2+. Due to the relatively low melting point of strontium iodide (~515 oC), crystal growth can be carried out in quartz crucibles by the vertical Bridgman technique. Materials-processing and crystal-growth techniques that are specific to the Bridgman growth of europium-doped strontium iodide scintillators are described here. These techniques include the use of a porous quartz frit to physically filter the molten salt from a quartz antechamber into the Bridgman growth crucible and the use of a bent or bulb grain selector design to suppress multiple grain growth. Single crystals of SrI2:Eu2+ scintillators with good optical quality and scintillation characteristics have been grown in sizes up to 5.0 cm in diameter by applying these techniques. Other aspects of the SrI2:Eu2+ crystal-growth methods and of the still unresolved crystal-growth issues are described here.

Boatner, Lynn A [ORNL; Ramey, Joanne Oxendine [ORNL; Kolopus, James A [ORNL; Hawrami, Rastgo [Radiation Monitoring Devices, Watertown, MA; Higgins, William [Radiation Monitoring Devices, Watertown, MA; Van Loef, Edgar [Radiation Monitoring Devices, Watertown, MA; Glodo, J. [Radiation Monitoring Devices, Watertown, MA; Shah, Kanai [Radiation Monitoring Devices, Watertown, MA; Bhattacharya, P. [Fisk University, Nashville, TN; Tupitsyn, E [Fisk University, Nashville, TN; Groza, Michael [Fisk University, Nashville, TN; Burger, Arnold [Fisk University, Nashville, TN

2013-01-01T23:59:59.000Z

396

Electrical conductivity of Sr{sub 2?x}VMoO{sub 6?y} (x?=?0.0, 0.1, 0.2) double perovskites  

SciTech Connect (OSTI)

Electrical conductivity of Sr{sub 2-x}VMoO{sub 6-y} (x?=?0.0, 0.1, 0.2) double perovskites has been investigated in a reducing atmosphere at temperatures up to 800?°C. This material has a key application in solid oxide fuel cell anodes as a mixed ion and electron conductor. A solid state synthesis technique was used to fabricate materials and crystal structure was verified through x-ray diffraction. Subsequent to conventional sintering in a reducing environment, elemental valence states were indentified through x-ray photoemission spectroscopy on the double perovskite material before and after annealing in a hydrogen environment. Samples exhibited metallic like conduction with electrical conductivities of 1250?S/cm (Sr{sub 2}VMoO{sub 6-y?}), 2530?S/cm (Sr{sub 1.8}VMoO{sub 6-y?}), and 3610?S/cm (Sr{sub 1.9}VMoO{sub 6-y?}) at 800?°C in 5% H{sub 2}/95% N{sub 2}, with a substantial increase in conductivity upon cooling to room temperature. Room temperature electrical conductivity values for Sr{sub 1.9}VMoO{sub 6-y?} make it a candidate as the highest electrically conductive oxide known. Highly insulating secondary surface phases, Sr{sub 3}V{sub 2}O{sub 8}, and SrMoO{sub 4}, begin to reduce at 400?°C in a hydrogen environment, as confirmed by X-ray photoemission and thermal gravimetric analysis. This reduction, from V{sup 5+} and Mo{sup 6+} to lower valence states, leads to a large increase in sample electrical conductivity.

Childs, Nicholas B.; Smith, Richard; Key, Camas [Department of Physics, EPS 264, Montana State University, Bozeman, Montana 59717 (United States); Weisenstein, Adam; Sofie, Stephen [Department of Mechanical Engineering, Roberts 220, Montana State University, Bozeman, Montana 59717 (United States)

2013-06-28T23:59:59.000Z

397

Spin-orbit tuned metal-insulator transitions in single-crystal Sr?Ir1–xRhxO? (0?x?1)  

DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

Sr?IrO? is a magnetic insulator driven by spin-orbit interaction (SOI) whereas the isoelectronic and isostructural Sr?RhO? is a paramagnetic metal. The contrasting ground states have been shown to result from the critical role of the strong SOI in the iridate. Our investigation of structural, transport, magnetic, and thermal properties reveals that substituting 4d Rh?? (4d?) ions for 5d Ir?? (5d?) ions in Sr?IrO? directly reduces the SOI and rebalances the competing energies so profoundly that it generates a rich phase diagram for Sr?Ir1–xRhxO? featuring two major effects: (1) Light Rh doping (0 ? x ? 0.16) prompts a simultaneous and precipitous drop in both the electrical resistivity and the magnetic ordering temperature TC, which is suppressed to zero at x = 0.16 from 240 K at x = 0. (2) However, with heavier Rh doping [0.24 1–xRhxO? is further highlighted by comparison with Sr?Ir??xRuxO? where Ru?? (4d?) drives a direct crossover from the insulating to metallic states.

Qi, T. F.; Korneta, O. B.; Li, L.; Butrouna, K.; Cao, V. S.; Wan, Xiangang; Schlottmann, P.; Kaul, R. K.; Cao, G.

2012-09-01T23:59:59.000Z

398

Interfacial mode coupling as the origin of the enhancement of Tc in FeSe films on SrTiO3  

SciTech Connect (OSTI)

Films of iron selenide (FeSe) one unit cell thick grown on strontium titanate (SrTiO3 or STO) substrates have recently shown superconducting energy gaps opening at temperatures close to the boiling point of liquid nitrogen (77 K), which is a record for the iron-based superconductors. The gap opening temperature usually sets the superconducting transition temperature Tc, as the gap signals the formation of Cooper pairs, the bound electron states responsible for superconductivity. To understand why Cooper pairs form at such high temperatures, we examine the role of the SrTiO3 substrate. Here we report high-resolution angle-resolved photoemission spectroscopy results that reveal an unexpected characteristic of the single-unit-cell FeSe/SrTiO3 system: shake-off bands suggesting the presence of bosonic modes, most probably oxygen optical phonons in SrTiO3, which couple to the FeSe electrons with only a small momentum transfer. Such interfacial coupling assists superconductivity in most channels, including those mediated by spin fluctuations. Our calculations suggest that this coupling is responsible for raising the superconducting gap opening temperature in single-unit-cell FeSe/SrTiO3.

Lee, J.J.; Schmitt, F.T.; Moore, R.G.; Johnston, S.; Cui, Y.-T.; Li, W.; Yi, M.; Liu, Z.K.; Hashimoto, M.; Zhang, Y.; Lu, D.H.; Devereaux, T.P.; Lee, D.-H.; Shen, Z.-X.

2014-11-12T23:59:59.000Z

399

(Sr,Ba)(Si,Ge){sub 2} for thin-film solar-cell applications: First-principles study  

SciTech Connect (OSTI)

In order to meet the increasing demand for electric power generation from solar energy conversion, the development of efficient light absorber materials has been awaited. To this end, the electronic and optical properties of advanced alkaline-earth-metals disilicides and digermanides (SrSi{sub 2}, BaSi{sub 2}, SrGe{sub 2}, and BaGe{sub 2}) are studied by means of the density functional theory using HSE06 exchange-correlation energy functional. Our calculations show that all these orthorhombic structured compounds have fundamental indirect band gaps in the range E{sub g} ? 0.89–1.25 eV, which is suitable for solar cell applications. The estimated lattice parameters and band gaps are in good agreement with experiments. Our calculations show that the electronic band structures of all four compounds are very similar except in the vicinity of the ?-point. The valence band of these compounds is made up by Si(Ge)-p states, whereas the conduction band is composed of Sr(Ba)-d states. Their band alignments are carefully determined by estimating the work function of each compound using slab model. The optical properties are discussed in terms of the complex dielectric function ?(?)?=??{sub 1}(?)?+?i?{sub 2}(?). The static and high-frequency dielectric constants are calculated, taking into account the ionic contribution. The absorption coefficient ?(?) demonstrates that a low energy dispersion of the conduction band, which results in a flat conduction band minimum, leads to large optical activity in these compounds. Therefore, alkaline-earth-metals disilicides and digermanides possess great potential as light absorbers for applications in thin-film solar cell technologies.

Kumar, Mukesh, E-mail: Kumar.Mukesh@nims.go.jp, E-mail: mkgarg79@gmail.com [Environmental Remediation Materials Unit, National Institute for Materials Science, Ibaraki 305-0044 (Japan); Umezawa, Naoto [Environmental Remediation Materials Unit, National Institute for Materials Science, Ibaraki 305-0044 (Japan); PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama 332-0012 (Japan); TU-NIMS Joint Research Center, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Nankai District, Tianjin (China); Imai, Motoharu [Superconducting Properties Unit, National Institute for Materials Science, Ibaraki 305-0047 (Japan)

2014-05-28T23:59:59.000Z

400

Syntheses, crystal structures and optical properties of the first strontium selenium(IV) and tellurium(IV) oxychlorides: Sr{sub 3}(SeO{sub 3})(Se{sub 2}O{sub 5})Cl{sub 2} and Sr{sub 4}(Te{sub 3}O{sub 8})Cl{sub 4}  

SciTech Connect (OSTI)

Two new quaternary strontium selenium(IV) and tellurium(IV) oxychlorides, namely, Sr{sub 3}(SeO{sub 3})(Se{sub 2}O{sub 5})Cl{sub 2} and Sr{sub 4}(Te{sub 3}O{sub 8})Cl{sub 4}, have been prepared by solid-state reaction. Sr{sub 3}(SeO{sub 3})(Se{sub 2}O{sub 5})Cl{sub 2} features a three-dimensional (3D) network structure constructed from strontium(II) interconnected by Cl{sup -}, SeO{sub 3}{sup 2-} as well as Se{sub 2}O{sub 5}{sup 2-} anions. The structure of Sr{sub 4}(Te{sub 3}O{sub 8})Cl{sub 4} features a 3D network in which the strontium tellurium oxide slabs are interconnected by bridging Cl{sup -} anions. The diffuse reflectance spectrum measurements and results of the electronic band structure calculations indicate that both compounds are wide band-gap semiconductors. - Graphical abstract: Solid-state reactions of SrO, SrCl{sub 2}, and SeO{sub 2} or TeO{sub 2} in different molar ratios and under different temperatures lead to two new strontium selenium(IV) or tellurium(IV) oxychlorides with two different types of structures, namely, Sr{sub 3}(SeO{sub 3})(Se{sub 2}O{sub 5})Cl{sub 2} and Sr{sub 4}(Te{sub 3}O{sub 8})Cl{sub 4}. Both compounds are wide band-gap semiconductors based on the diffuse reflectance spectra and the electronic band structures.

Jiang Hailong [State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002 (China); Graduate School of the Chinese Academy of Sciences, Beijing 100039 (China); Mao Jianggao [State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002 (China)], E-mail: mjg@fjirsm.ac.cn

2008-02-15T23:59:59.000Z

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401

Simple band model for La sub 1-x Sr sub x CoO sub 3 : Evidence from electron spectroscopy  

SciTech Connect (OSTI)

Valence band photoelectron spectra and high resolution electron energy loss spectra for La{sub 1-x}Sr{sub x}CoO{sub 3} (x {le} 0.5) have been measured. The general appearance and variation with photon energy of the former may be interpreted in terms of the density of states arising from a simple semiempirical tight binding band structure calculation, for reasonable values of Hamiltonian matrix elements. The latter show a highly damped loss feature below 1 eV which may be assigned to a plasma oscillation whose frequency is overestimated by the same calculations, indicating a considerable enhancement of effective mass through correlation.

Kemp, J.P.; Beal, D.J.; Cox, P.A. (Inorganic Chemistry Laboratory, Oxford (England))

1990-05-01T23:59:59.000Z

402

Test plan for composting studies involving weight and volume reduction of leaf and stalk biomass: DOE/OTD TTP{number_sign} SR17SS53 {ampersand} TTP{number_sign} SR18SS41  

SciTech Connect (OSTI)

SRTC and a panel of experts from off-site previously determined that composting was the most attractive alternative for reducing the volume and weight of biomass that was slightly radioactive. The SRTC proposed scope of work for Subtask 2 of TTP{number_sign} SR17SS53 and TTP{number_sign} SR18SS41 involves bench scale studies to assess the rates and efficiencies of various composting schemes for volume and weight reduction of leaf and stalk biomass (SB). Ultimately, the data will be used to design a composting process for biomass proposed by MSE for phytoremediation studies at SRS. This could drastically reduce costs for transporting and disposing of contaminated biomass resulting from a future major phytoremediation effort for soil clean-up at the site. The composting studies at SRTC includes collaboration with personnel from the University of Georgia, who will conduct chemical analyses of the plant material after harvest, pre-treatment, and composting for specific time periods. Parameters to be measured will include: lignin, hemicellulose, cellulose, carbon and nitrogen. The overall objective of this project is to identify or develop: (1) an inexpensive source of inoculum (consisting of nutrients and/or microorganisms) capable of significantly enhancing biomass degradation, (2) an optimum range of operating parameters for the composting process, and (3) a process design for the solid state degradation of lignocellulosic biomass contaminated with radionuclides that is superior to existing alternatives for dealing with such waste.

Wilde, E.W.; Kastner, J.; Murphy, C.; Santo Domingo, J.

1997-05-28T23:59:59.000Z

403

Hysteretic electrical transport in BaTiO{sub 3}/Ba{sub 1?x}Sr{sub x}TiO{sub 3}/Ge heterostructures  

SciTech Connect (OSTI)

We present electrical transport measurements of heterostructures comprised of BaTiO{sub 3} and Ba{sub 1?x}Sr{sub x}TiO{sub 3} epitaxially grown on Ge. Sr alloying imparts compressive strain to the BaTiO{sub 3}, which enables the thermal expansion mismatch between BaTiO{sub 3} and Ge to be overcome to achieve c-axis oriented growth. The conduction bands of BaTiO{sub 3} and Ba{sub 1?x}Sr{sub x}TiO{sub 3} are nearly aligned with the conduction band of Ge, which facilitates electron transport. Electrical transport measurements through the dielectric stack exhibit rectifying behavior and hysteresis, where the latter is consistent with ferroelectric switching.

Ngai, J. H.; Kumah, D. P.; Walker, F. J. [Department of Applied Physics and Center for Research on Interface Structures and Phenomena, Yale University, 15 Prospect Street, New Haven, Connecticut 06520-8284 (United States); Ahn, C. H. [Department of Applied Physics and Center for Research on Interface Structures and Phenomena, Yale University, 15 Prospect Street, New Haven, Connecticut 06520-8284 (United States); Department of Mechanical Engineering and Materials Science, Yale University, 10 Hillhouse Avenue, New Haven, Connecticut 06520-8267 (United States)

2014-02-10T23:59:59.000Z

404

Modulation of over 10{sup 14}?cm{sup ?2} electrons in SrTiO{sub 3}/GdTiO{sub 3} heterostructures  

SciTech Connect (OSTI)

We demonstrate charge modulation of over 10{sup 14}?cm{sup ?2} electrons in a two-dimensional electron gas formed in SrTiO{sub 3}/GdTiO{sub 3} inverted heterostructure field-effect transistors. Increased charge modulation was achieved by reducing the effect of interfacial region capacitances through thick SrTiO{sub 3} cap layers. Transport and device characteristics of the heterostructure field-effect transistors were found to match a long channel field effect transistor model. SrTiO{sub 3} impurity doped metal–semiconductor field effect transistors were also demonstrated with excellent pinch-off and current density exceeding prior reports. The work reported here provides a path towards oxide-based electronics with extreme charge modulation exceeding 10{sup 14}?cm{sup ?2}.

Boucherit, M.; Shoron, O.; Polchinski, C. [Department of Electrical and Computer Engineering, The Ohio State University, Columbus, Ohio 43210 (United States); Jackson, C. A.; Cain, T. A.; Buffon, M. L. C.; Stemmer, S. [Materials Department, University of California, Santa Barbara, California 93106-5050 (United States); Rajan, S. [Department of Electrical and Computer Engineering, The Ohio State University, Columbus, Ohio 43210 (United States); Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210 (United States)

2014-05-05T23:59:59.000Z

405

Quantum oscillations and subband properties of the two-dimensional electron gas at the LaAlO{sub 3}/SrTiO{sub 3} interface  

SciTech Connect (OSTI)

We have performed high field magnetotransport measurements to investigate the interface electron gas in a high mobility SrTiO{sub 3}/SrCuO{sub 2}/LaAlO{sub 3}/SrTiO{sub 3} heterostructure. Shubnikov-de Haas oscillations reveal several 2D conduction subbands with carrier effective masses of 0.9m{sub e} and 2m{sub e}, quantum mobilities of order 2000 cm{sup 2}/V s, and band edges only a few millielectronvolts below the Fermi energy. Measurements in tilted magnetic fields confirm the 2D character of the electron gas, and show evidence of inter-subband scattering.

McCollam, A., E-mail: A.McCollam@science.ru.nl; Guduru, V. K.; Zeitler, U.; Maan, J. C. [High Field Magnet Laboratory and Institute for Molecules and Materials, Radboud University Nijmegen, 6525 ED Nijmegen (Netherlands); Wenderich, S.; Kruize, M. K.; Molegraaf, H. J. A.; Huijben, M.; Koster, G.; Blank, D. H. A.; Rijnders, G.; Brinkman, A.; Hilgenkamp, H. [Faculty of Science and Technology and MESA Institute for Nanotechnology, University of Twente, 7500 AE Enschede (Netherlands)

2014-02-01T23:59:59.000Z

406

Role of phonon scattering by elastic strain field in thermoelectric Sr{sub 1?x}Y{sub x}TiO{sub 3??}  

SciTech Connect (OSTI)

Perovskite-type SrTiO{sub 3??} ceramics are multifunctional materials with significant potential as n-type thermoelectric (TE) materials. The electronic and thermal transport properties of spark plasma sintered polycrystalline Sr{sub 1?x}Y{sub x}TiO{sub 3??} (x?=?0.05, 0.075, 0.1) ceramics are systematically investigated from (15–800) K. The Sr{sub 0.9}Y{sub 0.1}TiO{sub 3??} simultaneously exhibits a large Seebeck coefficient, ??>??80??V/K and moderately high electrical resistivity, ????0.8?m?-cm at a carrier concentration of ?10{sup 21}?cm{sup ?3} at 300?K resulting in a high TE power factor defined herein as (?{sup 2}?T)???0.84?W/m-K at 760?K. Despite the similar atomic masses of Sr (87.6?g/mol) and Y (88.9?g/mol), the lattice thermal conductivity (?{sub L}) of Sr{sub 1?x}Y{sub x}TiO{sub 3??} is significantly reduced with increased Y-doping, owing to the smaller ionic radii of Y{sup 3+} (?1.23?Å, coordination number 12) compared to Sr{sup 2+} (?1.44?Å, coordination number 12) ions. In order to understand the thermal conductivity reduction mechanism, the ?{sub L} in the Sr{sub 1?x}Y{sub x}TiO{sub 3??} series are phenomenologically modeled with a modified Callaway's equation from 30–600?K. Phonon scattering by elastic strain field due to ionic radii mismatch is found to be the prominent scattering mechanism in reducing ?{sub L} of these materials. In addition, the effect of Y-doping on the elastic moduli of Sr{sub 1?x}Y{sub x}TiO{sub 3??} (x?=?0, 0.1) is investigated using resonant ultrasound spectroscopy, which exhibits an anomaly in x?=?0.1 in the temperature range 300–600?K. As a result, the phonon mean free path is found to be further reduced in the Sr{sub 0.9}Y{sub 0.1}TiO{sub 3??} compared to that of SrTiO{sub 3??}, resulting in a considerably low thermal conductivity ????2.7?W/m-K at 760?K. Finally, we report a thermoelectric figure of merit (ZT)???0.3 at 760?K in the Sr{sub 0.9}Y{sub 0.1}TiO{sub 3??}, the highest ZT value reported in the Y-doped SrTiO{sub 3} ceramics thus far.

Bhattacharya, S., E-mail: bbhatta@clemson.edu, E-mail: ttritt@clemson.edu [Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634 (United States); Mehdizadeh Dehkordi, A. [Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634 (United States); Tennakoon, S.; Adebisi, R.; Gladden, J. R. [Department of Physics and National Center for Physical Acoustics, University of Mississippi, University, Mississippi 38677 (United States); Darroudi, T. [Electron Microscope Facility, Clemson Research Park, Clemson University, Clemson, South Carolina 29625 (United States); Alshareef, H. N. [Materials Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900 (Saudi Arabia); Tritt, T. M., E-mail: bbhatta@clemson.edu, E-mail: ttritt@clemson.edu [Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634 (United States); Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634 (United States)

2014-06-14T23:59:59.000Z

407

Site occupancy and cation binding states in reduced polycrystalline Sr{sub x}Ba{sub 1?x}Nb{sub 2}O{sub 6}  

SciTech Connect (OSTI)

Site occupancy and cation binding states in the proposed thermoelectric n-type oxide Sr{sub x}Ba{sub 1?x}Nb{sub 2}O{sub 6} (SBN100x) were investigated using X-ray photoelectron spectroscopy (XPS). Sr 3d XPS spectra from unreduced polycrystalline SBN100x with various compositions contained two distinct spin-orbit doublets corresponding to Sr occupying either A1 or A2 positions in the SBN lattice; the higher binding energy state was associated with Sr ions at A2 sites, presumably due to their increased coordination over Sr at A1 sites. To gain insight into optimizing the thermoelectric properties of reduced SBN, sintered SBN50 specimens were reduced in Ar/H{sub 2} or N{sub 2}/H{sub 2} ambient. A decrease in the average Nb valence was observed in Nb 3d photoemission through the growth of low-binding energy components after reduction in either environment; evidence of surface NbN formation was apparent with longer reducing times in N{sub 2}/H{sub 2}. Both the single-component Ba 3d emission and the A2 component of the Sr 3d spectra show shifting to lower binding energy as the reduction time is increased, supporting the hypothesis of preferential oxygen vacancy formation adjacent to A2 sites. X-ray diffraction patterns revealed the formation of NbO{sub 2} in both reducing environments; in the case of extended reduction in N{sub 2}/H{sub 2}, NbO{sub 2} is gradually converted to NbN phases. Given the known properties of metallic NbN and semiconducting NbO{sub 2}, the findings obtained here may be used to maximize the thermoelectric performance of SBN via the fabrication of composite structures containing both NbO{sub 2} and NbN.

Dandeneau, Christopher S., E-mail: dandec@u.washington.edu; Yang, YiHsun; Ohuchi, Fumio S. [Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195 (United States)] [Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195 (United States); Krueger, Benjamin W.; Olmstead, Marjorie A. [Department of Physics, University of Washington, Seattle, Washington 98195 (United States)] [Department of Physics, University of Washington, Seattle, Washington 98195 (United States); Bordia, Rajendra K. [Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634 (United States)] [Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634 (United States)

2014-03-10T23:59:59.000Z

408

Surface electronic structure for various surface preparations of Nb-doped SrTiO{sub 3} (001)  

SciTech Connect (OSTI)

High-resolution angle-resolved photoemission spectroscopy (ARPES) was used to study the surface electronic structure of Nb-doped SrTiO{sub 3} (STO) single crystals prepared using a variety of surface preparations. ARPES measurements show that simple degreasing with subsequent anneal in vacuum is not an adequate surface preparation of STO, rather, preparations consisting of etching with buffered HF or HCl, and to a lesser extent, simple water leaching resulted in surfaces with much less disorder. A non-dispersing, mid-gap state was found ?800 meV above the top of the valence band for samples which underwent etching. This mid-gap state is not present for vacuum-annealed and water-leached samples, as well as for STO thin films grown using molecular beam epitaxy. Theoretical modeling using density functional theory suggests that this mid-gap state is not related to the SrO- and TiO{sub 2}-terminated surfaces, but rather, is due to a partial hydrogenation of the STO surface that occurs during etching.

Hatch, Richard C.; Fredrickson, Kurt D.; Choi, Miri; Lin, Chungwei; Seo, Hosung; Posadas, Agham B.; Demkov, Alexander A. [Department of Physics, The University of Texas at Austin, Austin, Texas 78712 (United States)] [Department of Physics, The University of Texas at Austin, Austin, Texas 78712 (United States)

2013-09-14T23:59:59.000Z

409

Critical thickness and strain relaxation in molecular beam epitaxy-grown SrTiO{sub 3} films  

SciTech Connect (OSTI)

We report on the study of the critical thickness and the strain relaxation in epitaxial SrTiO{sub 3} film grown on (La{sub 0.3}Sr{sub 0.7})(Al{sub 0.65}Ta{sub 0.35})O{sub 3} (001) (LSAT) substrate using the hybrid molecular beam epitaxy approach. No change in the film's lattice parameter (both the in-plane and the out-of-plane) was observed up to a film thickness of 180 nm, which is in sharp contrast to the theoretical critical thickness of ?12 nm calculated using the equilibrium theory of strain relaxation. For film thicknesses greater than 180 nm, the out-of-plane lattice parameter was found to decrease hyperbolically in an excellent agreement with the relaxation via forming misfit dislocations. Possible mechanisms are discussed by which the elastic strain energy can be accommodated prior to forming misfit dislocations leading to such anomalously large critical thickness.

Wang, Tianqi; Ganguly, Koustav; Marshall, Patrick; Xu, Peng; Jalan, Bharat [Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455 (United States)] [Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455 (United States)

2013-11-18T23:59:59.000Z

410

Electric field effects on spin accumulation in Nb-doped SrTiO{sub 3} using tunable spin injection contacts at room temperature  

SciTech Connect (OSTI)

We report on features in charge transport and spin injection in an oxide semiconductor, Nb-doped SrTiO{sub 3}. This is demonstrated using electrically tunable spin injection contacts which exploit the large electric field at the interface and its interplay with the relative permittivity of the semiconductor. We realize spin accumulation in Nb-doped SrTiO{sub 3} which displays a unique dependence of the spin lifetime with bias polarity. These findings suggest a strong influence of the interface electric field on the charge transport as well as on spin accumulation unlike in conventional semiconductors and opens up promising avenues in oxide spintronics.

Kamerbeek, A. M.; Vries, E. K. de; Wees, B. J. van; Banerjee, T., E-mail: T.Banerjee@rug.nl [Physics of Nanodevices, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen (Netherlands); Dankert, A.; Dash, S. P. [Department of Microtechnology and Nanoscience, Chalmers University of Technology, SE-41296 Gothenburg (Sweden)

2014-05-26T23:59:59.000Z

411

Origin of the superior conductivity of perovskite Ba(Sr)SnO3 Heng-Rui Liu, Ji-Hui Yang, H. J. Xiang, X. G. Gong, and Su-Huai Wei  

E-Print Network [OSTI]

Origin of the superior conductivity of perovskite Ba(Sr)SnO3 Heng-Rui Liu, Ji-Hui Yang, H. J. Xiang(Sr)SnO3 Heng-Rui Liu,1 Ji-Hui Yang,1 H. J. Xiang,1 X. G. Gong,1 and Su-Huai Wei2 1 Key Laboratory

Gong, Xingao

412

Photoluminescence, thermally stimulated luminescence and electron paramagnetic resonance investigations of Tb{sup 3+} doped SrBPO{sub 5}  

SciTech Connect (OSTI)

Graphical abstract: EPR spectra of BOHC's in 2 kGy {gamma}-irradiated SrBPO{sub 5}:Tb sample using Receiver Gain RG = 4 x 10{sup 4}, Modulation Amplitude MA = 0.25 G, Microwave power setting 6.3 mW: (A) un-annealed sample recorded at 300 K, (B) un-annealed sample recorded at 100 K and (C) sample annealed at 550 K for 10 min and recorded at 100 K. Highlights: {yields} PL studies on Tb doped SrBPO{sub 5} phosphor have shown emission due to Tb{sup 3+} associated with {sup 5}D{sub 3} {yields} {sup 7}F{sub J} and {sup 5}D{sub 4} {yields} {sup 7}F{sub J} (J = 3, 4, 5 and 6) transitions. {yields} The EPR studies on {gamma}-irradiated samples revealed formation of three types of boron oxygen hole trapped centres viz., BOHC{sub 1}, BOHC{sub 2} and BOHC{sub 3} and an electron trapped centre. {yields} The TSL peak at 475 K was associated with the thermal destruction of BOHC{sub 2}. -- Abstract: Trap level spectroscopic studies were carried out on {gamma}-irradiated Tb (1 mole%) doped SrBPO{sub 5} were carried out using photoluminescence (PL), thermally stimulated luminescence (TSL) and electron paramagnetic resonance (EPR) techniques. The incorporation of Tb in the 3+ oxidation state was ascertained from PL studies. Life time for Tb{sup 3+} emission corresponding to the intense transition {sup 5}D{sub 4} {yields} {sup 7}F{sub 5} at 543 nm was determined. The spectral characteristics of the TSL glows have shown that Tb{sup 3+} ions act as the emission center for the glow peak at 475 K. The trap parameters of the glow peak were determined. EPR investigations at room temperature/77 K revealed the stabilization of three boron oxygen hole trapped centers (BOHC's) and oxygen centered radicals such as O{sup -} and O{sub 2}{sup -} and trapped electrons in room temperature {gamma}-irradiated samples. TSL glow peak at 475 K was found to be associated with recombination of electron released from trapped electron center and the BOHC{sub 2} center.

Kumar, Mithlesh [Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085 (India)] [Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085 (India); Seshagiri, T.K., E-mail: giritks@gmail.com [Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085 (India); Kadam, R.M.; Godbole, S.V. [Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085 (India)] [Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085 (India)

2011-09-15T23:59:59.000Z

413

First Announcement of the 12th Sino-Russia Workshop of Space Weather SR-WSP12, August 25-29, 2014  

E-Print Network [OSTI]

First Announcement of the 12th Sino-Russia Workshop of Space Weather SR-WSP12, August 25-29, 2014 predictions between China and Russia, the Sino-Russian Joint Research Center was founded under the bilateral: The registration fee is 1200 RMB/person, which is payable on-site at the workshop only in cash. Website: http://sino-russia

Tian, Weidong

414

Thermal boundary resistance and diffusivity measurements on thin YBa2Cu307--x films with MgO and SrTi03 substrates using the transient  

E-Print Network [OSTI]

O and SrTiOs substrates. The anisotropic YBazCu30,-, thermal diffusivity constants and the thermal boundary, are performed to obtain information on thermal diffusivity and to demonstrate the applicability of the technique the thermal diffusivity con- stants and boundary resistance in thin films of YBCO on MgO crystalline

Fayer, Michael D.

415

Ferromagnetic Exchange Anisotropy from Antiferromagnetic Superexchange in the Mixed 3d 5d Transition-Metal Compound Sr3CuIrO6  

E-Print Network [OSTI]

of Sciences, Beijing 100190, China 3 Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois of the unusual ferromagnetism in the one- dimensional copper-iridium oxide Sr3CuIrO6. Utilizing Ir L3 edge-insulator tran- sition was shown to exist in a variety of 5d iridium oxides [2­14]. An important consequence

Ohta, Shigemi

416

Effect of strain on tunability in Ba0.60Sr0.40TiO3 thin films on PtSi substrates  

E-Print Network [OSTI]

Effect of strain on tunability in Ba0.60Sr0.40TiO3 thin films on Pt­Si substrates D. M. Potrepkaa, M. W. Cole, and W. D. Nothwang Weapons & Materials Research Directorate, Active Materials Research discussed the effects that postannealing in oxygen can have to overcome limits on oxygen diffusion

Alpay, S. Pamir

417

Electron tunneling characteristics on La[subscript 0.7]Sr[subscript 0.3]MnO[subscript 3] thin-film surfaces at high temperature  

E-Print Network [OSTI]

We report on the electron tunneling characteristics on La0.7Sr0.3MnO3 (LSM) thin-film surfaces up to 580?°C in 10[superscript ?3]?mbar oxygen pressure, using scanning tunneling microscopy/spectroscopy (STM/STS). A thresholdlike ...

Katsiev, Khabiboulakh

418

arXiv:0908.3746v1[astro-ph.SR]26Aug2009 Analytic modeling of the Moreton wave kinematics  

E-Print Network [OSTI]

arXiv:0908.3746v1[astro-ph.SR]26Aug2009 Analytic modeling of the Moreton wave kinematics M. Temmer expansion of the CME flanks), we calculate the kinematics of the associated Moreton wave signature. Those model input parameters are deter- mined which fit the observed Moreton wave kinematics best. Using

Temmer Manuela

419

REMOVAL OF TECHNETIUM 99 FROM THE EFFLUENT TREATMENT FACILITY (ETF) BASIN 44 USING PUROLITE A-530E & REILLEX HPQ & SYBRON IONAC SR-7 ION EXCHANGE RESINS  

SciTech Connect (OSTI)

This report documents the laboratory testing and analyses as directed under the test plan, RPP-20407. The overall goal of this task was to evaluate and compare candidate anion exchange resins for their capacity to remove Technetium-99 from Basin 44 Reverse Osmosis reject stream. The candidate resins evaluated were Purolite A-530E, Reillex HPQ, and Sybron IONAC SR-7.

DUNCAN JB

2004-10-29T23:59:59.000Z

420

arXiv:1208.0640v1[astro-ph.SR]3Aug2012 Contracting and Erupting Components of Sigmoidal Active  

E-Print Network [OSTI]

arXiv:1208.0640v1[astro-ph.SR]3Aug2012 Contracting and Erupting Components of Sigmoidal Active of the Atmospheric Imaging Assembly (AIA) onboard SDO, we are able to identify both the contracting and erupting components of the eruptions: the former is observed in cold AIA chan- nels as the contracting coronal loops

Note: This page contains sample records for the topic "js rogers sr" from the National Library of EnergyBeta (NLEBeta).
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421

Proton-Conducting Films of Nanoscale Ribbons Formed by Exfoliation of the Layer Perovskite H2SrTa2O7  

E-Print Network [OSTI]

Proton-Conducting Films of Nanoscale Ribbons Formed by Exfoliation of the Layer Perovskite H2SrTa2OTa2O7 were grown and characterized as solid-state proton conductors. The ribbons, made by exfoliation membranes made from layered materials such as exfoliated zirconium phosphate.12 Unfortunately, the proton

422

Raman spectrum and ESR of Pr0.5Ca0.4Sr0.1MnO3  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Raman spectrum and ESR of Pr 0.5 Ca 0.4 Sr 0.1 MnO 3 H.-D. Zhou a , G. Li a , F. Liu a , S.-J. Feng a , Y. Liu a , X.-G. Li a, * , J. Fang b a Structure Research Laboratory,...

423

Fracture Testing of a Self-Healing Polymer Composite by E.N. Brown, N.R. Sottos and S.R. White  

E-Print Network [OSTI]

Fracture Testing of a Self-Healing Polymer Composite by E.N. Brown, N.R. Sottos and S.R. White with an embedded catalyst. The effects of size and concentration of the catalyst and mi- crocapsules on fracture as much as 90 percent of its virgin fracture toughness. KEY WORDS--Self-healing, autonomic healing

Sottos, Nancy R.

424

Fermi Surface of SrFe2P2 Determined by the de Haasvan Alphen Effect J. G. Analytis,1,2  

E-Print Network [OSTI]

1 Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA 2 Geballe Laboratory for Advanced Materials 10 August 2009) We report measurements of the Fermi surface (FS) of the ternary iron-phosphide SrFe2P

Fisher, Ian

425

arXiv:1205.5114v1[astro-ph.SR]23May2012 370 Years of Astronomy at Utrecht  

E-Print Network [OSTI]

arXiv:1205.5114v1[astro-ph.SR]23May2012 370 Years of Astronomy at Utrecht ASP Conference Series in eclipse spectra taken in 1973. 1. Utrecht solar physics I spent 50 years in Utrecht astronomy, arriving as a student in the autumn of 1961 and cleaning out my desk at the near-defunct Sterrekundig Instituut Utrecht

Rutten, Rob

426

Water adsorption on SrTiO3(001): II. Water, water, everywhere A.E. Becerra-Toledo a,  

E-Print Network [OSTI]

Water adsorption on SrTiO3(001): II. Water, water, everywhere A.E. Becerra-Toledo a, , J January 2012 Available online 17 January 2012 Keywords: Strontium titanate Density functional theory Water adsorption Surface reconstruction X-ray photoelectron spectroscopy Oxide surfaces The role of water

Marks, Laurence D.

427

Oxygen-related dielectric relaxation and leakage characteristics of Pt,,Ba,Sr...TiO3 Pt thin-film capacitors  

E-Print Network [OSTI]

Oxygen-related dielectric relaxation and leakage characteristics of Pt�,,Ba,Sr...TiO3 �Pt thin to the postannealing temperature in oxygen and nitrogen atmosphere. High leakage currents and low-frequency dielectric and subsequently annealed in oxygen at 350 °C. Such results are related to the mobile oxygen ions and oxygen

Cao, Wenwu

428

Role of step edges in oxygen vacancy transport into SrTiO3,,001... Department of Physics, University of California at Davis, Davis, California 95616  

E-Print Network [OSTI]

Role of step edges in oxygen vacancy transport into SrTiO3,,001... X. D. Zhua Department of Physics deficient. The excess oxygen vacancies in the monolayers are reduced by vacancy diffusion into the bulk. We successive monolayer depositions. We propose that the indiffusion of excess surface oxygen vacancies takes

Zhu, Xiangdong

429

Synthesis and characterization of rare-earth doped SrBi{sub 2}Nb{sub 2}O{sub 9} phase in lithium borate based nanocrystallized glasses  

SciTech Connect (OSTI)

Glass composites comprising of un-doped and samarium-doped SrBi{sub 2}Nb{sub 2}O{sub 9} nanocrystallites are fabricated in the glass system 16.66SrO-16.66[(1-x)Bi{sub 2}O{sub 3}-xSm{sub 2}O{sub 3}]-16.66Nb{sub 2}O{sub 5}-50Li{sub 2}B{sub 4}O{sub 7} (0<=x<=0.5, in mol%) via the melt quenching technique. The glassy nature of the as-quenched samples is established by differential thermal analyses. Transmission electron microscopic studies reveal the presence of about 15 nm sized spherical crystallites of the fluorite-like SrBi{sub 1.9}Sm{sub 0.1}Nb{sub 2}O{sub 9} phase in the samples heat treated at 530 deg. C. The formation of layered perovskite-type un-doped and samarium-doped SrBi{sub 2}Nb{sub 2}O{sub 9} nanocrystallites with an orthorhombic structure through the intermediate fluorite phase is confirmed by X-ray powder diffraction and micro-Raman spectroscopic studies. The influence of samarium doping on the lattice parameters, lattice distortions, and the Raman peak positions of SrBi{sub 2}Nb{sub 2}O{sub 9} perovskite phase is clarified. The dielectric constants of the perovskite SrBi{sub 2}Nb{sub 2}O{sub 9} and SrBi{sub 1.9}Sm{sub 0.1}Nb{sub 2}O{sub 9} nanocrystals are relatively larger than those of the corresponding fluorite-like phase and the precursor glass. - Graphical Abstract: This figure shows the XRD patterns at room temperature for the as-quenched and heat treated samples in Sm{sub 2}O{sub 3}-doped (x=0.1) glass. Based on these results, it is concluded that the formation of samarium-doped perovskite SBN phase takes place via an intermediate fluorite-like phase in the crystallization of this glass.

Harihara Venkataraman, B. [Department of Materials Science and Technology, Nagaoka University of Technology, 1603-1 Kamitomioka-cho, Nagaoka 940-2188 (Japan); Fujiwara, Takumi [Department of Applied Physics, Graduate School of Engineering, Tohoku University, Sendai 980-8579 (Japan); Komatsu, Takayuki, E-mail: komatsu@mst.nagaokaut.ac.j [Department of Materials Science and Technology, Nagaoka University of Technology, 1603-1 Kamitomioka-cho, Nagaoka 940-2188 (Japan)

2009-06-15T23:59:59.000Z

430

[5] Suh JS, Jeong KS, Lee JS, Han IT. Study of the field-screening effect of highly ordered carbon nanotube arrays. Appl Phys Lett  

E-Print Network [OSTI]

molecular weight polymer. The interfacial strength between carbon fillers and epoxy resin varies for improving and/or optimizing the manufacturing process of epoxy­matrix composites. Epoxy resin filled with various carbons (carbon fiber, carbon nanofiber and carbon black) was studied. The epoxy resin system

Chung, Deborah D.L.

431

Unconventional Electronic Reconstruction in Undoped (Ba,Sr)Fe2As2 Across the Spin Density Wave Transition  

SciTech Connect (OSTI)

Through a systematic high-resolution angle-resolved photoemission study of the iron pnictide compounds (Ba,Sr)Fe{sub 2}As{sub 2}, we show that the electronic structures of these compounds are significantly reconstructed across the spin density wave transition, which cannot be described by a simple folding scenario of conventional density wave ordering. Moreover, we find that LDA calculations with an incorporated suppressed magnetic moment of 0.5{mu}{sub B} can match well the details in the reconstructed electronic structure, suggesting that the nature of magnetism in the pnictides is more itinerant than local, while the origin of suppressed magnetic moment remains an important issue for future investigations.

Yi, M.

2010-06-02T23:59:59.000Z

432

The surface structure of SrTiO{sub 3} at high temperatures under influence of oxygen  

SciTech Connect (OSTI)

We use low energy electron microscopy to investigate the structure of the SrTiO{sub 3} (001) surface at elevated temperatures and different oxygen pressures. Upon varying the temperature between 500?°C and 900?°C in oxygen pressures ranging from 10{sup ?9} millibar to 10{sup ?4} millibar, two surface transitions are found to be present. The lower temperature (1 × 1) ? (2 × 1) transition that is known to occur in ultrahigh vacuum can be reversed by increasing the oxygen pressure. At higher temperatures, we observe a (2 × 1) ? disordered (1 × 1) transition which is irreversible in the experimental parameter range. The observations are expected to have a strong bearing on the growth of interface structures.

Hesselberth, M. B. S.; Molen, S. J. van der; Aarts, J. [Kamerlingh Onnes Laboratory, Leiden University, P.O. Box 9504, 2300 RA Leiden (Netherlands)

2014-02-03T23:59:59.000Z

433

Octahedral rotations in strained LaAlO{sub 3}/SrTiO{sub 3} (001) heterostructures  

SciTech Connect (OSTI)

Many complex oxides display an array of structural instabilities often tied to altered electronic behavior. For oxide heterostructures, several different interfacial effects can dramatically change the nature of these instabilities. Here, we investigate LaAlO{sub 3}/SrTiO{sub 3} (001) heterostructures using synchrotron x-ray scattering. We find that when cooling from high temperature, LaAlO{sub 3} transforms from the Pm3{sup ¯}m to the Imma phase due to strain. Furthermore, the first 4 unit cells of the film adjacent to the substrate exhibit a gradient in rotation angle that can couple with polar displacements in films thinner than that necessary for 2D electron gas formation.

Fister, T. T.; Hruszkewycz, S. O.; Proffit, D. L.; Eastman, J. A.; Fuoss, P. H.; Baldo, P. M.; Fong, D. D. [Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Zhou, H. [X-Ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Luo, Z. [National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029 (China); Seo, S. S. A.; Lee, H. N. [Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)

2014-02-01T23:59:59.000Z

434

Sr lattice clock at 1x10^{-16} fractional uncertainty by remote optical evaluation with a Ca clock  

E-Print Network [OSTI]

Optical atomic clocks promise timekeeping at the highest precision and accuracy, owing to their high operating frequencies. Rigorous evaluations of these clocks require direct comparisons between them. We have realized a high-performance remote comparison of optical clocks over km-scale urban distances, a key step for development, dissemination, and application of these optical standards. Through this remote comparison and a proper design of lattice-confined neutral atoms for clock operation, we evaluate the uncertainty of a strontium (Sr) optical lattice clock at the 1x10-16 fractional level, surpassing the best current evaluations of cesium (Cs) primary standards. We also report on the observation of density-dependent effects in the spin-polarized fermionic sample and discuss the current limiting effect of blackbody radiation-induced frequency shifts.

A. D. Ludlow; T. Zelevinsky; G. K. Campbell; S. Blatt; M. M. Boyd; M. H. G. de Miranda; M. J. Martin; J. W. Thomsen; S. M. Foreman; Jun Ye; T. M. Fortier; J. E. Stalnaker; S. A. Diddams; Y. Le Coq; Z. W. Barber; N. Poli; N. D. Lemke; K. M. Beck; C. W. Oates

2008-01-28T23:59:59.000Z

435

Tunable terahertz emission from Bi{<_2}Sr{<_2}CaCu{<_2}O{<_8+delta} mesa devices.  

SciTech Connect (OSTI)

We have measured coherent terahertz emission spectra from Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} mesa devices as a function of temperature and mesa bias voltage. The emission frequency is found to be tunable by up to 12% by varying the temperature and bias voltage. We attribute the appearance of tunability to asymmetric boundaries at the top and bottom and the nonrectangular cross section of the mesas. This interpretation is consistent with numerical simulations of the dynamics of intrinsic Josephson junctions in the mesa. Easily tunable emission frequency may have important implications for the design of terahertz devices based on stacked intrinsic Josephson junctions.

Benseman, T. M.; Koshelev, A. E.; Gray, K. E.; Kwok, W.-K.; Welp, U.; Kadowaki, K.; Tachiki, M.; Yamamoto, T. (Materials Science Division); (Univ. Tsukuba); (Japan Atomic Energy Agency)

2011-01-01T23:59:59.000Z

436

Detection of charge transfer processes in Cr-doped SrTiO{sub 3} single crystals  

SciTech Connect (OSTI)

An insulator-to-metal transition is observed in Cr-doped SrTiO{sub 3} single crystals upon extended exposure to a high electric field, namely, electroconditioning (EC). Electron paramagnetic resonance (EPR) and transport measurements under laser irradiation show anticorrelation between the Cr{sup 3+} EPR signal and the electrical current. This proves that the Cr{sup 3+} ions are responsible for the photocurrent that initiates the EC process. We observe the presence of Cr{sup 3+}/Cr{sup 4+} mixed valencies in the bulk in the conducting state. The EPR characterization of the spectra in the conducting state excludes the possibility of a Cr{sup 3+}-oxygen vacancy complex in the bulk as a result of the EC.

La Mattina, F. [Physik-Institut der Universitaet Zuerich, Winterthurerstr. 190, CH-8057 Zuerich (Switzerland); IBM Research, Zurich Research Laboratory, Saeumerstr. 4, CH-8803 Rueschlikon (Switzerland); Bednorz, J. G.; Alvarado, S. F. [IBM Research, Zurich Research Laboratory, Saeumerstr. 4, CH-8803 Rueschlikon (Switzerland); Shengelaya, A. [Physics Institute of Tbilisi State University, Chavchavadze 3, GE-0128, Tbilisi (Georgia); Keller, H. [Physik-Institut der Universitaet Zuerich, Winterthurerstr. 190, CH-8057 Zuerich (Switzerland)

2008-07-14T23:59:59.000Z

437

Heterojunction band offsets and dipole formation at BaTiO{sub 3}/SrTiO{sub 3} interfaces  

SciTech Connect (OSTI)

We used a complement of photoemission and cathodoluminescence techniques to measure formation of the BaTiO{sub 3} (BTO) on SrTiO{sub 3} (STO) heterojunction band offset grown monolayer by monolayer by molecular beam epitaxy. X-ray photoemission spectroscopy (XPS) provided core level and valence band edge energies to monitor the valence band offset in-situ as the first few crystalline BTO monolayers formed on the STO substrate. Ultraviolet photoemission spectroscopy (UPS) measured Fermi level positions within the band gap, work functions, and ionization potentials of the growing BTO film. Depth-resolved cathodoluminescence spectroscopy measured energies and densities of interface states at the buried heterojunction. Kraut-based XPS heterojunction band offsets provided evidence for STO/BTO heterojunction linearity, i.e., commutativity and transitivity. In contrast, UPS and XPS revealed a large dipole associated either with local charge transfer or strain-induced polarization within the BTO epilayer.

Balaz, Snjezana [Department of Physics and Astronomy, Youngstown State University, One University Plaza, Youngstown, Ohio 44555 (United States)] [Department of Physics and Astronomy, Youngstown State University, One University Plaza, Youngstown, Ohio 44555 (United States); Zeng, Zhaoquan [Department of Electrical and Computer Engineering, The Ohio State University, 205 Dreese Lab, 2015 Neil Ave., Columbus, Ohio 43210 (United States)] [Department of Electrical and Computer Engineering, The Ohio State University, 205 Dreese Lab, 2015 Neil Ave., Columbus, Ohio 43210 (United States); Brillson, Leonard J. [Department of Electrical and Computer Engineering, The Ohio State University, 205 Dreese Lab, 2015 Neil Ave., Columbus, Ohio 43210 (United States) [Department of Electrical and Computer Engineering, The Ohio State University, 205 Dreese Lab, 2015 Neil Ave., Columbus, Ohio 43210 (United States); Department of Physics, The Ohio State University, 191 West Woodruff, Columbus, Ohio 43210 (United States)

2013-11-14T23:59:59.000Z

438

Influence of misonidazole, SR-2508, RSU-1069 and WR-2721 on spontaneous metastases in C57BL mice  

SciTech Connect (OSTI)

The effect of treatments with the hypoxic cell radiosensitizers misonidazole (MISO), SR-2508, RSU-1069, and with the radioprotector WR-2721 on spontaneously disseminated Lewis lung carcinoma (LLC) and B16 melanoma (B16M) was investigated. Tumors were implanted into the tails of C57BL mice and were surgically removed after reaching volumes of approximately 40 mm3. This technique results in the induction of metastatic disease in lungs and at other anatomical sites and allows the independent treatment of disseminated tumor cells. The radiosensitizers and the radioprotector were administered 24 hr after surgery and animals were killed 14 and 30 days after removal of LLC and B16M, respectively. The time to death from spontaneous metastases was also measured. Both single treatments with large doses of MISO (1.0 g/kg) and fractionated therapy with smaller doses (0.5 g/kg on 5 consecutive days) promoted the formation of metastases to the lungs, lymph nodes and other organs. The survival times of MISO treated animals did not differ from control animals but manifestation of metastatic disease in the lungs and other organs occurred at earlier times. Administration of equitoxic doses of SR-2508 (3.0 g/kg) and RSU-1069 (0.1 g/kg) also promoted metastases formation. Mice treated with these radiosensitizers developed more metastases in the lungs and at other sites. Treatment with a single dose of WR-2721 (0.4 g/kg) promoted lung metastases but exerted a suppressive effect on lymph node tumors. When the radioprotector was given in fractionated schedules in three different doses (0.05 g/kg, 0.1 g/kg and 0.2 g/kg for 10 consecutive days) a slight enhancement of lung metastases and suppression of extrapulmonary metastases was observed.

Kanclerz, A.; Chapman, J.D.

1988-02-01T23:59:59.000Z

439

San Francisco Estuary Striped Bass Migration History Determined by Electron-microprobe Analysis of Otolith Sr/Ca Ratio  

SciTech Connect (OSTI)

Habitat use has been shown to be an important factor in the bioaccumulation of contaminants in striped bass. This study examines migration in striped bass as part of a larger study investigating bioaccumulation and maternal transfer of xenobiotics to progeny in the San Francisco Estuary system. Habitat use, residence time and spawning migration over the life of females (n = 23) was studied. Female striped bass were collected between Knights Landing and Colusa on the Sacramento River during the spawning runs of 1999 and 2001. Otoliths were removed, processed and aged via otolith microstructure. Subsequently, otoliths were analyzed for strontium/calcium (Sr/Ca) ratio using an electron-microprobe to measure salinity exposure and to distinguish freshwater, estuary, and marine habitat use. Salinity exposure during the last year before capture was examined more closely for comparison of habitat use by the maternal parent to contaminant burden transferred to progeny. Results were selectively confirmed by ion microprobe analyses for habitat use. The Sr/Ca data demonstrate a wide range of migratory patterns. Age of initial ocean entry differs among individuals before returning to freshwater, presumably to spawn. Some fish reside in freshwater year-round, while others return to more saline habitats and make periodic migrations to freshwater. Frequency of habitat shifts and residence times differs among fish, as well as over the lifetime of individual fish. While at least one fish spent its final year in freshwater, the majority of spawning fish spent their final year in elevated salinity. However, not all fish migrated to freshwater to spawn in the previous year. Results from this investigation concerning migration history in striped bass can be combined with contaminant and histological developmental analyses to better understand the bioaccumulation of contaminants and the subsequent effects they and habitat use have on fish populations in the San Francisco Estuary system.

Ostrach, D J; Phillis, C C; Weber, P K; Ingram, B L; Zinkl, J G

2004-09-17T23:59:59.000Z

440

Neutron diffraction study of the crystal structure and structural phase transition of La{sub 0.7}Ca{sub 0.3-x}Sr{sub x}CrO{sub 3} (0<=x<=0.3)  

SciTech Connect (OSTI)

The crystal structure of the La{sub 0.7}Ca{sub 0.3-x}Sr{sub x}CrO{sub 3} series, including the compositional and temperature dependence of the structural parameters, has been studied by variable temperature neutron diffraction measurements. The extent of the distortions from the ideal cubic perovskite structure has been evaluated quantitatively using the average bond lengths and the mean volumes of the [CrO{sub 6}] octahedron and [(La/Ca/Sr)O{sub 12}] polyhedron, and has been shown to decrease with increase of Sr content or temperature. At the structural phase transition from the orthorhombic (Pnma) structure to the rhombohedral (R3-barc) one, the volume of the [CrO{sub 6}] octahedron decreases whereas that of the [(La/Ca/Sr)O{sub 12}] polyhedron shows little difference, resulting in an overall decrease in the level of distortion. The change in the degree of distortion at the phase transition decreases with increase of Sr content, in agreement with the smaller variation of the enthalpy and volume for the specimens with higher Sr content. - Graphical abstract: Temperature dependence of parameter, PHI, representing the extent of distortion from the ideal cubic perovskite structure, for La{sub 0.7}Ca{sub 0.3}CrO{sub 3} (diamonds) and La{sub 0.7}Ca{sub 0.15}Sr{sub 0.15}CrO{sub 3} (circles) calculated from neutron diffraction patterns.

Omoto, Kazuki [Department of Integrated Sciences in Physics and Biology, College of Humanities and Sciences, Nihon University, 3-25-40 Sakurajousui, Setagaya-ku, Tokyo 156-8550 (Japan); Norberg, Stefan T. [Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-412 96 Gothenburg (Sweden); ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX (United Kingdom); Hull, Steve [ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX (United Kingdom); Aoto, Akimitsu [Department of Integrated Sciences in Physics and Biology, College of Humanities and Sciences, Nihon University, 3-25-40 Sakurajousui, Setagaya-ku, Tokyo 156-8550 (Japan); Hashimoto, Takuya, E-mail: takuya@chs.nihon-u.ac.j [Department of Integrated Sciences in Physics and Biology, College of Humanities and Sciences, Nihon University, 3-25-40 Sakurajousui, Setagaya-ku, Tokyo 156-8550 (Japan)

2010-02-15T23:59:59.000Z

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441

Effects of depositon rate on Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub 8+x] and Bi[sub 2]Sr[sub 1. 6]La[sub 0. 4]CuO[sub 6+x] epitaxial thin film growth by pulsed-laser ablation  

SciTech Connect (OSTI)

Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub 8+x] and Bi[sub 2]Sr[sub 1.6]La[sub 0.4]CuO[sub 6+x] epitaxial films have been grown on (001) MgO and SrTiO[sub 3] substrates at different deposition rates by pulsed-laser ablation(PLA). Surface morphology, crystallinity and superconducting critical temperature of the films depend sensitively on deposition rate even though ablation target composition and substrate temperature were kept almost constant. Scanning election microscopy showed that density of particles generated by PLA is reduced by decreasing the deposition rate. Results show that the highest quality films of the highly anisotropic Bi-based materials are deposited by PLA at a low deposition rate, which results in film growth in a near-equilibrium state. 9 refs, 1 tab, 3 figs.

Zhu, S. (Tennessee Univ., Knoxville, TN (United States). Dept. of Physics and Astronomy); Lowndes, D.H.; Chakoumakos, B.C.; Christen, D.K.; Budai, J.D.; Zheng, X.Y.; Warmack, R.J. (Oak Ridge National Lab., TN (United States))

1993-01-01T23:59:59.000Z

442

Effects of depositon rate on Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+x} and Bi{sub 2}Sr{sub 1.6}La{sub 0.4}CuO{sub 6+x} epitaxial thin film growth by pulsed-laser ablation  

SciTech Connect (OSTI)

Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+x} and Bi{sub 2}Sr{sub 1.6}La{sub 0.4}CuO{sub 6+x} epitaxial films have been grown on (001) MgO and SrTiO{sub 3} substrates at different deposition rates by pulsed-laser ablation(PLA). Surface morphology, crystallinity and superconducting critical temperature of the films depend sensitively on deposition rate even though ablation target composition and substrate temperature were kept almost constant. Scanning election microscopy showed that density of particles generated by PLA is reduced by decreasing the deposition rate. Results show that the highest quality films of the highly anisotropic Bi-based materials are deposited by PLA at a low deposition rate, which results in film growth in a near-equilibrium state. 9 refs, 1 tab, 3 figs.

Zhu, S. [Tennessee Univ., Knoxville, TN (United States). Dept. of Physics and Astronomy; Lowndes, D.H.; Chakoumakos, B.C.; Christen, D.K.; Budai, J.D.; Zheng, X.Y.; Warmack, R.J. [Oak Ridge National Lab., TN (United States)

1993-06-01T23:59:59.000Z

443

Ge~~?srE~~rs~anSJla~~~l!u~?a~!L:Ya~~ld and Mariant:H. Marchand  

E-Print Network [OSTI]

Ge~~?srE~~rs~anSJla~~~l!u~?a~!L:Ya~~ld and Mariant:H. Marchand Gender in a Global/Local World c

Brody, James P.

444

Left-handed properties of manganite-perovskites La{sub 1-x}Sr{sub x}MnO{sub 3} at various dopant concentrations  

SciTech Connect (OSTI)

The experimental study of Double Negative (DNG) state of electromagnetic wave propagating in lanthanum manganite-perovskites doped with strontium La{sub 1-x}Sr{sub x}MnO{sub 3} is provided firstly below individual Curie temperatures (in ferromagnetic metal state (FM) for La{sub 1-x}Sr{sub x}MnO{sub 3}). Various dopant concentrations are considered for ceramic specimens: x = 0.15;??0.225;??0.3;??0.45;??0.6. It is shown that dependence of the DNG-peak intensity on dopant concentration is sharply non-monotone with maximum at the dopant concentrations x = 0.225 – 0.3. This behaviour follows the change of Curie temperature with increase of dopant concentration in such substances. The obtained dependence of DNG peak intensity supports the opinion concerning the role of disorder in highly doped manganite-perovskite magnetic ceramics under study.

Belozorov, D. P. [Institute for Theoretical Physics NSC “Kharkov Institute of Physics and Technology” NAS of Ukraine, 1 Akademicheskaja St., Kharkov, 61108 (Ukraine)] [Institute for Theoretical Physics NSC “Kharkov Institute of Physics and Technology” NAS of Ukraine, 1 Akademicheskaja St., Kharkov, 61108 (Ukraine); Girich, A. A.; Tarapov, S. I., E-mail: tarapov@ire.kharkov.ua [Institute of Radiophysics and Electronics NAS of Ukraine, 12 Proskura St., Kharkov, 61085 (Ukraine); Pogorily, A. M.; Tovstolytkin, A. I. [Institute of Magnetism, 36-b Vernadsky Blvd., Kyiv 03142 (Ukraine)] [Institute of Magnetism, 36-b Vernadsky Blvd., Kyiv 03142 (Ukraine); Belous, A. G.; Solopan, S. A. [Institute of General and Inorganic Chemistry, 32/34 Palladina Blvd., Kyiv 03142 (Ukraine)] [Institute of General and Inorganic Chemistry, 32/34 Palladina Blvd., Kyiv 03142 (Ukraine)

2014-03-15T23:59:59.000Z

445

NLTE strontium abundance in a sample of extremely metal poor stars and the Sr/Ba ratio in the early Galaxy  

E-Print Network [OSTI]

Heavy element abundances in extremely metal-poor stars provide strong constraints on the processes of forming these elements in the first stars. We attempt to determine precise abundances of strontium in a homogeneous sample of extremely metal-poor stars. The abundances of strontium in 54 very or extremely metal-poor stars, was redetermined by abandoning the local thermodynamic equilibrium (LTE) hypothesis, and fitting non-LTE (NLTE) profiles to the observed spectral lines. The corrected Sr abundances and previously obtained NLTE Ba abundances are compared to the predictions of several hypothetical formation processes for the lighter neutron-capture elements. Our NLTE abundances confirm the previously determined huge scatter of the strontium abundance in low metallicity stars. This scatter is also found (and is even larger) at very low metallicities (i. e. early in the chemical evolution). The Sr abundance in the extremely metal-poor (EMP) stars is compatible with the main r-process involved in other processe...

Andrievsky, S M; Korotin, S A; Francois, P; Spite, M; Bonifacio, P; Cayrel, R; Hill, V

2011-01-01T23:59:59.000Z

446

Epitaxial Ba{sub 2}IrO{sub 4} thin-films grown on SrTiO{sub 3} substrates by pulsed laser deposition  

SciTech Connect (OSTI)

We have synthesized epitaxial Ba{sub 2}IrO{sub 4} (BIO) thin-films on SrTiO{sub 3} (001) substrates by pulsed laser deposition and studied their electronic structure by dc-transport and optical spectroscopic experiments. We have observed that BIO thin-films are insulating but close to the metal-insulator transition boundary with significantly smaller transport and optical gap energies than its sister compound, Sr{sub 2}IrO{sub 4}. Moreover, BIO thin-films have both an enhanced electronic bandwidth and electronic-correlation energy. Our results suggest that BIO thin-films have great potential for realizing the interesting physical properties predicted in layered iridates.

Nichols, J., E-mail: john.nichols@uky.edu; Korneta, O. B.; Terzic, J.; Cao, G.; Brill, J. W.; Seo, S. S. A. [Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506 (United States)

2014-03-24T23:59:59.000Z

447

Abnormal thermal conductivity in tetragonal tungsten bronze Ba{sub 6?x}Sr{sub x}Nb{sub 10}O{sub 30}  

SciTech Connect (OSTI)

Ba{sub 6?x}Sr{sub x}Nb{sub 10}O{sub 30} solid solution with 0???x???6 crystallizes in centrosymmetric tetragonal “tungsten bronze” structure (space group P4/mbm). We report on the x dependence of thermal conductivity of polycrystalline samples measured in the 2–400?K temperature interval. Substitution of Sr for Ba brings about a significant decrease in thermal conductivity at x???3 accompanied by development of a low-temperature (T???10–30?K) “plateau” region reminiscent of a glass-like compounds. We explain this behaviour based on a size-driven site occupancy and atomic displacement parameters associated with an alkaline earth atomic positions in the title compounds.

Kolodiazhnyi, T., E-mail: kolodiazhnyi.taras@nims.go.jp; Sakurai, H.; Vasylkiv, O.; Borodianska, H. [National Institute for Materials Science, Tsukuba, Ibaraki 305-0044 (Japan); Mozharivskyj, Y. [Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S4M1 (Canada)

2014-03-17T23:59:59.000Z

448

A New Class of Octahedral Molecular Sieve Materials for the Selective Removal and Sequestration of {sup 90}Sr{sup 2+}  

SciTech Connect (OSTI)

The structure of Na{sub 16}Nb{sub 12.8}Ti{sub 3.2}O{sub 44.8}(OH){sub 3.2} {center_dot} 8H{sub 2}O, a member of a new family of Sandia Octahedral Molecular Sieves (SOMS) having a Nb/Na/M{sup IV} (M= Ti, Zr) oxide framework and exchangeable Na and water in open channels, was determined from Synchrotron X-ray data. The SOMS phases are isostructural with variable M{sup IV}:Nb(1:50--1:4) ratios. The SOMS are extremely selective for sorption of divalent cations, particularly Sr{sup 2+}. The ion-exchanged SOMS undergo direct thermal conversion to a perovskite-type phase, indicating this is a promising new method for removal and sequestration of radioactive Sr-90 from mixed nuclear wastes.

NYMAN,MAY D.; NENOFF,TINA M.; TRIPATHI,AKHILESH; PARISE,JOHN B.; MAXWELL,ROBERT S.; HARRISON,WILLIAM T.A.

2000-07-14T23:59:59.000Z

449

Atomic and electronic structures of single-layer FeSe on SrTiO3(001): The role of oxygen deficiency  

DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

Using first-principles calculation, we propose an interface structure for single triple-layer FeSe on the SrTiO3(001) surface, a high-Tc superconductor found recently. The key component of this structure is the oxygen deficiency on the top layer of the SrTiO3 substrate, as a result of Se etching used in preparing the high-Tc samples. The O vacancies strongly bind the FeSe triple layer to the substrate giving rise to a (2×1) reconstruction, as observed by scanning tunneling microscopy. The enhanced binding correlates to the significant increase of Tc observed in experiment. The O vacancies also serve as the source of electron doping, which modifies the Fermi surface of the first FeSe layer by filling the hole pocket near the center of the surface Brillouin zone, as suggested from angle-resolved photoemission spectroscopy measurement.

Bang, Junhyeok; Li, Zhi; Sun, Y. Y.; Samanta, Amit; Zhang, Y. Y.; Zhang, Wenhao; Wang, Lili; Chen, X.; Ma, Xucun; Xue, Q.-K.; Zhang, S. B.

2013-06-01T23:59:59.000Z

450

Nanoscale Probing of Voltage Activated Oxygen Reduction/Evolution Reactions in Nanopatterned (LaxSr1-x)CoO3- Cathodes  

SciTech Connect (OSTI)

Bias-dependent mechanisms of reversible and irreversible electrochemical processes on a (La0.5Sr0.5)2CoO4 modified (LaxSr1-x)CoO3- surface are studied using dynamic electrochemical strain microscopy (D-ESM). The reversible oxygen reduction/evolution process is activated at voltages as low as 3 4 V and the degree of transformation increases linearly with applied bias. The irreversible processes associated with static surface deformation become apparent above 10 12 V. Post-mortem focused-ion milling combined with atomic resolution scanning transmission electron microscopy and electron energy loss spectroscopy is used to establish the mechanisms of irreversible transformations and attribute it to amorphization of the top layer of material. These studies both establish the framework for probing irreversible electrochemical processes in solids and illustrate rich spectrum of electrochemical transformations underpinning electrocatalytic activity in cobaltites.

Leonard, Donovan N [ORNL; Kumar, Amit [ORNL; Jesse, Stephen [ORNL; Biegalski, Michael D [ORNL; Christen, Hans M [ORNL; Mutoro, Eva [Massachusetts Institute of Technology (MIT); Crumlin, Ethan [Massachusetts Institute of Technology (MIT); Shao-Horn, Yang [Massachusetts Institute of Technology (MIT); Kalinin, Sergei V [ORNL; Borisevich, Albina Y [ORNL

2013-01-01T23:59:59.000Z

451

Anomalous temperature dependence in valence band spectra: A resonant photoemission study of layered perovskite Sr{sub 2}CoO{sub 4}  

SciTech Connect (OSTI)

Valence band spectra (VBS) and its modification across Curie temperature (T{sub C}) of Sr{sub 2}CoO{sub 4} thin film are studied using resonant photoemission spectroscopy. It is found that VBS mainly consists of hybridized states of Co-3d t{sub 2g}e{sub g} and O-2p; however, Co-3d e{sub g} states show its prominence only in the ferromagnetic temperature regime. Below T{sub C}, spectral weight transfer takes place anomalously from high binding energy (B.E.) region to low B.E. region, signifying the enhanced intermediate or low spin state Co{sup 4+} ions. It is suggested that spin-lattice coupling and many-body effects in Sr{sub 2}CoO{sub 4} derived from the strong electron correlations lead to such temperature dependence of VBS.

Pandey, Pankaj K.; Choudhary, R. J., E-mail: ram@csr.res.in; Phase, D. M. [UGC DAE Consortium for Scientific Research, University Campus, Indore 452001 (India)

2014-05-05T23:59:59.000Z

452

Influence of oxygen pressure and aging on LaAlO{sub 3} films grown by pulsed laser deposition on SrTiO{sub 3} substrates  

SciTech Connect (OSTI)

The crystal structures of LaAlO{sub 3} films grown by pulsed laser deposition on SrTiO{sub 3} substrates at oxygen pressure of 10{sup ?3} millibars or 10{sup ?5} millibars, where kinetics of ablated species hardly depend on oxygen background pressure, are compared. Our results show that the interface between LaAlO{sub 3} and SrTiO{sub 3} is sharper when the oxygen pressure is lower. Over time, the formation of various crystalline phases is observed while the crystalline thickness of the LaAlO{sub 3} layer remains unchanged. X-ray scattering as well as atomic force microscopy measurements indicate three-dimensional growth of such phases, which appear to be fed from an amorphous capping layer present in as-grown samples.

Park, Jihwey; Aeppli, Gabriel [London Centre for Nanotechnology, University College London, London WC1H 0AH (United Kingdom); Soh, Yeong-Ah, E-mail: yeongahsoh@gmail.com [London Centre for Nanotechnology, University College London, London WC1H 0AH (United Kingdom); Department of Materials, Imperial College London, London SW7 2AZ (United Kingdom); David, Adrian; Lin, Weinan [Division of Physics and Applied Physics, Nanyang Technological University, Singapore 637371 (Singapore); Wu, Tom [Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900 (Saudi Arabia)

2014-02-24T23:59:59.000Z

453

Effects of A-site composition and oxygen nonstoichiometry on the thermodynamic stability of compounds in the Ba–Sr–Co–Fe–O system  

SciTech Connect (OSTI)

The thermodynamic stability of the perovskite-type oxides in the Ba{sub x}Sr{sub 1?x}Co{sub 0.8}Fe{sub 0.2}O{sub 3??} (BSCF) system was investigated with varying Ba:Sr ratios (x=0.2, 0.4, 0.5, 0.6, 0.8) and correlated with the charge compensation mechanism and the change in the oxygen stoichiometry of the materials. Thermodynamic properties represented by the relative partial molar free energies, enthalpies and entropies of oxygen dissolution in the perovskite phase, as well as the equilibrium partial pressures of oxygen have been obtained in the temperature range of 823–1273 K using solid electrolyte electrochemical cells (EMF) method. The influence of the oxygen stoichiometry change on the thermodynamic properties was examined using a coulometric titration technique coupled with EMF measurements. The temperature dependence of enthalpy increment (H{sub T}?H{sub 298}) in the temperature range of 700–900 K was measured by drop calorimetry. The energetic parameters allow for the correlation of the structural and electrical stability with the defect structures. - Graphical abstract: Partial molar energy of oxygen dissolution (?G{sup ¯}{sub O{sub 2}}) (EMF measurements) and enthalpy increment (H{sub T}?H{sub 298}) (drop calorimetry data) of perovskite materials with the composition Ba{sub x}Sr{sub 1?x}Co{sub 0.8}Fe{sub 0.2}O{sub 3??} as a function of temperature and Barium content. Highlights: ? We report relevant data for thermodynamic stability of Ba{sub x}Sr{sub 1?x}Co{sub 1?y}Fe{sub y}O{sub 3??} compounds. ? Temperature of structural transformations is evidenced as a function of Ba content. ? Correlation between thermodynamic, electrical and structural data is investigated. ? The results are discussed based on the properties-defect structure relationship.

Tanasescu, Speranta, E-mail: stanasescu2004@yahoo.com [“Ilie Murgulescu” Institute of Physical Chemistry of Romanian Academy, Department of Chemical Thermodynamics, Splaiul Independentei 202, PO Box 12-194, 060021 Bucharest (Romania); Yáng, Zhèn, E-mail: zhen.yang@mat.ethz.ch [ETH Zurich, Nonmetallic Inorganic Materials, Department of Materials, Wolfgang-Pauli-Str. 10, CH-8093 Zurich (Switzerland); Martynczuk, Julia, E-mail: julia.martynczuk@mat.ethz.ch [ETH Zurich, Nonmetallic Inorganic Materials, Department of Materials, Wolfgang-Pauli-Str. 10, CH-8093 Zurich (Switzerland); Varazashvili, Vera, E-mail: v_varazi@yahoo.com [Ivan Javakhishvili Tbilisi State University, 11, Mindeli str., Tbilisi, 380086, Georgia (United States); Maxim, Florentina, E-mail: maxim_florentina@yahoo.com [“Ilie Murgulescu” Institute of Physical Chemistry of Romanian Academy, Department of Chemical Thermodynamics, Splaiul Independentei 202, PO Box 12-194, 060021 Bucharest (Romania); Teodorescu, Florina, E-mail: fteodorescu@icf.ro [“Ilie Murgulescu” Institute of Physical Chemistry of Romanian Academy, Department of Chemical Thermodynamics, Splaiul Independentei 202, PO Box 12-194, 060021 Bucharest (Romania); Botea, Alina, E-mail: alina.petcu30@yahoo.com [“Ilie Murgulescu” Institute of Physical Chemistry of Romanian Academy, Department of Chemical Thermodynamics, Splaiul Independentei 202, PO Box 12-194, 060021 Bucharest (Romania); Totir, Nicolae, E-mail: nicolaetotir@yahoo.com [“Ilie Murgulescu” Institute of Physical Chemistry of Romanian Academy, Department of Chemical Thermodynamics, Splaiul Independentei 202, PO Box 12-194, 060021 Bucharest (Romania); and others

2013-04-15T23:59:59.000Z

454

Syntheses and characterization of energetic compounds constructed from alkaline earth metal cations (Sr and Ba) and 1,2-bis(tetrazol-5-yl)ethane  

SciTech Connect (OSTI)

Two new energetic compounds, [M(BTE)(H{sub 2}O){sub 5}]{sub n} (M=Sr(1), Ba(2)) [H{sub 2}BTE=1,2-bis(tetrazol-5-yl)ethane], have been hydrothermally synthesized and structurally characterized. Single-crystal X-ray diffraction analyses reveal that they are isomorphous and exhibit 2D (4,4) net framework, generated by 4-connected Sr{sub 2}(H{sub 2}O){sub 10}/Ba{sub 2}(H{sub 2}O){sub 10} SBUs linked up by two independent binding modes of H{sub 2}BTE, and the resulting 2D structure is interconnected by hydrogen-bond and strong face to face {pi}-{pi} stacking interactions between two tetrazole rings to lead to a 3D supramolecular architecture. DSC measurements show that they have significant catalytic effects on thermal decomposition of ammonium perchlorate. Moreover, the photoluminescence properties, thermogravimetric analyses, and flame colors of the as-prepared compounds are also investigated in this paper. - Graphical abstract: Two novel 2D isomorphous alkaline earth metal complexes were assembled by 4-connected Sr{sub 2}(H{sub 2}O){sub 10}/Ba{sub 2}(H{sub 2}O){sub 10} SBUs and two independent binding modes of H{sub 2}BTE ligands, and the catalytic performances toward thermal decomposition of ammonium perchlorate and photoluminescent properties of them were investigated. Highlights: > Two novel alkaline earth energetic coordination polymers have been prepared.{yields} Both structures are layered based on 4-connected Sr{sub 2}(H{sub 2}O){sub 10}/Ba{sub 2}(H{sub 2}O){sub 10} SBUs and two distinct H{sub 2}BTE coordination modes.{yields} The dehydrated products of the compounds possess good thermostability and significant catalytic effects on thermal decomposition of AP.

Xia Zhengqiang [Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710069 (China); Chen Sanping, E-mail: sanpingchen@126.com [Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710069 (China); Wei Qing, E-mail: weiqq@126.com [Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710069 (China); Qiao Chengfang [Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710069 (China)

2011-07-15T23:59:59.000Z

455

Rb-Sr and Sm-Nd isotopic study of the Glen Mountains layered complex: initiation of rifting within the southern Oklahoma aulacogen  

SciTech Connect (OSTI)

Rb-Sr and Sm-Nd isotopic data for rocks and minerals of the Glen Mountains layered complex (GMLC), a midcontinent mafic layered intrusion in the Wichita Mountains of southwestern Oklahoma, constrain the time of initiation of rifting within the southern Oklahoma aulacogen and provide information on the chemistry of the early Paleozoic mantle. Four whole-rock samples define a Rb-Sr isochron corresponding to a maximum crystallization age of 577 +/- 165 Ma and an initial Sr isotopic composition of 0.70359 +/- 2. A three-point Sm-Nd mineral-whole-rock (internal) isochron for an anorthositic gabbro provides a crystallization age of 528 +/- 29 Ma. These data suggest that the GMLC was emplaced into the southern Oklahoma aulacogen during the initial phase of rifting along the southern margin of the North American craton in the early Paleozoic. This Sm-Nd internal isochron age is within analytical uncertainty of U-Pb zircon ages for granites and rhyolites from the Wichita Mountains; therefore, mafic and felsic magmatism may have been contemporaneous within the rift during the early stages of development. Hybrid rocks and composite dikes in the Wichita Mountains provide field evidence for contemporaneous mafic and felsic magmas. Initial Sr and Nd isotopic data suggest that magmas parental to the GMLC were derived from a depleted mantle source. However, Nd isotopic data for the GMLC plot distinctly below data for the depleted mantle source cited by DePaolo and thus suggest that the parental magmas of the GMLC were either contaminated by Proterozoic crust of the southern midcontinent or were derived from a heterogenous mantle source region that had variable initial Nd isotopic compositions.

Lambert, D.D.; Unruh, D.M.; Gilbert, M.C.

1988-01-01T23:59:59.000Z

456

Synthesis of single-phase Sr{sub 3}Co{sub 2}Fe{sub 24}O{sub 41} Z-type ferrite by polymerizable complex method  

SciTech Connect (OSTI)

Highlights: {yields} Single-phase Sr{sub 3}Co{sub 2}Z was obtained in a very narrow temperature range. {yields} Sr{sub 3}Co{sub 2}Z ferrite prepared by polymerizable complex method showed typical M-H curve of soft ferrite. -- Abstract: Synthesis of single-phase Sr{sub 3}Co{sub 2}Fe{sub 24}O{sub 41} Z-type (Sr{sub 3}Co{sub 2}Z) ferrite was realized by adopting the polymerizable complex method. Crystal structure of samples has been investigated by powder X-ray diffraction (XRD). Single-phase Sr{sub 3}Co{sub 2}Z ferrite was obtained by heating at 1473 K for 5 h in air. Magnetic properties were discussed by measurements of M-H curves with vibrating sample magnetometer (VSM). Sr{sub 3}Co{sub 2}Z ferrite prepared by polymerizable complex method showed typical M-H curve of soft ferrite, with a saturation magnetization of 21.5{mu}{sub B}/formula unit (50.5 emu/g) and a coercive force of 0.014 T at room temperature.

Kikuchi, Takeyuki, E-mail: kikuchi@eng.u-hyogo.ac.jp [Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo, 2167 Syosya, Himeji-shi 671-2280 (Japan)] [Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo, 2167 Syosya, Himeji-shi 671-2280 (Japan); Nakamura, Tatsuya [Department of Electrical Engineering and Computer Sciences, Graduate School of Engineering, University of Hyogo, 2167 Syosya, Himeji-shi 671-2280 (Japan)] [Department of Electrical Engineering and Computer Sciences, Graduate School of Engineering, University of Hyogo, 2167 Syosya, Himeji-shi 671-2280 (Japan); Yamasaki, Tohru [Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo, 2167 Syosya, Himeji-shi 671-2280 (Japan)] [Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo, 2167 Syosya, Himeji-shi 671-2280 (Japan); Nakanishi, Makoto; Fujii, Tatsuo; Takada, Jun [Department of Applied Chemistry, Faculty of Engineering, Okayama University, 3-1-1 Tsushima-naka, Okayama 700-8530 (Japan)] [Department of Applied Chemistry, Faculty of Engineering, Okayama University, 3-1-1 Tsushima-naka, Okayama 700-8530 (Japan); Ikeda, Yasunori [Research Institute for Production Development, 15 Morimoto-cho, Shimogamo, Sakyo-ku, Kyoto-shi, Kyoto 606-0805 (Japan)] [Research Institute for Production Development, 15 Morimoto-cho, Shimogamo, Sakyo-ku, Kyoto-shi, Kyoto 606-0805 (Japan)

2011-07-15T23:59:59.000Z

457

METHOD FOR SIMULTANEOUS 90SR AND 137CS IN-VIVO MEASUREMENTS OF SMALL ANIMALS AND OTHER ENVIRONMENTAL MEDIA DEVELOPED FOR THE CONDITIONS OF THE CHERNOBYL EXCLUSION ZONE  

SciTech Connect (OSTI)

To perform in vivo simultaneous measurements of the {sup 90}Sr and {sup 137}Cs content in the bodies of animals living in the Chernobyl Exclusion Zone (ChEZ), an appropriate method and equipment were developed and installed in a mobile gamma beta spectrometry laboratory. This technique was designed for animals of relatively small sizes (up to 50 g). The {sup 90}Sr content is measured by a beta spectrometer with a 0.1 mm thick scintillation plastic detector. The spectrum processing takes into account the fact that the measured object is 'thick-layered' and contains a comparable quantity of {sup 137}Cs, which is a characteristic condition of the ChEZ. The {sup 137}Cs content is measured by a NaI scintillation detector that is part of the combined gamma beta spectrometry system. For environmental research performed in the ChEZ, the advantages of this method and equipment (rapid measurements, capability to measure live animals directly in their habitat, and the capability of simultaneous {sup 90}Sr and {sup 137}Cs measurements) far outweigh the existing limitations (considerations must be made for background radiation and the animal size, skeletal shape and body mass). The accuracy of these in vivo measurements is shown to be consistent with standard spectrometric and radiochemical methods. Apart from the in vivo measurements, the proposed methodology, after a very simple upgrade that is also described in the article, works even more accurately with samples of other media, such as soil and plants.

Farfan, E.; Jannik, T.

2011-10-01T23:59:59.000Z

458

Low-field magnetoresistance up to 400 K in double perovskite Sr{sub 2}FeMoO{sub 6} synthesized by a citrate route  

SciTech Connect (OSTI)

A wet-chemistry technique, namely the citrate route, has been used to prepare high-quality polycrystalline samples of double perovskite Sr{sub 2}FeMoO{sub 6}. We report on the evolution of magnetic and magnetoresistive properties of the synthesized samples as a function of three parameters (i) the pH of the starting solution, (ii) the decomposition temperature of the citrate precursors and (iii) the sintering conditions. The low-field magnetoresistance (LFMR) value of our best samples is as high as 5% at room temperature for an applied magnetic field of 1 kOe. Additionally, the distinguishing feature of these samples is the persistence of LFMR, with a reasonably large value, up to 400 K which is a crucial parameter for any practical application. Our study indicates that the enhancement of LFMR observed is due to a good compromise between the grain size distribution and their magnetic polarization. -- Graphical abstract: The microstructure (left panel) and corresponding low-field magnetoresistance of one of the Sr{sub 2}FeMoO{sub 6} samples synthesized in the course of this work. Highlights: • Samples of Sr{sub 2}FeMoO{sub 6} are prepared using a citrate route under varying conditions. • Magnetoresistive properties are improved and optimized. • Low-field magnetoresitence values as large as 5% at 300 K/1 kOe are reported. • Persistence of low-field magnetoresistance up to 400 K.

Harnagea, L., E-mail: harnagealuminita@gmail.com [LPCES – ICMMO, UMR 8182 CNRS, Université Paris-Sud, 91405 Orsay Cedex (France); Jurca, B. [LPCES – ICMMO, UMR 8182 CNRS, Université Paris-Sud, 91405 Orsay Cedex (France); Physical Chemistry Department, University of Bucharest, 4-12 Bd. Elisabeta, 030018 Bucharest (Romania); Berthet, P. [LPCES – ICMMO, UMR 8182 CNRS, Université Paris-Sud, 91405 Orsay Cedex (France)

2014-03-15T23:59:59.000Z

459

The effect of Ag on the decomposition pathway of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub x} in air  

SciTech Connect (OSTI)

The decomposition pathway of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub x} (Bi2212) in .21 bar O{sub 2} with 0, 2, and 10 wt.% Ag added has been determined by performing SEM/EDS and microprobe analysis on oil quenched samples. A series of quaternary phase diagrams were constructed to describe the evolution of the phase assemblage with temperature. It was found that the first decomposition products are Bi{sub 9}Sr{sub 11}Ca{sub 5}O{sub x} (9{und 11}5), (Sr{sub 1{minus}x}Ca{sub x})CuO{sub 2} (11), and liquid. The addition of Ag acted to depress the first peritectic temperature by 16--20 C and slightly modified the order in which some of the subliquidus solid phases nucleate and decompose. The effect of C on the peritectic melting temperature was examined through thermal analysis of powder samples.

Margulies, L.; Dennis, K.W.; Kramer, M.J.; McCallum, R.W. [Ames Lab., IA (United States)]|[Iowa State Univ., Ames, IA (United States). Dept. of Materials Science and Engineering

1996-05-01T23:59:59.000Z

460

Effect of Ag on the peritectic decomposition of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub x}  

SciTech Connect (OSTI)

During the melt processing of superconducting wires and tapes a number of partial liquid phase regions are entered, and the type and amount of second phases that exist in the melt before cooling are critical in determining the microstructure of the final material. Decomposition pathway of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub x}(Bi2212) with 0, 2, and 10 wt% Ag added was examined at 1 bar PO{sub 2} by performing SAME/EDS analysis on oil quenched samples. A variety of quaternary phase diagrams were constructed to describe the evolution of the phase assemblage with temperature. At all Ag contents, Bi2212 first undergoes a peritectic reaction producing (Sr{sub 1-x}Ca{sub x}){sub 14}Cu{sub 24}O{sub 41}(14,24), Bi{sub 2}(Sr{sub 1-x}Ca{sub x}){sub 4}O{sub x}(24x), and liquid.

Margulies, L.; Dennis, K.W.; Kramer, M.J.; McCallum, R.W. [Ames Lab., IA (United States)

1995-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "js rogers sr" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
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461

Significant enhancement in thermoelectric properties of polycrystalline Pr-doped SrTiO{sub 3??} ceramics originating from nonuniform distribution of Pr dopants  

SciTech Connect (OSTI)

Recently, we have reported a significant enhancement (>70% at 500?°C) in the thermoelectric power factor (PF) of bulk polycrystalline Pr-doped SrTiO{sub 3} ceramics employing a novel synthesis strategy which led to the highest ever reported values of PF among doped polycrystalline SrTiO{sub 3}. It was found that the formation of Pr-rich grain boundary regions gives rise to an enhancement in carrier mobility. In this Letter, we investigate the electronic and thermal transport in Sr{sub 1?x}Pr{sub x}TiO{sub 3} ceramics in order to determine the optimum doping concentration and to evaluate the overall thermoelectric performance. Simultaneous enhancement in the thermoelectric power factor and reduction in thermal conductivity in these samples resulted in more than 30% improvement in the dimensionless thermoelectric figure of merit (ZT) for the whole temperature range over all previously reported maximum values. Maximum ZT value of 0.35 was obtained at 500?°C.

Dehkordi, Arash Mehdizadeh, E-mail: amehdiz@g.clemson.edu [Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634 (United States); Bhattacharya, Sriparna; He, Jian [Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634 (United States); Alshareef, Husam N. [Materials Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900 (Saudi Arabia); Tritt, Terry M., E-mail: ttritt@clemson.edu [Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634 (United States); Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634 (United States)

2014-05-12T23:59:59.000Z

462

FREQUENCY DISTRIBUTIONS OF 90SR AND 137CS CONCENTRATIONS IN AN ECOSYSTEM OF THE 'RED FOREST' AREA IN THE CHERNOBYL EXCLUSION ZONE  

SciTech Connect (OSTI)

In the most highly contaminated region of the Chernobyl Exclusion Zone: the 'Red Forest' site, the accumulation of the major dose-affecting radionuclides ({sup 90}Sr and {sup 137}Cs) within the components of an ecological system encompassing 3,000 m{sup 2} were characterized. The sampled components included soils (top 0-10 cm depth), Molina caerulea (blue moor grass), Camponotus vagus (carpenter ants) and Pelobates fuscus (spade-footed toad). In a comparison among the components of this ecosystem, the {sup 90}Sr and {sup 137}Cs concentrations measured in 40 separate grids exhibited significant differences, while the frequency distribution of the values were close to a logarithmically normal leptokurtic distribution with a significant right-side skew. While it is important to identify localized areas of high contamination or 'hot spots,' including these values in the arithmetic mean may overestimate the exposure risk. In component sample sets that exhibited logarithmically normal distribution, the geometrical mean more accurately characterizes a site. Ideally, risk assessment is most confidently achieved when the arithmetic and geometrical means are most similar, meaning the distribution approaches normal. Through bioaccumulation, the highest concentrations of {sup 90}Sr and {sup 137}Cs were measured in the blue moor grass and spade-footed toad. These components also possessed distribution parameters that shifted toward a normal distribution.

Farfan, E.; Jannik, T.; Caldwell, E.

2011-10-01T23:59:59.000Z

463

Spin and orbital Ti magnetism at LaMnO3/SrTiO3 interfaces  

SciTech Connect (OSTI)

In systems with strong electron-lattice coupling, such as manganites, orbital degeneracy is lifted, what causes a null expectation value of the orbital moment. Magnetic structure is thus determined by spin-spin superexchange. In titanates, however, with much smaller Jahn-Teller distortions, orbital degeneracy might allow non-zero values of the orbital magnetic moment. Accordingly, novel forms of ferromagnetic superexchange interaction unique to t2g electrons systems have been theoretically predicted, although their experimental observation has remained elusive. Here we report a new kind of Ti3+ ferromagnetism at LaMnO3/SrTiO3 epitaxial interfaces. It results from charge transfer to the empty conduction band of the titanate and has spin and orbital contributions evidencing the role played by orbital degeneracy. The possibility of tuning magnetic alignment (ferromagnetic or antiferromagnetic) of Ti and Mn moments by structural parameters is demonstrated. This result will provide important clues for the understanding of the effects of orbital degeneracy in superexchange coupling.

Garcial-Barriocanal, J [Universidad Complutense, Spain; Cezar, J. C. [European Synchrotron Radiation Facility (ESRF); Bruno, F. Y. [Universidad Complutense, Spain; Thakur, P. [European Synchrotron Radiation Facility (ESRF); Brookes, N. B. [European Synchrotron Radiation Facility (ESRF); Utfeld, C. [University of Bristol, UK; Riviera-Calzada, A. [Universidad Complutense, Spain; Giblin, S. R. [ISIS Facility, Rutherford Appleton Laboratory; Taylor, J. W. [ISIS Facility, Rutherford Appleton Laboratory; Duffy, J. A. [University of Warwick, UK; Dugdale, S. B. [University of Bristol, UK; Nakamura, T. [Japan Synchrotron Radiation Research Institute, SPring-8; Kodama, K. [Japan Synchrotron Radiation Research Institute, SPring-8; Leon, C. [Universidad Complutense, Spain; Okamoto, Satoshi [ORNL; Santamaria, J. [Universidad Complutense, Spain

2010-01-01T23:59:59.000Z

464

Tunable electronic structure in dilute magnetic semiconductor Sr{sub 3}SnO/c-YSZ/Si (001) epitaxial heterostructures  

SciTech Connect (OSTI)

We report a systematic study of the structural, physical, and chemical properties of epitaxial thin films of emerging dilute magnetic semiconductor (DMS) Sr{sub 3}SnO (SSO) integrated with Si (100) prepared by various post-growth annealing treatments. The transport properties of these films are primarily governed by oxygen vacancies and the results are explained with the variable-range hopping model. The increased oxygen vacancy concentration generated by post-growth vacuum annealing results in a shorter hopping distance and reduced hopping energy and Coulomb gap, leading to lower resistivity; oxygen annealing shows the opposite effects. The work function ranges from 4.54 to 4.02?eV and shows a negative linear relationship with oxygen vacancy concentration, accompanied by a 0.42?eV shift in the surface Fermi level. The transport and ultraviolet photoelectron spectroscopy probes agree quantitatively on measurement of the resistivity and surface electronic structure. The results provide a direct and consistent explanation that the property changes in the bulk and at the surface are primarily attributed to oxygen vacancies, which are believed to be the carriers in the SSO thin films. The ability to manipulate the work function and oxygen vacancy concentration in epitaxial DMS SSO thin films offers great potential for the development of spintronic devices.

Lee, Y. F.; Narayan, J.; Schwartz, J. [Department of Materials Science and Engineering, North Carolina State University, 911 Partners Way, Raleigh, North Carolina 27695-7907 (United States)

2014-10-28T23:59:59.000Z

465

Heavy d-electron Quasiparticle Interference and Real-space Electronic Structure of Sr3Ru2O7  

SciTech Connect (OSTI)

The intriguing idea that strongly interacting electrons can generate spatially inhomogeneous electronic liquid-crystalline phases is over a decade old, but these systems still represent an unexplored frontier of condensed-matter physics. One reason is that visualization of the many-body quantum states generated by the strong interactions, and of the resulting electronic phases, has not been achieved. Soft condensed-matter physics was transformed by microscopies that enabled imaging of real-space structures and patterns. A candidate technique for obtaining equivalent data in the purely electronic systems is spectroscopic imaging scanning tunnelling microscopy (SI-STM). The core challenge is to detect the tenuous but 'heavy' momentum (k)-space components of the many-body electronic state simultaneously with its real-space constituents. Sr{sub 3}Ru{sub 2}O{sub 7} provides a particularly exciting opportunity to address these issues. It possesses a very strongly renormalized 'heavy' d-electron Fermi liquid and exhibits a field-induced transition to an electronic liquid-crystalline phase. Finally, as a layered compound, it can be cleaved to present an excellent surface for SI-STM.

Lee, J.; Allan, M.P.; Wang, M.A.; Farrell, J.; Grigera, S.A.; Baumberger, F.; Davis, J.C.; Mackenzie, A.P.

2009-09-13T23:59:59.000Z

466

The Significance of Science Roger A. Pielke, Jr.  

E-Print Network [OSTI]

with nuclear plants and nuclear waste storage, with advocates and opponents of nuclear power each using science of action or deny that of their opposition. · Nuclear power has for a long time been a focus of intense

Colorado at Boulder, University of

467

BIOGRAPHICAL SKETCH: ROGER FOSDICK (B. 11/18/36)  

E-Print Network [OSTI]

University of Rio de Janeiro COPPE, Brazil (2 months) 1980 Erskine Fellow Department of Civil Engineering Planta Piloto de Ingenieria Quimica Universidad Na¸cional del Sur Bahia Blanca, Argentina (2 months) 1 Bari Bari, Italy Department of Civil Engineering and Architecture Universita degli Studi di Parma Parma

Janssen, Michel

468

Rising Tide by Daniel Sarewitz & Roger A. Pielke, Jr.  

E-Print Network [OSTI]

are well understood--and have nothing to do with global warming. Data from the Center for Research driven by our own use of fossil fuels." Such arguments have a rich pedigree. Only nine days before alternative energy sources and reducing global carbon-dioxide emission is essential. But the claim that action

Colorado at Boulder, University of

469

4-28-09_Final_Testimony_(Rogers).pdf  

Broader source: Energy.gov (indexed) [DOE]

over time-where there is significant private sector lender involvement and strong credit markets take the place of Federal assistance. Right now, in these extreme market...

470

Civil Society Must Publish Standards Documents Roger Clarke  

E-Print Network [OSTI]

society institutions to harness their resources to good effect. A very large proportion of the energies international contexts, such as the association of Institute of Electrical and Electronics Engineers (IEEE.clarke@xamax.com.au Abstract. A great deal of energy is wasted by civil society anguishing over the harm done to people

Boyer, Edmond

471

The effect of rotation on internal solitary Roger Grimshaw  

E-Print Network [OSTI]

of destroying the solitary wave solution. Instead an initial solitary- like disturbance decays into radiating waves and some dispersing radiation, 1 #12;emphasizing the central role that the solitary wave solution plays in the KdV equa- tion. Our concern here with internal solitary waves in the ocean, when

472

Sourabh V. Apte 204 Rogers Hall (541) 737 7335  

E-Print Network [OSTI]

-16, 2008. 3. Moin, P., and Apte S.V., "Large-eddy Simulation of Realistic Gas Turbine Combustors," AIAA and Validation Needs for Gas Turbine Combustors). 4. Apte, S.V., and Yang, V., "A Large-eddy Simulation Study Dynamics of Homogeneous Solid Propellant in a Rocket Motor," Combustion and Flame, Vol. 131, pp. 110

Apte, Sourabh V.

473

Nonlinear Waves Roger Grimshaw, Gennady El, Karima Khusnutdinova  

E-Print Network [OSTI]

-identity transformation B = A + (aA2 + bAxx + cAx x x0 Ad~x + d xAt) (4) where a, b, c, d are constants, can reduce (2

Khusnutdinova, Karima

474

Stone Age Distributed Computing Yuval Emek Jasmin Smula Roger Wattenhofer  

E-Print Network [OSTI]

.g. traffic), or electrical engineering (e.g. circuits). Distributed computing is the area that studies model, where nodes may exchange large messages with their neighbors, and perform arbitrary local nodes are by design below the computation and communication capabilities of Turing machines. Networked

475

S. I. Rogers A review of closed areas in the  

E-Print Network [OSTI]

of reasons, from the need to either protect high security Royal Navy ports, ensure safety near oil and gas ........................................................................................................ 13 2.3.4 Oil and gas installations

476

Roger Barga, Principal Architect External Research Microsoft Research  

E-Print Network [OSTI]

of concept Understand the potential and limitations of our technology... Develop software tools products still under development... #12;Barga, NeSC Conference, Edinburgh, March `09 How do we measure commercial and open source software, that transform processes and accelerate time to discovery... #12;Barga

Narasayya, Vivek

477

CHAPTER SIX Roger L'Estrange and the Huguenots  

E-Print Network [OSTI]

'Estrange disappeared from his London home. Traversing muddy roads and wintry seas, he first joined the duke of York the `Popish Midwife' Elizabeth Cellier (Figure 7). That L'Estrange's flight to Holland passed for cowardice

Paris-Sud XI, Université de

478

Dr. Dale S. Rogers Professor, Logistics & Supply Chain Management  

E-Print Network [OSTI]

The Future of Global Logistics #12;The Future of Global Logistics Future of Global Logistics · Introduction Chain #12;The Future of Global Logistics Introduction #12;The Future of Global Logistics Historical Milestones In Conceptualization Shifts in Logistical Thinking · Transportation Efficiency 3000BC · Total Cost

Lin, Xiaodong

479

The Honorable Harold Rogers The Honorable Daniel K. Inouye  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage »of EnergyThe Energy Department Feeds FamiliesDepartmentTheGreenThe17,ME1

480

Chris Rogers Accelerator Science and Technology Centre (ASTeC)  

E-Print Network [OSTI]

400 0.30556 4.894 3750 2 3 400 0.29393 4.17 3000 2 4 450 0.28546 5.34 2250 2 5 450 0.27859 6.36 2250 2 6 450 0.27205 4.94 2250 3 7 450 0.2658 5.61 2250 3 8 450 0.25983 6.3 2250 3 9 450 0.25413 6.97 2250 3 10 450 0.24867 7.65 2250 3 11 450 0.24344 8.31 2250 3 12 450 0.23842 9.01 2250 3 13 450 0.23361 9

McDonald, Kirk

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481

Roger D. Kornberg Polymerase, DNA, RNA, and Transcription  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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482

Microsoft PowerPoint - Session2_Rogers.pptx  

Gasoline and Diesel Fuel Update (EIA)

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483

Roger Mills County, Oklahoma: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to: navigation, searchVirginia BlueRiverwoods,RockRipple, Indiana: Energy

484

ME 6222: Manufacturing Processes and Systems Prof. J.S. Colton GIT 2011  

E-Print Network [OSTI]

solubility and porosity · Defects · Design rules · Economics #12;ME 6222: Manufacturing Processes and Systems with charge · steel making in blast furnace -mix coke with steel · Furnace material - refractory ­ high;Melting Time · Estimate by · Take into account oven efficiency ME 6222: Manufacturing Processes

Colton, Jonathan S.

485

A Review of "The Colonial American Origins of Modern Democratic Thought" by J.S. Maloy  

E-Print Network [OSTI]

of exemplary character and leadership would, Smith thought, counter exploitative colonial factions. A combination of democratic and aristocratic paradigms, augmented by an image of Virginia as a little commonwealth in its own right, informs Smith...

Scheik, William J.

2009-01-01T23:59:59.000Z

486

The Epistemic Benefit of Transient Diversity Kevin J.S. Zollman  

E-Print Network [OSTI]

or methodological approach will succeed without first attempting to apply it, study the effects of its application a problem for more traditional approaches to scientific methodology, since if everyone employs the same similar solutions (Hull, 1988; Sarkar, 1983; Solomon, 1992, 2001). Alternatively, Philip Kitcher (1990

Zollman, Kevin

487

Simulation of a concentrating PV/thermal collector using TRNSYS J.S. Coventry  

E-Print Network [OSTI]

for Sustainable Energy Systems Australian National University Canberra 0200 ACT AUSTRALIA Telephone: +61 02 6125, in particular heating, cooling and domestic hot water applications (Solar Energy Laboratory, 2000). TRNSYS equations describing the temperature dependent energy flow between the collector and surroundings. The CHAPS

488

Surface Display of MPH on Pseudomonas putida JS444 Using Ice Nucleation Protein and Its  

E-Print Network [OSTI]

Environmental Protection Bureau, Tianjin, China 5 Department of Chemical and Environmental Engineering (Shimazu et al., 2001b). These com- pounds have been implicated in several nerve and muscular diseases

Chen, Wilfred

489

Conservativism and the Scientific State of Erich Kummerfeld Kevin J.S. Zollman  

E-Print Network [OSTI]

of Philosophy Carnegie Mellon University Supported by NSF Grants SES 1026586 and SES 1254291 #12;The Scientist radical ideas runs some risk · Working on obvious advancements runs very little risk · There is some incentive to leaving the risk taking to others · This has the form of a free-rider problem · Prisoner

Zollman, Kevin

490

Microsoft Word - JS-NCHTYR6-Act1-12-Mar12.doc  

Office of Scientific and Technical Information (OSTI)

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491

(JS)_BL13 schedule S02-S03FY15HO3FINAL.xlsx  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert SouthwestTechnologies | BlandinePrinceton Plasmareactions. | EMSL (100) facets

492

A novel yellow-emitting SrAlSi{sub 4}N{sub 7}:Ce{sup 3+} phosphor for solid state lighting: Synthesis, electronic structure and photoluminescence properties  

SciTech Connect (OSTI)

Ce{sup 3+}-doped and Ce{sup 3+}/Li{sup +}-codoped SrAlSi{sub 4}N{sub 7} phosphors were synthesized by gas pressure sintering of powder mixtures of Sr{sub 3}N{sub 2}, AlN, ?-Si{sub 3}N{sub 4}, CeN and Li{sub 3}N. The phase purity, electronic crystal structure, photoluminescence properties of SrAlSi{sub 4}N{sub 7}:Ce{sup 3+}(Ce{sup 3+}/Li{sup +}) were investigated in this work. The band structure calculated by the DMol{sup 3} code shows that SrAlSi{sub 4}N{sub 7} has a direct band gap of 3.87 eV. The single crystal analysis of Ce{sup 3+}-doped SrAlSi{sub 4}N{sub 7} indicates a disordered Si/Al distribution and nitrogen vacnacy defects. SrAlSi{sub 4}N{sub 7} was identified as a major phase of the fired powders, and Sr{sub 5}Al{sub 5}Si{sub 21}N{sub 35}O{sub 2} and AlN as minor phases. Both Ce{sup 3+} and Ce{sup 3+}/Li{sup +} doped SrAlSi{sub 4}N{sub 7} phosphors can be efficiently excited by near-UV or blue light and show a broadband yellow emission peaking around 565 nm. A highest external quantum efficiency of 38.3% under the 450 nm excitation was observed for the Ce{sup 3+}/Li{sup +}-doped SrAlSi{sub 4}N{sub 7} (5 mol%). A white light LED lamp with color temperature of 6300 K and color rendering index of Ra=78 was achieved by combining Sr{sub 0.97}Al{sub 1.03}Si{sub 3.997}N/94/maccounttest14=t0005{sub 1}8193 {sub 7}:Ce{sup 3+}{sub 0.03} with a commercial blue InGaN chip. It indicates that SrAlSi{sub 4}N{sub 7}:Ce{sup 3+} is a promising yellow emitting down-conversion phosphor for white LEDs. - Graphical abstract: One-phosphor converted white light-emitting diode (LED) was fabricated by combining a blue LED chip and a yellow-emitting SrAlSi4N7:Ce{sup 3+} phosphor (see inset), which has the color rendering index of 78 and color temperature of 6300 K. - Highlights: • We reported a new yellow nitride phosphor suitable for solid state lighting. • We solved the crystal structure and evidenced a disordered Si/Al distribution. • We fabricated a high color rendering white LEDs by using a single SrAlSi4N7:Ce.

Ruan, Jian [Sialon Group, Sialon Unit, Environment and Energy Materials Division, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Laboratory of Glasses and Nanostructured Functional Materials, 122 Luoshi Road, Wuhan, Hubei 430070 (China); Xie, Rong-Jun, E-mail: Xie.Rong-Jun@nims.go.jp [Sialon Group, Sialon Unit, Environment and Energy Materials Division, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Funahashi, Shiro [Sialon Group, Sialon Unit, Environment and Energy Materials Division, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Tanaka, Yoshinori [Green Computational Materials Science Group, Global Research Center for Environment and Energy based on Nanomaterials Science (Green), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0044 (Japan); Takeda, Takashi; Suehiro, Takayuki; Hirosaki, Naoto [Sialon Group, Sialon Unit, Environment and Energy Materials Division, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Li, Yuan-Qiang [Dow Electronic Materials, 201 Washington Road, Princeton, NJ 08540 (United States)

2013-12-15T23:59:59.000Z

493

Improvement of the physical properties of novel (1 ? y) Co{sub 0.8}Cu{sub 0.2}Fe{sub 2}O{sub 4} + (y) SrTiO{sub 3} nanocomposite  

SciTech Connect (OSTI)

Graphical abstract: The ME coefficient as a function of magnetic field for the composites (1 ? y) Co{sub 0.8}Cu{sub 0.2}Fe{sub 2}O{sub 4} + (y) SrTiO{sub 3} (y = 40, 50, 60 and 80%). Highlights: ? T{sub C} and M{sub s} decrease with the increase of SrTiO{sub 3} concentration. ? The P–E hysteresis loops were observed for all compositions. ? The maximum ME coefficient was observed for the composite with 60% SrTiO{sub 3}. - Abstract: Magnetoelectric (ME) nanocomposites (1 ? y) Co{sub 0.8}Cu{sub 0.2}Fe{sub 2}O{sub 4} + (y) SrTiO{sub 3} (y = 40, 50, 60, 80 and 100%) were prepared by standard ceramic method. Phase formation was checked using X-ray diffraction analysis. Both saturation magnetization (M{sub s}) and Curie temperature (T{sub C}) decrease with increasing SrTiO{sub 3} content. Temperature dependence of the dielectric constant reveals two maxima, one about 550 K corresponds to non-stoichiometry and lattice distortions while the second around 900 K corresponds to the Curie temperature (T{sub C}). The large value of ME output is due to the strain induced by lattice distortion in the ferrite phase by Jahn–Teller ions like Cu. Hence, Jahn–Teller effect in the ferrite leads to polarization in the piezoelectric phase.

Ahmed, M.A., E-mail: moala47@hotmail.com [Materials Science Lab (1), Physics Department, Faculty of Science, Cairo University, Giza (Egypt); Mansour, S.F.; Abdo, M.A. [Physics Department, Faculty of Science, Zagazig University (Egypt)

2013-05-15T23:59:59.000Z

494

Probing local structure in the yellow phosphor LaSr[subscript 2]AlO[subscript 5]:Ce[superscript 3+], by the maximum entropy method and pair distribution function analysis  

SciTech Connect (OSTI)

The compound LaSr{sub 2}AlO{sub 5} was recently introduced as a competitive Ce{sup 3+} host material for blue-pumped yellow phosphors for use in white light emitting diodes. A crucial feature of the crystal structure of LaSr{sub 2}AlO{sub 5} is that La, which is the host site for Ce{sup 3+}, is located in the 8h positions of the I4/mcm crystal structure, a site equally shared with Sr. While the average crystal structure of LaSr{sub 2}AlO{sub 5} as revealed by Rietveld analysis of laboratory and synchrotron X-ray diffraction data suggests nothing untoward, maximum entropy method analysis of the synchrotron X-ray data reveals the existence of conspicuous non-sphericity of the electron density. Pair distribution function analysis of the data suggests that despite their occupying the same crystallographic site, La and Sr possess distinct coordination environments, and the environment around La is more compact and regular than the environment suggested by the Rietveld refinement of the average structure. The absorption and emission from Ce{sup 3+} centers is controlled by the local coordination and symmetry, and the use of powerful new tools in unraveling details of these strengthens the rational search for new phosphors for solid state white lighting.

Im, Won Bin; Page, Katharine; DenBaars, Steven P.; Seshadri, Ram (UCSB); (LANL)

2011-08-04T23:59:59.000Z

495

Magnetic structure of Sr{sub 2}Fe{sub 2}O{sub 5} brownmillerite by single-crystal Mössbauer spectroscopy  

SciTech Connect (OSTI)

In order to determine orientation of the Fe{sup 3+} magnetic moments and electric field gradient (efg) axes in the brownmillerite-type strontium ferrite structure for both iron sublattices where the efg tensor is not axially symmetric, the Mössbauer spectra of powdered and oriented single-crystal Sr{sub 2}Fe{sub 2}O{sub 5} were analyzed by solving the complete Hamiltonian for hyperfine interactions in the excited and ground states of the {sup 57}Fe nuclei. The magnetic moments of both octahedrally and tetrahedrally coordinated iron cations lie on the ac-plane of the orthorhombic unit cell and are parallel to the shortest c-axis, whilst the main efg axes are parallel to the longest crystallographic axis, b. This orientation is similar to that in Ca{sub 2}Fe{sub 2}O{sub 5}, in spite of the structural differences of strontium and calcium ferrite brownmillerites at low temperatures. - Graphical abstract: Mössbauer spectra of powdered and oriented single-crystal Sr{sub 2}Fe{sub 2}O{sub 5}, analyzed by solving the complete Hamiltonian for hyperfine interactions in the excited and ground states of the {sup 57}Fe nuclei, show that the magnetic moments of both octahedrally and tetrahedrally coordinated iron cations are parallel to the shortest c-axis of the orthorhombic brownmillerite unit cell . Display Omitted - Highlights: • Single-crystal Mössbauer spectroscopy is used to study magnetic structure of Sr{sub 2}Fe{sub 2}O{sub 5}. • Complete Hamiltonian for hyperfine interactions in excited and ground states was solved. • Fe{sup 3+} magnetic moments are parallel to the shortest crystallographic axis c. • The orientation of nuclear electric field gradient is similar to that in Ca{sub 2}Fe{sub 2}O{sub 5}.

Waerenborgh, J.C. [UCQR, IST/ITN, Instituto Superior Técnico, Universidade Técnica de Lisboa, CFMC-UL, Estrada Nacional 10, 2686-953 Sacavém (Portugal); Tsipis, E.V. [UCQR, IST/ITN, Instituto Superior Técnico, Universidade Técnica de Lisboa, CFMC-UL, Estrada Nacional 10, 2686-953 Sacavém (Portugal); Department of Materials and Ceramic Engineering, CICECO, University of Aveiro, 3810-193 Aveiro (Portugal); Auckett, J.E.; Ling, C.D. [School of Chemistry, The University of Sydney, Sydney 2006 (Australia); Kharton, V.V., E-mail: kharton@ua.pt [Department of Materials and Ceramic Engineering, CICECO, University of Aveiro, 3810-193 Aveiro (Portugal); Institute of Solid State Physics RAS, Chernogolovka 142432, Moscow Region (Russian Federation)

2013-09-15T23:59:59.000Z

496

Method of forming a dielectric thin film having low loss composition of Ba.sub.x Sr.sub.y Ca.sub.1-x-y TiO.sub.3 : Ba.sub.0.12-0.25 Sr.sub.0.35-0.47 Ca.sub.0.32-0.53 TiO.sub.3  

DOE Patents [OSTI]

A dielectric thin-film material for microwave applications, including use as a capacitor, the thin-film comprising a composition of barium strontium calcium and titanium of perovskite type (Ba.sub.x Sr.sub.y Ca.sub.1-x-y)TiO.sub.3. Also provided is a method for making a dielectric thin film of that formula over a wide compositional range through a single deposition process.

Xiang, Xiao-Dong (Alameda, CA); Chang, Hauyee (Berkeley, CA); Takeuchi, Ichiro (Albany, CA)

2000-01-01T23:59:59.000Z

497

Giant magnetoresistance due to magnetoelectric currents in Sr{sub 3}Co{sub 2}Fe{sub 24}O{sub 41} hexaferrites  

SciTech Connect (OSTI)

The giant magnetoresistance and magnetoelectric (ME) effects of Z-type hexaferrite Sr{sub 3}Co{sub 2}Fe{sub 24}O{sub 41} were investigated. The present experiments indicated that an induced magnetoelectric current in a transverse conical spin structure not only presented a nonlinear behavior with magnetic field and electric field but also depended upon a sweep rate of the applied magnetic field. More interestingly, the ME current induced magnetoresistance was measured, yielding a giant room temperature magnetoresistance of 32.2% measured at low magnetic fields (?125?Oe). These results reveal great potential for emerging applications of multifunctional magnetoelectric ferrite materials.

Wang, Xian [Department of Electrical and Computer Engineering, Center for Microwave Magnetic Materials and Integrated Circuits, Northeastern University, Boston, Massachusetts 02115 (United States); School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074 (China); Su, Zhijuan; Sokolov, Alexander; Hu, Bolin; Andalib, Parisa; Chen, Yajie, E-mail: y.chen@neu.edu; Harris, Vincent G. [Department of Electrical and Computer Engineering, Center for Microwave Magnetic Materials and Integrated Circuits, Northeastern University, Boston, Massachusetts 02115 (United States)

2014-09-15T23:59:59.000Z

498

Controlling magnetic anisotropy in La{sub 0.7}Sr{sub 0.3}MnO{sub 3} nanostructures  

SciTech Connect (OSTI)

We have developed a chlorine based dry etching process for nanopatterning the ferromagnetic oxide La{sub 0.7}Sr{sub 0.3}MnO{sub 3} (LSMO). Large arrays of millions of identical structures have been fabricated from thin LSMO films by electron-beam lithography and reactive ion etching. SQUID magnetometry demonstrates that patterned nanostructures with lateral dimensions down to 100?nm retain their full magnetization and the Curie temperature of the bulk layer. In addition, their shape anisotropy is sufficient to overcome the crystalline anisotropy of the bulk. High resolution scanning transmission electron microscopy shows that crystallinity is preserved even at the edges of the nanostructures.

Wahler, M.; Büttner, B.; Blaschek, H.-H.; Homonnay, N.; Wid, O. [Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, D-06099 Halle (Germany); O'Shea, K. J.; McGrouther, D.; MacLaren, D. A. [SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ (United Kingdom); Schmidt, G., E-mail: georg.schmidt@physik.uni-halle.de [Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, D-06099 Halle (Germany); IZM, Martin-Luther-Universität Halle-Wittenberg, D-06099 Halle (Germany)

2014-02-03T23:59:59.000Z

499

Magneto-transport in LaTi{sub 1?x}Mn{sub x}O{sub 3}/SrTiO{sub 3} oxide heterostructures  

SciTech Connect (OSTI)

We report the growth of ultrathin film of Mn doped LaTiO{sub 3} on TiO{sub 2} terminated SrTiO{sub 3} (001) substrate by pulsed laser deposition (PLD) and their electrical transport characteristics including magnetoresistance (MR). Though the replacement of Mn in LaTiO{sub 3} at the Ti site in dilute limit does not affect the metallic behaviour of films but variation in resistance is observed. Normalised resistance behaviour is explained on the basis of variation in charge carriers and increased interaction between Mn atoms in the system under investigation.

Kumar, Pramod, E-mail: pramodnpl2011@gmail.com; Dogra, Anjana, E-mail: pramodnpl2011@gmail.com; Budhani, R. C., E-mail: pramodnpl2011@gmail.com [Quantum Phenomena and Applications Division, National Physical Laboratory (CSIR), Dr. K.S. Krishnan Marg, New Delhi-110012 (India)

2014-04-24T23:59:59.000Z

500

Sequestration of Sr-90 Subsurface Contamination in the Hanford 100-N Area by Surface Infiltration of a Ca-Citrate-Phosphate Solution  

SciTech Connect (OSTI)

The objective of this project is to develop a method to emplace apatite precipitate in the 100N vadose zone, which results in sorption and ultimately incorporation of Sr-90 into the apatite structure. The Ca-citrate-PO4 solution can be infiltrated into unsaturated sediments to result in apatite precipitate to provide effective treatment of Sr-90 contamination. Microbial redistribution during solution infiltration and a high rate of citrate biodegradation for river water microbes (water used for solution infiltration) results in a relatively even spatial distribution of the citrate biodegradation rate and ultimately apatite precipitate in the sediment. Manipulation of the Ca-citrate-PO4 solution infiltration strategy can be used to result in apatite precipitate in the lower half of the vadose zone (where most of the Sr-90 is located) and within low-K layers (which are hypothesized to have higher Sr-90 concentrations). The most effective infiltration strategy to precipitate apatite at depth (and with sufficient lateral spread) was to infiltrate a high concentration solution (6 mM Ca, 15 mM citrate, 60 mM PO4) at a rapid rate (near ponded conditions), followed by rapid, then slow water infiltration. Repeated infiltration events, with sufficient time between events to allow water drainage in the sediment profile can be used to buildup the mass of apatite precipitate at greater depth. Low-K heterogeneities were effectively treated, as the higher residual water content maintained in these zones resulted in higher apatite precipitate concentration. High-K zones did not receive sufficient treatment by infiltration, although an alternative strategy of air/surfactant (foam) was demonstrated effective for targeting high-K zones. The flow rate manipulation used in this study to treat specific depths and heterogeneities are not as easy to implement at field scale due to the lack of characterization of heterogeneities and difficulty tracking the wetting front over a large subsurface area. However, the use of real-time surface and cross-borehole geophysics can be used to track the infiltrating Ca-citrate-PO4 front so some adjustments can be made in the infiltration rate to precipitate apatite in desired zones. In addition, the reactive transport code used in this study with field scale physical parameters for sediments can be used to evaluate infiltration strategies along with preliminary water infiltration tests at field scale.

Szecsody, James E.; Rockhold, Mark L.; Oostrom, Martinus; Moore, R. C.; Burns, Carolyn A.; Williams, Mark D.; Zhong, Lirong; Fruchter, Jonathan S.; McKinley, James P.; Vermeul, Vincent R.; Covert, Matthew A.; Wietsma, Thomas W.; Breshears, Andrew T.; Garcia, Ben J.

2009-03-01T23:59:59.000Z