National Library of Energy BETA

Sample records for mn wi il

  1. Table 2 -Lime use and practices on Corn, major producing states, 2001 CO GA IL IN IA KS KY MI MN MO NE NY NC ND OH PA SD TX WI Area

    E-Print Network [OSTI]

    Kammen, Daniel M.

    MO NE NY NC ND OH PA SD TX WI Area Lime applied NR 85 81 85 67 16 72 55 27 65 10 57 53 NR 70 95 3 1 50 51 Lime (tons treated acre) NR 1.0 2.1 1.9 2.5 2.1 2.4 2.0 2.6 2.8 1.5 1.9 1.1 NR 1.9 1.7 NR 0.5 2 NC ND OH PA SD TX WI Area Lime applied NR 95 90 69 18 69 71 14 77 16 76 99 NR 82 80 NR 5 58 54 Lime

  2. 50,000-Watt AM Stations IA | MB | MI | MN | NE | ND | ON | SD | WI | Station News | Owners | TV Captures | Links

    E-Print Network [OSTI]

    Allen, Gale

    that broadcast with a power of 50,000 Watts day and night. Some of these stations are what was once known50,000-Watt AM Stations IA | MB | MI | MN | NE | ND | ON | SD | WI | Station News | Owners | TV Captures | Links 50,000-Watt AM stations This list includes AM stations in the United States and Canada

  3. WI DOCUMENT RELEASE FORM

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorking WithTelecentricN A 035(92/02) nerg *4 o** 0, WF* W3 rdWI DOCUMENT

  4. iPad Price Guide -2015 Wi-Fi Only Wi-Fi/Cellular

    E-Print Network [OSTI]

    Burton, Geoffrey R.

    iPad Price Guide - 2015 Wi-Fi Only Wi-Fi/Cellular 16GB 64GB 128GB Wi-Fi Only Wi-Fi/Cellular 16GB 64, 5MP iSight Camera Available in Space Grey or Silver Capacity Wi-Fi Only £250 ex VAT £281 ex VAT Wi-Fi/Cellular in Space Grey or Silver Capacity Wi-Fi Only £187 ex VAT £219 ex VAT Wi-Fi/Cellular £266 ex VAT £297 ex VAT

  5. HoWiES: A Holistic Approach to ZigBee Assisted WiFi Energy Savings in Mobile Devices

    E-Print Network [OSTI]

    Li, Qun

    HoWiES: A Holistic Approach to ZigBee Assisted WiFi Energy Savings in Mobile Devices Yifan ZhangWiES, a system that saves energy consumed by WiFi interfaces in mobile devices with the assistance of ZigBee radios. The core component of HoWiES is a WiFi- ZigBee message delivery scheme that enables WiFi radios

  6. WI Windinvest | 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 Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OFAMERICA'SHeavyAgencyTendo New EnergyWindState Grid JV Jump to:doEnergyWE2WI

  7. US ENC WI Site Consumption

    Gasoline and Diesel Fuel Update (EIA)

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustments (Billion Cubic Feet) Wyoming963 1.969 1.979Coal Consumers inYear JanSales Type: Sales120 US ENC WI

  8. Grande Wi-Fi : understanding what Wi-Fi users are doing in coffee-shops

    E-Print Network [OSTI]

    Gupta, Neeti

    2004-01-01

    The relationship between coffee-shops and Internet has recently been highlighted by the launch of wireless "hotspots" which provides e-access through Wi-Fi technology, in coffee-shops and several other public places in ...

  9. Airshark: Detecting Non-WiFi RF Devices using Commodity WiFi Hardware

    E-Print Network [OSTI]

    Banerjee, Suman

    .g., ZigBee, analog cordless phone), frequency hoppers (e.g., Bluetooth, game controllers like Xbox monitors), wireless game controllers (Xbox and Wii), various ZigBee devices (e.g., Permission to make Phone Videocam Microwave Xbox Zigbee Figure 1: Degradation in UDP throughput of a good quality WiFi link

  10. Pricing WiFi at Starbucks Issues in Online Mechanism Eric J. Friedman

    E-Print Network [OSTI]

    Chen, Yiling

    Pricing WiFi at Starbucks Issues in Online Mechanism Design Eric J. Friedman David C. Parkes motivating scenarios: WiFi at Starbucks: Consider the pricing of WiFi at a cafe1 with a limited number

  11. UPPER DES PLAINES RIVER AND TRIBUTARIES, IL & WI FLOOD RISK MANAGEMENT AND ECOSYSTEM RESTORATION PROJECT

    E-Print Network [OSTI]

    US Army Corps of Engineers

    -structural FRM measures for 400 structures, to include flood-proofing, structure elevation, or buyout and removal

  12. Tracking Human Mobility Using WiFi Signals

    E-Print Network [OSTI]

    Sapiezynski, Piotr

    We study six months of human mobility data, including WiFi and GPS traces recorded with high temporal resolution, and find that time series of WiFi scans contain a strong latent location signal. In fact, due to inherent ...

  13. Energy Efficient Wi-Fi Management for Smart Devices

    E-Print Network [OSTI]

    Boutaba, Raouf

    Energy Efficient Wi-Fi Management for Smart Devices Jian Li, Jin Xiao, Huu Nhat Minh Nguyen, James-Fi is a major supporting technology and as such, efficient energy management solutions are much needed Wi-Fi energy management is a very important practical problem for smart phones. As it stands today

  14. WI Biodiesel Blending Progream Final Report

    SciTech Connect (OSTI)

    Redmond, Maria E; Levy, Megan M

    2013-04-01

    The Wisconsin State Energy Office?¢????s (SEO) primary mission is to implement cost?¢???effective, reliable, balanced, and environmentally?¢???friendly clean energy projects. To support this mission the Wisconsin Biodiesel Blending Program was created to financially support the installation infrastructure necessary to directly sustain biodiesel blending and distribution at petroleum terminal facilities throughout Wisconsin. The SEO secured a federal directed award of $600,000 over 2.25 years. With these funds, the SEO supported the construction of inline biodiesel blending facilities at two petroleum terminals in Wisconsin. The Federal funding provided through the state provided a little less than half of the necessary investment to construct the terminals, with the balance put forth by the partners. Wisconsin is now home to two new biodiesel blending terminals. Fusion Renewables on Jones Island (in the City of Milwaukee) will offer a B100 blend to both bulk and retail customers. CITGO is currently providing a B5 blend to all customers at their Granville, WI terminal north of the City of Milwaukee.

  15. IL NUOVO CIMENTO Vol. ?, N. ? ? The Liverpool Telescope Automatic Pipeline for Realtime GRB

    E-Print Network [OSTI]

    Gomboc, Andreja

    IL NUOVO CIMENTO Vol. ?, N. ? ? The Liverpool Telescope Automatic Pipeline for Real­time GRB pipeline. PACS 95.55.Cs -- Ground­based ultraviolet, optical and infrared telescopes. PACS 95.75.Mn of the system is the subsequent pipelined data reduction, analysis and automatic identification of possible GRB

  16. Prot. 413 / Visto il R

    E-Print Network [OSTI]

    Di Pillo, Gianni

    bibli l'art. 13 del ONE PER IL L'UNIVERSIT IMENTO DI R "TEATRO N ROCEDURA C ribuzioni de D. R. n. 135

  17. WiPrint: 3D Printing Your Wireless Coverage Author: Justin Chan

    E-Print Network [OSTI]

    WiPrint: 3D Printing Your Wireless Coverage Author: Justin Chan Advisor: Xia Zhou Dartmouth WiPrint, a novel approach to customiz- ing wireless signal maps using 3D printed glossy reflectors

  18. Exploiting ZigBee in Reducing WiFi Power Consumption for Mobile Devices

    E-Print Network [OSTI]

    Li, Qun

    Exploiting ZigBee in Reducing WiFi Power Consumption for Mobile Devices Yifan Zhang and Qun Li in mobile devices with the assistance of ZigBee radios. The core component of HoWiES is a WiFi-ZigBee message delivery scheme that enables WiFi radios to convey different messages to ZigBee radios in mobile

  19. @_jon_bell_WiC May 14, 2013 A Large-Scale, Longitudinal

    E-Print Network [OSTI]

    Kaiser, Gail E.

    Achievements Professions 5 #12;@_jon_bell_WiC May 14, 2013 WoW: Quantitative Data In-game "Demographics" Guild, Class, Race, Level Quests Achievements Professions Raids 5 #12;@_jon_bell_WiC May 14 Achievements Professions Raids Companions 5 #12;@_jon_bell_WiC May 14, 2013 WoW: Quantitative Data In

  20. UNIVERSITY OF CALGARY Integration of WiFi and MEMS Sensors for Indoor Navigation

    E-Print Network [OSTI]

    Calgary, University of

    UNIVERSITY OF CALGARY Integration of WiFi and MEMS Sensors for Indoor Navigation by Yuan Zhuang of MEMS sensors and WiFi offer an efficient integration for indoor navigation applications. Two automatic-coupled) integration and TC (Tightly-coupled) integration are implemented for WiFi and MEMS sensors to further limit

  1. Application-Centric Wi-Fi Energy Management on Smart Phone

    E-Print Network [OSTI]

    Boutaba, Raouf

    Application-Centric Wi-Fi Energy Management on Smart Phone Jian Li Computer Science and Engineering-Fi energy consumption, and propose three energy management schemes: 1) Dynamic control of Wi-Fi on and solution prototyping, we show the effectiveness of device side Wi-Fi energy management and the importance

  2. Destination Choice Model including panel data using WiFi localization in a pedestrian facility

    E-Print Network [OSTI]

    Bierlaire, Michel

    Destination Choice Model including panel data using WiFi localization in a pedestrian facility Loc data using WiFi localization in a pedestrian facility April 2015 EPFL Destination Choice Model including panel data using WiFi localization in a pedestrian facility Loc Tinguely, Antonin Danalet

  3. CRAD, NNSA- Maintenance (MN)

    Broader source: Energy.gov [DOE]

    CRAD for Maintenance (MN). Criteria Review and Approach Documents (CRADs) that can be used to conduct a well-organized and thorough assessment of elements of safety and health programs.

  4. WiFi Localization Experiments with an Unmanned Aircraft System

    E-Print Network [OSTI]

    Frew, Eric W.

    .15.4, specifically the ZigBee standard. Their work utilized the ratio of signal strength measurements between two to localize ZigBee radios. This paper utilizes the unscented Kalman filter (UKF)8 to perform WiFi source geo

  5. Rubbiatron, il reattore da Nobel

    E-Print Network [OSTI]

    Cappon, M

    1998-01-01

    Produrr\\ {a} 30 volte l'energia immessa, ma in modo pulito e sicuro: \\ {e} la centrale nucleare del prossimo millenio, secondo il progretto revoluzionario di Carlo Rubbia.

  6. Characterization of interleukin-15 (IL-15) and the IL-15 receptor complex

    SciTech Connect (OSTI)

    Kennedy, M.K.; Park, L.S.

    1996-05-01

    IL-15 interacts with a heterotrimeric receptor that consists of the {beta} and {gamma} subunits of the IL-2 receptor (IL-2R) as well as a specific, high-affinity IL-15-binding subunit, which is designated IL-15R{alpha}. Since both the {beta} and the {gamma} subunits of the IL-2R are required for signaling by either IL-2 or IL-15, it is not surprising that these cytokines share many activities in vitro. However, the differential expression of these cytokines and the {alpha} chains of their receptors within various tissues and cell types suggests that IL-2 and IL-15 may perform at least partially distinct physiological functions. The production of IL-15 by macrophages, and possibly other cell types, in response to environmental stimuli and infectious agents suggests that IL-15 may play a role in protective immune responses, allograft rejection, and the pathogenesis of autoimmune diseases. 56 refs.

  7. Measured lifetimes of metastable levels of Mn X, Mn XI, Mn XII, and Mn XIII ions

    E-Print Network [OSTI]

    Moehs, D. P.; Church, David A.

    1999-01-01

    An ion storage technique, based on the capture of metastable multiply charged ions from an external ion source into a Kingdon ion trap, has been used to measure the lifetimes of eight metastable levels of Mn ions with 3s(2)3p(k) configurations, k...

  8. AVETE PROGETTI PER IL FUTURO?

    E-Print Network [OSTI]

    De Cindio, Fiorella

    areas of technology: Biological and biomimetic materials; Polymers and polymer science; ElectronicAVETE PROGETTI PER IL FUTURO? Science and Technology ReSeaRch on advanced maTeRialS #12;BANDI 2009. To underline the recent scientific and technological progress made, people talk increasingly often of knowledge

  9. Equazioni contro il cancro a comunit scientifica

    E-Print Network [OSTI]

    Bellomo, Nicola

    descrivere fenomeni di grande interesse legati a specifiche te- rapie. A esempio, una collabo- razione tra il

  10. Il pumping lemma Proprieta' di chiusura

    E-Print Network [OSTI]

    Rossi, Francesca

    Il pumping lemma Proprieta' di chiusura Proprieta' di decisione Proprieta' dei linguaggi regolari Proprieta' dei linguaggi regolari #12;Il pumping lemma Proprieta' di chiusura Proprieta' di decisione Proprieta' dei Linguaggi regolari Pumping Lemma. Ogni linguaggio regolare soddisfa il pumping lemma. Se

  11. Device Association Through Passive Wi-Fi Monitoring

    E-Print Network [OSTI]

    Taghavi, Travis

    2013-09-28

    sensing node. Any reasonably powered computer, from a full desktop to a simple single-board computer, is powerful enough to perform the tasks necessary for this project. For ease of use and convenience, we employ Intel's Next Unit of Computing (NUC...) for use in data 6 collection. The NUC has sufficient power to perform the necessary operations, and has the advantage of a small form-factor. Since smartphones and laptops are ubiquitous and are commonly Wi-Fi enabled, they are used as the wireless...

  12. EnWi Etec GmbH | 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 Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EA Jump to:of theClimateElgin, Illinois:JVEmpirefoundersEnWi Etec GmbH

  13. Structural and Biophysical Studies of the Human IL-7/IL-7R[alpha] Complex

    SciTech Connect (OSTI)

    McElroy, Craig A.; Dohm, Julie A.; Walsh, Scott T.R.; (OSU); (UPENN)

    2009-03-06

    IL-7 and IL-7R{alpha} bind the {gamma}{sub c} receptor, forming a complex crucial to several signaling cascades leading to the development and homeostasis of T and B cells. We report that the IL-7R{alpha} ectodomain uses glycosylation to modulate its binding constants to IL-7, unlike the other receptors in the {gamma}{sub c} family. IL-7 binds glycosylated IL-7R{alpha} 300-fold more tightly than unglycosylated IL-7R{alpha}, and the enhanced affinity is attributed primarily to an accelerated on rate. Structural comparison of IL-7 in complex to both forms of IL-7R{alpha} reveals that glycosylation does not participate directly in the binding interface. The SCID mutations of IL-7R{alpha} locate outside the binding interface with IL-7, suggesting that the expressed mutations cause protein folding defects in IL-7R{alpha}. The IL-7/IL-7R{alpha} structures provide a window into the molecular recognition events of the IL-7 signaling cascade and provide sites to target for designing new therapeutics to treat IL-7-related diseases.

  14. IL

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-SessionsSouth DakotaRobbins and MyersHr. Anthony V. Andolina:I * .z-y:c* -7f:; /

  15. Performance Analysis of Periodic Busy Tones Protecting a ZigBee Network from Wi-Fi

    E-Print Network [OSTI]

    Bahk, Saewoong

    Performance Analysis of Periodic Busy Tones Protecting a ZigBee Network from Wi-Fi Interruption--Generating a busy tone is known as a good solution that enables a ZigBee network to coexist with any Wi-Fi network in the same ISM band. To generate a busy tone, ZigBee networks need to deploy a signaler that transmits

  16. Energy Aware Scheduling and Queue Management for Next Generation Wi-Fi Routers

    E-Print Network [OSTI]

    Atiquzzaman, Mohammed

    wireless routers by considering performance metrics such as throughput and energy usage of multi-band Wi and their energy usages must be taken into account not to waste power. However, the current MWRs neither considerEnergy Aware Scheduling and Queue Management for Next Generation Wi-Fi Routers Husnu S. Narman

  17. c 2011 Kurchi Subhra Hazra GROUP FORMATION AND COMMUNICATION IN MOBILE WI-FI

    E-Print Network [OSTI]

    Nahrstedt, Klara

    c 2011 Kurchi Subhra Hazra #12;GROUP FORMATION AND COMMUNICATION IN MOBILE WI-FI NETWORKS BY KURCHI of Science in Computer Science in the Graduate College of the University of Illinois at Urbana-Champaign, 2011 Urbana, Illinois Adviser: Professor Klara Nahrstedt #12;ABSTRACT Use of Wi-Fi-capable mobile

  18. Avoiding the Rush Hours: WiFi Energy Management via Traffic Isolation

    E-Print Network [OSTI]

    Shihada, Basem

    Avoiding the Rush Hours: WiFi Energy Management via Traffic Isolation Justin Manweiler Duke in a proportional decrease in battery life. We design SleepWell, a system that achieves energy efficiency by evading to turn off the de- vice whenever beneficial. While WiFi energy efficiency has progressively improved

  19. Exposure assessment of Electromagnetic Fields from Wireless Computer Networks (Wi-Fi); Phase 1 Laboratory Measurements

    E-Print Network [OSTI]

    Haddadi, Hamed

    Exposure assessment of Electromagnetic Fields from Wireless Computer Networks (Wi-Fi); Phase 1 networks, the most popular Wi-Fi devices used in the schools were identified. The regulatory standards bisecting the screen and keyboard. The maximum electric field strength recorded at 1 m varied from 719 mVm-1

  20. Wireless LANs: outline wireless 802.11 and WiFi.

    E-Print Network [OSTI]

    Biagioni, Edoardo S.

    Wireless LANs: outline wireless 802.11 and WiFi. 802.11 security: WEP, 802.11i, WPA, WPA2. networking security wireless ad-hoc and mesh networks #12;ISM bands to operate most radios, a license availability of the 2.4GHz ISM band, many applications have been developed for it #12;Wireless 802.11/Wi

  1. US ENC IL Site Consumption

    Gasoline and Diesel Fuel Update (EIA)

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustments (Billion Cubic Feet) Wyoming963 1.969 1.979Coal Consumers inYear JanSales Type: Sales AlabamaPanelIL

  2. SMART GRID: IL RUOLO DELLA REGOLAZIONE

    E-Print Network [OSTI]

    SMART GRID: IL RUOLO DELLA REGOLAZIONE Luca Lo Schiavo Autorit per l'energia elettrica e il gas; storage, idrogeno, etc. Nuove applicazioni elettriche (es. veicoli elettrici) Fiscalit Quadro & system management a livello micro Diffusione veicoli elettrici Scenario plausibile con prezzi CO2

  3. Replacing cellular with WiFi direct communication for a highly interactive, high bandwidth multiplayer game

    E-Print Network [OSTI]

    Ortiz, Pablo (Pablo Jose)

    2013-01-01

    The objective of this work is to explore the benefits of replacing cellular with Wi-Fi Direct communication in mobile applications. Cellular connections consume significant power on mobile devices and are too slow for many ...

  4. Synthesis and Electrochemistry of Li3MnO4: Mn in the +5 Oxidation State

    E-Print Network [OSTI]

    Saint, Juliette.A.; Doeff, Marca M.; Reed, John

    2008-01-01

    Synthesis and Electrochemistry of Li 3 MnO 4 : Mn in the +5A study describing the electrochemistry of Li 2 MnO 3 in ainvestigation into the electrochemistry of this system

  5. Francesco Cangiullo e il "suo" Teatro della Sorpresa (1921)

    E-Print Network [OSTI]

    Musella, Mario

    2012-01-01

    le quali [i]l maggior nemico del riso lemozione . . .naturale. Henri Bergson, Il Riso. Saggio sul significatoma soprattutto si molto riso ed il pubblico ha dovuto

  6. Highly Active Yeast MnSOD has a Novel Mechanism Involving Six-coordinate Mn(3+) Species

    E-Print Network [OSTI]

    Sheng, Yuewei

    2012-01-01

    2009) Functional roles of the tetramer organization of malicGrez, M. (2010) Dimer-tetramer transition controls RUNX1/ETOdimer, ) MnMn (A/C, tetramer, ) MnMn (A/D, tetramer,

  7. Balance the reaction MnO4 (aq) MnO2(s) + SO4

    E-Print Network [OSTI]

    Peterson, Kirk A.

    Balance the reaction MnO4 (aq) + SO3 2 (aq) MnO2(s) + SO4 2 (aq) in basic solution Oxidation 2 SO4 2 (b) 2) These are already balanced in Mn and S 3) Balance O in (a) by adding H2Os to the right-hand-side MnO4 MnO2 + 2H2O 4) Balance H by adding H + to the left-hand-side MnO4 + 4H + MnO2

  8. Co-evolution of an emerging mobile technology and mobile services : a study of the distributed governance of technological innovation through the case of WiBro in South Korea

    E-Print Network [OSTI]

    Suh, Jee Hyun

    2014-11-26

    This thesis is a study of the development and uptake of an emerging infrastructural technology: the mobile Wireless Broadband technology and service known as WiBro in South Korea, and Mobile WiMAX internationally. WiBro ...

  9. WiFi Epidemiology: Can Your Neighbors' Router Make Yours Sick?

    E-Print Network [OSTI]

    Hu, Hao; Colizza, Vittoria; Vespignani, Alessandro

    2007-01-01

    In densely populated urban areas WiFi routers form a tightly interconnected proximity network that can be exploited as a substrate for the spreading of malware able to launch massive fraudulent attack and affect entire urban areas WiFi networks. In this paper we consider several scenarios for the deployment of malware that spreads solely over the wireless channel of major urban areas in the US. We develop an epidemiological model that takes into consideration prevalent security flaws on these routers. The spread of such a contagion is simulated on real-world data for geo-referenced wireless routers. We uncover a major weakness of WiFi networks in that most of the simulated scenarios show tens of thousands of routers infected in as little time as two weeks, with the majority of the infections occurring in the first 24 to 48 hours. We indicate possible containment and prevention measure to limit the eventual harm of such an attack.

  10. ZIMO: Building Cross-Technology MIMO to Harmonize ZigBee Smog with WiFi Flash without Intervention

    E-Print Network [OSTI]

    Li, Xiang-Yang

    ZIMO: Building Cross-Technology MIMO to Harmonize ZigBee Smog with WiFi Flash without Intervention a ma- jor problem for low power urban sensing technology ZigBee networks. Existing approaches for dealing with such inter- ferences often modify either the ZigBee nodes or WiFi nodes. However, massive

  11. Mines&Guest&Wi+Fi&Access&Request& Page%1%of%2% % %%%%%Mines%Guest%Wi2Fi%Access%Request%(212FEB22014)%

    E-Print Network [OSTI]

    ,%also%known%as%CCIT,%a%provides%access%to%the% Mines%data%wireless%network%(Wi2Fi)%free%of%charge%and%password%that%can%be%given%to%the%guest.%% The%guest%will%need%to%connect%his%or%her%computer%to%the%`CSMguest'%wireless%network%activities%not%sponsored%by%Mines.%The%attached%form%should% be%used%to%request%network%access%for%guests%to%Mines.%Please%contact%CCIT's%networking

  12. IL DIRETTORE Visto il Regolamento per il reclutamento di Ricercatori con contratto a tempo Determinato emanato con D.R.

    E-Print Network [OSTI]

    Di Pillo, Gianni

    Regione Lazio Viste le Delibere del Consiglio del Dipartimento di Fisiologia e Farmacologia "Vittorio ottobre 2010; VISTA la delibera del Consiglio di Dipartimento di Fisiologia e Farmacologia "Vittorio", settore scientifico disciplinare BIO/09, presso il Dipartimento di Fisiologia e Farmacologia "Vittorio

  13. Curcumin blocks interleukin (IL)-2 signaling in T-lymphocytes by inhibiting IL-2 synthesis, CD25 expression, and IL-2 receptor signaling

    SciTech Connect (OSTI)

    Forward, Nicholas A.; Conrad, David M.; Power Coombs, Melanie R.; Doucette, Carolyn D.; Furlong, Suzanne J.; Lin, Tong-Jun; Department of Pediatrics, Dalhousie University, Halifax, Nova Scotia ; Hoskin, David W.

    2011-04-22

    Highlights: {yields} Curcumin inhibits CD4{sup +} T-lymphocyte proliferation. {yields} Curcumin inhibits interleukin-2 (IL-2) synthesis and CD25 expression by CD4{sup +} T-lymphocytes. {yields} Curcumin interferes with IL-2 receptor signaling by inhibiting JAK3 and STAT5 phosphorylation. {yields} IL-2-dependent regulatory T-lymphocyte function and Foxp3 expression is downregulated by curcumin. -- Abstract: Curcumin (diferulomethane) is the principal curcuminoid in the spice tumeric and a potent inhibitor of activation-induced T-lymphocyte proliferation; however, the molecular basis of this immunosuppressive effect has not been well studied. Here we show that micromolar concentrations of curcumin inhibited DNA synthesis by mouse CD4{sup +} T-lymphocytes, as well as interleukin-2 (IL-2) and CD25 ({alpha} chain of the high affinity IL-2 receptor) expression in response to antibody-mediated cross-linking of CD3 and CD28. Curcumin acted downstream of protein kinase C activation and intracellular Ca{sup 2+} release to inhibit I{kappa}B phosphorylation, which is required for nuclear translocation of the transcription factor NF{kappa}B. In addition, IL-2-dependent DNA synthesis by mouse CTLL-2 cells, but not constitutive CD25 expression, was impaired in the presence of curcumin, which demonstrated an inhibitory effect on IL-2 receptor (IL-2R) signaling. IL-2-induced phosphorylation of STAT5A and JAK3, but not JAK1, was diminished in the presence of curcumin, indicating inhibition of critical proximal events in IL-2R signaling. In line with the inhibitory action of curcumin on IL-2R signaling, pretreatment of CD4{sup +}CD25{sup +} regulatory T-cells with curcumin downregulated suppressor function, as well as forkhead box p3 (Foxp3) expression. We conclude that curcumin inhibits IL-2 signaling by reducing available IL-2 and high affinity IL-2R, as well as interfering with IL-2R signaling.

  14. Wood River Levee Reconstruction, Madison County, IL

    E-Print Network [OSTI]

    US Army Corps of Engineers

    Wood River Levee Reconstruction, Madison County, IL 25 October 2006 Abstract: The recommended plan provides for flood damage reduction and restores the original degree of protection of the Wood River Levee-federal sponsor is the Wood River Drainage and Levee District. The Wood River Levee System was authorized

  15. Mi piacciono i colori, ma non proprio tutti. Mi piace il bianco del sole sulla faccia quando sto a occhi chiusi nel cortile. Il verde

    E-Print Network [OSTI]

    Frosini, Patrizio

    ridevano, sbirciando a tratti il tipo coi crisantemi. Un riso nero e sguaiato. Uno di loro mimava il mazzo

  16. Wi$eUp Financial Education for Generation X and Y Women

    E-Print Network [OSTI]

    of Labor Women's Bureau, Texas A&M AgriLife Extension Service developed Wi$eUp, an eight-module financial planning, insurance and risk management, credit and debt management, retirement planning, and other relevant topics. Although the program through the U.S. Department of Labor has officially ended, Agri

  17. Interconnecting WiFi Devices with IEEE 802.15.4 Devices without Using a Gateway

    E-Print Network [OSTI]

    Gnawali, Omprakash

    to bridge between the low power IEEE 802.15.4 network and the Internet. The bridge has at least two at a smart home, the user may use a smartphone and send command over WiFi to the gateway, often through smart home automation applications are non-interactive. Yet, they require Internet access either

  18. Geophysical Surveying with Marine Networked Mobile Robotic Systems: The WiMUST Project

    E-Print Network [OSTI]

    Jesus, Srgio M.

    Geophysical Surveying with Marine Networked Mobile Robotic Systems: The WiMUST Project [Extended for geophysical surveying. This paper describes the main features of the envisaged developments, with a focus.00. Figure 1: Conventional geophysical surveying using long lines of towed streamers team. Such teams

  19. WizSync: Exploiting Wi-Fi Infrastructure for Clock Synchronization in Wireless Sensor Networks

    E-Print Network [OSTI]

    Xing, Guoliang

    synchronization approach by exploiting the existing Wi-Fi infrastructure. Our approach leverages the fact that ZigBee unlicensed spectrum. As a result, a ZigBee node can detect and synchronize to the periodic beacons standards such as Bluetooth and 802.15.4/ZigBee, which also adopt the 2.4 GHz unlicensed spectrum

  20. PowerGuide: Accurate Wi-Fi Power Estimator for Smartphones

    E-Print Network [OSTI]

    Boutaba, Raouf

    years. Wi- Fi energy consumption is a significant portion of smartphone energy usage [1]. Therefore][3] provide the solution for profiling the energy usages per smartphone application, but only restricted School of Computer Science, University of Waterloo, Canada email: rboutaba@cs.uwaterloo.ca Higher School

  1. RuralNet (Digital Gangetic Plains): WiFi-Based Low-Cost Rural

    E-Print Network [OSTI]

    Raman, Bhaskaran

    RuralNet (Digital Gangetic Plains): WiFi-Based Low-Cost Rural Networking Bhaskaran Raman Department in the west This business model can thrive when average per capita income is high ($20K) Wireless systems being deployed in India are successful in Metro pockets, but providing cost effective voice and data

  2. Analysis of a Mixed-Use Urban WiFi Network: When Metropolitan becomes Neapolitan

    E-Print Network [OSTI]

    Snoeren, Alex

    spectrum. We study the usage of the Google WiFi network de- ployed in Mountain View, California, and find that copies are not made or distributed for profit or commercial advantage and that copies bear this notice- able outdoor wireless Internet service deployed in Mountain View, California, consisting of over 500

  3. WiSARDNet FIELD-TO-DESKTOP: BUILDING A WIRELESS CYBERINFRASTRUCTURE FOR

    E-Print Network [OSTI]

    , and Paul Flikkema1 1 Wireless Networks Research Laboratory, Department of Electrical Engineering, Northern1 WiSARDNet FIELD-TO-DESKTOP: BUILDING A WIRELESS CYBERINFRASTRUCTURE FOR ENVIRONMENTAL MONITORING - The technology of wireless sensor networks has enabled new levels of spatial coverage and density

  4. BreezChirp: Energy Efficient Wi-Fi Bandwidth Estimator for Smartphones

    E-Print Network [OSTI]

    Boutaba, Raouf

    Center) support program supervised by the NIPA(National IT Industry Promotion Agency) (NIPA-2013-H0301BreezChirp: Energy Efficient Wi-Fi Bandwidth Estimator for Smartphones Jian Li, Jin Xiao, Huu Nhat Science, University of Waterloo, Canada email: rboutaba@cs.uwaterloo.ca Faculty of Computer Science

  5. Pressure-Compensated Hydrogen Fuel Cell WiSys Prototype Development Fund

    E-Print Network [OSTI]

    Wu, Mingshen

    Pressure-Compensated Hydrogen Fuel Cell WiSys Prototype Development Fund Final Report Principal Description The purpose of this project was to reduce-to-practice the pressure-compensated hydrogen fuel cell the performance of the new fuel cell innovation against proven strategies. The pressure-compensated fuel cell

  6. UNLV OFFICE OF INFORMATION TECHNOLOGY WIRELESS NETWORK (Wi-Fi) POLICY

    E-Print Network [OSTI]

    Walker, Lawrence R.

    UNLV OFFICE OF INFORMATION TECHNOLOGY WIRELESS NETWORK (Wi-Fi) POLICY RESPONsmLE ADMINISTRATOR: VICE PROVOST FOR INFORMATION TECHNOLOGY RESPONsmLE OFFICE(S): OFFICE OF THE VICE PROVOST FOR INFORMATION TECHNOLOGY ORIGINALLY IsSUED: OCTOBER 2012 APPROVALS: APPROVEDBY: \\

  7. Saving Energy on WiFi With Required IPsec Youngsang Shin, Steven Myers, and Minaxi Gupta

    E-Print Network [OSTI]

    Gupta, Minaxi

    Saving Energy on WiFi With Required IPsec Youngsang Shin, Steven Myers, and Minaxi Gupta School a transitory network connection due to mobility or energy-saving protocols. In this work we study the ability savings. Energy savings come from power-cycling the wireless radio when it is not in use. More

  8. WiSARDNET: A SYSTEM SOLUTION FOR HIGH PERFORMANCE IN SITU ENVIRONMENTAL MONITORING

    E-Print Network [OSTI]

    Laboratory Department of Electrical Engineering Northern Arizona University ABSTRACT WiSARDNet (Wireless Bill Ruggeri Paul G. Flikkema Daniel Johnson Michael Wright Kun Xia Wireless Networks Research Sensing and Relay Device Network) is an ad hoc wireless sensor network optimized for dense in situ spatio

  9. Structural And Physical Characterization of Tetranuclear [Mn**II(3)Mn**IV] And [Mn**II(2)Mn**III(2)] Valence-Isomer Manganese Complexes

    SciTech Connect (OSTI)

    Zaleski, C.M.; Weng, T.-C.; Dendrinou-Samara, C.; Alexiou, M.; Kanakaraki, P.; Hsieh, W.-Y.; Kampf, J.; Penner-Hahn, J.E.; Pecoraro, V.L.; Kessissoglou, D.P.

    2009-05-28

    Two tetranuclear Mn complexes with an average Mn oxidation state of +2.5 have been prepared. These valence isomers have been characterized by a combination of X-ray crystallography, X-ray absorption spectroscopy, and magnetic susceptibility. The Mn{sup II}{sub 3}Mn{sup IV} tetramer has the Mn ions arranged in a distorted tetrahedron, with an S = 6 ground spin state, dominated by ferromagnetic exchange among the manganese ions. The Mn{sup II}{sub 2}Mn{sup III}{sub 2} tetramer also has a distorted tetrahedral arrangement of Mn ions but shows magnetic behavior, suggesting that it is a single-molecule magnet. The X-ray absorption near-edge structure (XANES) spectra for the two complexes are similar, suggesting that, while Mn XANES has sufficient sensitivity to distinguish between trinuclear valence isomers (Alexiou et al. Inorg. Chem. 2003, 42, 2185), similar distinctions are difficult for tetranuclear complexes such as that found in the photosynthetic oxygen-evolving complex.

  10. Mn/DOT's Project Peer Review

    E-Print Network [OSTI]

    Minnesota, University of

    issue we share with peers) Benchmark Mn/DOT's project management practices Initial step in a change decision- making Able to manage project change #12;Project Management Opportunities and Challenges TheMn/DOT's Project Management Peer Review Creating a Project Management Culture 2010 CTS Research

  11. CAROLYN R. MNICHOWICZ P O B OX 6 06 M ENO MO N I E, WI 54 7 51

    E-Print Network [OSTI]

    Wu, Mingshen

    the Dunn County Criminal Justice Collaboration Council Review policies and practices and monitor need Development and Family Studies May, 2003 University Wisconsin Stout Menomonie, WI WORK EXPERIENCE September in corrections and court programming Criminal Justice Collaboration Council Evaluation Subcommittee Chair

  12. UNLV OFFICE OF INFORMATION TECHNOLOGY WIRELESS NETWORK (Wi-Fi) POLICY

    E-Print Network [OSTI]

    Hemmers, Oliver

    : Data and Information Security, Sections 2.1 and 3.3 http://system.nevada.edu/tasks/sites/Nshe/assets/File/BoardOfRegents/Procedures/P& GM%20CH14%20-%20DATA%20AND%20INFORMATION%20SECURITY.pdf CONTACTS Refer to the Office of InformationUNLV OFFICE OF INFORMATION TECHNOLOGY WIRELESS NETWORK (Wi-Fi) POLICY RESPONsmLE ADMINISTRATOR

  13. Oceanography Vol.21, No.4118 WiNter-SpriNg StormS aNd

    E-Print Network [OSTI]

    Oceanography Vol.21, No.4118 WiNter-SpriNg StormS aNd their iNflueNce oN SedimeNt reSuSpeNSioN, tra Oceanography Vol.21, No.4118 ThisarticlehasbeenpublishedinOceanography,Volume21,Number4,aquarterlyjournalof,rockville,md20849-1931,uSa. #12;Oceanography december 2008 119 aBStract. The Episodic Events-Great Lakes

  14. Category:Chicago, IL | 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 Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButte County,Camilla, Georgia: Energy014771°,NorthCLEAN Webinar JumpChicago, IL

  15. SSL Demonstration: Bridge Lighting, Minneapolis, MN

    SciTech Connect (OSTI)

    2014-10-01

    DOE Solid-State Lighting GATEWAY summary brief for Phase II report on the longer-term performance of LED lighting installed in 2008 on the I-35W Bridge in Minneapolis, MN.

  16. High Mn austenitic stainless steel

    DOE Patents [OSTI]

    Yamamoto, Yukinori (Oak Ridge, TN) [Oak Ridge, TN; Santella, Michael L (Knoxville, TN) [Knoxville, TN; Brady, Michael P (Oak Ridge, TN) [Oak Ridge, TN; Maziasz, Philip J (Oak Ridge, TN) [Oak Ridge, TN; Liu, Chain-tsuan (Knoxville, TN) [Knoxville, TN

    2010-07-13

    An austenitic stainless steel alloy includes, in weight percent: >4 to 15 Mn; 8 to 15 Ni; 14 to 16 Cr; 2.4 to 3 Al; 0.4 to 1 total of at least one of Nb and Ta; 0.05 to 0.2 C; 0.01 to 0.02 B; no more than 0.3 of combined Ti+V; up to 3 Mo; up to 3 Co; up to 1W; up to 3 Cu; up to 1 Si; up to 0.05 P; up to 1 total of at least one of Y, La, Ce, Hf, and Zr; less than 0.05 N; and base Fe, wherein the weight percent Fe is greater than the weight percent Ni, and wherein the alloy forms an external continuous scale including alumina, nanometer scale sized particles distributed throughout the microstructure, the particles including at least one of NbC and TaC, and a stable essentially single phase FCC austenitic matrix microstructure that is essentially delta-ferrite-free and essentially BCC-phase-free.

  17. , : roym@ee.technion.ac.il -OpenStack

    E-Print Network [OSTI]

    Cidon, Israel

    (OVS) . , , . OpenFlow. #12; OpenFlow and SDN Emulating Data-Centers by MiniNet : yanivbi@tx.technion.ac.il ( Data , . Topology Verification in OpenFlow datacenter networks : yanivbi@tx.technion.ac.il Datacenter. , mininet datacenter , " . -datacenter , Openflow. 2

  18. Curriculum di ZONCA FULVIO Stampato il 08-01-2010

    E-Print Network [OSTI]

    Zonca, Fulvio

    Curriculum di ZONCA FULVIO Stampato il 08-01-2010 Pagina 1 di 55 11-04-1988Data ass.: 1. SITUAZIONE): Esp. esterna riconosciuta (in anni): CURRICULUM DI: ZONCA FULVIO89250 10-01-1962 Matricola Cognome;Curriculum di ZONCA FULVIO Stampato il 08-01-2010 Pagina 2 di 55 5. ATTIVITA' PROFESSIONALI SCIENZE FISICHE

  19. Local environment of Mn in Mn delta-doped Si layers

    SciTech Connect (OSTI)

    Xiao, Q.F.; Kahwaji, S.; Monchesky, T.L.; Gordon, R.A.; Crozier, E.D.

    2009-11-09

    Dilute magnetic semiconductors combine both magnetic ordering and semiconducting behaviour, leading to potential spintronic applications. Silicon containing dilute Mn impurities is a potential dilute magnetic semiconductor. We have grown Mn delta-doped films by deposition of 0.7 of a monolayer of Mn on Si(001) by molecular beam epitaxy and capping the film with Si. The magnetic properties are likely sensitive to the distribution of Mn on substitutional or interstitial sites and the formation of metallic precipitates. We have used polarization-dependent XAFS to examine the local structure. We compare to a thicker MnSi film grown on Si(111) and also examine the influence of lead on the manganese environment when used as a surfactant in the growth process.

  20. Properties of (Ga,Mn)As codoped with Li

    SciTech Connect (OSTI)

    Miyakozawa, Shohei; Chen, Lin; Matsukura, Fumihiro; Ohno, Hideo

    2014-06-02

    We grow Li codoped (Ga,Mn)As layers with nominal Mn composition up to 0.15 by molecular beam epitaxy. The layers before and after annealing are characterized by x-ray diffraction, transport, magnetization, and ferromagnetic resonance measurements. The codoping with Li reduces the lattice constant and electrical resistivity of (Ga,Mn)As after annealing. We find that (Ga,Mn)As:Li takes similar Curie temperature to that of (Ga,Mn)As, but with pronounced magnetic moments and in-plane magnetic anisotropy, indicating that the Li codoping has nontrivial effects on the magnetic properties of (Ga,Mn)As.

  1. BANDO PER IL RECLUTAMENTO DI UN RICERCATORE CON RAPPORTO DI LAVORO A TEMPO DETERMINATO CO FINANZIATO DALLA REGIONE LAZIO PER IL SETTORE S/D

    E-Print Network [OSTI]

    Di Pillo, Gianni

    FINANZIATO DALLA REGIONE LAZIO PER IL SETTORE S/D BIO/09 PRESSO IL DIPARTIMENTO DI FISIOLOGIA E FARMACOLOGIA "VITTORIO ERSPAMER" Il Direttore del Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" Visto il Regione Lazio Viste le Delibere del Consiglio del Dipartimento di Fisiologia e Farmacologia "Vittorio

  2. Magnetic fields of HgMn stars

    E-Print Network [OSTI]

    Hubrig, S; Ilyin, I; Korhonen, H; Schoeller, M; Savanov, I; Arlt, R; Castelli, F; Curto, G Lo; Briquet, M; Dall, T H

    2012-01-01

    The frequent presence of weak magnetic fields on the surface of spotted late-B stars with HgMn peculiarity in binary systems has been controversial during the two last decades. We re-analyse available spectropolarimetric material by applying the moment technique on spectral lines of inhomogeneously distributed elements separately. Furthermore, we present new determinations of the mean longitudinal magnetic field for the HgMn star HD65949 and the hotter analog of HgMn stars, the PGa star HD19400, using FORS2 installed at the VLT. We also give new measurements of the eclipsing system AR Aur with a primary star of HgMn peculiarity which were obtained with the SOFIN spectropolarimeter installed at the Nordic Optical Telescope. We downloaded from the ESO archive the publically available HARPS spectra for eight HgMn stars and one normal and one superficially normal B-type star obtained in 2010. The application of the moment technique to the HARPS and SOFIN spectra allowed us to study the presence of the longitudina...

  3. IL-11 is a parietal cell cytokine that induces atrophic gastritis

    E-Print Network [OSTI]

    Howlett, Meegan

    Background and Aims IL-is important in gastric damage, mucosal repair and gastric cancer progression. We analysed IL-11 expression in H.pylori infected mouse stomach, the site of gastric IL-11 expression in mice and humans, ...

  4. Spin reorientation and Ce-Mn coupling in antiferromagnetic oxypnictide CeMnAsO

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

    Zhang, Qiang; Tian, Wei; Peterson, Spencer G.; Dennis, Kevin W.; Vaknin, David

    2015-02-18

    Structure and magnetic properties of high-quality polycrystlline CeMnAsO, a parent compound of the 1111-type oxypnictides, have been investigated using neutron powder diffraction and magnetization measurements. We find that CeMnAsO undergoes a C-type antiferromagnetic order with Mn2+(S = 5/2) moments pointing along the c axis below a relatively high Nel temperature of TN = 347(1) K. Below TSR = 35 K, two simultaneous transitions occur where the Mn moments reorient from the c axis to the ab plane preserving the C-type magnetic order, and Ce moments undergo long-range AFM ordering with antiparallel moments pointing in the ab plane. Another transition tomorea noncollinear magnetic structure occurs below 7 K. The ordered moments of Mn and Ce at 2 K are 3.32(4) ?B and 0.81(4)?B, respectively. We find that CeMnAsO primarily falls into the category of a local-moment antiferromagnetic insulator in which the nearest-neighbor interaction (J1) is dominant with J2 1/2 in the context of J1 J2 Jc model. The spin reorientation transition driven by the coupling between Ce and the transition metal seems to be common to Mn, Fe, and Cr ions, but not to Co and Ni ions in the isostructural oxypnictides. As a result, a schematic illustration of magnetic structures in Mn and Ce sublattices in CeMnAsO is presented.less

  5. Energy absorption in Ni-Mn-Ga/ polymer composites

    E-Print Network [OSTI]

    Feuchtwanger, Jorge

    2006-01-01

    In recent years Ni-Mn-Ga has attracted considerable attention as a new kind of actuator material. Off-stoichiometric single crystals of Ni2MnGa can regularly exhibit 6% strain in tetragonal martensites and orthorhombic ...

  6. DOE - Office of Legacy Management -- Chicago North IL Site - IL 05

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-SessionsSouth DakotaRobbins and Myers Co -VANaval ,, *'AliquippaOfficeNorth IL

  7. Intrathymic radioresistant stem cells follow an IL-2/IL-2R pathway during thymic regeneration after sublethal irradiation

    SciTech Connect (OSTI)

    Zuniga-Pfluecker, J.C.K.; Kruisbeek, A.M. )

    1990-05-15

    Sublethally irradiated mice undergo thymic regeneration which follows a phenotypic pattern of events similar to that observed during normal fetal development. Thymic regeneration after irradiation is the product of a limited pool of intrathymic radioresistant stem cells undergoing simultaneous differentiation. We show that in this model of T cell development, thymic regeneration follows a pathway in which the IL-2R is transiently expressed on CD4-/CD8- cells. IL-2R expression occurred during the exponential growth period of thymic regeneration, and IL-2R blocking prevented this explosive growth. Flow cytometry analysis revealed that the IL-2R blockade affected primarily the development of the immature CD3-/CD4-/CD8- (triple negative) cells and their ability to generate CD3+/CD4+/CD8+ or CD3+/CD4+/CD8- and CD3+/CD4-/CD8+ thymocytes. Thus, our findings demonstrate that blocking of the IL-2R resulted in an arrest in proliferation and differentiation by intrathymic radioresistant stem cells, indicating that the IL-2/IL-2R pathway is necessary for the expansion of immature triple negative T cells.

  8. Analysis and Comparison between War Driving and War Walk-ing in Metropolitan WiFi Radio Maps

    E-Print Network [OSTI]

    Chu, Hao-hua

    Analysis and Comparison between War Driving and War Walk- ing in Metropolitan WiFi Radio Maps Arvin, Hsinchu County, 310, Taiwan arvin@itri.org.tw ABSTRACT War-driving is currently the most widely adopted cost for war driv- ing is smaller than that of war walking, its positional accu- racy is also lower

  9. Theory of weak localization in ferromagnetic (Ga,Mn)As

    E-Print Network [OSTI]

    Garate, Ion; Sinova, Jairo; Jungwirth, T.; MacDonald, A. H.

    2009-01-01

    We study quantum interference corrections to the conductivity in (Ga,Mn)As ferromagnetic semiconductors using a model with disordered valence-band holes coupled to localized Mn moments through a p-d kinetic-exchange interaction. We find that at Mn...

  10. Formation of MnSb during the growth of MnSi layers in the presence of an Sb flux

    E-Print Network [OSTI]

    Pennycook, Steve

    Epitaxial growth of silicide layers on Si substrates has attracted much attention due to their technologicalFormation of MnSb during the growth of MnSi layers in the presence of an Sb flux K. Matsuda, Y have been performed to elucidate the growth mechanism. The MnSi layer was grown by reactive deposition

  11. Influence of interstitial Mn on magnetism in room-temperature ferromagnet Mn(1+delta)Sb

    SciTech Connect (OSTI)

    Taylor, Alice E [ORNL; Berlijn, Tom [ORNL; Hahn, Steven E [ORNL; May, Andrew F [ORNL; Williams, Travis J [ORNL; Poudel, Lekhanath N [ORNL; Calder, Stuart A [ORNL; Fishman, Randy Scott [ORNL; Stone, Matthew B [ORNL; Aczel, Adam A [ORNL; Cao, Huibo [ORNL; Lumsden, Mark D [ORNL; Christianson, Andrew D [ORNL

    2015-01-01

    We report elastic and inelastic neutron scattering measurements of the high-TC ferromagnet Mn(1+delta)Sb. Measurements were performed on a large, TC = 434 K, single crystal with interstitial Mn content of delta=0.13. The neutron diffraction results reveal that the interstitial Mn has a magnetic moment, and that it is aligned antiparallel to the main Mn moment. We perform density functional theory calculations including the interstitial Mn, and find the interstitial to be magnetic in agreement with the diffraction data. The inelastic neutron scattering measurements reveal two features in the magnetic dynamics: i) a spin-wave-like dispersion emanating from ferromagnetic Bragg positions (H K 2n), and ii) a broad, non-dispersive signal centered at forbidden Bragg positions (H K 2n+1). The inelastic spectrum cannot be modeled by simple linear spin-wave theory calculations, and appears to be significantly altered by the presence of the interstitial Mn ions. The results show that the influence of the int

  12. CaMn2Al10: Itinerant Mn magnetism on the verge of magnetic order

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

    Steinke, L.; Simonson, J. W.; Yin, W. -G.; Smith, G. J.; Kistner-Morris, J. J.; Zellman, S.; Puri, A.; Aronson, M. C.

    2015-07-24

    We report the discovery of CaMn2Al10, a metal with strong magnetic anisotropy and moderate electronic correlations. Magnetization measurements find a Curie-Weiss moment of 0.83?B/Mn, significantly reduced from the Hund's rule value, and the magnetic entropy obtained from specific heat measurements is correspondingly small, only ? 9% of Rln2. These results imply that the Mn magnetism is highly itinerant, a conclusion supported by density functional theory calculations that find strong Mn-Al hybridization. Consistent with the layered nature of the crystal structure, the magnetic susceptibility ? is anisotropic below 20 K, with a maximum ratio of ?[010]/?[001] ? 3.5. A strong power-lawmoredivergence ?(T) ~ T1.2 below 20 K implies incipient ferromagnetic order, an Arrott plot analysis of the magnetization suggests a vanishing low Curie temperature TC ~ 0. Our experiments indicate that CaMn2Al10 is a rare example of a system where the weak and itinerant Mn-based magnetism is poised on the verge of order.less

  13. Interleukin-2 (IL-2) dependent expression of biologically relevant IL-2 receptors: uncoupling of anti-T3 induced receptor expression with cyclosporin

    SciTech Connect (OSTI)

    Gitter, A.B.D.; Labus, J.M.; Butler, L.D.

    1986-03-01

    Human peripheral blood T cell expression of IL-2 receptors (IL-2R), detected by both immunocytofluorometry and /sup 125/I-IL-2 binding, was studied using lymphocytes stimulated with monoclonal anti-T3 antibodies (Leu-4, OKT3). Lymphocytes, isolated from healthy individuals, were prescreened and classified as Leu-4 responders or non-responders according to 72 h /sup 3/H-thymidine incorporation experiments. Leu-4 non-responder lymphocytes, though capable of normal IL-2R expression and IL-2 secretion when cultured with OKT3 (IgG2a), expressed little to no IL-2R nor secreted IL-2 when stimulated with Leu-4 (IgG1). In addition, the amount of IL-2 secreted by Leu-4 stimulated, Leu-4 responder cells, was one-third- to one-fifth of that detected when OKT3 was used as the stimulant. The addition of recombinant IL-2 (rIL-2) to a Leu-4 stimulated, Leu-4 non-responder lymphocyte culture, resulted in the expression of IL-2R and cellular proliferation, indicating that IL-2 upregulated its biologically relevant receptor. As expected, cyclosporin-A (CSA) inhibited the secretion of IL-2 and subsequent proliferation of Leu-4 stimulated, Leu-4 responder cells. Unexpectedly, however, the expression of IL-2R was also blocked. Exogenous rIL-2 partially reversed the effect of CSA on IL-2R expression and proliferation. The results indicate that IL-2 may provide an additional, required signal for optimal IL-2R expression.

  14. untitled

    Annual Energy Outlook [U.S. Energy Information Administration (EIA)]

    September 2005 East Coast Appalachian No. 1 Total IN, IL, KY MN, WI, ND, SD OK, KS, MO Total Liquefied Refinery Gases 0.7 0.3 0.7 2.9 1.3 0.5 2.2 Finished Motor Gasoline a 47.9...

  15. Entertainment Technology Center, CMU Internship Survey Results, Dec 2014 and May 2015

    E-Print Network [OSTI]

    Interviews Arranged by Career Services 12 Intern Search/Company Websites 9 Alumni Contacts 6 West Coast Trip, MS, NC, PR, SC, TN 2 / 4% Midwest: IA, IL, IN, KS, MI, MN, MO, ND, NE, OH, SD, WI 2 / 4% Northwest

  16. Regional Report Issue Paper

    E-Print Network [OSTI]

    Garfunkel, Eric

    South Atlantic Delaware, Florida, Georgia, Maryland, North Carolina, South Carolina, Virginia, West Virginia [The District of Columbia is part of this division but is not included in the analysis Nebraska SD South Dakota KS Kansas MN Minnesota IA Iowa MO Missouri WI Wisconsin IL Illinois IN Indiana OH

  17. In questo libretto sono illustrati i quesiti proposti nella seconda edizione del Kangourou dell'Informatica, fase eliminatoria, che si e svolta il 10 marzo 2010. Il software con il quale i quesiti sono stati presentati ai concorrenti

    E-Print Network [OSTI]

    Monga, Mattia

    Kangourou dell'Informatica, fase eliminatoria, che si e svolta il 10 marzo 2010. Il software con il quale i'ambito dell'informatica; vengono anche individuate delle parole chiave che possono essere utili per ricerche promuovere l'informatica come disciplina scienti#12;ca. Violetta Lonati Mattia Monga Anna Morpurgo Lorenzo

  18. La logica e il pensiero visivo 1. Le due funzioni del pensiero visivo

    E-Print Network [OSTI]

    Floridi, Luciano

    retoriche classiche: gi nella Institutio Oratoria (XI, iii, 102) Quintiliano attribuiva il computo digitale

  19. Informatica per il Management: Analisi 28/09/2010 Docente: Carla Guerrini 1

    E-Print Network [OSTI]

    Guerrini, Carla

    Informatica per il Management: Analisi Numerica 1 28/09/2010 Docente: Carla Guerrini 1 Informatica per il Management:Informatica per il Management: Analisi NumericaAnalisi Numerica Anno Accademico 2010 possibile e con la massima accuratezza #12;Informatica per il Management: Analisi Numerica 2 28

  20. Il mondo visto da sud e La prima volta. Una conversazione con Franco Cassano

    E-Print Network [OSTI]

    Lollini, Massimo

    2013-01-01

    il pensiero negativo. In Albert Camus: Mediterraneo ela rivisitazione di Albert Camus, intellettuale algerino

  1. SiFi: Exploiting VoIP Silence for WiFi Energy Savings in Smart Phones

    E-Print Network [OSTI]

    Zhou, Gang

    ), to its sleep or Power Save Mode (PSM), which consumes little power (36mW). Applications like VoIP do not perform well under PSM mode however, due to their real-time nature, so the energy footprint is quite high WiFi to the Power Save Mode (PSM) which consumes 20 fold less energy (36mW in Sprint HTC Hero

  2. www.weizmann.ac.il/library Introduction 3

    E-Print Network [OSTI]

    to the Library's printed and digital collections, including books, journals, theses, serials, and online lectures Weizmann Institute of Science Libraries 5 Digital Access Arranging access to newly purchased electronic#12;www.weizmann.ac.il/library 2 Contents Introduction 3 The Library's Website 3 The Library

  3. IlIill Ills i.iiiii lilt

    E-Print Network [OSTI]

    Handy, Todd C.

    . .:.. F I, IlIill Ills i.iiiii lilt ``a ``I [. TOWN .,. .., . THE JOURNAL I 0 F TH E j " ; PLANNJNG INS3DFDUTE : 4, cE - . : .,., ? DECEMBER 1926 / VOLV ?40 "/1 I'. CONTENT I TOWN PLANNING THE BRITISH COLUMBIA UNIVERSITY LANDS A GREAT TOWN PLANNING SCHEME FOR WESTERN CANADA; BRITIH HOUSIN

  4. Experimental and first-principles study of ferromagnetism in Mn-doped zinc stannate nanowires

    SciTech Connect (OSTI)

    Deng Rui; Zhou Hang; Qin Jieming; Wan Yuchun; Jiang Dayong; Liang Qingcheng [School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022 (China); Li Yongfeng [Key Laboratory of Physics and Technology for Advanced Batteries, College of Physics, Jilin University, Changchun 130012 (China); Wu, Tom [Physical Sciences and Engineering Division, Solar and Photovoltaics Engineering Research Center, King Abdullah University of Science and Technology, Thuwal 23955-6900 (Saudi Arabia); Yao Bin [State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012 (China); Liu Lei [State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, No.3888 Dongnanhu Road, Changchun 130033 (China)

    2013-07-21

    Room temperature ferromagnetism was observed in Mn-doped zinc stannate (ZTO:Mn) nanowires, which were prepared by chemical vapor transport. Structural and magnetic properties and Mn chemical states of ZTO:Mn nanowires were investigated by X-ray diffraction, superconducting quantum interference device (SQUID) magnetometry and X-ray photoelectron spectroscopy. Manganese predominantly existed as Mn{sup 2+} and substituted for Zn (Mn{sub Zn}) in ZTO:Mn. This conclusion was supported by first-principles calculations. Mn{sub Zn} in ZTO:Mn had a lower formation energy than that of Mn substituted for Sn (Mn{sub Sn}). The nearest neighbor Mn{sub Zn} in ZTO stabilized ferromagnetic coupling. This observation supported the experimental results.

  5. Alignment of micro-crystals of Mn12-acetate and direct observation of single molecules thereof

    E-Print Network [OSTI]

    Seo, Dongmin

    2009-05-15

    This dissertation focuses on three separate studies. First, magnetization of the Mn12- acetate was studied by low temperature hysteresis loops and DC magnetization data on magnetically aligned Mn12-acetate micro-crystals. Secondly, Mn12-acetate thin...

  6. Electron tunneling studies of Mn12-Acetate

    E-Print Network [OSTI]

    Ma, Lianxi

    2008-10-10

    laser deposition (PLD) was used to deposit two monolayers of Mn 12 -Acetate on thin Pt wires (diame- ter 0.001 in). The electron tunneling current was measured with typical bias voltages from -1 to 1 V at liquid helium temperature, 4.2 K. I, dI/dV, and d... 2 I/dV 2 signals were directly acquired with the aid of a current amplifier and two lock-in-amplifiers. Results show that the differential conductance is approximately 10 ?6 S for bias volt- ages 0.04 V ?|V |? 1 V and exhibits a strong voltage...

  7. Spin caloritronics in graphene with Mn

    SciTech Connect (OSTI)

    Torres, Alberto Lima, Matheus P. Fazzio, A.; Silva, Antnio J. R. da

    2014-02-17

    We show that graphene with Mn adatoms trapped at single vacancies features spin-dependent Seebeck effect, thus enabling the use of this material for spin caloritronics. A gate potential can be used to tune its thermoelectric properties in a way it presents either a total spin polarized current, flowing in one given direction, or currents for both spins flowing in opposite directions without net charge transport. Moreover, we show that the thermal magnetoresistance can be tuned between ?100% and +100% by varying a gate potential.

  8. IL DIRETTORE VISTO l'art. 6 del Regolamento per il reclutamento di Ricercatori con contratto di lavoro a tempo

    E-Print Network [OSTI]

    Di Pillo, Gianni

    .02.2010; VISTA la Convenzione stipulata tra il Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" e la Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" nella seduta del 15.01.2010; VISTA la Delibera Fisiologia e Farmacologia "Vittorio Erspamer" del 19 aprile 2010 nella quale stata approvata la nomina

  9. CORSI DI LAUREA IN INGEGNERIA PER L'AMBIENTE E IL TERRITORIO ED INGEGNERIA CIVILE

    E-Print Network [OSTI]

    Pasquero, Stefano

    CORSI DI LAUREA IN INGEGNERIA PER L'AMBIENTE E IL TERRITORIO ED INGEGNERIA CIVILE Corso di circonferenza. 7) Determinare energia cinetica e energia potenziale di P. L'energia si conserva? Confrontare il

  10. Tassocenosi a Ditteri Chironomidi in fiumi mediterranei (Cilento, Sud Italia): ecologia e implicazioni per il biomonitoraggio

    E-Print Network [OSTI]

    Armanini, David G

    con i parametri abiotici rilevati. Il primo asse rappresenta un gradiente di qualit ed correlato tassocenosi di riffle e di pool sono risultate significativamente diverse. Il secondo asse rappresenta un

  11. Magnetic Moment Enhancement for Mn7 Cluster on Graphene

    SciTech Connect (OSTI)

    Liu, Xiaojie [Ames Laboratory; Wang, Cai-Zhuang [Ames Laboratory; Lin, Hai-Qing [Beijing Computational Science Research Center; Ho, Kai-Ming [Ames Laboratory

    2014-08-21

    Mn7 cluster on graphene with different structural motifs and magnetic orders are investigated systematically by first-principles calculations. The calculations show that Mn7 on graphene prefers a two-layer motif and exhibits a ferrimagnetic coupling. The magnetic moment of the Mn7 cluster increases from 5.0 ?B at its free-standing state to about 6.0 ?B upon adsorption on graphene. Mn7 cluster also induces about 0.3 ?B of magnetic moment in the graphene layer, leading to an overall enhancement of 1.3 ?B magnetic moment for Mn7 on graphene. Detail electron transfer and bonding analysis have been carried out to investigate the origin of the magnetic enhancement.

  12. Prot. n. 1063/2014 SELEZIONE PER IL CONFERIMENTO DI N. 1 BORSA DI STUDIO

    E-Print Network [OSTI]

    interesse per gli studi di risposta sismica locale. Il candidato risponde con competenza riguardo a teoria e

  13. IL-3 and Oncogenic Abl Regulate the Myeloblast Transcriptome by Alt= Stability

    E-Print Network [OSTI]

    Ernst, Jason

    The growth factor interleukin-3 (IL-3) promotes the survival and growth of multipotent hematopoietic progenitors and

  14. AROF Disposizione n. 4343 del 29.10.2014 IL DIRETTORE DELL'AREA

    E-Print Network [OSTI]

    Di Pillo, Gianni

    presso il Servizio POP'S a partire dal 01.11.2014; #12;DISPONE Art. 1 - Sono approvati gli atti relativi occasionale da attivare presso il Servizio POP'S; Art. 2 ­ Viene approvata la seguente graduatoria di meritoAROF Disposizione n. 4343 del 29.10.2014 IL DIRETTORE DELL'AREA VISTO l'art. 7, comma 6 del D

  15. Start S Morgan St End 1933 W Polk St, Chicago, IL 60612

    E-Print Network [OSTI]

    Spirtes, Peter

    Start S Morgan St End 1933 W Polk St, Chicago, IL 60612 When 10/5/11 after 7:00pm Duration 11 mins total Loading... 2011 Google - Map data 2011 Google, Sanborn - S Morgan St to 1933 W Polk St, Chicago stops) Polk & Wolcott Walk to 1933 W Polk St, Chicago, IL 60612 About 1 min 1933 W Polk St, Chicago, IL

  16. Magnetic coupling in neutral and charged Cr{sub 2}, Mn{sub 2}, and CrMn dimers

    SciTech Connect (OSTI)

    Desmarais, N. [Institut de Physique Experimentale, Ecole Polytechnique Federale de Lausanne, PHB-Ecublens, CH-1015 Lausanne, (Switzerland)] [Institut de Physique Experimentale, Ecole Polytechnique Federale de Lausanne, PHB-Ecublens, CH-1015 Lausanne, (Switzerland); Reuse, F. A. [Institut de Physique Experimentale, Ecole Polytechnique Federale de Lausanne, PHB-Ecublens, CH-1015 Lausanne, (Switzerland)] [Institut de Physique Experimentale, Ecole Polytechnique Federale de Lausanne, PHB-Ecublens, CH-1015 Lausanne, (Switzerland); Khanna, S. N. [Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284-2000 (United States)] [Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284-2000 (United States)

    2000-04-01

    Theoretical ab initio studies of neutral, cationic and anionic Cr{sub 2}, Mn{sub 2}, and CrMn dimers have been carried out to explore the progression of magnetic coupling with the number of electrons. It is shown that while Cr{sub 2} and Cr{sub 2}{sup -} have antiferromagnetically coupled atomic spins, Cr{sub 2}{sup +} has a ferromagnetic ground state closely followed by an antiferromagnetic state. On the other hand, all Mn{sub 2} dimers are ferromagnetic, irrespective of the charge. The neutral CrMn is ferrimagnetic while the charged CrMn are antiferromagnetic. In all cases, the charged dimers are found to be more stable than the neutral ones. The results are compared with available calculations and experiments and the difficulties associated with theoretical description and the experimental interpretations are discussed. (c) 2000 American Institute of Physics.

  17. Distinct local electronic structure and magnetism for Mn in amorphous Si and Ge

    E-Print Network [OSTI]

    Zeng, Li

    2010-01-01

    Mn-Si (red squares) and Mn-Ge distances (blue circles) d asof the number of Si or Ge nearest neighbours N c ; (c) localthree Mn atoms with different N c in a-Mn 0.094 Ge 0.906 .

  18. Study of the beta delayed particle emission from 48Mn and its relevance for explosive nucleosynthesis

    E-Print Network [OSTI]

    Martel, I

    2015-01-01

    Study of the beta delayed particle emission from 48Mn and its relevance for explosive nucleosynthesis

  19. Inverse spin Hall effect in Pt/(Ga,Mn)As

    SciTech Connect (OSTI)

    Nakayama, H.; Chen, L.; Chang, H. W.; Ohno, H.; Matsukura, F.

    2015-06-01

    We investigate dc voltages under ferromagnetic resonance in a Pt/(Ga,Mn)As bilayer structure. A part of the observed dc voltage is shown to originate from the inverse spin Hall effect. The sign of the inverse spin Hall voltage is the same as that in Py/Pt bilayer structure, even though the stacking order of ferromagnetic and nonmagnetic layers is opposite to each other. The spin mixing conductance at the Pt/(Ga,Mn)As interface is determined to be of the order of 10{sup 19?}m{sup ?2}, which is about ten times greater than that of (Ga,Mn)As/p-GaAs.

  20. Electronic interactions between gold films and mn12-acetate

    E-Print Network [OSTI]

    Means, Joel Lewis

    2009-05-15

    Interactions between Mn12acetate molecular magnets and thin gold films have been explored in light of the theory of weak localization. Low-temperature measurements of the magnetoresistance of gold films of varying thicknesses, with and without...

  1. DOE - Office of Legacy Management -- Madison - IL 26

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-SessionsSouth DakotaRobbins and Myers CoMadison - IL 26 FUSRAP Considered Sites

  2. DOE - Office of Legacy Management -- Vapofier Corp - IL 25

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-SessionsSouth DakotaRobbins and Myers Co -VA 03 VirginiaVapofier Corp - IL

  3. Ambi-site substitution of Mn in lanthanum germanate apatites

    SciTech Connect (OSTI)

    Kendrick, E. [Chemical Sciences, University of Surrey, Guildford, Surrey GU2 7XH (United Kingdom); Knight, K.S. [ISIS Facility, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX (United Kingdom); Slater, P.R., E-mail: p.r.slater@bham.ac.uk [School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom)

    2009-08-05

    A neutron diffraction study at 4 K of the Mn doped lanthanum germanate apatite-type oxide ion conductor of nominal starting composition 'La{sub 9.5}Mn{sub 0.5}(GeO{sub 4}){sub 6}O{sub 2.75}' is reported. The structure was refined in space group P6{sub 3}/m, although high thermal displacement parameters were observed for the oxide ion sites (particularly O3, and O4). Reduced thermal displacement parameters were obtained by splitting the O3 site, and allowing the O4 oxygen to move off site, which may indicate local regions of lower symmetry within the structure. In addition, the data suggested ambi-site substitution of Mn, with it being present on both the Ge site and the La site. Assuming no change in La:Mn:Ge ratio, a composition of La{sub 9.18}Mn{sub 0.28}(GeO{sub 4}){sub 5.8}(MnO{sub 4}){sub 0.2}O{sub 2} was determined. As such there are nominally no interstitial oxide ions, but rather cation vacancies on the La site. Therefore, the high conductivity for this sample is most likely related to the introduction of Frenkel-type defects at higher temperature, as previously proposed for other apatite-type systems containing vacancies on the La site.

  4. Paper submitted to the Winter ASME Meeting, Nov. 27-Dec. 2, 1988, Chicago, IL. CONF-881120 --1 2

    E-Print Network [OSTI]

    Harilal, S. S.

    Power Program Argonne National Laboratory 9700 S. Caes Ave., Argonne, IL 60439 USA ABSTRACT Very high

  5. BANDO DI SELEZIONE PER IL CONFERIMENTO DI ASSEGNI PER LO SVOLGIMENTO DI ATTIVIT DI RICERCA DI CATEGORIA B TIPOLOGIA II

    E-Print Network [OSTI]

    Di Pillo, Gianni

    cerebrale, psicopatologia e risposta ai trattamenti", presso il Dipartimento di Scienze e Biotecnologie

  6. 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)

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

    2009-06-03

    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.

  7. Presented at the 16th ANS Topical Meeting on the Technology of Fusion Energy, Madison WI, Sept. 14-16, 2004.

    E-Print Network [OSTI]

    Ghoniem, Nasr M.

    Presented at the 16th ANS Topical Meeting on the Technology of Fusion Energy, Madison WI, Sept. 14 in manufacturing of cellular materials have resulted in ceramics with highly uniform interconnected porosities thermo-mechanical properties, such as excellent thermal shock resistance and high surface to volume

  8. 2107 Mechanical Engineering 1513 University Avenue Madison, WI 53706 Phone: (608) 263-1445 Fax: (608) 265-5290 Email: wiseli@engr.wisc.edu Website

    E-Print Network [OSTI]

    Sheridan, Jennifer

    2107 Mechanical Engineering 1513 University Avenue Madison, WI 53706 Phone: (608) 263 and Guidelines for Using Trademarks and Copyrighted Material WISELI: Women in Science and Engineering Leadership and Engineering Leadership Institute is firmly committed to broadly disseminating our materials and workshops

  9. Supplemental Information for "Regional to global assessments of phytoplankton dynamics from the SeaWiFS mission" by D.A. Siegel and others.

    E-Print Network [OSTI]

    Siegel, David A.

    . This water-leaving radiance, Lw(), is solar radiation that penetrated the ocean surface, interacted the SeaWiFS mission" by D.A. Siegel and others. Satellite Ocean Color Data Processing: Ocean color sensors are designed to measure the spectral distribution of visible radiation upwelling from beneath the ocean surface

  10. Disordered electronic and magnetic systems - transition metal (Mn) and rare earth (Gd) doped amorphous group IV semiconductors (C, Si, Ge)

    E-Print Network [OSTI]

    Zeng, Li

    2007-01-01

    Magnetization data for a-Mn 0.15 Ge 0.85 ?lms mea- suredSi 1?x and a-Mn x Ge 1?x samples. . . . . . . . . . . . . .both a-Mn x Si 1?x and a-Mn x Ge 1?x as a func- tion of Mn

  11. Protein kinase CK2 modulates IL-6 expression in inflammatory breast cancer

    SciTech Connect (OSTI)

    Drygin, Denis, E-mail: ddrygin@cylenepharma.com; Ho, Caroline B.; Omori, Mayuko; Bliesath, Joshua; Proffitt, Chris; Rice, Rachel; Siddiqui-Jain, Adam; O'Brien, Sean; Padgett, Claire; Lim, John K.C.; Anderes, Kenna; Rice, William G.; Ryckman, David

    2011-11-11

    Highlights: Black-Right-Pointing-Pointer We examine the potential cross-talk between CK2 and IL-6. Black-Right-Pointing-Pointer Inhibition of CK2 by siRNA or CX-4945 inhibits expression of IL-6 in models of IBC. Black-Right-Pointing-Pointer Treatment of IBC patient in the clinic with CX-4945 reduces her IL-6 plasma levels. Black-Right-Pointing-Pointer We demonstrate that CK2 is a potential therapeutic target for IL-6 driven diseases. -- Abstract: Inflammatory breast cancer is driven by pro-angiogenic and pro-inflammatory cytokines. One of them Interleukin-6 (IL-6) is implicated in cancer cell proliferation and survival, and promotes angiogenesis, inflammation and metastasis. While IL-6 has been shown to be upregulated by several oncogenes, the mechanism behind this phenomenon is not well characterized. Here we demonstrate that the pleotropic Serine/Threonine kinase CK2 is implicated in the regulation of IL-6 expression in a model of inflammatory breast cancer. We used siRNAs targeted toward CK2 and a selective small molecule inhibitor of CK2, CX-4945, to inhibit the expression and thus suppress the secretion of IL-6 in in vitro as well as in vivo models. Moreover, we report that in a clinical trial, CX-4945 was able to dramatically reduce IL-6 levels in plasma of an inflammatory breast cancer patient. Our data shed a new light on the regulation of IL-6 expression and position CX-4945 and potentially other inhibitors of CK2, for the treatment of IL-6-driven cancers and possibly other diseases where IL-6 is instrumental, including rheumatoid arthritis.

  12. Association study of schizophrenia and IL-2 receptor {beta} chain gene

    SciTech Connect (OSTI)

    Nimgaonkar, V.L.; Yang, Z.W.; Zhang, X.R.; Brar, J.S.

    1995-10-09

    A case-control association study was conducted in Caucasian patients with schizophrenia (DSM-III-R, n = 42) and unaffected controls (n = 47) matched for ethnicity and area of residence. Serum interleukin-2 receptor (IL-2R) concentrations, as well as a dinucleotide repeat polymorphism in the IL-2RP chain gene, were examined in both groups. No significant differences in IL-2R concentrations or in the distribution of the polymorphism were noted. This study does not support an association between schizophrenia and the IL-2RP gene locus, contrary to the suggestive evidence from linkage analysis in multicase families. 17 refs., 2 tabs.

  13. Segregation of Mn2+ Dopants as Interstitials in SrTiO3 Grain Boundaries

    SciTech Connect (OSTI)

    Yang, Hao; Kotula, Paul G.; Sato, Yukio; Chi, Miaofang; Ikuhara, Yuichi; Browning, Nigel D.

    2013-10-03

    Mn doped SrTiO3 shows promising magnetic and electrical properties, but the doping mechanism remains unclear. In this research Mn4+ is found to substitute Ti in bulk SrTiO3, but Mn2+ segregates inside grain boundaries at both Sr and interstitial sites. Mn interstitial doping has never been reported, but is found possible with the formation of Sr vacancies. This finding is significantly different from the amphoteric doping of Mn2+ substituting Sr and Mn4+ substituting Ti sites, therefore leads to different understanding on the defect mediated electrical and magnetic properties of transition metal doped perovskites.

  14. Functional MnMg{sub k} cation complexes in GaN featured by Raman spectroscopy

    SciTech Connect (OSTI)

    Devillers, T. Bonanni, A.; Leite, D. M. G.; Department of Physics, So Paulo State University, BauruSP ; Dias da Silva, J. H.

    2013-11-18

    The evolution of the optical branch in the Raman spectra of (Ga,Mn)N:Mg epitaxial layers as a function of the Mn and Mg concentrations, reveals the interplay between the two dopants. We demonstrate that the various Mn-Mg-induced vibrational modes can be understood in the picture of functional MnMg{sub k} complexes formed when substitutional Mn cations are bound to k substitutional Mg through nitrogen atoms, the number of ligands k being driven by the ratio between the Mg and the Mn concentrations.

  15. Spectroscopic variability and magnetic fields of HgMn stars

    E-Print Network [OSTI]

    Hubrig, S; Ilyin, I; Korhonen, H; Savanov, I S; Dall, T; Schoeller, M; Cowley, C R; Briquet, M; Arlt, R

    2011-01-01

    The discovery of exotic abundances, chemical inhomogeneities, and weak magnetic fields on the surface of late B-type primaries in spectroscopic binaries has important implications not only for our understanding of the formation mechanisms of stars with Hg and Mn peculiarities themselves, but also for the general understanding of B-type star formation in binary systems. The origin of the abundance anomalies observed in late B-type stars with HgMn peculiarity is still poorly understood. The connection between HgMn peculiarity and membership in binary and multiple systems is supported by our observations during the last decade. The important result achieved in our studies of a large sample of HgMn stars is the finding that most HgMn stars exhibit spectral variability of various chemical elements, proving that the presence of an inhomogeneous distribution on the surface of these stars is a rather common characteristic and not a rare phenomenon. Further, in the studied systems, we found that all components are che...

  16. The blue supergiant MN18 and its bipolar circumstellar nebula

    E-Print Network [OSTI]

    Gvaramadze, V V; Bestenlehner, J M; Bodensteiner, J; Langer, N; Greiner, J; Grebel, E K; Berdnikov, L N; Beletsky, Y

    2015-01-01

    We report the results of spectrophotometric observations of the massive star MN18 revealed via discovery of a bipolar nebula around it with the Spitzer Space Telescope. Using the optical spectrum obtained with the Southern African Large Telescope, we classify this star as B1 Ia. The evolved status of MN18 is supported by the detection of nitrogen overabundance in the nebula, which implies that it is composed of processed material ejected by the star. We analysed the spectrum of MN18 by using the code CMFGEN, obtaining a stellar effective temperature of \\approx 21 kK. The star is highly reddened, E(B-V)\\approx 2 mag. Adopting an absolute visual magnitude of M_V=-6.8\\pm0.5 (typical of B1 supergiants), MN18 has a luminosity of log L/Lsun \\approx 5.42\\pm0.30, a mass-loss rate of \\approx (2.8-4.5)\\times10^{-7} Msun/yr, and resides at a distance of \\approx 5.6^{+1.5} _{-1.2} kpc. We discuss the origin of the nebula around MN18 and compare it with similar nebulae produced by other blue supergiants in the Galaxy (She...

  17. Synthesis, characterization and electrochemical performance of Al-substituted Li?MnO?

    SciTech Connect (OSTI)

    Dhital, Chetan [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Huq, Ashfia [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Paranthaman, Mariappan Parans [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Manivannan, Ayyakkannu [National Energy Technology Lab. (NETL), Morgantown, WV (United States); West Virginia Univ., Morgantown, WV (United States); Torres-Castro, Loraine [Univ. of Puerto Rico, San Juan (Puerto Rico); Shojan, Jifi [Univ. of Puerto Rico, San Juan (Puerto Rico); Julien, Christian M. [Univ. Pierre et Marie Curie, Paris (France); Katiyar, Ram S. [Univ. of Puerto Rico, San Juan (Puerto Rico)

    2015-01-01

    Li?MnO? is known to be electrochemically inactive due to Mn in tetravalent oxidation state. Several compositions such as Li?MnO?, Li1.5Al0.17MnO?, Li1.0Al0.33MnO? and Li0.5Al0.5MnO? were synthesized by a sol-gel Pechini method. All the samples were characterized with XRD, Raman, XPS, SEM, Tap density and BET analyzer. XRD patterns indicated the presence of monoclinic phase for pristine Li?MnO? and mixed monoclinic/spinel phases (Li2-xMn1-yAlx+yO3+z) for Al-substituted Li?MnO? compounds. The Al substitution seems to occur both at Li and Mn sites, which could explain the presence of spinel phase. XPS analysis for Mn 2p orbital reveal a significant decrease in binding energy for Li1.0Al0.33MnO? and Li0.5Al0.5MnO? compounds. Cyclic voltammetry, charge/discharge cycles and electrochemical impedance spectroscopy were also performed. A discharge capacity of 24 mAh g? for Li?MnO?, 68mAh g? for Li1.5Al0.17MnO?, 58 mAh g? for Li1.0Al0.33MnO? and 74 mAh g? for Li0.5Al0.5MnO? were obtained. Aluminum substitutions increased the discharge capacity and the spinel phase.

  18. Synthesis, characterization and electrochemical performance of Al-substituted Li?MnO?

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

    Dhital, Chetan; Huq, Ashfia; Paranthaman, Mariappan Parans; Manivannan, Ayyakkannu; Torres-Castro, Loraine; Shojan, Jifi; Julien, Christian M.; Katiyar, Ram S.

    2015-08-08

    Li2MnO3 is known to be electrochemically inactive due to Mn in tetravalent oxidation state. Several compositions such as Li2MnO3 , Li1.5Al0.17MnO3, Li1.0Al0.33MnO3 and Li0.5Al0.5MnO3 were synthesized by a solgel Pechini method. All the samples were characterized with x-ray diffraction, Raman, x-ray photoelectron spectroscopy, scanning electron microscopy, Tap density and BET analyzer. X-ray diffraction patterns indicated the presence of monoclinic phase for pristine Li2MnO3and mixed monoclinic/spinel phases (Li2 - xMn1 - yAlx + yO3 + z) for Al-substituted Li2MnO3compounds. The Al substitution seems to occur both at Li and Mn sites, which could explain the presence of spinel phase. X-ray photoelectronmorespectroscopy for Mn 2p orbital reveals a significant decrease in binding energy for Li1.0Al0.33MnO3 and Li0.5Al0.5MnO3 compounds. Cyclic voltammetry, charge/discharge cycles and electrochemical impedance spectroscopy were also performed. A discharge capacity of 24 mAh g-1 for Li2MnO3, 68 mAh g-1 for Li1.5Al0.17MnO3, 58 mAh g-1 for Li1.0Al0.33MnO3 and 74 mAh g-1 for Li0.5Al0.5MnO3 were obtained. Aluminum substitutions increased the formation of spinel phase which is responsible for cycling.less

  19. Mn-Fe base and Mn-Cr-Fe base austenitic alloys

    DOE Patents [OSTI]

    Brager, Howard R. (Richland, WA); Garner, Francis A. (Richland, WA)

    1987-01-01

    Manganese-iron base and manganese-chromium-iron base austenitic alloys designed to have resistance to neutron irradiation induced swelling and low activation have the following compositions (in weight percent): 20 to 40 Mn; up to about 15 Cr; about 0.4 to about 3.0 Si; an austenite stabilizing element selected from C and N, alone or in combination with each other, and in an amount effective to substantially stabilize the austenite phase, but less than about 0.7 C, and less than about 0.3 N; up to about 2.5 V; up to about 0.1 P; up to about 0.01 B; up to about 3.0 Al; up to about 0.5 Ni; up to about 2.0 W; up to about 1.0 Ti; up to about 1.0 Ta; and with the remainder of the alloy being essentially iron.

  20. Resonant spin tunneling in randomly oriented nanospheres of Mn?? acetate

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

    Lendinez, S.; Billinge, S. J. L.; Zarzuela, R.; Tejada, J.; Terban, M. W.; Espin, J.; Imaz, I.; Maspoch, D.; Chudnovsky, E. M.

    2015-01-06

    We report measurements and theoretical analysis of resonant spin tunneling in randomly oriented nanospheres of a molecular magnet. Amorphous nanospheres of Mn?? acetate have been fabricated and characterized by chemical, infrared, TEM, X-ray, and magnetic methods. Magnetic measurements have revealed sharp tunneling peaks in the field derivative of the magnetization that occur at the typical resonant field values for the Mn?? acetate crystal in the field parallel to the easy axis.Theoretical analysis is provided that explains these observations. We argue that resonant spin tunneling in a molecular magnet can be established in a powder sample, without the need for amoresingle crystal and without aligning the easy magnetization axes of the molecules. This is confirmed by re-analyzing the old data on a powdered sample of non-oriented micron-size crystals of Mn?? acetate. Our findings can greatly simplify the selection of candidates for quantum spin tunneling among newly synthesized molecular magnets.less

  1. HgMn Stars as apparent X-ray emitters

    E-Print Network [OSTI]

    Hubrig, S; Mathys, G

    1998-01-01

    In the ROSAT all-sky survey 11 HgMn stars were detected as soft X-ray emitters (Berghoefer, Schmitt & Cassinelli 1996). Prior to ROSAT, X-ray observations with the Einstein Observatory had suggested that stars in the spectral range B5-A7 are devoid of X-ray emission. Since there is no X-ray emitting mechanism available for these stars (also not for HgMn stars), the usual argument in the case of an X-ray detected star of this spectral type is the existence of an unseen low-mass companion which is responsible for the X-ray emission. The purpose of the present work is to use all available data for our sample of X-ray detected HgMn stars and conclude on the nature of possible companions.

  2. Resonant spin tunneling in randomly oriented nanospheres of Mn?? acetate

    SciTech Connect (OSTI)

    Lendinez, S. [Univ. de Barcelona, Barcelona, Spain (Europe); Billinge, S. J. L. [Columbia Univ., New York, NY (United States); Zarzuela, R. [Univ. de Barcelona, Barcelona, Spain (Europe); Tejada, J. [Univ. de Barcelona, Barcelona, Spain (Europe); Terban, M. W. [Columbia Univ., New York, NY (United States); Espin, J. [Univ. Autonoma Barcelona, Barcelona, Spain (Europe); Imaz, I. [Univ. Autonoma Barcelona, Barcelona, Spain (Europe); Maspoch, D. [Univ. Autonoma Barcelona, Barcelona, Spain (Europe); Chudnovsky, E. M. [City Univ. of New York, Bronx, NY (United States)

    2015-01-01

    We report measurements and theoretical analysis of resonant spin tunneling in randomly oriented nanospheres of a molecular magnet. Amorphous nanospheres of Mn?? acetate have been fabricated and characterized by chemical, infrared, TEM, X-ray, and magnetic methods. Magnetic measurements have revealed sharp tunneling peaks in the field derivative of the magnetization that occur at the typical resonant field values for the Mn?? acetate crystal in the field parallel to the easy axis.Theoretical analysis is provided that explains these observations. We argue that resonant spin tunneling in a molecular magnet can be established in a powder sample, without the need for a single crystal and without aligning the easy magnetization axes of the molecules. This is confirmed by re-analyzing the old data on a powdered sample of non-oriented micron-size crystals of Mn?? acetate. Our findings can greatly simplify the selection of candidates for quantum spin tunneling among newly synthesized molecular magnets.

  3. Assessment of the Diffusive Gradients in Thin-films (DGT) technique to assess the plant availability of Mn in soils.

    E-Print Network [OSTI]

    Mundus, Simon; Husted, Sren; Lombi, Enzo

    2009-01-01

    predicts copper availability to plants. EnvironmentalAttempts to assess Mn availability have been impeded due towill influence the Mn availability. Often flooding of soils

  4. Ferromagnetism in Mn-Implanted Epitaxially Grown Ge on Si(100)

    E-Print Network [OSTI]

    Guchhait, S.

    2011-01-01

    segregation in Mn-doped Ge, Journal of Applied Physics 101,Room-temperature ferromagnetism in Ge 1-x Mn x nanowires,BC high-?/metal gate Ge/C alloy pMOSFETs fabricated directly

  5. Single-molecule magnets assembled from oxime stabilized Mn?III triangles

    E-Print Network [OSTI]

    Stephenson, Casey Justin

    2009-01-01

    100, 157203. Chapter Three Double-Decker [NX 4 ] 2 [Mn 8 (76 Chapter Three Double-Decker [NX 4 ] 2 [Mn 8 (salox) 6 Opacking effects in two double decker complexes of the

  6. Electrodeposited Al-Mn Alloys with Microcrystalline, Nanocrystalline, Amorphous and Nano-quasicrystalline Structures

    E-Print Network [OSTI]

    Ruan, Shiyun

    AlMn alloys with Mn content ranging from 0 to 15.8 at.% are prepared by electrodeposition from an ionic liquid at room temperature, and exhibit a remarkably broad range of structures. The alloys are characterized through ...

  7. Activation of a MnO2 cathode by water-stimulated Mg2+ insertion...

    Office of Scientific and Technical Information (OSTI)

    Activation of a MnO2 cathode by water-stimulated Mg2+ insertion for a magnesium ion battery Citation Details In-Document Search Title: Activation of a MnO2 cathode by...

  8. X-Ray Spectroscopy of the Mn(4) Ca Cluster in the Water-Oxidation...

    Office of Scientific and Technical Information (OSTI)

    X-Ray Spectroscopy of the Mn(4) Ca Cluster in the Water-Oxidation Complex of Photosystem II Citation Details In-Document Search Title: X-Ray Spectroscopy of the Mn(4) Ca Cluster in...

  9. Ba and Ni speciation in a nodule of binary Mn oxide phase composition from Lake Baikal

    E-Print Network [OSTI]

    , and absorption spectroscopy. Fe is speciated as goethite, and Mn as romanechite (psilomelane) and 10 A is separated from the other type by goethite. The binary Mn oxide banding pattern is interpreted by a two

  10. In-situ Electrical Conductivity of LixMnO2 Nanowires as a Function...

    Office of Scientific and Technical Information (OSTI)

    In-situ Electrical Conductivity of LixMnO2 Nanowires as a Function of "x" and Size Citation Details In-Document Search Title: In-situ Electrical Conductivity of LixMnO2 Nanowires...

  11. Mn12-acetate thin film patterns and their interaction with superconductors

    E-Print Network [OSTI]

    Kim, Kyongwan

    2009-05-15

    Mn12-acetate single-molecule magnets (SMMs) are nano-scale magnets showing a strong magnetic anisotropy, slow relaxation and stepwise magnetic hysteresis curves. Possible applications of Mn12-acetate, e.g. for ultra high density magnetic information...

  12. A NOD2NALP1 complex mediates caspase-1-dependent IL-1 secretion in response to

    E-Print Network [OSTI]

    Nizet, Victor

    A NOD2NALP1 complex mediates caspase-1-dependent IL-1 secretion in response to Bacillus anthracis February 20, 2008) NOD2, a NOD-like receptor (NLR), is an intracellular sensor of bacterial muramyl, the molecular mechanism by which NOD2 can stimulate IL-1 secretion, and its biological significance were

  13. En quoi Turing a-t-il chang ma vie de chercheur ?

    E-Print Network [OSTI]

    van Tiggelen, Bart

    1912-2012 ALAN TURING En quoi Turing a-t-il chang ma vie de chercheur ? PIERRE LESCANNE (LIP, CNRS scientifique gnial, prolifique et polyvalent. Que se serait-il pass alors ? 1Les machines computer d'Alan Turing, Bulletin de SPECIF n63 (avril 2010) #12;

  14. Cell type-specific roles of Jak3 in IL-2-induced proliferative signal transduction

    SciTech Connect (OSTI)

    Fujii, Hodaka . E-mail: hodaka@med.nyu.edu

    2007-03-16

    Binding of interleukin-2 (IL-2) to its specific receptor induces activation of two members of Jak family protein tyrosine kinases, Jak1 and Jak3. An IL-2 receptor (IL-2R)-reconstituted NIH 3T3 fibroblast cell line proliferates in response to IL-2 only when hematopoietic lineage-specific Jak3 is ectopically expressed. However, the mechanism of Jak3-dependent proliferation in the fibroblast cell line is not known. Here, I showed that Jak3 expression is dispensable for IL-2-induced activation of Jak1 and Stat proteins and expression of nuclear proto-oncogenes in the IL-2R-reconstituted fibroblast cell line. Jak3 expression markedly enhanced these IL-2-induced signaling events. In contrast, Jak3 expression was essential for induction of cyclin genes involved in the G1-S transition. These data suggest a critical role of Jak3 in IL-2 signaling in the fibroblast cell line and may provide further insight into the cell type-specific mechanism of cytokine signaling.

  15. Blockage of IL-6 secretion in glia by lead and mercury

    E-Print Network [OSTI]

    Pourrajabi, Nima Matthew

    2003-01-01

    , we constructed an IL-6-EGFP chimera and transiently transfected rat C6 glioma cells and rat primary astroglia. IL-6-EGFP signal in transfected cultures exposed to Pb, Hg, or anti-oligos against GRP78 was detected with a bio-image fluorescence...

  16. BANDO PER IL RECLUTAMENTO DI UN RICERCATORE CON RAPPORTO DI LAVORO A TEMPO DETERMINATO TIPOLOGIA A

    E-Print Network [OSTI]

    Di Pillo, Gianni

    Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" Visti i DD.MM. 4.10.2000 e 9.1.2001 concernenti.03.2012; Vista la Convenzione stipulata tra il Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" e la Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" nella seduta del 28.05.2013; Visto il parere

  17. BANDO PER IL RECLUTAMENTO DI UN RICERCATORE CON RAPPORTO DI LAVORO A TEMPO DETERMINATO TIPOLOGIA A

    E-Print Network [OSTI]

    Di Pillo, Gianni

    A Bando RTD n. 01/2014 Il Direttore del Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer delibere del Consiglio del Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" del 18.12.2013 e Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" il SSD BIO/09 ha pertinenza prevalente D E C R E

  18. Bando per il reclutamento di un Ricercatore a Tempo Determinato APPROVAZIONE ATTI

    E-Print Network [OSTI]

    Di Pillo, Gianni

    Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" Visto il Regolamento per il reclutamento di Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" dell'8 giugno 2010 e del 30 settembre 2010; Vista delibera del Consiglio di Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" del 19 novembre

  19. IL DIRIGENTE VISTA la Legge 2 dicembre 1991, n. 390 Norme sul diritto agli studi universitari;

    E-Print Network [OSTI]

    ; VISTO il Regolamento per l'Amministrazione, la Finanza e la Contabilit, emanato con D.R. n. 82/AG del studenti meritevoli mediante rimborso di una parte del costo sostenuto dagli studenti interessati ad dei requisiti necessari per parteciparvi. Il rimborso previsto sar pari al 75% del costo del corso

  20. De novo design of an IL-4 antagonist and its structure at 1.9

    E-Print Network [OSTI]

    Stroud, Robert

    De novo design of an IL-4 antagonist and its structure at 1.9 Sherry L. LaPorte*, Charles M. Stroud, December 17, 2004 An IL-4 antagonist was designed based on structural and biochem- ical analysis at the level of side-chains and secondary structure element interactions. de novo protein design helical bundle

  1. Start S Morgan St End 1933 W Polk St, Chicago, IL 60612

    E-Print Network [OSTI]

    Spirtes, Peter

    Start S Morgan St End 1933 W Polk St, Chicago, IL 60612 When 10/5/11 after 9:09pm Duration 19 mins total Loading... 2011 Google - Map data 2011 Google, Sanborn - S Morgan St to 1933 W Polk St, Chicago District Walk to 1933 W Polk St, Chicago, IL 60612 Beta: Use caution This route may be missing sidewalks

  2. IL-8 Production in Human Lung Fibroblasts and Epithelial Cells Activated by the Pseudomonas Autoinducer

    E-Print Network [OSTI]

    Springer, Timothy A.

    IL-8 Production in Human Lung Fibroblasts and Epithelial Cells Activated by the Pseudomonas is caused, in part, by the produc- tion of the chemokine IL-8, which recruits neutrophils into the lung. These findings support the concept that the severe lung damage that accompanies P. aeruginosa infections

  3. Centro di Ricerca Il Direttore del Centro di Ricerca Hydro-Eco

    E-Print Network [OSTI]

    Di Pillo, Gianni

    Centro di Ricerca HYDRO-ECO HYDRO-ECO . Il Direttore del Centro di Ricerca Hydro-Eco Visto il D Vista la Delibera del Consiglio del Centro Hydro-Eco del 15/9/2010 Vista la Delibera del Senato Ricerca Hydro-Eco cos composta: Rosario Cantelli Angelo Chianese Paolo De Filippis Stefania Panero

  4. Harnessing the power of Deep Learning :sromanka@tx.technion.ac.il Roman Kaplan

    E-Print Network [OSTI]

    Cidon, Israel

    " Harnessing the power of Deep Learning :sromanka@tx.technion.ac.il Roman Kaplan The hottest topic the exact application 2. We think how to implement the right system. 3. We (mostly you) chooseReduce, Hadoop/Spark/GraphLab. Use Machine Learning for Your Desired Purpose :sromanka@tx.technion.ac.il Roman

  5. Magnetization relaxation in (Ga,Mn)As ferromagnetic semiconductors

    E-Print Network [OSTI]

    Sinova, Jairo; Jungwirth, T.; Liu, X.; Sasaki, Y.; Furdyna, JK; Atkinson, WA; MacDonald, AH.

    2004-01-01

    stream_source_info PhysRevB.69.085209.pdf.txt stream_content_type text/plain stream_size 32392 Content-Encoding ISO-8859-1 stream_name PhysRevB.69.085209.pdf.txt Content-Type text/plain; charset=ISO-8859-1 n . s re... of the theory of the Mn spin- wave dispersion, and reflect the retarded and nonlocal char- acter of the valence-band-hole mediated interactions between Mn moments.11 The Gilbert damping of magnetization pre- cession discussed here is the aspect of this long...

  6. Mixing antiferromagnets to tune NiFe-[IrMn/FeMn] interfacial spin-glasses, grains thermal stability, and related exchange bias properties

    SciTech Connect (OSTI)

    Akmaldinov, K.; Ducruet, C.; Portemont, C.; Joumard, I.; Prejbeanu, I. L.; Dieny, B.; Baltz, V.

    2014-05-07

    Spintronics devices and in particular thermally assisted magnetic random access memories require a wide range of ferromagnetic/antiferromagnetic (F/AF) exchange bias (EB) properties and subsequently of AF materials to fulfil diverse functionality requirements for the reference and storage. For the reference layer, large EB energies and high blocking temperature (T{sub B}) are required. In contrast, for the storage layer, mostly moderate T{sub B} are needed. One of the present issues is to find a storage layer with properties intermediate between those of IrMn and FeMn and in particular: (i) with a T{sub B} larger than FeMn for better stability at rest-T but lower than IrMn to reduce power consumption at write-T and (ii) with improved magnetic interfacial quality, i.e., with reduced interfacial glassy character for lower properties dispersions. To address this issue, the EB properties of F/AF based stacks were studied for various mixed [IrMn/FeMn] AFs. In addition to EB loop shifts, the F/AF magnetic interfacial qualities and the AF grains thermal stability are probed via measurements of the low- and high-temperature contributions to the T{sub B} distributions, respectively. A tuning of the above three parameters is observed when evolving from IrMn to FeMn via [IrMn/FeMn] repetitions.

  7. Distinct local electronic structure and magnetism for Mn in amorphous Si and Ge

    E-Print Network [OSTI]

    Zeng, Li

    2010-01-01

    ferromagnetic Mn 5 Ge 3 for spintronic applications. Phys.dopants of interest for spintronic applications, where both

  8. Disentangling the Mn moments on different sublattices in the half-metallic ferrimagnet Mn3?xCoxGa

    SciTech Connect (OSTI)

    Klaer, P.; Jenkins, C.A.; Alijani, V.; Winterlik, J.; Balke, B.; Felser, C.; Elmers, H.J.

    2011-05-03

    Ferrimagnetic Mn{sub 3-x}Co{sub x}Ga compounds have been investigated by magnetic circular dichroism in x-ray absorption (XMCD). Compounds with x > 0.5 crystallize in the CuHg{sub 2}Ti structure. A tetragonal distortion of the cubic structure occurs for x {le} 0.5. For the cubic phase, magnetometry reveals a linearly increasing magnetization of 2x Bohr magnetons per formula unit obeying the generalized Slater-Pauling rule. XMCD confirms the ferrimagnetic character with Mn atoms occupying two different sublattices with antiparallel spin orientation and different degrees of spin localization and identifies the region 0.6 < x {le} 0.8 as most promising for a high spin polarization at the Fermi level. Individual Mn moments on inequivalent sites are compared to theoretical predictions.

  9. Electrochemical Performance of LiMnPO[subscript 4] Synthesized with Off-Stoichiometry

    E-Print Network [OSTI]

    Kang, Byoungwoo

    LiMnPO[subscript 4] was synthesized from an off-stoichiometric mix of starting materials with nominal composition LiMn[subscript 0.9]P[subscript 0.95]O[subscript 4??]. Stoichiometric LiMnPO[subscript 4] with particle size ...

  10. Cationic disorder and Mn{sup 3+}/Mn{sup 4+} charge ordering in the B? and B? sites of Ca{sub 3}Mn{sub 2}NbO{sub 9} perovskite: a comparison with Ca{sub 3}Mn{sub 2}WO{sub 9}

    SciTech Connect (OSTI)

    Lpez, C.A.; Saleta, M.E.; Pedregosa, J.C.; Snchez, R.D.; Alonso, J.A.; and others

    2014-02-15

    We describe the preparation, crystal structure determination, magnetic and transport properties of two novel Mn-containing perovskites, with a different electronic configuration for Mn atoms located in B site. Ca{sub 3}Mn{sup 3+}{sub 2}WO{sub 9} and Ca{sub 3}Mn{sup 3+/4+}{sub 2}NbO{sub 9} were synthesized by standard ceramic procedures; the crystallographic structure was studied from X-ray powder diffraction (XRPD) and neutron powder diffraction (NPD). Both phases exhibit a monoclinic symmetry (S.G.: P2{sub 1}/n); Ca{sub 3}Mn{sub 2}WO{sub 9} presents a long-range ordering over the B sites, whereas Ca{sub 3}Mn{sub 2}NbO{sub 9} is strongly disordered. By in-situ NPD, the temperature evolution of the structure study presents an interesting evolution in the octahedral size (?MnO?) for Ca{sub 3}Mn{sub 2}NbO{sub 9}, driven by a charge ordering effect between Mn{sup 3+} and Mn{sup 4+} atoms, related to the anomaly observed in the transport measurements at T?160 K. Both materials present a magnetic order below T{sub C}=30 K and 40 K for W and Nb materials, respectively. The magneto-transport measurements display non-negligible magnetoresistance properties in the paramagnetic regime. - Graphical abstract: Comparison between the octahedron size and the magnetic behaviour for Ca{sub 3}Mn{sub 2}NbO{sub 9} in the temperature region where the charge and magnetic order occur. Display Omitted - Highlights: Two novel Mn-containing double perovskites were obtained by solid-state reactions. Both double perovskites are monoclinic (P2{sub 1}/n) determined by XRPD and NPD. Ca{sub 3}Mn{sub 2}WO{sub 9} contains Mn{sup 3+} while Ca{sub 3}Mn{sub 2}NbO{sub 9} includes mixed-valence cations Mn{sup 3+}/Mn{sup 4+}. Ca{sub 3}Mn{sub 2}NbO{sub 9} presents a charge-ordering effect between Mn{sup 3+} and Mn{sup 4+} evidenced by NPD. The magnetic and transport studies evidenced the charge ordering in Ca{sub 3}Mn{sub 2}NbO{sub 9}.

  11. Department of Civil Engineering, Northwestern University, Evanston, IL 60208.1 GeoTDR, Inc., 297 Pinewood Drive, Apple Valley, MN 55124.2

    E-Print Network [OSTI]

    from the intensity and type of reflection. For example, a cable can be installed through a foundation. These examples include, 1) cables in roadways above possible coal mine subsidence, 2) cables through scour. The waveform shape is a function of the type and magnitude of cable damage. The travel time is converted

  12. AVVISO PUBBLICO DI SELEZIONE PER IL CONFERIMENTO DI UN INCARICO DI COLLABORAZIONE COORDINATA E CONTINUATIVA DA ATTIVARE PER LE ESIGENZE

    E-Print Network [OSTI]

    Di Pillo, Gianni

    e sviluppo di algoritmi efficienti per il problema del bilancio energetico cellulare. Articolo 1 La molecolari reali e sviluppo di algoritmi efficienti per il problema del bilancio energetico cellulare

  13. Growing the renewable chemicals and advanced biofuels cluster in MN

    E-Print Network [OSTI]

    Levinson, David M.

    Growing the renewable chemicals and advanced biofuels cluster in MN #12;Renewable Chemical Value% Reduction 60% Reduction 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Gasoline Corn Ethanol Advanced Biofuel Cellulosic Biofuel Corn Ethanol 20% GHG Reduction Compared to gasoline: Advanced Biofuel 50% GHG Reduction e

  14. Lindisciplina e il suo contenuto sociale da Collodi alle riletture di Carmelo Bene e Luigi Malerba

    E-Print Network [OSTI]

    Righi, Andrea

    2011-01-01

    Bergson, Henri. 1982. ll riso. Saggio sul significato delproppiana, si genera il riso spontaneo che Henri Bergson

  15. An Experimental Study of Mn12-Family Molecular Magnets in Isolation with High Spatial Resolution

    E-Print Network [OSTI]

    Reaves, Kelley Thomas

    2014-12-17

    atoms. The radius of the Mn atoms has been modified from their ionic radius for clarity. . . . . . . . . . . . . 15 2.4 Magnetization of Mn12-Ph powder sample as a function of applied magnetic field at different temperatures, 1.8K ? T ? 10K. The measured... large circles are Mn3+ ions, the lighter colored large circles are Mn4+ ions, the smaller black circles are O atoms, and the lines indicate a chemical bond (of O to Mn). This double shell has tetragonal symmetry and consists of an inner shell...

  16. *Correspondence address. Fermilab, MS 122 E 871, Batavia, IL 60510, USA. Fax: 16308403867.

    E-Print Network [OSTI]

    Fermilab Experiment E871

    #Department of Physics, University of Virginia, Charlottesville, VA 22901, USA Received 28 March 2000 Inc., 1161 Homestead Ln., Chanhassen, MN 55317. # Exabyte Corp., 1685 38th St., Boulder, CO 80301

  17. Effect of Mn substitution on the transport properties of co-sputtered Fe{sub 3?x}Mn{sub x}Si epilayers

    SciTech Connect (OSTI)

    Tang, M.; Jin, C.; Bai, H. L.

    2014-11-07

    Motivated by the theoretical calculations that Fe{sub 3?x}Mn{sub x}Si can simultaneously exhibit a high spin polarization with a high Curie temperature to be applied in spintronic devices, and in order to further study the effect of Mn contents on the physical properties of Fe{sub 3?x}Mn{sub x}Si, we have investigated the effect of Mn substitution on the transport properties of epitaxial Fe{sub 3?x}Mn{sub x}Si (0?x?1) films systematically. The Fe{sub 3?x}Mn{sub x}Si films were epitaxially grown on MgO(001) plane with 45 rotation. The magnetization for various x shows enhanced irreversibility, implying the antiferromagnetic ordering induced by the substitution of Mn. A metal-semiconductor crossover was observed due to the enhanced disorders of interactions and the local lowering of symmetry induced by the substitution of Mn. The single-domain state in the Fe{sub 3?x}Mn{sub x}Si films leads to twofold symmetric curves of the anisotropic magnetoresistance and planar Hall resistivity.

  18. Role of t{sub 2g} electrons in Mn-Tb coupling of multiferroic TbMnO{sub 3}

    SciTech Connect (OSTI)

    Guo, Y. Y.; Wang, Y. L.; Liu, J.-M.; Wei, T.

    2014-08-14

    We investigate the effect of Cr-doping in polycrystalline TbMn{sub 1?x}Cr{sub x}O{sub 3} (x???6%) ceramics on the magnetism, ferroelectricity, and dielectricity. The Cr substitution gradually suppresses the ferroelectricity induced by the Mn spiral spin ordering, and results in a stronger modulation of polarization by magnetic field with increasing x. However, the transition temperature T{sub Tb} corresponding to onset of Tb magnetic ordering has barely shifted with Cr doping. In other words, although the Cr-doping obviously disrupts the Mn spiral spin ordering, the exchange field J{sub Mn-Tb} acting on the Tb moments from the Mn-spin structure is hardly impacted. Our work demonstrates that the e{sub g} electron of Mn{sup 3+} plays an important role in forming the Mn spiral spin order, but the f-d exchange interaction between the Mn 3d spins and the Tb 4f moments in multiferroic TbMnO{sub 3} almost involves only the t{sub 2g} electrons.

  19. Biological Mn(II) oxidation in freshwater and marine systems : new perspectives on reactants, mechanisms and microbial catalysts of Mn cycling in the environment

    E-Print Network [OSTI]

    Clement, Brian Gregory

    2006-01-01

    a mining-related acid drainage problem. Applied Geochemistrya mining-related acid drainage problem. Applied GeochemistryBioremediation of Acid Mine Drainage: Mn(II) Oxidation at

  20. Controlling Mn depth profiles in GaMnAs during high-temperature molecular beam epitaxial growth

    E-Print Network [OSTI]

    Thibado, Paul M.

    , or spintronics [1]. The reason for this is that, compared to conventional electronic devices, spin-based devices be suitable for spintronics. For example, the discovery of ferromagnetism in Mn-doped GaAs grown by MBE [4] has led to interest in it as an ideal material for spintronics applications [5,6]. The future success

  1. Electronic structure and magnetism of Mn{sub 12}O{sub 12} clusters

    SciTech Connect (OSTI)

    Pederson, M.R. [Complex Systems Theory Branch-6692, Naval Research Laboratory, Washington, D.C. 20375-5000 (United States)] [Complex Systems Theory Branch-6692, Naval Research Laboratory, Washington, D.C. 20375-5000 (United States); Khanna, S.N. [Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284-2000 (United States)] [Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284-2000 (United States)

    1999-01-01

    To address the ferrimagnetic state of the Mn{sub 12} acetate matrix [Mn{sub 12}O{sub 12}(CH{sub 3}COO){sub 16}(H{sub 2}O){sub 4}] we have performed all-electron gradient-corrected density-functional calculations on (MnO){sub n} with n=1, 2, 4, and 12. In contrast to bulk MnO which is antiferromagnetic, the small (MnO){sub n} (n=1, 2, and 4) clusters are ferromagnetic with Mn moments of 5.0{mu}{sub B} but the ground state of Mn{sub 12}O{sub 12} is ferrimagnetic with a total magnetic moment of 20.0{mu}{sub B} as observed experimentally. The inner Mn sites in Mn{sub 12}O{sub 12} are found to have localized moments of 4.1{mu}{sub B} which are antiferromagnetically coupled to two types of outer Mn with moments of 4.2{mu}{sub B}. The cluster is shown to be marked by ionic as well as covalent bonds between Mn d and O p electrons and a strong intracluster magnetic coupling. {copyright} {ital 1999} {ital The American Physical Society}

  2. Giant Magnetic Moments and Magnetic Bistability of Stoichiomatric MnO Clusters

    SciTech Connect (OSTI)

    Nayak, S.K.; Jena, P. [Physics Department, Virginia Commonwealth University, Richmond, Virginia 23284-2000 (United States)] [Physics Department, Virginia Commonwealth University, Richmond, Virginia 23284-2000 (United States)

    1998-10-01

    {ital Abthinspthinspinitio} calculations based on density functional theory and generalized gradient approximation reveal many unusual features of stoichiometric (MnO){sub x} (x{le}9) clusters that contrast with their bulk behavior. The clusters are ferromagnetic and carry atomiclike magnetic moments ranging from 4{mu}{sub B} to 5{mu}{sub B} per MnO unit, and the moments are localized at the Mn sites. The (MnO){sub 8} cluster, in particular, exhibits nearly degenerate ferromagnetic and atypical antiferromagnetic solutions with the ferromagnetic structure carrying a moment of 40{mu}{sub B} . The structures of (MnO){sub x} clusters are also unique with cubic and hexagonal forms competing for stability. (MnO){sub 2} and (MnO){sub 3} are unusually stable and form the foundation for further growth. {copyright} {ital 1998} {ital The American Physical Society}

  3. X-ray absorption study of the electronic structure of Mn-doped amorphous Si

    SciTech Connect (OSTI)

    Arenholz, Elke; Zeng, Li; Huegel, A.; Helgren, E.; Hellman, F.; Piamonteze, C.; Arenholz, E.

    2008-03-08

    The electronic structure of Mn in amorphous Si (a-Mn{sub x}Si{sub 1?x}) is studied by X-ray absorption spectroscopy at the Mn L{sub 3,2} edges for x = 0.005-0.18. Except the x = 0.005 sample, which shows a slight signature of Mn{sup 2+} atomic multiplets associated with a local Mn moment, all samples have broad and featureless L{sub 3,2} absorption peaks, corresponding to an itinerant state for all 3d electrons. The broad X-ray absorption spectra exclude the possibility of a localized 3d moment and explain the unexpectedly quenched Mn moment in this magnetically-doped amorphous semiconductor. Such a fully delocalized d state of Mn dopant in Si has not been previously suggested.

  4. Atomic-resolution study of Mn tetramer clusters using scanning tunneling Rong Yang, Haiqiang Yang, and Arthur R. Smitha

    E-Print Network [OSTI]

    Atomic-resolution study of Mn tetramer clusters using scanning tunneling microscopy Rong Yang clusters is investigated. The clusters are composed of a quadrant array of Mn atoms forming a tetramer of manganese nitride, on which are stabilized peri- odic, self-organized array of MnN-bonded Mn tetramer clus

  5. Plutonium Oxidation and Subsequent Reduction by Mn (IV) Minerals

    SciTech Connect (OSTI)

    KAPLAN, DANIEL

    2005-09-13

    Plutonium sorbed to rock tuff was preferentially associated with manganese oxides. On tuff and synthetic pyrolusite (Mn{sup IV}O{sub 2}), Pu(IV) or Pu(V) was initially oxidized, but over time Pu(IV) became the predominant oxidation state of sorbed Pu. Reduction of Pu(V/VI), even on non-oxidizing surfaces, is proposed to result from a lower Gibbs free energy of the hydrolyzed Pu(IV) surface species versus that of the Pu(V) or Pu(VI) surface species. This work suggests that despite initial oxidation of sorbed Pu by oxidizing surfaces to more soluble forms, the less mobile form of Pu, Pu(IV), will dominate Pu solid phase speciation during long term geologic storage. The safe design of a radioactive waste or spent nuclear fuel geologic repository requires a risk assessment of radionuclides that may potentially be released into the surrounding environment. Geochemical knowledge of the radionuclide and the surrounding environment is required for predicting subsurface fate and transport. Although difficult even in simple systems, this task grows increasingly complicated for constituents, like Pu, that exhibit complex environmental chemistries. The environmental behavior of Pu can be influenced by complexation, precipitation, adsorption, colloid formation, and oxidation/reduction (redox) reactions (1-3). To predict the environmental mobility of Pu, the most important of these factors is Pu oxidation state. This is because Pu(IV) is generally 2 to 3 orders of magnitude less mobile than Pu(V) in most environments (4). Further complicating matters, Pu commonly exists simultaneously in several oxidation states (5, 6). Choppin (7) reported Pu may exist as Pu(IV), Pu(V), or Pu(VI) oxic natural groundwaters. It is generally accepted that plutonium associated with suspended particulate matter is predominantly Pu(IV) (8-10), whereas Pu in the aqueous phase is predominantly Pu(V) (2, 11-13). The influence of the character of Mn-containing minerals expected to be found in subsurface repository environments on Pu oxidation state distributions has been the subject of much recent research. Kenney-Kennicutt and Morse (14), Duff et al. (15), and Morgenstern and Choppin (16) observed oxidation of Pu facilitated by Mn(IV)-bearing minerals. Conversely, Shaughnessy et al. (17) used X-ray Absorption near-edge spectroscopy (XANES) to show reduction of Pu(VI) by hausmannite (Mn{sup II}Mn{sub 2}{sup III}O{sub 4}) and manganite ({gamma}-Mn{sup III}OOH) and Kersting et al., (18) observed reduction of Pu(VI) by pyrolusite (Mn{sup IV}O{sub 2}). In this paper, we attempt to reconcile the apparently conflicting datasets by showing that Mn-bearing minerals can indeed oxidize Pu, however, if the oxidized species remains on the solid phase, the oxidation step competes with the formation of Pu(IV) that becomes the predominant solid phase Pu species with time. The experimental approach we took was to conduct longer term (approximately two years later) oxidation state analyses on the Pu sorbed to Yucca Mountain tuff (initial analysis reported by Duff et al., (15)) and measure the time-dependant changes in the oxidation state distribution of Pu in the presence of the Mn mineral pyrolusite.

  6. Prot. n. 1174/2013 SELEZIONE PER IL CONFERIMENTO DI N. 1 ASSEGNO PER LO

    E-Print Network [OSTI]

    categoria B Tipologia II Analisi di risposta sismica locale in aree edificate, analisi dell'interazione dell'edificato con il sottosuolo; valutazione degli effetti del non sincronismo dell'azione sismica

  7. Prot. n. 730/2014 SELEZIONE PER IL CONFERIMENTO DI N. 1 ASSEGNO PER LO

    E-Print Network [OSTI]

    Tipologia I Analisi di risposta sismica locale in aree edificate, analisi dell'interazione dell'edificato con il sottosuolo; valutazione degli effetti del non sincronismo dell'azione sismica sulle costruzioni

  8. Prot. n. 1167/2013 SELEZIONE PER IL CONFERIMENTO DI N. 1 ASSEGNO PER LO

    E-Print Network [OSTI]

    Analisi di risposta sismica locale in aree edificate, analisi dell'interazione dell'edificato con il sottosuolo; valutazione degli effetti del non sincronismo dell'azione sismica sulle costruzioni; livelli di

  9. DEVELOPING METHODS FOR ANTAGONIZING TNF-? AND IL-1? IN THE CENTRAL NERVOUS SYSTEM

    E-Print Network [OSTI]

    Hardin, Elizabeth Ashley

    2006-08-16

    harvested to examine the development of glucocorticoid resistance (GCR), a hallmark of SDR, in the TNF-? study only. The ELISA assay was not sensitive enough to the tissue levels of TNF-?, therefore successful antagonism was undetectable. In contrast, IL-1...

  10. Magnetic field-induced phase transformation and variant reorientation in Ni2MnGa and NiMnCoIn magnetic shape memory alloys

    E-Print Network [OSTI]

    Karaca, Haluk Ersin

    2009-05-15

    The purpose of this work is to reveal the governing mechanisms responsible for the magnetic field-induced i) martensite reorientation in Ni2MnGa single crystals, ii) stress-assisted phase transformation in Ni2MnGa single ...

  11. Manganese valence and coordination structure in Mn,Mg-codoped {gamma}-AlON green phosphor

    SciTech Connect (OSTI)

    Takeda, Takashi; Xie, Rong-Jun; Hirosaki, Naoto; Matsushita, Yoshitaka; Honma, Tetuso

    2012-10-15

    The valence and coordination structure of manganese in a Mn,Mg-codoped {gamma}-AlON spinel-type oxynitride green phosphor were studied by synchrotron X-ray diffraction and absorption fine structure measurements. The absorption edge position of the XANES revealed the bivalency of Mn. Two cation sites are available in the spinel structure for cation doping: a tetrahedral site and an octahedral site. The pre-edge of the XANES and the distance to the nearest neighbor atoms obtained from the EXAFS measurement showed that Mn was situated at the tetrahedral site. Rietveld analysis showed that the vacancy occupied the octahedral site. The preferential occupation of the tetrahedral site by Mn and the roles of N and Mg are discussed in relation to the spinel crystal structure. - Graphical Abstract: Fourier transform of EXAFS of Mn K-edge for Mn,Mg-codoped green phosphor and Mn coordination structure. Highlights: Black-Right-Pointing-Pointer Mn, Mg-codoped {gamma}-AlON green phosphor for white LED. Black-Right-Pointing-Pointer The valence of Mn is divalent. Black-Right-Pointing-Pointer Mn occupies the tetrahedral site in the spinel structure.

  12. Ferromagnetic interactions and martensitic transformation in Fe doped Ni-Mn-In shape memory alloys

    SciTech Connect (OSTI)

    Lobo, D. N.; Priolkar, K. R.; Emura, S.; Nigam, A. K.

    2014-11-14

    The structure, magnetic, and martensitic properties of Fe doped Ni-Mn-In magnetic shape memory alloys have been studied by differential scanning calorimetry, magnetization, resistivity, X-ray diffraction (XRD), and EXAFS. While Ni{sub 2}MnIn{sub 1?x}Fe{sub x} (0???x???0.6) alloys are ferromagnetic and non martensitic, the martensitic transformation temperature in Ni{sub 2}Mn{sub 1.5}In{sub 1?y}Fe{sub y} and Ni{sub 2}Mn{sub 1.6}In{sub 1?y}Fe{sub y} increases for lower Fe concentrations (y???0.05) before decreasing sharply for higher Fe concentrations. XRD analysis reveals presence of cubic and tetragonal structural phases in Ni{sub 2}MnIn{sub 1?x}Fe{sub x} at room temperature with tetragonal phase content increasing with Fe doping. Even though the local structure around Mn and Ni in these Fe doped alloys is similar to martensitic Mn rich Ni-Mn-In alloys, presence of ferromagnetic interactions and structural disorder induced by Fe affect Mn-Ni-Mn antiferromagnetic interactions resulting in suppression of martensitic transformation in these Fe doped alloys.

  13. Effect of composition and heat treatment on MnBi magnetic materials

    SciTech Connect (OSTI)

    Cui, Jun [Pacific Northwest National Laboratory; Choi, Jung-Pyung [Pacific Northwest National Laboratory; Polikarpov, Evgueni [Pacific Northwest National Laboratory; Bowden, Mark E [Pacific Northwest National Laboratory; Xie, Wei [Pacific Northwest National Laboratory; Li, Guosheng [Pacific Northwest National Laboratory; Nie, Zimin [Pacific Northwest National Laboratory; Zarkevich, Nikolai [Ames Laboratory; Kramer, Matthew J [Ames Laboratory; Johnson, Duane [Ames Laboratory

    2014-10-01

    The metallic compound MnBi is a promising rare-earth-free permanent magnet material, unique among all candidates for its high intrinsic coercivity (Hci) and its large positive temperature coefficient. The Hci of MnBi in thin-film or powder form can exceed 12 and 26 kOe at 300 and 523 K, respectively. Such a steep rise in Hci with increasing temperature is unique to MnBi. Consequently, MnBi is a highly sought-after hard phase for exchange coupling nanocomposite magnets. However, the reaction between Mn and Bi is peritectic, and hence Mn tends to precipitate out of the MnBi liquid during the solidification process. As result, when the alloy is prepared using conventional induction or arc-melting casting methods, additional Mn is required to compensate the precipitation of Mn. In addition to composition, post-casting annealing plays an important role in obtaining a high content of MnBi low-temperature phase (LTP) because the annealing encourages the Mn precipitates and the unreacted Bi to react, forming the desired LTP phase. Here we report a systematic study of the effect of composition and heat treatments on the phase content and magnetic properties of MnBi alloys. In this study, 14 compositions were prepared using conventional metallurgical methods, and the compositions, crystal structures, phase content and magnetic properties of the resulting alloys were analyzed. The results show that the composition with 55 at.% Mn exhibits both the highest LTP content (93 wt.%) and magnetization (74 emu g?1 with 9 T applied field at 300 K).

  14. On the state of Mn impurity implanted in Si

    SciTech Connect (OSTI)

    Orlov, A. F.; Bublik, V. T.; Vdovin, V. I.; Agafonov, Yu. A.; Balagurov, L. A.; Zinenko, V. I.; Kulemanov, I. V.; Shcherbachev, K. D.

    2009-07-15

    The state of manganese impurity in implanted silicon at implantation doses of up to 5 x 10{sup 16} cm{sup -2} has been investigated by X-ray diffraction and transmission electron microscopy. It is established that, after short-term vacuum annealing at 850{sup o}C, most of the implanted manganese impurities are in microinclusions up to 20 nm in size formed by a tetragonal silicide phase of the Mn{sub 15}Si{sub 26} type.

  15. Large exchange bias enhancement in (Pt(or Pd)/Co)/IrMn/Co trilayers with ultrathin IrMn thanks to interfacial Cu dusting

    SciTech Connect (OSTI)

    Vinai, G. [SPINTEC, UMR 8191 CEA/CNRS/UJF/Grenoble-INP, CEA/INAC, 17, rue des Martyrs, 38054 Grenoble (France); Crocus Technology, 4 Place Robert Schuman, 38054 Grenoble (France); Moritz, J. [Institut Jean Lamour, UMR 7198 CNRS - Universit de Lorraine, Bd des Aiguillettes, BP 70239, F-54506 Vandoeuvre-les-Nancy Cedex (France); Bandiera, S. [Crocus Technology, 4 Place Robert Schuman, 38054 Grenoble (France); Prejbeanu, I. L.; Dieny, B. [SPINTEC, UMR 8191 CEA/CNRS/UJF/Grenoble-INP, CEA/INAC, 17, rue des Martyrs, 38054 Grenoble (France)

    2014-04-21

    The magnitude of exchange bias (H{sub ex}) at room temperature can be significantly enhanced in IrMn/Co and (Pt(or Pd)/Co)/IrMn/Co structures thanks to the insertion of an ultrathin Cu dusting layer at the IrMn/Co interface. The combination of trilayer structure and interfacial Cu dusting leads to a three-fold increase in H{sub ex} as compared to the conventional IrMn/Co bilayer structure, with an increased blocking temperature (T{sub B}) and a concave curvature of the temperature dependence H{sub ex}(T), ideal for improved Thermally Assisted-Magnetic Random Access Memory storage layer. This exchange bias enhancement is ascribed to a reduction of the spin frustration at the IrMn/Co interface thanks to interfacial Cu addition.

  16. PROCEDURA DI VALUTAZIONE COMPARATIVA PER IL RECLUTAMENTO DI N. 1 RICERCATORE CON RAPPORTO DI LAVORO A TEMPO DETERMINATO TIPOLOGIA A) PRESSO IL DIPARTIMENTO

    E-Print Network [OSTI]

    Di Pillo, Gianni

    A TEMPO DETERMINATO TIPOLOGIA A) PRESSO IL DIPARTIMENTO DI FISIOLOGIA E FARMACOLOGIA "VITTORIO ERSPAMER Commissione svolge i suoi lavori; - consegnati al Direttore del Dipartimento di Fisiologia e Farmacologia Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer", al fine di valutare i titoli del candidato e la

  17. Correspondence to: Christos T. Maravelias, Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Chemical and Biological Engineering, 1415 Engineering Dr., Madison, WI 53706, USA. E-mail: maravelias@wisc.edu

    E-Print Network [OSTI]

    Raines, Ronald T.

    of biomass feedstocks with higher sugar yields. In this study, we first develop and then evaluate an IL

  18. Investigation of structure, magnetic, and transport properties of Mn-doped SiC films

    SciTech Connect (OSTI)

    Sun Xianke [School of Material Science and Engineering, Tianjin University, Tianjin 300172 (China); Tianjin Key Laboratory for Photoelectric Materials and Devices, Tianjin University of Technology, Tianjin 300384 (China); Guo Ruisong [School of Material Science and Engineering, Tianjin University, Tianjin 300172 (China); An Yukai [Tianjin Key Laboratory for Photoelectric Materials and Devices, Tianjin University of Technology, Tianjin 300384 (China); School of Material Science and Engineering, Tianjin University of Technology, Tianjin 300384 (China); Liu Jiwen [School of Material Science and Engineering, Tianjin University, Tianjin 300172 (China); Tianjin Key Laboratory for Photoelectric Materials and Devices, Tianjin University of Technology, Tianjin 300384 (China); School of Material Science and Engineering, Tianjin University of Technology, Tianjin 300384 (China)

    2013-07-15

    Mn-doped SiC films were fabricated by radio frequency magnetron sputtering technique. The structure, composition, and magnetic and transport properties of the films were investigated. The results show the films have the 3C-SiC crystal structure and the doped Mn atoms in the form of Mn{sup 2+} ions substitute for C sites in SiC lattice. All the films are ferromagnetic at 300 K, and the ferromagnetism in films arises from the doped Mn atoms and some extended defects. In addition, the saturation magnetization increases with the Mn-doped concentration increasing. The Mn doping does not change the semiconductor characteristics of the SiC films.

  19. Ge{sub 1-x}Mn{sub x} heteroepitaxial quantum dots: Growth, morphology, and magnetism

    SciTech Connect (OSTI)

    Kassim, J.; Nolph, C.; Reinke, P.; Floro, J. [Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904 (United States); Jamet, M. [Institut Nanosciences et Cryogenie/SP2M, CEA-UJF, F-38054 Grenoble (France)

    2013-02-21

    Heteroepitaxial Ge{sub 1-x}Mn{sub x} quantum dots (QDs) were grown on Si (001) by molecular beam epitaxial co-deposition, with x = 0 to 0.10, in order to explore the interaction between Mn content, surface morphological evolution, and magnetism. Morphological evolution typical of the Ge/Si (001) system was observed, where the effect of Mn on surface morphology is surprisingly minimal at low Mn content, with no obvious surface morphological indicators of second phase formation. As the Mn content increases, secondary phase formation becomes evident, appearing to heterogeneously nucleate on or within Ge QDs. Still higher Mn concentrations lead to extensive second phase formation interspersed with an array of Ge QDs. Although ferromagnetism up to 220 K is observed, likely arising from intermetallic precipitates, there is no clear evidence for room-temperature ferromagnetism associated with a dilute magnetic solution phase.

  20. Time resolved magneto-optical studies of ferromagnetic InMnSb films

    SciTech Connect (OSTI)

    Frazier, M.; Kini, R. N.; Nontapot, K.; Khodaparast, G. A. [Department of Physics, Virginia Tech, Blacksburg, Virginia 24061 (United States); Wojtowicz, T. [Institute of Physics, Polish Academy of Sciences 02-668 Warsaw (Poland); Liu, X.; Furdyna, J. K. [Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556 (United States)

    2008-02-11

    We report time resolved magneto-optical measurements in InMnSb ferromagnetic films with 2% and 2.8% Mn contents grown by low temperature molecular beam epitaxy. In order to probe a possible interaction between the spins of photoexcited carriers and the Mn ions, we measured spin dynamics before and after aligning the Mn ions by applying an external magnetic field at temperatures above and below the samples' Curie temperatures. We observed no significant temperature or magnetic field dependence in the relaxation times and attribute the observed dynamics entirely to the relaxation of photoexcited electrons in the conduction band where the s-d coupling with the localized Mn ions is significantly weaker compared to the p-d exchange coupling. We observed several differences in the optical response of our InMnSb samples which could have been influenced mainly by the samples' growth conditions.

  1. Cr(OH)?(s) Oxidation Induced by Surface Catalyzed Mn(II) Oxidation

    SciTech Connect (OSTI)

    Namgung, Seonyi; Kwon, M.; Qafoku, Nikolla; Lee, Gie Hyeon

    2014-09-16

    This study examined the feasibility of Cr(OH)?(s) oxidation mediated by surface catalyzed Mn(II) oxidation under common groundwater pH conditions as a potential pathway of natural Cr(VI) contaminations. Dissolved Mn(II) (50 ?M) was reacted with or without synthesized Cr(OH)?(s) (1.0 g/L) at pH 7 9 under oxic or anoxic conditions. In the absence of Cr(OH)?(s), homogeneous Mn(II) oxidation by dissolved O? was not observed at pH ? 8.0 for 50 d. At pH 9.0, by contrast, dissolved Mn(II) was completely removed within 8 d and precipitated as hausmannite. When Cr(OH)?(s) was present, this solid was oxidized and released substantial amounts of Cr(VI) as dissolved Mn(II) was added into the suspension at pH ? 8.0 under oxic conditions. Our results suggest that Cr(OH)?(s) was readily oxidized by a newly formed Mn oxide as a result of Mn(II) oxidation catalyzed on Cr(OH)?(s) surface. XANES analysis of the residual solids after the reaction between 1.0 g/L Cr(OH)?(s) and 204 ?M Mn(II) at pH 9.0 for 22 d revealed that the product of surface catalyzed Mn(II) oxidation resembled birnessite. The rate and extent of Cr(OH)?(s) oxidation was likely controlled by those of surface catalyzed Mn(II) oxidation as the production of Cr(VI) increased with increasing pH and initial Mn(II) concentrations. This study evokes the potential environmental hazard of sparingly soluble Cr(OH)?(s) that can be a source of Cr(VI) in the presence of dissolved Mn(II).

  2. Structural and ferromagnetic properties of an orthorhombic phase of MnBi stabilized with Rh additions

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

    Taufour, Valentin; Thimmaiah, Srinivasa; March, Stephen; Saunders, Scott; Sun, Kewei; Lamichhane, Tej Nath; Kramer, Matthew J.; Budko, Sergey L.; Canfield, Paul C.

    2015-07-28

    The article addresses the possibility of alloy elements in MnBi which may modify the thermodynamic stability of the NiAs-type structure without significantly degrading the magnetic properties. The addition of small amounts of Rh and Mn provides an improvement in the thermal stability with some degradation of the magnetic properties. The small amounts of Rh and Mn additions in MnBi stabilize an orthorhombic phase whose structural and magnetic properties are closely related to the ones of the previously reported high-temperature phase of MnBi (HT MnBi). The properties of the HT MnBi, which is stable between 613 and 719 K, have notmorebeen studied in detail because of its transformation to the stable low-temperature MnBi (LT MnBi), making measurements near and below its Curie temperature difficult. The Rh-stabilized MnBi with chemical formula Mn1.0625xRhxBi [x=0.02(1)] adopts a new superstructure of the NiAs/Ni2In structure family. It is ferromagnetic below a Curie temperature of 416 K. The critical exponents of the ferromagnetic transition are not of the mean-field type but are closer to those associated with the Ising model in three dimensions. The magnetic anisotropy is uniaxial; the anisotropy energy is rather large, and it does not increase when raising the temperature, contrary to what happens in LT MnBi. The saturation magnetization is approximately 3?B/f.u. at low temperatures. Thus, while this exact composition may not be application ready, it does show that alloying is a viable route to modifying the stability of this class of rare-earth-free magnet alloys.less

  3. Electronic Structure and Oxidation State Changes in the Mn (4) Ca Cluster of Photosystem II

    SciTech Connect (OSTI)

    Yano, J.; Pushkar, Y.; Messinger, J.; Bergmann, U.; Glatzel, P.; Yachandra, V.K.; /SLAC

    2012-08-17

    Oxygen-evolving complex (Mn{sub 4}Ca cluster) of Photosystem II cycles through five intermediate states (S{sub i}-states, i = 0-4) before a molecule of dioxygen is released. During the S-state transitions, electrons are extracted from the OEC, either from Mn or alternatively from a Mn ligand. The oxidation state of Mn is widely accepted as Mn{sub 4}(III{sub 2},IV{sub 2}) and Mn{sub 4}(III,IV{sub 3}) for S{sub 1} and S{sub 2} states, while it is still controversial for the S{sub 0} and S{sub 3} states. We used resonant inelastic X-ray scattering (RIXS) to study the electronic structure of Mn{sub 4}Ca complex in the OEC. The RIXS data yield two-dimensional plots that provide a significant advantage by obtaining both K-edge pre-edge and L-edge-like spectra (metal spin state) simultaneously. We have collected data from PSII samples in the each of the S-states and compared them with data from various inorganic Mn complexes. The spectral changes in the Mn 1s2p{sub 3/2} RIXS spectra between the S-states were compared to those of the oxides of Mn and coordination complexes. The results indicate strong covalency for the electronic configuration in the OEC, and we conclude that the electron is transferred from a strongly delocalized orbital, compared to those in Mn oxides or coordination complexes. The magnitude for the S{sub 0} to S{sub 1}, and S{sub 1} to S{sub 2} transitions is twice as large as that during the S{sub 2} to S{sub 3} transition, indicating that the electron for this transition is extracted from a highly delocalized orbital with little change in charge density at the Mn atoms.

  4. Enhancing SMM properties via axial distortion of Mn-3(III) clusters

    E-Print Network [OSTI]

    Parsons S.; Brechin, E.K.; Collins A.; Karotsis G.; Jones L.F.; Inglis R.; Wernsdorfer W.; Perlepes S.P.

    2008-01-01

    Replacement of carboxylate and solvent with facially capping tripodal ligands enhances the single-molecule magnet (SMM) properties of [Mn-3(III)] triangles.

  5. Strain mediated coupling in magnetron sputtered multiferroic PZT/Ni-Mn-In/Si thin film heterostructure

    SciTech Connect (OSTI)

    Singh, Kirandeep; Kaur, Davinder, E-mail: dkaurfph@iitr.ernet.in [Functional Nanomaterials Research Lab, Department of Physics and Centre of Nanotechnology, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand (India); Singh, Sushil Kumar [Functional Materials Division, Solid State Physics Lab (SSPL), DRDO, Lucknow Road, Timarpur, Delhi 110054 (India)

    2014-09-21

    The strain mediated electrical and magnetic properties were investigated in PZT/Ni-Mn-In heterostructure deposited on Si (100) by dc/rf magnetron sputtering. X-ray diffraction pattern revealed that (220) orientation of Ni-Mn-In facilitate the (110) oriented tertragonal phase growth of PZT layer in PZT/Ni-Mn-In heterostructure. A distinctive peak in dielectric constant versus temperature plots around martensitic phase transformation temperature of Ni-Mn-In showed a strain mediated coupling between Ni-Mn-In and PZT layers. The ferroelectric measurement taken at different temperatures exhibits a well saturated and temperature dependent P-E loops with a highest value of P{sub sat}~55 ?C/cm obtained during martensite-austenite transition temperature region of Ni-Mn-In. The stress induced by Ni-Mn-In layer on upper PZT film due to structural transformation from martensite to austenite resulted in temperature modulated Tunability of PZT/Ni-Mn-In heterostructure. A tunability of 42% was achieved at 290 K (structural transition region of Ni-Mn-In) in these heterostructures. I-V measurements taken at different temperatures indicated that ohmic conduction was the main conduction mechanism over a large electric field range in these heterostructures. Magnetic measurement revealed that heterostructure was ferromagnetic at room temperature with a saturation magnetization of ~123 emu/cm. Such multiferroic heterostructures exhibits promising applications in various microelectromechanical systems.

  6. Distinct local electronic structure and magnetism for Mn in amorphous Si and Ge

    E-Print Network [OSTI]

    Zeng, Li

    2010-01-01

    ferromagnetic Mn 5 Ge 3 for spintronic applications. Phys.Wolf, S. A. et al. Spintronics: a spin-based electronicsdopants of interest for spintronic applications, where both

  7. Preparation and electrochemical properties of lamellar MnO{sub 2} for supercapacitors

    SciTech Connect (OSTI)

    Yan, Jun; Wei, Tong; Cheng, Jie; Fan, Zhuangjun; Zhang, Milin

    2010-02-15

    Lamellar birnessite-type MnO{sub 2} materials were prepared by changing the pH of the initial reaction system via hydrothermal synthesis. The interlayer spacing of MnO{sub 2} with a layered structure increased gradually when the initial pH value varied from 12.43 to 2.81, while the MnO{sub 2}, composed of {alpha}-MnO{sub 2} and {gamma}-MnO{sub 2}, had a rod-like structure at pH 0.63. Electrochemical studies indicated that the specific capacitance of birnessite-type MnO{sub 2} was much higher than that of rod-like MnO{sub 2} at high discharge current densities due to the lamellar structure with fast intercalation/deintercalation of protons and high utilization of MnO{sub 2}. The initial specific capacitance of MnO{sub 2} prepared at pH 2.81 was 242.1 F g{sup -1} at 2 mA cm{sup -2} in 2 mol L{sup -1} (NH{sub 4}){sub 2}SO{sub 4} aqueous electrolyte. The capacitance increased by about 8.1% of initial capacitance after 200 cycles at a current density of 100 mA cm{sup -2}.

  8. WI Radiation Protection

    Broader source: Energy.gov [DOE]

    This statute seeks to regulate radioactive materials, to encourage the constructive uses of radiation, and to prohibit and prevent exposure to radiation in amounts which are or may be detrimental...

  9. Training Session: Madison, WI

    Broader source: Energy.gov [DOE]

    This 3.5-hour training provides builders with a comprehensive review of zero net-energy-ready home construction including the business case, detailed specifications, and opportunities to be...

  10. Opti-MN Impact House Presentation | 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: Alternative Fuelsof EnergyApril 2014DepartmentCouncilOffice of theOpen DataHeat &Opti-MN

  11. Oxygen Atom Transfer and Oxidative Water Incorporation in Cuboidal Mn3MOn Complexes Based on Synthetic, Isotopic Labeling,

    E-Print Network [OSTI]

    Goddard III, William A.

    the cluster. 1. INTRODUCTION Artificial photosynthesis schemes generally involve water as the terminal source, with the MnIV 3CaO4 OEC model being unreactive. The oxidative oxide incorporation into the partial cubane, Mn

  12. Disordered electronic and magnetic systems - transition metal (Mn) and rare earth (Gd) doped amorphous group IV semiconductors (C, Si, Ge)

    E-Print Network [OSTI]

    Zeng, Li

    2007-01-01

    various transition or rare-earth metals provide a rich ?eldTransition Metal (Mn) and Rare Earth (Gd) Doped AmorphousTransition Metal (Mn) and Rare Earth (Gd) Doped Amorphous

  13. Magnetic and structural properties of Zn doped MnV{sub 2}O{sub 4}

    SciTech Connect (OSTI)

    Shahi, Prashant; Shukla, K. K.; Singh, Rahul; Chatterjee, Sandip; Das, A.; Ghosh, A. K.; Nigam, A. K.

    2014-04-24

    The magnetization, Neutron diffraction and X-ray diffraction of Zn doped MnV{sub 2}O{sub 4} as a function of temperature have been measured. It has been observed, with increase of Zn the non-linear orientation of Mn spins with the V spins will decrease which effectively decrease the structural transition temperature more rapidly than Curie Temperature.

  14. Photovoltaic effect in multiphase Bi-Mn-O thin J. P. Chakrabartty,1

    E-Print Network [OSTI]

    Photovoltaic effect in multiphase Bi-Mn-O thin films J. P. Chakrabartty,1 R. Nechache,2,4 C and therefore the photovoltaic conversion efficiency. Specifically, a higher Bi/Mn ratio (towards unity separation. 2013 Optical Society of America OCIS codes: (040.5350) Photovoltaic; (160.2260) Ferroelectrics

  15. MN 555 MEMS: Fabrication and Materials Spring 2004 Department of Manufacturing Engineering

    E-Print Network [OSTI]

    Lin, Xi

    MN 555 MEMS: Fabrication and Materials Spring 2004 Instructor Xin Zhang Department of Manufacturing meetings by appointment) 2003-2004 Catalog Data: MN 555 MEMS: Fabrication and Materials This course will explore the world of microelectromechanical devices and systems (MEMS). This requires an awareness

  16. Dietary resveratrol administration increases MnSOD expression and activity in mouse brain

    E-Print Network [OSTI]

    Stuart, Jeffrey A.

    Dietary resveratrol administration increases MnSOD expression and activity in mouse brain Ellen L May 2008 Available online xxxx Keywords: MnSOD Superoxide dismutase Resveratrol Antioxidant enzyme Brain Heart Liver Mitochondria Reactive oxygen species a b s t r a c t trans-Resveratrol (3,40 ,5

  17. Magnetic cluster excitations in the antiferromagnetic phase of a-MnMoO4

    E-Print Network [OSTI]

    Ochsenbein, Stefan T; Chaboussant, Gregory; Sieber, Andreas; Gudel, Hans U; Janssen, Stefan; Furrer, Albert; Attfield, J. Paul

    2003-01-01

    The tetramer-based compound a-MnMoO4 exhibits four prominent peaks in the inelastic neutron scattering (INS) spectrum between 0.5 and 2.0 meV below 10 K. They are assigned to magnetic excitations of the (Mn2+)4 rhombus ...

  18. Electric-Field Modulation of Curie Temperature in (Ga, Mn)As Field-Effect Transistor Structures with Varying Channel Thickness and Mn Compositions

    SciTech Connect (OSTI)

    Nishitani, Y.; Endo, M.; Chiba, D.; Matsukura, F.; Ohno, H.

    2010-01-04

    We have investigated the change of T{sub C} of ferromagnetic semiconductor (Ga, Mn)As by changing hole concentration p. The field effect transistor structure was utilized to change p. The relation T{sub C}propor top{sup 0.2} is obtained for three samples, despite the difference of their Mn composition and thickness, indicating that the relation holds over 2 decades of p.

  19. Scanning tunneling microscopy reveals LiMnAs is a room temperature anti-ferromagnetic semiconductor

    SciTech Connect (OSTI)

    Wijnheijmer, A. P.; Koenraad, P. M.; Marti, X.; Holy, V.; Cukr, M.; Novak, V.; Jungwirth, T.

    2012-03-12

    We performed scanning tunneling microscopy and spectroscopy on a LiMnAs(001) thin film epitaxially grown on an InAs(001) substrate by molecular beam epitaxy. While the in situ cleavage exposed only the InAs(110) non-polar planes, the cleavage continued into the LiMnAs thin layer across several facets. We combined both topography and current mappings to confirm that the facets correspond to LiMnAs. By spectroscopy we show that LiMnAs has a band gap. The band gap evidenced in this study, combined with the known Neel temperature well above room temperature, confirms that LiMnAs is a promising candidate for exploring the concepts of high temperature semiconductor spintronics based on antiferromagnets.

  20. Core-level satellites and outer core-level multiplet splitting in Mn model compounds

    SciTech Connect (OSTI)

    Nelson, A. J. [Lawrence Livermore National Laboratory, University of California, Livermore, California 94550 (United States)] [Lawrence Livermore National Laboratory, University of California, Livermore, California 94550 (United States); Reynolds, John G. [Lawrence Livermore National Laboratory, University of California, Livermore, California 94550 (United States)] [Lawrence Livermore National Laboratory, University of California, Livermore, California 94550 (United States); Roos, Joseph W. [Ethyl Corporation, Richmond, Virginia 23217 (United States)] [Ethyl Corporation, Richmond, Virginia 23217 (United States)

    2000-07-01

    We report a systematic study of the Mn 2p, 3s, and 3p core-level photoemission and satellite structures for Mn model compounds. Charge transfer from the ligand state to the 3d metal state is observed and is distinguished by prominent shake-up satellites. We also observe that the Mn 3s multiplet splitting becomes smaller as the Mn oxidation state increases, and that 3s-3d electron correlation reduces the branching ratio of the {sup 7}S:{sup 5}S states in the Mn 3s spectra. In addition, as the ligand electronegativity decreases, the spin-state purity is lost in the 3s spectra, as evidenced by peak broadening. Our results are best understood in terms of the configuration-interaction model including intrashell electron correlation, charge transfer, and final-state screening. (c) 2000 American Vacuum Society.

  1. Three-Dimensional (3D) Bicontinuous Hierarchically Porous Mn?O? Single Crystals for High Performance Lithium-Ion Batteries

    E-Print Network [OSTI]

    Huang, Shao-Zhuan; Jin, Jun; Cai, Yi; Li, Yu; Deng, Zhao; Zeng, Jun-Yang; Liu, Jing; Wang, Chao; Hasan, Tawfique; Su, Bao-Lian

    2015-10-06

    Bicontinuous hierarchically porous Mn?O? single crystals (BHP-Mn?O?-SCs) with uniform parallelepiped geometry and tunable sizes have been synthesized and used as anode materials for lithium-ion batteries (LIBs). The monodispersed BHP-Mn?O?-SCs...

  2. Start | Author Index 742-3 Rates and Mechanisms of Arsenite Oxidation by Nano-Mn(IV) Oxide Mineral Phases.

    E-Print Network [OSTI]

    Sparks, Donald L.

    Start | Author Index 742-3 Rates and Mechanisms of Arsenite Oxidation by Nano-Mn(IV) Oxide Mineral is thought to generally occur through either biologically or mineral-surface mediated Mn(II) oxidation. These two oxidation pathways result in the formation of nanometer-size Mn(IV) minerals. Compared

  3. -i&k'il (uI//X -8^O^O --o ~u^ 1MASTER

    E-Print Network [OSTI]

    Oak Ridge National Laboratory

    conditioners. Also, recent increases in the real prices of energy augment these savings. For this country, September 28-October 1, 1981, Los Angeles, California. #12;-2- resources needed for the residential-i&k'il (uI//X - 8^O^O --o ~u^ 1MASTER GASrHEAT-PUMP DEVELOPMENT F. A. Creswick a Energy Division

  4. Premio Perini Navi S.p.A. IL COMITATO LEONARDO ITALIAN QUALIT COMMITTE HA

    E-Print Network [OSTI]

    Segatti, Antonio

    1 Premio Perini Navi S.p.A. IL COMITATO LEONARDO ITALIAN QUALIT COMMITTE HA DELIBERATO DI DELEGATO DI PERINI NAVI SPA. - ANNO 2011 - "Progetto di un natante ad uso tender per un'imbarcazione a vela dalla direzione della Perini Navi S.p.A. FINALIT: Premiare i due migliori progetti relativi ad un

  5. IL NUOVO CIMENTO Vol. ?, N. ? ? Atomic theory in cesium, implications for searches for physics

    E-Print Network [OSTI]

    Safronova, Marianna

    IL NUOVO CIMENTO Vol. ?, N. ? ? Atomic theory in cesium, implications for searches for physics on weak nucleon-nucleon coupling obtained from the cesium anapole moment and those obtained from other by the parity selection rule, such as the 6s - 7s transition in cesium. Several different effects contributing

  6. Understanding Deep Web Search Interfaces: A Survey Ritu Khare Yuan An Il-Yeol Song

    E-Print Network [OSTI]

    Song, Il-Yeol

    Understanding Deep Web Search Interfaces: A Survey Ritu Khare Yuan An Il-Yeol Song The i presents a survey on the major approaches to search interface understanding. The Deep Web consists of data of Deep Web. Automatic access to these data requires an automatic understanding of search interfaces

  7. Prot. n. 909/2014 SELEZIONE PER IL CONFERIMENTO DI N. 1 ASSEGNO PER LO

    E-Print Network [OSTI]

    categoria B Tipologia II Analisi di risposta sismica locale in aree edificate, analisi dell'interazione dell'edificato con il sottosuolo; valutazione degli effetti del non sincronismo dell'azione sismica viene chiesta la cultura in campo di risposta sismica locale finalizzata alle interazioni con le

  8. MILLING-GRINDING-DRILLING AND SLOTTING ATTACHMENT (VERSA-M IL)

    E-Print Network [OSTI]

    Gellman, Andrew J.

    TC 9-524 Chapter 9 MILLING-GRINDING-DRILLING AND SLOTTING ATTACHMENT (VERSA-M IL) GENERAL DESCRIPTION The milling-grinding-drilling and slotting attachment is commonly referred to as a Versa-purpose machines. With the different attachments that are available with the unit, drilling, shaping, milling

  9. 1. Risolvete il seguente sistema lineare utilizzando l'algoritmo di Gauss con pivoting per colonne

    E-Print Network [OSTI]

    Guerrini, Carla

    Esercizi 1. Risolvete il seguente sistema lineare utilizzando l'algoritmo di Gauss con pivoting per colonne: 2x1 + x2 + 2x3 = 5 2x1 + x2 - 3x3 = 0 3x1 - x2 + 7x3 = 9 2. Utilizzate l'algoritmo di Gauss senza

  10. Bando n. 01/2012 AVVISO PUBBLICO DI SELEZIONE PER IL CONFERIMENTO DI UN INCARICO DI

    E-Print Network [OSTI]

    Di Pillo, Gianni

    FISIOLOGIA E FARMACOLOGIA "VITTORIO ERSPAMER" VISTO - Visto il Regolamento per l'affidamento di incarichi di fronte alle esigenze rappresentate dal Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer svolgimento dell'attivit di cui all'art. 1 del presente avviso a favore del Dipartimento di Fisiologia e

  11. (Bando collab. 2014 -04) AVVISO PUBBLICO DI SELEZIONE PER IL CONFERIMENTO DI UN INCARICO DI

    E-Print Network [OSTI]

    Di Pillo, Gianni

    FISIOLOGIA E FARMACOLOGIA "VITTORIO ERSPAMER" VISTO - Visto il Regolamento per l'affidamento di incarichi di disponibilit, n competenze adeguate per fare fronte alle esigenze rappresentate dal Dipartimento di Fisiologia presente avviso a favore del Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" della "Sapienza

  12. Bando n. 04_2012 AVVISO PUBBLICO DI SELEZIONE PER IL CONFERIMENTO DI UN INCARICO DI

    E-Print Network [OSTI]

    Di Pillo, Gianni

    FISIOLOGIA E FARMACOLOGIA "VITTORIO ERSPAMER" VISTO - Visto il Regolamento per l'affidamento di incarichi di competenze adeguate per fare fronte alle esigenze rappresentate dal Dipartimento di Fisiologia e Farmacologia di Fisiologia e Farmacologia "Vittorio Erspamer" della "Sapienza" Universit di Roma. Articolo 1 La

  13. NOMINA COMMISSIONE GIUDICATRICE PER IL CONFERIMENTO DI INCARICO DI PROFESSORE STRAORDINARIO CON RAPPORTO DI LAVORO

    E-Print Network [OSTI]

    Di Pillo, Gianni

    RAPPORTO DI LAVORO A TEMPO DETERMINATO Il Direttore del Dipartimento di Fisiologia e Farmacologia "Vittorio Dipartimento di Fisiologia e Farmacologia; VISTA la delibera del Consiglio di Dipartimento di Fisiologia e Fisiologia e Farmacologia di Sapienza Universit di Roma, cos composta: #12;membri effettivi: prof. Paolo

  14. (Bando collab. 2014 -01) AVVISO PUBBLICO DI SELEZIONE PER IL CONFERIMENTO DI UN INCARICO DI

    E-Print Network [OSTI]

    Di Pillo, Gianni

    DIPARTIMENTO DI FISIOLOGIA E FARMACOLOGIA "VITTORIO ERSPAMER" VISTO - Visto il Regolamento per l'affidamento di esigenze rappresentate dal Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer"; - Ravvisata all'art. 1 del presente avviso a favore del Dipartimento di Fisiologia e Farmacologia "Vittorio

  15. BANDO PER IL RECLUTAMENTO DI UN RICERCATORE CON RAPPORTO DI LAVORO A TEMPO DETERMINATO TIPOLOGIA A

    E-Print Network [OSTI]

    Di Pillo, Gianni

    di Fisiologia e Farmacologia "Vittorio Erspamer" Visti i DD.MM. 4.10.2000 e 9.1.2001 concernenti la a disposizione del Dipartimento; Viste le delibere del Consiglio del Dipartimento di Fisiologia e Farmacologia ed esami - n 75 del 26 settembre 2014; Considerato che per il Dipartimento di Fisiologia e

  16. Bando n. 02_2013 AVVISO PUBBLICO DI SELEZIONE PER IL CONFERIMENTO DI UN INCARICO DI

    E-Print Network [OSTI]

    Di Pillo, Gianni

    FISIOLOGIA E FARMACOLOGIA "VITTORIO ERSPAMER" VISTO - Visto il Regolamento per l'affidamento di incarichi di alle esigenze rappresentate dal Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer Fisiologia e Farmacologia "Vittorio Erspamer" della "Sapienza" Universit di Roma. Articolo 1 La presente

  17. BANDO PER IL RECLUTAMENTO DI UN RICERCATORE CON RAPPORTO DI LAVORO A TEMPO DETERMINATO TIPOLOGIA A

    E-Print Network [OSTI]

    Di Pillo, Gianni

    A Bando RTD n. 02/2014 Il Direttore del Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer Fisiologia e Farmacologia "Vittorio Erspamer" di n. 1 posto di ricercatore con rapporto di lavoro a tempo economica della quota di competenza a carico del Dipartimento di Fisiologia e Farmacologia "Vittorio

  18. (Bando collab. 2014 -03) AVVISO PUBBLICO DI SELEZIONE PER IL CONFERIMENTO DI UN INCARICO DI

    E-Print Network [OSTI]

    Di Pillo, Gianni

    FISIOLOGIA E FARMACOLOGIA "VITTORIO ERSPAMER" VISTO - Visto il Regolamento per l'affidamento di incarichi di alle esigenze rappresentate dal Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer'attivit di cui all'art. 1 del presente avviso a favore del Dipartimento di Fisiologia e Farmacologia

  19. (Bando collab. 2014 -02) AVVISO PUBBLICO DI SELEZIONE PER IL CONFERIMENTO DI UN INCARICO DI

    E-Print Network [OSTI]

    Di Pillo, Gianni

    FISIOLOGIA E FARMACOLOGIA "VITTORIO ERSPAMER" VISTO - Visto il Regolamento per l'affidamento di incarichi di esigenze rappresentate dal Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer"; - Ravvisata presente avviso a favore del Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" della "Sapienza

  20. Bando n. 02_2012 AVVISO PUBBLICO DI SELEZIONE PER IL CONFERIMENTO DI UN INCARICO DI

    E-Print Network [OSTI]

    Di Pillo, Gianni

    FISIOLOGIA E FARMACOLOGIA "VITTORIO ERSPAMER" VISTO - Visto il Regolamento per l'affidamento di incarichi di adeguate per fare fronte alle esigenze rappresentate dal Dipartimento di Fisiologia e Farmacologia Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" della "Sapienza" Universit di Roma. Articolo 1

  1. BANDO PER IL RECLUTAMENTO DI UN RICERCATORE CON RAPPORTO DI LAVORO A TEMPO DETERMINATO TIPOLOGIA A

    E-Print Network [OSTI]

    Di Pillo, Gianni

    Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" Visti i DD.MM. 4.10.2000 e 9.1.2001 concernenti" a disposizione del Dipartimento; Viste le delibere del Consiglio del Dipartimento di Fisiologia e Farmacologia del 6 giugno 2014; Considerato che per il Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer

  2. Industry MeetIng for sustaInabIlIty Native Forests

    E-Print Network [OSTI]

    NATIONAL CONFEDERATION OF INDUSTRY BRAZIL Robson Braga de Andrade President EDUCATION AND TECHNOLOGY: CNi, 2012. 54 p.: il (rio+20 sectorial fascicle) 1.sustainability 2. United Nations Conference) .................................................... 24 Figure 7. leading Exporter states of sawn Hardwoods in brazil (2011) ............... 24 Figure 8

  3. Differential regulation of RANTES and IL-8 expression in lung adenocarcinoma cells

    E-Print Network [OSTI]

    Boyer, Edmond

    1 Differential regulation of RANTES and IL-8 expression in lung adenocarcinoma cells Corinne expression in lung adenocarcinoma cells HALauthormanuscriptinserm-00143972,version1 HAL author manuscript Lung Cancer 56, 2 (2007) 167-74 #12;2 Summary In lung adenocarcinoma, expression of Regulated upon

  4. Il Ministro dellIstruzione, dell''Universit e della Allegato A (v. art. 4)

    E-Print Network [OSTI]

    Di Pillo, Gianni

    assicurano alle Universit livelli di qualit, efficienza ed efficacia dei corsi di studio, si fa riferimento agli indicatori appresso indicati. Indicatori di efficienza: a. l'efficienza nell'utilizzo del acquisiti per studente; b. l'efficienza in termini di numero di studenti iscritti e frequentanti il corso di

  5. Start S Morgan St End 1933 W Polk St, Chicago, IL 60612

    E-Print Network [OSTI]

    Spirtes, Peter

    Start S Morgan St End 1933 W Polk St, Chicago, IL 60612 When 10/5/11 after 9:00pm Duration 17 mins total Loading... 2011 Google - Map data 2011 Google, Sanborn - S Morgan St to 1933 W Polk St, Chicago mins Harrison & Morgan Bus - 7 - Harrison towards Central 9:07pm - 9:14pm (7 mins, 10 stops) Polk

  6. 21 aprile 2009 Il piccolo AGILE cattura i raggi gamma dalla super-stella

    E-Print Network [OSTI]

    ». Fenomeni che AGILE è riuscito a osservare nella banda di energia intorno a 100 MeV grazie allo strumento realizzato in collaborazione con l'Istituto Nazionale di Fisica Nucleare. AGILE, il cui nome è l'acronimo di), progettato dall'INAF (Istituto Nazionale di Astrofisica), dall'INFN (Istituto Nazionale di Fisica Nucleare

  7. Influence of Mn and Ni on the microstructure and toughness of C-Mn-Ni weld metals

    SciTech Connect (OSTI)

    Zhang, Z.; Farrar, R.A. [Univ. of Southampton (United Kingdom). Dept. of Mechanical Engineering

    1997-05-01

    A systematic investigation has been carried out to study the microstructure and toughness of C-Mn-Ni low-alloy shielded metal arc (SMA) weld metals. The manganese and nickel concentrations were progressively changed to determine their influence on weld microstructure and mechanical properties as well as to identify their interactions. The results obtained showed that manganese and nickel have considerable effect on the weld metal microstructure, and both Mn and Ni affect the microstructure in a similar way, i.e., promoting acicular ferrite at the expense of proeutectoid ferrite (grain boundary ferrite and ferrite sideplates). The results in the top bead also showed that there is an optimum composition range that produces an optimum balance of weld metal microstructures. For optimum toughness, a combination of 0.6--1.4% manganese and 1.0--3.7% nickel is suggested. Additions beyond this limit promotes the formation of martensite and other microstructural features, which may be detrimental to weld metal toughness.

  8. Matematica con Esercitazioni 22. 11. 2014 1. Risolvere il seguente sistema lineare con l'algoritmo di Gauss-Jordan

    E-Print Network [OSTI]

    Achilles, Rdiger

    Matematica con Esercitazioni 22. 11. 2014 1. Risolvere il seguente sistema lineare con l'algoritmo l'eliminazione di Gauss e considerare il sistema equivalente triangolare. 4. Si usi l'algoritmo di Suggerimento: Si usi l'algoritmo di Gauss per ridurre le matrici a scala per righe. 6. (Bramanti

  9. Algorithms II 89-322 Instructor: Prof. Amihood Amir 03-531-8770 amir@cs.biu.ac.il

    E-Print Network [OSTI]

    Amir, Amihood

    " Algorithms II 89-322 Instructor: Prof. Amihood Amir 03-531-8770 amir@cs.biu.ac.il Webpage: http://u.cs.biu.ac.il/~amir/AlgII/alg2.html Office hours: by appointment Text: Any advanced algorithms book. Example: Cormen, Leiserson, Rivest and Stein (2nd edition). Class notes. Prerequisites: Algorithms I, Complexity. Transparencies

  10. BANDO N. 01-2010 PER IL RECLUTAMENTO DI UN RICERCATORE CON RAPPORTO DI LAVORO A TEMPO DETERMINATO

    E-Print Network [OSTI]

    Di Pillo, Gianni

    Il Direttore del Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" Visto il Regolamento Fisiologia e Farmacologia "Vittorio Erspamer" e la Fondazione "Enrico ed Enrica Sovena", con sede in Roma costituenti chimici"; Vista la Delibera del Consiglio del Dipartimento di Fisiologia e Farmacologia "Vittorio

  11. Du dmon blond Jesus Price, les rfrences religieuses abondent lorsqu'il est ques-tion du Canadien de Montral.

    E-Print Network [OSTI]

    Charette, Andr

    Du dmon blond Jesus Price, les rfrences religieuses abondent lorsqu'il est ques- tion du Canadien de Montral. Du culte de la sainte Flanelle celui de Jesus Price en passant par les fantmes. Jsus Price est parfois le sauveur de l'quipe, alors qu' d'autres moments il vit un cal- vaire et

  12. Investigations of segregation phenomena in highly strained Mn-doped Ge wetting layers and Ge quantum dots embedded in silicon

    SciTech Connect (OSTI)

    Prestat, E., E-mail: eric.prestat@gmail.com; Porret, C.; Favre-Nicolin, V.; Tainoff, D.; Boukhari, M.; Bayle-Guillemaud, P.; Jamet, M.; Barski, A., E-mail: andre.barski@cea.com [INAC, SP2M, CEA and Universit Joseph Fourier, 17 rue des Martyrs, 38054 Grenoble (France)

    2014-03-10

    In this Letter, we investigate manganese diffusion and the formation of Mn precipitates in highly strained, few monolayer thick, Mn-doped Ge wetting layers and nanometric size Ge quantum dot heterostructures embedded in silicon. We show that in this Ge(Mn)/Si system manganese always precipitates and that the size and the position of Mn clusters (precipitates) depend on the growth temperature. At high growth temperature, manganese strongly diffuses from germanium to silicon, whereas decreasing the growth temperature reduces the manganese diffusion. In the germanium quantum dots layers, Mn precipitates are detected, not only in partially relaxed quantum dots but also in fully strained germanium wetting layers between the dots.

  13. Ferromagnetic (Ga,Mn)As nanostructures for spintronic applications

    SciTech Connect (OSTI)

    Wosinski, Tadeusz; Andrearczyk, Tomasz; Figielski, Tadeusz; Makosa, Andrzej; Wrobel, Jerzy; Sadowski, Janusz

    2013-12-04

    Magneto-resistive, cross-like nanostructures have been designed and fabricated by electron-beam lithography patterning and chemical etching from thin epitaxial layers of the ferromagnetic semiconductor (Ga,Mn)As. The nanostructures, composed of two perpendicular nanostripes crossing in the middle of their length, represent four-terminal devices, in which an electric current can be driven through any of the two nanostripes. In these devices, a novel magneto-resistive memory effect, related to a rearrangement of magnetic domain walls in the central part of the device, has been demonstrated. It consists in that the zero-field resistance of a nanostripe depends on the direction of previously applied magnetic field. The nanostructures can thus work as two-state devices providing basic elements of nonvolatile memory cells.

  14. Impedance analysis of MnCoCuO NTC ceramic

    SciTech Connect (OSTI)

    Song, S.G. . E-mail: song-ph0@wpmail.paisley.ac.uk; Ling, Z.; Placido, F.

    2005-07-12

    Impedance spectroscopy is often used to analyse the electrical properties of ceramic materials having high-resistive grain boundaries, such as ZnO and SrTiO{sub 3}. Fewer attempts have been made at using this technique for the analysis of inhomogeneous electronic ceramics consisting of grains with differing composition, such as those occurring in negative temperature coefficient (NTC) thermistors. In this study, we have attempted to adopt ac impedance spectroscopy together with other techniques to analyse an NTC thermistor ceramic material. An Mn, Co and Cu multielements transition metal oxide (MnCoCuO) ceramic was prepared by using homogeneous precipitation employing oxalic acid. This material displayed a typical NTC effect, showing an electrical resistance decrease with temperature when dc electrical measurement was performed. The ac impedance spectroscopy analysis showed that there were two peaks in impedance and conductance versus frequency plot. By using an alternative representation of impedance spectra Z'/f versus Z', three distinct relaxation frequency ranges were identified. They are believed to originate, respectively, from the electrode, phase 1 (rich-Cu phase) and phase 2 (poor-Cu phase) grains existing in this ceramic. SEM observation and EDX analysis clearly showed existence of two distinct phase grains. The resistance values were derived from phases 1 and 2 grains based on ac impedance data. The sum of the resistance values was in good agreement with that from dc measurement in the temperature range of 30-95 deg. C. The material constant, B, for the two phases was also calculated, giving 3100 and 3600 K for phases 1 and 2, respectively.

  15. Quantum Anomalous Hall Effect in Hg_1-yMn_yTe Quantum Wells

    SciTech Connect (OSTI)

    Liu, Chao-Xing; /Tsinghua U., Beijing /Stanford U., Phys. Dept.; Qi, Xiao-Liang; /Stanford U., Phys. Dept.; Dai, Xi; Fang, Zhong; /Beijing, Inst. Phys.; Zhang, Shou-Cheng; /Stanford U., Phys. Dept.

    2010-03-19

    The quantum Hall effect is usually observed when the two-dimensional electron gas is subjected to an external magnetic field, so that their quantum states form Landau levels. In this work we predict that a new phenomenon, the quantum anomalous Hall effect, can be realized in Hg{sub 1-y}Mn{sub y}Te quantum wells, without the external magnetic field and the associated Landau levels. This effect arises purely from the spin polarization of the Mn atoms, and the quantized Hall conductance is predicted for a range of quantum well thickness and the concentration of the Mn atoms. This effect enables dissipationless charge current in spintronics devices.

  16. Recent progress of magnetocaloric effect and magnetic refrigerant materials of Mn compounds (invited)

    SciTech Connect (OSTI)

    Wada, H. Takahara, T.; Katagiri, K.; Ohnishi, T.; Soejima, K.; Yamashita, K.

    2015-05-07

    Magnetocaloric and related properties of Ru and Ni substituted (MnFe){sub 2}(PSi) are presented. It is found that Ru and Ni are effective doping elements to reduce the thermal hysteresis of (MnFe){sub 2}(PSi). The origin of the thermal hysteresis is discussed on the basis of a thermodynamic model. It is shown that the elastic energy is responsible for the thermal hysteresis. We also show recent developments of the production process of Mn compounds in an industrial scale.

  17. First-principles study of spin-transfer torque in Co{sub 2}MnSi/Al/Co{sub 2}MnSi spin-valve

    SciTech Connect (OSTI)

    Tang, Ling, E-mail: lingtang@zjut.edu.cn; Yang, Zejin, E-mail: zejinyang@zjut.edu.cn [Department of Applied Physics, Zhejiang University of Technology, Hangzhou 310023 (China)

    2013-11-21

    The spin-transfer torque (STT) in Co{sub 2}MnSi(CMS)/Al/Co{sub 2}MnSi spin-valve system with and without interfacial disorder is studied by a first-principles noncollinear wave-function-matching method. It is shown that in the case of clean interface the angular dependence of STT for CoCo/Al (the asymmetry parameter ??4.5) is more skewed than that for MnSi/Al (??2.9), which suggests the clean CoCo/Al architecture is much more efficient for the application on radio frequency oscillation. We also find that even with interfacial disorder the spin-valve of half-metallic CMS still has a relatively large parameter ? compared to that of conventional ferromagnet. In addition, for clean interface the in-plane torkance of MnSi/Al is about twice as large as that of CoCo/Al. However, as long as the degree of interfacial disorder is sufficiently large, the CoCo/Al and MnSi/Al will show approximately the same magnitude of in-plane torkance. Furthermore, our results demonstrate that CMS/Al/CMS system has very high efficiency of STT to switch the magnetic layer of spin-valve.

  18. Selezione pubblica per il conferimento di n. 1 assegno per collaborazione ad attivit di ricerca Bando n. 05/2011-Approvazione atti

    E-Print Network [OSTI]

    Di Pillo, Gianni

    .04.2011 e del 19.04.2011; VISTA la delibera del Consiglio del Dipartimento di Fisiologia e Farmacologia il bando pubblicato il 29 luglio 2011; VISTA la delibera del Consiglio di Dipartimento di Fisiologia dalla Commissione giudicatrice e conservati presso il Dipartimento di Fisiologia e Farmacologia DISPONE

  19. Bando n. 01/2012 del 24 luglio 2012 per il conferimento di incarico di professore straordinario con rapporto di lavoro a tempo determinato

    E-Print Network [OSTI]

    Di Pillo, Gianni

    rapporto di lavoro a tempo determinato APPROVAZIONE ATTI Il Direttore del Dipartimento di Fisiologia e convenzione, per il settore S/D BIO/14, settore concorsuale 05/G1 presso il Dipartimento di Fisiologia e Farmacologia; Vista la delibera del Consiglio di Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer

  20. Drill press "*il:J",,",,",tdont cone wrth bit stdAe? t(I

    E-Print Network [OSTI]

    Oh, Paul

    Drill press "*il:J",,",,",tdont cone wrth bit stdAe? t(I N'trkeyour own Ptrotng racK fron scrapwoodandPutdrill bits, sandingdrums' hole sawsand countersmKs right at your nnger- dps.Hete'show: drilling8 the desiSn of this laluable drill Press N'* II "MeetmY new butler '\\-clffFs rHE F^M|LY(^NDYMAN MAY

  1. Mn solid solutions in self-assembled Ge/Si (001) quantum dot heterostructures

    SciTech Connect (OSTI)

    Kassim, J.; Nolph, C.; Reinke, P.; Floro, J. [Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904 (United States); Jamet, M. [Institut Nanosciences et Cryogenie/SP2M, CEA-UJF, F-38054 Grenoble (France)

    2012-12-10

    Heteroepitaxial Ge{sub 0.98}Mn{sub 0.02} quantum dots (QDs) on Si (001) were grown by molecular beam epitaxy. The standard Ge wetting layer-hut-dome-superdome sequence was observed, with no indicators of second phase formation in the surface morphology. We show that Mn forms a dilute solid solution in the Ge quantum dot layer, and a significant fraction of the Mn partitions into a sparse array of buried, Mn-enriched silicide precipitates directly underneath a fraction of the Ge superdomes. The magnetic response from the ultra-thin film indicates the absence of robust room temperature ferromagnetism, perhaps due to anomalous intermixing of Si into the Ge quantum dots.

  2. Prospects for high temperature ferromagnetism in (Ga,Mn)As semiconductors

    E-Print Network [OSTI]

    Jungwirth, T.; Wang, KY; Masek, J.; Edmonds, KW; Konig, J.; Sinova, Jairo; Polini, M.; Goncharuk, NA; MacDonald, AH; Sawicki, M.; Rushforth, AW; Campion, RP; Zhao, LX; Foxon, CT; Gallagher, BL.

    2005-01-01

    We report on a comprehensive combined experimental and theoretical study of Curie temperature trends in (Ga,Mn)As ferromagnetic semiconductors. Broad agreement between theoretical expectations and measured data allows us to conclude that T-c in high...

  3. Effect of Mn substitution on the transport properties of co-sputtered...

    Office of Scientific and Technical Information (OSTI)

    exhibit a high spin polarization with a high Curie temperature to be applied in spintronic devices, and in order to further study the effect of Mn contents on the physical...

  4. Understanding and development of combined acoustic and magnetic actuation of Ni?MnGa single crystals

    E-Print Network [OSTI]

    Techapiesancharoenkij, Ratchatee, 1979-

    2007-01-01

    Ni-Mn-Ga based ferromagnetic shape memory alloys (FSMAs) have emerged as a promising new class of active materials capable of producing a large (several %) magnetic-field-induced strain (MFIS). FSMAs still have several ...

  5. Formation of nano-crystalline todorokite from biogenic Mn Xiong Han Feng a,1

    E-Print Network [OSTI]

    Sparks, Donald L.

    Formation of nano-crystalline todorokite from biogenic Mn oxides Xiong Han Feng a,1 , Mengqiang Zhu oxides in the environment. Additionally this method may be a viable biosynthesis route for porous, nano-crystalline

  6. Irradiated Esophageal Cells are Protected from Radiation-Induced Recombination by MnSOD Gene Therapy

    E-Print Network [OSTI]

    Niu, Yunyun

    Radiation-induced DNA damage is a precursor to mutagenesis and cytotoxicity. During radiotherapy, exposure of healthy tissues can lead to severe side effects. We explored the potential of mitochondrial SOD (MnSOD) gene ...

  7. Growth of GaMnAs under near-stoichiometric conditions

    SciTech Connect (OSTI)

    Avrutin, V.; Humienik, D.; Frank, S.; Koeder, A.; Schoch, W.; Limmer, W.; Sauer, R.; Waag, A. [Abteilung Halbleiterphysik, Universitaet Ulm, D-89069 Ulm (Germany); Institut fuer Halbleitertechnik, Technische Universitaet (TU) Braunschweig, Hans-Sommer-Strasse 66, D38103 Braunschweig (Germany)

    2005-07-15

    We studied the effect of the V/III flux ratio and substrate temperature on magnetotransport properties and lattice parameters of Ga{sub 0.96}Mn{sub 0.04}As grown by molecular-beam epitaxy. For all the substrate temperatures, the conductivities and Curie temperatures of the layers were found to increase as the V/III flux ratio approaches 1. A Curie temperature as high as 95 K was achieved for the Ga{sub 0.96}Mn{sub 0.04}As samples grown at 240 deg. C and a V/III ratio of about 1.5. The lattice parameter of Ga{sub 0.96}Mn{sub 0.04}As increased with decreasing V/III ratio and/or increasing growth temperature. Possible reasons for the effect of the V/III ratio on the magnetotransport properties and lattice parameter of GaMnAs are discussed.

  8. Dispersive magnetic excitations in the S=1 antiferromagnet Ba3Mn2O8

    SciTech Connect (OSTI)

    Stone, Matthew B [ORNL; Lumsden, Mark D [ORNL; Qiu, Y. [National Institute of Standards and Technology (NIST); Samulon, Eric C [Stanford University; Batista, C. D. [Los Alamos National Laboratory (LANL); Fisher, Ian R [Stanford University

    2008-01-01

    We present powder inelastic neutron scattering measurements of the $S=1$ dimerized antiferromagnet Ba$_3$Mn$_2$O$_8$. The $T=1.4$~K~magnetic spectrum exhibits a spin-gap of $\\Delta = 0.9$~meV and a dispersive spectrum with a bandwidth of approximately $1.74$~meV. Comparison to coupled dimer models describe the dispersion and scattering intensity accurately and determine the exchange constants in Ba$_3$Mn$_2$O$_8$. Interdimer exchange between triangular lattice dimer bilayers in Ba$_3$Mn$_2$O$_8$ is two orders of magnitude weaker than intradimer exchange. Ba$_3$Mn$_2$O$_8$ is thus a quasi-two-dimensional frustrated bilayer triangular lattice of $S=1$ dimers. The wave vector dependent scattering intensity confirms the proposed $S=1$ dimer bond. Temperature dependent measurements of the magnetic excitations indicate the presence of both singlet-triplet and thermally activated triplet-quintet excitations.

  9. Ferromagnetic transition temperature enhancement in (Ga,Mn)As semiconductors by carbon codoping

    E-Print Network [OSTI]

    Jungwirth, T.; Masek, J.; Sinova, Jairo; MacDonald, AH.

    2003-01-01

    We present a theoretical study of (Ga,Mn)(As,C) diluted magnetic semiconductors with high C acceptor density that combines insights from phenomenological model and microscopic approaches. A tight-binding coherent-potential approximation is used...

  10. Decay of neutron-rich Mn nuclides and deformation of heavy Fe isotopes

    E-Print Network [OSTI]

    M. Hannawald; T. Kautzsch; A. Woehr; W. B. Walters; K. -L. Kratz; V. N. Fedoseyev; V. L. Mishin; W. Boehmer; B. Pfeiffer; V. Sebastian; Y. Jading; U. Koester; J. Lettry; H. L. Ravn; the ISOLDE Collaboration

    1998-12-21

    The use of chemically selective laser ionization combined with beta-delayed neutron counting at CERN/ISOLDE has permitted identification and half-life measurements for 623-ms Mn-61 up through 14-ms Mn-69. The measured half-lives are found to be significantly longer near N=40 than the values calculated with a QRPA shell model using ground-state deformations from the FRDM and ETFSI models. Gamma-ray singles and coincidence spectroscopy has been performed for Mn-64 and Mn-66 decays to levels of Fe-64 and Fe-66, revealing a significant drop in the energy of the first 2+ state in these nuclides that suggests an unanticipated increase in collectivity near N=40.

  11. Quantum Chemical Study of Arsenic (III, V) Adsorption on Mn-Oxides

    E-Print Network [OSTI]

    Sparks, Donald L.

    sites under simulated acidic pH conditions. Therefore, we propose that As(V) adsorption inhibits As(III) oxidation by blocking adsorption sites. Under simulated acidic pH conditions, Mn(IV) sites exhibited

  12. Combining sedimentological, trace metal (Mn, Mo) and molecular evidence for reconstructing past water-column

    E-Print Network [OSTI]

    Gilli, Adrian

    Combining sedimentological, trace metal (Mn, Mo) and molecular evidence for reconstructing past online 22 June 2013 Abstract Here, we present sedimentological, trace metal, and molecular evidence underscores the value of combining sedimentological, geochemical, and microbiological approaches

  13. Magnetism of NiMn2O4-Fe3O4 spinel interfaces

    E-Print Network [OSTI]

    Nelson-Cheeseman, B. B.

    2007-01-01

    2 O 4 Fe 3 O 4 spinel interfaces B. B. Nelson-Cheeseman,isostructural spinel-spinel interface of NiMn 2 O 4 (NMO)Feis preserved, both bulk and interface sensitive measurements

  14. BANDO N. D.D. 118/2010 PER IL RECLUTAMENTO DI UN RICERCATORE CON RAPPORTO DI LAVORO A TEMPO DETERMINATO CO FINANZIATO DALLA REGIONE LAZIO PER IL SETTORE S/D

    E-Print Network [OSTI]

    Di Pillo, Gianni

    caratterizzazione dei materiali per l'energia e l'ambiente. I suddetti requisiti devono essere posseduti alla data conversione di energia. Il ricercatore dovr possedere competenze nelle procedure di sintesi e

  15. Hydrothermal synthesis of Mn vanadate nanosheets and visible-light photocatalytic performance for the degradation of methyl blue

    SciTech Connect (OSTI)

    Pei, L.Z. Xie, Y.K.; Pei, Y.Q.; Jiang, Y.X.; Yu, H.Y.; Cai, Z.Y.

    2013-07-15

    Graphical abstract: - Highlights: Mn vanadate nanosheets have been synthesized by simple hydrothermal process. The formation of Mn vanadate nanosheets can be controlled by growth conditions. Mn vanadate nanosheets exhibit good photocatalytic activities for methyl blue. - Abstract: Mn vanadate nanosheets have been synthesized via a facile hydrothermal route using ammonium metavanadate and Mn acetate as the raw materials, polyvinyl pyrrolidone (PVP) as the surfactant. X-ray diffraction (XRD) shows that the Mn vanadate nanosheets are composed of monoclinic MnV{sub 2}O{sub 6} phase. Scanning electron microscopy (SEM) observation indicates that the nanosheets have the average thickness of about 50 nm, length of 210 ?m and width of 800 nm to 2 ?m. The growth process of the Mn vanadate nanosheets has also been discussed based on the analysis of the roles of the growth conditions on the formation of the Mn vanadate nanosheets. The nanosheets show good photocatalytic activities for the degradation of methylene blue (MB) under visible light irradiation. About 72.96% MB can be degraded after visible light irradiation for 1 h over 10 mg Mn vanadate nanosheets in 10 mL MB solution with the concentration of 10 mg L{sup ?1}.

  16. Magnetic Order and Ferroelectricity in RMnO3 Multiferroic Manganites: Coupline Between R- and Mn-spins

    SciTech Connect (OSTI)

    Aliouane, N.; Prokhnenko, O; Feyerherm, R; Mostovoy, M; Strempfer, J; Habicht, K; Rule, K; Dudzik, E; Wolter, A; et. al.

    2008-01-01

    Combining polarized and unpolarized neutron scattering techniques with x-ray resonant magnetic scattering we have studied the coupling between the Mn- and R-spin-ordering in the multiferroic RMnO3, R = Tb and Dy. Polarized neutron diffraction reveals the moment orientation associated with the various modes describing the complex magnetic ordering observed in TbMnO3, while neutron diffraction in high magnetic fields allows the identification of the origin (Mn versus Tb) of the various modes. In this way we identify significant Cx and Fz contributions from Tb arising from the coupling of Tb moments to the Mn cycloidal ordering. The x-ray studies give further insight into this coupling. In the ferroelectric phase, both TbMnO3 and DyMnO3 show an induced ordering of the R-ion with a propagation vector clamped to the Mn ordering. While in TbMnO3 this clamping leads to a ground state in which the two propagation vectors tTb and tMn obey the relation 3tTb-tMn = 1, in DyMnO3 the ferroelectric polarization is effectively enhanced. The theoretical analysis of these effects not only explains the observed behavior for R = Tb and Dy but can also be applied to understand the Mn-R interaction in the related compounds with R = Gd and Ho. Finally we show both experimentally and theoretically how the Mn-R coupling can enhance the ferroelectric polarization in this manganite's multiferroics.

  17. Magnetic properties and loss separation in iron-silicone-MnZn ferrite soft magnetic composites

    SciTech Connect (OSTI)

    Wu, Shen; Sun, Aizhi; Xu, Wenhuan; Zou, Chao; Yang, Jun; Dong, Juan [School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing (China)

    2013-12-16

    This paper investigates the magnetic and structural properties of iron-based soft magnetic composites coated with silicone-MnZn ferrite hybrid. The organic silicone resin was added to improve the flexibility of the insulated iron powder and causes better adhesion between particles to increase the mechanical properties. Scanning electron microscopy and distribution maps show that the iron particle surface is covered with a thin layer of silicone-MnZn ferrite. Silicone-MnZn ferrite coated samples have higher permeability when compared with the non-magnetic silicone resin coated compacts. The real part of permeability increases by 34.18% when compared with the silicone resin coated samples at 20 kHz. In this work, a formula for calculating the total loss component by loss separation method is presented and finally the different parts of total losses are calculated. The results show that the eddy current loss coefficient is close to each other for the silicone-MnZn ferrite, silicone resin and MnZn ferrite coated samples (0.0078MnZn ferrite coated sample (k{sub 2} =1.4058) in comparison with other samples.

  18. The structure of the Caenorhabditis elegans manganese superoxide dismutase MnSOD-3-azide complex

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

    Hunter, Gary J.; Trinh, Chi H.; Bonetta, Rosalin; Stewart, Emma E.; Cabelli, Diane E.; Hunter, Therese

    2015-08-27

    C. elegans MnSOD-3 has been implicated in the longevity pathway and its mechanism of catalysis is relevant to the aging process and carcinogenesis. The structures of MnSOD-3 provide unique crystallographic evidence of a dynamic region of the tetrameric interface (residues 4154). We have determined the structure of the MnSOD-3-azide complex to 1.77- resolution. The analysis of this complex shows that the substrate analog, azide, binds end-on to the manganese center as a sixth ligand and that it ligates directly to a third and new solvent molecule also positioned within interacting distance to the His30 and Tyr34 residues of the substratemoreaccess funnel. This is the first structure of a eukaryotic MnSOD-azide complex that demonstrates the extended, uninterrupted hydrogen-bonded network that forms a proton relay incorporating three outer sphere solvent molecules, the substrate analog, the gateway residues, Gln142, and the solvent ligand. This configuration supports the formation and release of the hydrogen peroxide product in agreement with the 5-6-5 catalytic mechanism for MnSOD. The high product dissociation constant k? of MnSOD-3 reflects low product inhibition making this enzyme efficient even at high levels of superoxide.less

  19. IL.26

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-SessionsSouth DakotaRobbins and700, 1.Reports1E~ S·D3GraniteS T A/ I'ixa6-q

  20. Prot. n. 943/2013 BANDO DI SELEZIONE PER IL CONFERIMENTO DI N. 1 ASSEGNO PER LO

    E-Print Network [OSTI]

    'Universit degli Studi di Roma "La Sapienza". Il titolo del progetto di ricerca : "Analisi di risposta sismica effetti del non sincronismo dell'azione sismica sulle costruzioni; livelli di conoscenza e fattori di

  1. Prot. n. 566/2014 BANDO DI SELEZIONE PER IL CONFERIMENTO DI N. 1 ASSEGNO PER LO

    E-Print Network [OSTI]

    Di Pillo, Gianni

    'Universit degli Studi di Roma "La Sapienza". Il titolo del progetto di ricerca : "Analisi di Risposta sismica effetti del non sincronismo dell'azione sismica sulle costruzioni; livelli di conoscenza e fattori di

  2. O RNL/TM -2000/152 Costs ofO ilD e pe nde nce

    E-Print Network [OSTI]

    O RNL/TM -2000/152 Costs ofO ilD e pe nde nce : A 2000 Update David L. Greene Oak Ridge National . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2. COST COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2 MACROECONOMIC ADJUSTMENT COSTS . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2

  3. University of Wisconsin -Madison Dean'sHonorsandAwards

    E-Print Network [OSTI]

    Emshwiller, Eve

    Edgerton WI USA Dean's List53534 AnthonyBird Arthur Beaver Dam WI USA Dean's List53916 RyanAgriculturalandLifeSciences Last First Middle City State Postal Country Honor JunaAbazi Oak Creek WI USA Dean's List53154 AhmadAbdl-Haleem Amer Muscoda WI USA Dean's List53573 AllisonAbellaneda Marie Lakeville MN USA Dean's List55044 Faye

  4. ROLE OF TRIVALENT Mn IN OXIDATION OF ORGANIC MATTER Christopher J. Matocha and D.L. Sparks

    E-Print Network [OSTI]

    Sparks, Donald L.

    organic matter^ M AT E R I A L S A N D M E T H O D S Reactivity studies of solid Mn(lll,IV) (hydr) oxide of available Mn(lli). R E S U L T S No correlation existed between the initial reductive dissolution ratesROLE OF TRIVALENT Mn IN OXIDATION OF ORGANIC MATTER Christopher J. Matocha and D.L. Sparks Dept

  5. Large scale and fast synthesis of multiferroic TbMn{sub 2}O{sub 5} single-crystalline nanorods

    SciTech Connect (OSTI)

    An, Xiaoxin; Wang, You; Deng, Jinxia; Chen, Jun, E-mail: junchen@ustb.edu.cn; Xing, Xianran, E-mail: xing@ustb.edu.cn

    2014-03-01

    Graphical abstract: - Highlights: Pure TbMn{sub 2}O{sub 5} phase was synthesized in a wide temperature range for a short time. Smooth and uniform single-crystalline nanorods were obtained. The element Mn in TbMn{sub 2}O{sub 5} exhibits a mix Mn{sup 3+/4+} valence state with an average value of 3.5+, and the element Tb exhibits Tb{sup 3+}. - Abstract: Crystalline multiferroic TbMn{sub 2}O{sub 5} nanorods were successfully synthesized by a facile and scalable molten salt synthesis with NaClNa{sub 2}SO{sub 4} eutectic salts used in the temperature range of 750900 C for only 2 h. The obtained TbMn{sub 2}O{sub 5} could be indexed to an orthorhombic phase by the results of XRD patterns. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), combined with high-resolution TEM (HRTEM), selected area electron diffraction (SAED), and EDS, have been employed to investigate the morphology, size, crystallinity, structure, and composition of the as-synthesized TbMn{sub 2}O{sub 5} nanorods. The TbMn{sub 2}O{sub 5} product exhibits smooth, uniform and crystalline nanorods with diameters of 3070 nm, and length of varying from 3 to 6 ?m. The results of X-ray photoelectron spectroscopy (XPS) analysis indicate that the elements Mn and Tb in TbMn{sub 2}O{sub 5} exhibit Mn{sup 3+/4+} and Tb{sup 3+}, respectively. The magnetic properties of the as-prepared TbMn{sub 2}O{sub 5} nanorods have been also characterized by physical properties measurement system (PPMS)

  6. Electron scattering mechanisms in Cu-Mn films for interconnect applications

    SciTech Connect (OSTI)

    Misjk, F.; Nagy, K. H.; Radnczi, G.; Lobotka, P.

    2014-08-28

    Electrical properties and corresponding structural features of Cu-Mn alloy films with potential application as barrier and interconnect layers were studied. Cu-Mn films were deposited by DC magnetron sputtering at room temperature on SiO{sub 2} substrates. Electrical resistivity measurements were made as a function of film composition and temperature. The specific resistivity varies linearly with the Mn content showing a maximum of 205???cm at 80 at. % Mn. The temperature coefficient of resistance (TCR) of all alloy films is low, showing non-metallic conductivity for most compositions. Also a minimum TCR has been observed in the 4080 at. % Mn range which was attributed to a magnetic transformation around 200300?K. Electrical resistivity measurements are correlated with the film structure revealed by transmission electron microscopy to clarify the phase regions throughout the composition range. In the 2040 at. % and 7080 at. % Mn ranges, two-phase structures were identified, where Cu- or Mn-rich solid solution grains were surrounded by a thin amorphous covering layer. Based on the revealed phase regions and morphologies electron scattering mechanisms in the system were evaluated by combining the Matthiessen's rule and the Mayadas-Schatzkes theory. Grain boundary reflectivity coefficients (r?=?0.60.8) were calculated from fitting the model to the measurements. The proposed model indicates that, in a binary system, the special arrangement of the two phases results in new scattering mechanisms. The results are of value in optimizing the various parameters needed to produce a suitable barrier layer.

  7. Properties of Ga{sub 1-x}Mn{sub x}As with high x (>0.1)

    SciTech Connect (OSTI)

    Chiba, D.; Yu, K. M.; Walukiewicz, W.; Nishitani, Y.; Matsukura, F.; Ohno, H.

    2008-04-01

    We have investigated the magnetic and the crystalline properties of a set of Ga{sub 1-x}Mn{sub x}As layers with high nominal Mn compositions (x=0.101-0.198). Magnetization measurements and combined channeling Rutherford backscattering (c-RBS) and particle induced x-ray emission (c-PIXE) measurements have been performed to determine the effective Mn composition x{sub eff} and the fraction of Mn atoms at various lattice sites. Here, x{sub eff} determined from magnetization measurements, which increases with increasing x, is consistent with the results determined from c-RBS-PIXE measurements.

  8. Disordered electronic and magnetic systems - transition metal (Mn) and rare earth (Gd) doped amorphous group IV semiconductors (C, Si, Ge)

    E-Print Network [OSTI]

    Zeng, Li

    2007-01-01

    a test bed for simple spintronic devices. (In, Mn)As and (in novel electronic and spintronic materials have drawnpotential applications as spintronic materials. While many

  9. Electronic structure study of the magnetoresistance material CaCu3Mn4O12 by LSDA and LSDAU

    E-Print Network [OSTI]

    Gong, Xingao

    -like orbitals (dxy ,dyz , and dxz are almost full-filled, while the spin-up eg-like orbitals (d3z2 r2 and dx2 y2 of Mn3 (t2g 3 eg 1 ) and Mn4 (t2g 3 eg 0 ). Three spin- polarized d electrons in the t2g orbital of Mn3 and Mn4 cations form an inert spin core S 3/2, and the last one eg electron is itinerant. The eg electron

  10. Enhanced ferromagnetic order in Sr{sub 4}Mn{sub 3}O{sub 3}(GeO{sub 4}){sub 3} featuring canted [MnO{sub 4}]{sub ?} spin chains of mixed-valent Mn(III)/Mn(IV). Aliovalent substitution of the Sr{sub 4?x}Ln{sub x}Mn{sup III}{sub 2+x}Mn{sup IV}{sub 1?x}O{sub 3}(GeO{sub 4}){sub 3} solid-solution

    SciTech Connect (OSTI)

    West, J. Palmer; Sulejmanovic, Dino; Becht, Gregory; He, Jian; Hitchcock, Dale; Yan, Yonggao; Hwu, Shiou-Jyh

    2013-10-15

    Crystals of Sr{sub 4?x}Ln{sub x}Mn{sub 3}O{sub 3}(GeO{sub 4}){sub 3} (x=0; x?0.15 for Ln=La, Pr, Nd, Sm. Eu, Gd, Dy; x?0.3 for Ln=Gd) were isolated upon using high-temperature, solid-state methods in molten-salt media. These compounds are isostructural with the previously reported Na{sub 3}LnMn{sub 3}O{sub 3}(AsO{sub 4}){sub 3} (Ln=La, Sm, Gd) series that contains the same [MnO{sub 4}]{sub ?} spin chains. The synthesis of the Sr{sub 4}Mn{sub 3}O{sub 3}(GeO{sub 4}){sub 3} (x=0) phase was carried out by a double aliovalent substitution with respect to the Sr{sup 2+} and Ge{sup 4+} ions that replace Na{sup +}/Ln{sup 3+} and As{sup 5+} in Na{sub 3}LnMn{sub 3}O{sub 3}(AsO{sub 4}){sub 3}, respectively. The title series contains mixed-valent Mn(III)/Mn(IV) and shows a limited range of solid solution, both of which were not observed in the previously reported Na{sub 3}LnMn{sub 3}O{sub 3}(AsO{sub 4}){sub 3} series. To form the Sr{sub 4?x}Ln{sub x}Mn{sub 3}O{sub 3}(GeO{sub 4}){sub 3} solid solution, one of the Sr{sup 2+} sites, i.e., the original Ln-site in Na{sub 3}LnMn{sub 3}O{sub 3}(AsO{sub 4}){sub 3}, is partially substituted by Ln{sup 3+} in a statistical disorder of Sr{sub 1?x}/Ln{sub x}. Initial magnetic investigations of selected derivatives reveal higher ferromagnetic ordering temperatures than those reported for the Na{sub 3}LnMn{sub 3}O{sub 3}(AsO{sub 4}){sub 3} series, presumably attributed to a lesser degree of canting as a result of introducing non-JahnTeller Mn{sup 4+} ions. Also intriguing is the observation of multiple anomalies at low temperatures which appear to be of electronic origins. - Graphical abstract: Sr{sub 4?x}Ln{sub x}Mn(III){sub 2+x}Mn(IV){sub 1?x}O{sub 3}(GeO{sub 4}){sub 3}. Display Omitted - Highlights: Double aliovalent substitution: Sr{sub 4}Mn{sub 3}O{sub 3}(GeO{sub 4}){sub 3} with respect to Na{sub 3}LnMn{sub 3}O{sub 3}(AsO{sub 4}){sub 3}. Solid solution with respect to statistical disorder of Sr{sub 1?x}Ln{sub x} in one of the two Sr sites. Mn{sup 3+}/Mn{sup 4+} magnetic ions are spatially arranged in a triangular kagom fashion. Enhanced ferromagnetic ordering attributed to doping non-JahnTeller Mn{sup 4+}.

  11. DOE - Office of Legacy Management -- Eimco Corp - IL 0-01

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-SessionsSouth Dakota Edgemont, SouthLaboratoryDiv - NYCorp - NJEimco Corp - IL

  12. DOE - Office of Legacy Management -- Hydroblast Corp - IL 0-03

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-SessionsSouth Dakota Edgemont, SouthLaboratoryDivHarshawHydroblast Corp - IL

  13. File:USDA-CE-Production-GIFmaps-IL.pdf | 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 Home Page on QA:QAsource History View New Pages RecentTempCampApplicationWorksheet 2011.pdf JumpTransmission SitingFL.pdfIL.pdf Jump

  14. Comparison of LiMnPO4 made by Combustion and Hydrothermal Syntheses

    SciTech Connect (OSTI)

    Chen, Jiajun; Doeff, Marca M.; Wang, Ruigang

    2008-05-15

    Among the olivine-structured metal phosphate family, LiMnPO{sub 4} exhibits a high discharge potential (4V), which is still compatible with common electrolytes, making it interesting for use in the next generation of Li ion batteries. The extremely low electronic conductivity of this material severely limits its electrochemical performance, however. One strategy to overcome this limitation is to make LiMnPO{sub 4} nanoparticulate to decrease the diffusion distance. Another is to add a carbon or other conductive coating in intimate contact with the nanoparticles of the main phase, as is commonly done with LiFePO{sub 4}. The electrochemical performance of LiFePO{sub 4} is highly dependent on the quality of the carbon coatings on the particles [1-2], among other variables. Combustion synthesis allows the co-synthesis of nanoparticles coated with carbon in one step. Hydrothermal synthesis is used industrially to make LiFePO{sub 4} cathode materials [3] and affords a good deal of control over purity, crystallinity, and particle size. A wide range of olivine-structured materials has been successfully prepared by this technique [4], including LiMnPO{sub 4} in this study. In this paper, we report on the new synthesis of nano-LiMnPO{sub 4} by a combustion method. The purity is dependent upon the conditions used for synthesis, including the type of fuel and precursors that are chosen. The fuel to nitrate ratio influences the combustion temperature, which determines the type and amount of carbon found in the LiMnPO{sub 4} composites. This can further be modified by use of carbon structural modifiers added during a subsequent (optional) calcination step. Figure 1 shows a transmission electron microscopy (TEM) image of the spherical nano-sized LiMnPO{sub 4} particles typically formed by combustion synthesis. The average particle size is around 30 nm, in agreement with values obtained by the Rietveld refinement of XRD patterns. The small size of the particles cause the peak broadening evident in the pattern of combustion formed LiMnPO{sub 4}, shown in Figure 2. Figure 2 also shows a pattern of hydrothermally prepared LiMnPO{sub 4}, which is sub-micron in size. In this presentation, we will show how the crystallographic parameters, particle size, particle morphology, and carbon content and structure impact the electrochemical properties of the LiMnPO{sub 4}/C composites produced by these methods.

  15. Comparison of LiMnPO4 made by Combustion and Hydrothermal Syntheses

    SciTech Connect (OSTI)

    Chen, Jiajun; Doeff, Marca M.; Wang, Ruigang

    2008-10-12

    Among the olivine-structured metal phosphate family, LiMnPO{sub 4} exhibits a high discharge potential (4V), which is still compatible with common electrolytes, making it interesting for use in the next generation of Li ion batteries. The extremely low electronic conductivity of this material severely limits its electrochemical performance, however. One strategy to overcome this limitation is to make LiMnPO{sub 4} nanoparticulate to decrease the diffusion distance. Another is to add a carbon or other conductive coating in intimate contact with the nanoparticles of the main phase, as is commonly done with LiFePO{sub 4}. The electrochemical performance of LiFePO{sub 4} is highly dependent on the quality of the carbon coatings on the particles, among other variables. Combustion synthesis allows the co-synthesis of nanoparticles coated with carbon in one step. Hydrothermal synthesis is used industrially to make LiFePO{sub 4} cathode materials and affords a good deal of control over purity, crystallinity, and particle size. A wide range of olivine-structured materials has been successfully prepared by this technique, including LiMnPO{sub 4} in this study. In this paper, we report on the new synthesis of nano-LiMnPO{sub 4} by a combustion method. The purity is dependent upon the conditions used for synthesis, including the type of fuel and precursors that are chosen. The fuel to nitrate ratio influences the combustion temperature, which determines the type and amount of carbon found in the LiMnPO{sub 4} composites. This can further be modified by use of carbon structural modifiers added during a subsequent (optional) calcination step. Figure 1 shows a transmission electron microscopy (TEM) image of the spherical nano-sized LiMnPO{sub 4} particles typically formed by combustion synthesis. The average particle size is around 30 nm, in agreement with values obtained by the Rietveld refinement of XRD patterns. The small size of the particles cause the peak broadening evident in the pattern of combustion formed LiMnPO{sub 4}, shown in Figure 2. Figure 2 also shows a pattern of hydrothermally prepared LiMnPO{sub 4}, which is sub-micron in size. In this presentation, we will show how the crystallographic parameters, particle size, particle morphology, and carbon content and structure impact the electrochemical properties of the LiMnPO{sub 4}/C composites produced by these methods.

  16. Disorder dependent half-metallicity in Mn{sub 2}CoSi inverse Heusler alloy

    SciTech Connect (OSTI)

    Singh, Mukhtiyar; Saini, Hardev S.; Thakur, Jyoti; Reshak, Ali H.; Kashyap, Manish K.

    2013-12-15

    Heusler alloys based thin-films often exhibit a degree of atomic disorder which leads to the lowering of spin polarization in spintronic devices. We present ab-initio calculations of atomic disorder effects on spin polarization and half-metallicity of Mn{sub 2}CoSi inverse Heusler alloy. The five types of disorder in Mn{sub 2}CoSi have been proposed and investigated in detail. The A2{sub a}-type and B2-type disorders destroy the half-metallicity whereas it sustains for all disorders concentrations in DO{sub 3a}- and A2{sub b}-type disorder and for smallest disorder concentration studied in DO{sub 3b}-type disorder. Lower formation energy/atom for A2{sub b}-type disorder than other four disorders in Mn{sub 2}CoSi advocates the stability of this disorder. The total magnetic moment shows a strong dependence on the disorder and the change in chemical environment. The 100% spin polarization even in the presence of disorders explicitly supports that these disorders shall not hinder the use of Mn{sub 2}CoSi inverse Heusler alloy in device applications. - Graphical abstract: Minority-spin gap (E{sub g?}) and HM gap (E{sub sf}) as a function of concentrations of various possible disorder in Mn{sub 2}CoSi inverse Heusler alloy. The squares with solid line (black color)/dotted line (blue color)/dashed line (red color) reperesents E{sub g?} for DO{sub 3a}-/DO{sub 3b}-/A2{sub b}-type disorder in Mn{sub 2}CoSi and the spheres with solid line (black color)/dottedline (blue color)/dashed line (red color) represents E{sub sf} for DO{sub 3a}-/DO{sub 3b}-/A2{sub b}-type disorder in Mn{sub 2}CoSi. - Highlights: The DO{sub 3}- and A2-type disorders do not affect the half-metallicity in Mn{sub 2}CoSi. The B2-type disorder solely destroys half-metallicity in Mn{sub 2}CoSi. The A2-type disorder most probable to occur out of all three types. The total spin magnetic moment strongly depends on the disorder concentrations.

  17. High-Resolution Structure of the Photosynthetic Mn4Ca Catalyst from X-ray Spectroscopy

    SciTech Connect (OSTI)

    Yachandra, Vittal; Yano, Junko; Kern, Jan; Pushkar, Yulia; Sauer, Kenneth; Glatzel, Pieter; Bergmann, Uwe; Messinger, Johannes; Zouni, Athina; Yachandra, Vittal K.

    2007-08-01

    The application of high-resolution X-ray spectroscopy methods to study the photosynthetic water oxidizing complex, which contains a unique hetero-nuclear catalytic Mn4Ca cluster, are described. Issues of X-ray damage especially at the metal sites in the Mn4Ca cluster are discussed. The structure of the Mn4Ca catalyst at high-resolution which has so far eluded attempts of determination by X-ray diffraction, EXAFS and other spectroscopic techniques has been addressed using polarized EXAFS techniques applied to oriented PS II membrane preparations and PS II single crystals. A review of how the resolution of traditional EXAFS techniques can be improved, using methods such as range-extended EXAFS is presented, and the changes that occur in the structure of the cluster as it advances through the catalytic cycle are described. X-ray absorption and emission techniques (XANES and K? emission) have been used earlier to determine the oxidation states of the Mn4Ca cluster, and in this report we review the use of X-ray resonant Raman spectroscopy to understand the electronic structure of the Mn4Ca cluster as it cycles through the intermediate S-states.

  18. Electronic structural and magnetic properties of Mn{sub 5}Ge{sub 3} clusters

    SciTech Connect (OSTI)

    Yuan, H. K.; Chen, H. Kuang, A. L.; Tian, C. L.; Wang, J. Z.

    2013-11-28

    Theoretical understanding of the stability, ferromagnetism, and spin polarization of Mn{sub 5}Ge{sub 3} clusters has been performed by using the density functional theory with generalized gradient approximation for exchange and correlation. The magnetic moments and magnetic anisotropy energy (MAE) have been calculated for both bulk and clusters, and the enhanced magnetic moment as well as the enlarged MAE have been identified in clusters. The most attractive achievement is that Mn{sub 5}Ge{sub 3} clusters show a fine half-metallic character with large energy scales. The present results may have important implications for potential applications of small Mn{sub 5}Ge{sub 3} clusters as both emerging spintronics and next-generation data-storage technologies.

  19. Ferromagnetism and the electronic band structure in (Ga,Mn)(Bi,As) epitaxial layers

    SciTech Connect (OSTI)

    Yastrubchak, O., E-mail: yastrub@hektor.umcs.lublin.pl [Institute of Physics, Maria Curie-Sklodowska University in Lublin, Pl. M. Curie-Sk?odowskiej 1, 20-031 Lublin (Poland); Institute of Semiconductor Physics, National Academy of Sciences, 41 pr. Nauki, 03028 Kyiv (Ukraine); Sadowski, J. [MAX-IV Laboratory, Lund University, P.O. Box 118, SE-221 00 Lund (Sweden); Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warsaw (Poland); Gluba, L.; ?uk, J.; Kulik, M. [Institute of Physics, Maria Curie-Sklodowska University in Lublin, Pl. M. Curie-Sk?odowskiej 1, 20-031 Lublin (Poland); Domagala, J. Z.; Andrearczyk, T.; Wosinski, T. [Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warsaw (Poland); Rawski, M. [Analytical Laboratory, Maria Curie-Sklodowska University in Lublin, Pl. M. Curie-Sk?odowskiej 3, 20-031 Lublin (Poland)

    2014-08-18

    Impact of Bi incorporation into (Ga,Mn)As layers on their electronic- and band-structures as well as their magnetic and structural properties has been studied. Homogenous (Ga,Mn)(Bi,As) layers of high structural perfection have been grown by the low-temperature molecular-beam epitaxy technique. Post-growth annealing treatment of the layers results in an improvement of their structural and magnetic properties and an increase in the hole concentration in the layers. The modulation photoreflectance spectroscopy results are consistent with the valence-band model of hole-mediated ferromagnetism in the layers. This material combines the properties of (Ga,Mn)As and Ga(Bi,As) ternary compounds and offers the possibility of tuning its electrical and magnetic properties by controlling the alloy composition.

  20. State 2007 2008 2009 2010 2011 2012 Alabama 16 13 6 9 7 7 -56%

    E-Print Network [OSTI]

    Fernandez, Eduardo

    3 CA 50 OR 5 WA 13 WY 0 ND 5 SD 0 NE 9 KS 5 OK 7 MN 14 WI 12 MI 43 IA 7 MO 19 IL 55 AR 4 AL 7 AK 2 5 6 200% Vermont 5 6 6 5 6 9 80% Virginia 38 40 41 45 49 52 37% Washington 8 8 6 12 13 13 63% West Virginia 6 7 4 2 6 7 17% Wisconsin 10 13 17 18 19 12 20% Wyoming 0 0 0 1 0 0 0% Total States 26,166 26

  1. Shell Model for Atomistic Simulation of Lithium Diffusion in Mixed Mn/Ti Oxides

    SciTech Connect (OSTI)

    Kerisit, Sebastien N.; Chaka, Anne M.; Droubay, Timothy C.; Ilton, Eugene S.

    2014-10-23

    Mixed Mn/Ti oxides present attractive physicochemical properties such as their ability to accommodate Li for application in Li-ion batteries. In this work, atomic parameters for Mn were developed to extend an existing shell model of the Li-Ti-O system and allow simulations of pure and lithiated Mn and mixed Mn/Ti oxide polymorphs. The shell model yielded good agreement with experimentally-derived structures (i.e. lattice parameters and inter-atomic distances) and represented an improvement over existing potential models. The shell model was employed in molecular dynamics (MD) simulations of Li diffusion in the 11 c direction channels of LixMn1 yTiyO2 with the rutile structure, where 0 ? x ? 0.25 and 0 ? y ? 1. In the infinite dilution limit, the arrangement of Mn and Ti ions in the lattice was found to have a significant effect on the activation energy for Li diffusion in the c channels due to the destabilization of half of the interstitial octahedral sites. Anomalous diffusion was demonstrated for Li concentrations as low as x = 0.125, with a single Li ion positioned in every other c channel. Further increase in Li concentration showed not only the substantial effect of Li-Li repulsive interactions on Li mobility but also their influence on the time dependence of Li diffusion. The results of the MD simulations can inform intrinsic structure-property relationships for the rational design of improved electrode materials for Li-ion batteries.

  2. Conditioning effects on La1-xSrxMnO3-Yttria stabilized Zirconia electrodes for thin-film solid oxide fuel cells

    E-Print Network [OSTI]

    2002-01-01

    x MnO 3 -Yttria Stabilized Zirconia Electrodes for Thin-FilmMnO 3 -yttria stabilized zirconia) were deposited onto dense1.5 h in acetone, using zirconia milling media. The LSM- YSZ

  3. Spectroscopy of jet-cooled AlMn and trends in the electronic structure of the 3d transition metal aluminides

    E-Print Network [OSTI]

    Morse, Michael D.

    Spectroscopy of jet-cooled AlMn and trends in the electronic structure of the 3d transition metal, Utah 84112 (Received 9 May 1994; accepted 28 June 1994) Jet-cooled diatomic AlMn has been

  4. MnPASS System Study Phase 2 Prepared for the Minnesota Department of Transportation by Cambridge Systematics, Inc. with SRF

    E-Print Network [OSTI]

    Minnesota, University of

    will be put in place during construction The Next Opportunity See Cayuga Project materials at: http://www.dot.state.mn.us/metro/projects/cayuga/indexPASS onto the Twin City Highway System Identified a potential MnPASS system Studied cost, operational provide increased trip reliability and user choice in a cost-effective manner (I-394) New lower cost

  5. Ultrathin Spinel LiMn2O4 Nanowires as High Power Cathode Materials for Li-Ion Batteries

    E-Print Network [OSTI]

    Cui, Yi

    Ultrathin Spinel LiMn2O4 Nanowires as High Power Cathode Materials for Li-Ion Batteries Hyun diameters less than 10 nm and lengths of several micrometers. Galvanostatic battery testing showed that Li, lithium ion battery, LiMn2O4 nanowires, high power density, Jahn-Teller distortion T he high energy

  6. Mn3O4-Graphene Hybrid as a High-Capacity Anode Material for Lithium Ion Hailiang Wang,,

    E-Print Network [OSTI]

    Cui, Yi

    Mn3O4-Graphene Hybrid as a High-Capacity Anode Material for Lithium Ion Batteries Hailiang Wang hybrid materials of Mn3O4 nanoparticles on reduced graphene oxide (RGO) sheets for lithium ion battery-cost, and environ- mentally friendly anode for lithium ion batteries. Our growth-on- graphene approach should offer

  7. Iron-based soft magnetic composites with MnZn ferrite nanoparticles coating obtained by solgel method

    E-Print Network [OSTI]

    Volinsky, Alex A.

    Iron-based soft magnetic composites with MnZn ferrite nanoparticles coating obtained by sol nanoparticles to coat iron powder. The nanocrystalline iron powders, with an average particle diameter of 20 nmZn ferrites. MnZn ferrite uniformly coated the surface of the powder particles, resulting in a reduced

  8. Synthesis of MnO{sub 2}-graphene composites with enhanced supercapacitive performance via pulse electrodeposition under supergravity field

    SciTech Connect (OSTI)

    Liu, Tingting; Shao, Guangjie; Ji, Mingtong; Wang, Guiling

    2014-07-01

    A method of pulse electrodeposition under supergravity field was proposed to synthesize MnO{sub 2}-graphene composites. Supergravity is very efficient for promoting mass transfer and decreasing concentration polarization during the electrodeposition process. The synthesis was conducted on our homemade supergravity equipment. The strength of supergravity field depended on the rotating speed of the ring electrode. 3D flower like MnO{sub 2} spheres composed of nanoflakes were acquired when the rotating speed was 3000 rpm. Graphene nanosheets play as a role of conductive substrates for MnO{sub 2} growing. The composites are evaluated as electrode materials for supercapacitors. Electrochemical results show that the maximum specific capacitance of the MnO{sub 2}-graphene composite is 595.7 F g{sup ?1} at a current density of 0.5 A g{sup ?1}. In addition, the composite exhibits excellent cycle stability with no capacitance attenuation after 1000 cycles. The approach provides new ideas for developing supercapacitor electrode materials with high performance. - Graphical abstract: 3D flower like MnO{sub 2} spheres composed of nanoflakes were acquired at 3000 rpm. - Highlights: MnO{sub 2}-graphene composites were prepared by pulse electrodeposition under supergravity. 3D flower like MnO{sub 2} spheres are anchored on the graphene nanosheets. The MnO{sub 2}-graphene electrode exhibits a specific capacitance of 595.7 F g{sup ?1}.

  9. MnO spin-wave dispersion curves from neutron powder diffraction

    SciTech Connect (OSTI)

    Goodwin, Andrew L.; Dove, Martin T.; Tucker, Matthew G.; Keen, David A.

    2007-02-15

    We describe a model-independent approach for the extraction of spin-wave dispersion curves from powder neutron total scattering data. Our approach is based on a statistical analysis of real-space spin configurations to calculate spin-dynamical quantities. The RMCPROFILE implementation of the reverse Monte Carlo refinement process is used to generate a large ensemble of supercell spin configurations from MnO powder diffraction data collected at 100 K. Our analysis of these configurations gives spin-wave dispersion curves for MnO that agree well with those determined independently using neutron triple-axis spectroscopic techniques.

  10. Perpendicularly magnetized {tau}-MnAl (001) thin films epitaxied on GaAs

    SciTech Connect (OSTI)

    Nie, S. H.; Zhu, L. J.; Lu, J.; Pan, D.; Wang, H. L.; Yu, X. Z.; Xiao, J. X.; Zhao, J. H.

    2013-04-15

    Perpendicularly magnetized {tau}-MnAl films have been epitaxied on GaAs (001) by molecular-beam epitaxy. Crystalline quality and magnetic properties of the samples were strongly dependent on growth temperature. The highest coercivity of 10.7 kOe, saturation magnetization of 361.4 emu/cm{sup 3}, perpendicular magnetic anisotropy constant of 13.65 Merg/cm{sup 3}, and magnetic energy product of 4.44 MGOe were achieved. These tunable magnetic properties make MnAl films valuable as excellent and cost-effective alternative for not only high density perpendicular magnetic recording storage and spintronics devices but also permanent magnets.

  11. Graphene in proximity to magnetic insulating LaMnO{sub 3}

    SciTech Connect (OSTI)

    Cheng, Guanghui; Wei, Laiming, E-mail: laiming@ustc.edu.cn, E-mail: cgzeng@ustc.edu.cn; Cheng, Long; Liang, Haixing; Zhang, Xiaoqiang; Li, Hui [Hefei National Laboratory for Physical Sciences at the Microscale (HFNL) and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China); Yu, Guolin [Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai 200083 (China); Zeng, Changgan, E-mail: laiming@ustc.edu.cn, E-mail: cgzeng@ustc.edu.cn [Hefei National Laboratory for Physical Sciences at the Microscale (HFNL) and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China); International Center for Quantum Design of Functional Materials (ICQD), HFNL, University of Science and Technology of China, Hefei, Anhui 230026 (China); Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China)

    2014-09-29

    Proximity to functional substrates may enhance the coupling between the quantum degrees of freedom and thus develop nontrivial quantum effects in graphene. Here, we demonstrate the successful fabrication of graphene in proximity to atomically flat magnetic insulating LaMnO{sub 3} films. The insulating nature of the LaMnO{sub 3} films not only ensures the electronic transport only occur in the graphene layers but also allow them to serve as dielectric layers for gating. Transport measurements reveal anomalous behaviors, including asymmetrical longitudinal magnetoresistivity and nonlinear Hall effect. This work may pave a way toward the realization of intriguing quantum phases in graphene.

  12. Relaxation of photoinduced spins and carriers in ferromagnetic InMnSb films

    SciTech Connect (OSTI)

    Nontapot, K.; Kini, R. N.; Gifford, A.; Merritt, T. R.; Khodaparast, G. A.; Wojtowicz, T.; Liu, X.; Furdyna, J. K. [Department of Physics, Virginia Tech, Blacksburg, Virginia 24061 (United States); Institute of Physics, Polish Academy of Sciences, 02-668 Warsaw (Poland); Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556 (United States)

    2007-04-02

    The authors report time resolved measurements and control of photoinduced spin and carrier relaxations in InMnSb ferromagnetic films with 2% Mn content (grown by low-temperature molecular beam epitaxy) using femtosecond laser pulses, and compare them to analogous measurements on InBeSb and InSb films. In this work, magneto-optical Kerr effect and standard pump-probe techniques provided a direct measure of the photoexcited spin and carrier lifetimes, respectively. They observe decrease in relaxations times in the high laser fluence regime and an absence of temperature dependence of the relaxation times.

  13. Ferromagnetism in Mn Substituted Zirconia: A Density-functional Theory Study

    E-Print Network [OSTI]

    Xingtao Jia; Wei Yang; Minghui Qin; Xinglai Zhang; Mingai Sun; Jianping Li

    2008-09-05

    We study the electronic structure and magnetism of 25% Mn substituted cubic Zirconia (ZrO2) with several homogeneous and heterogeneous doping profiles using density-functional theory calculations. We find that all doping profiles show half-metallic ferromagnetism (HMF), and delta-doping is most energy favorable while homogeneous doping has largest ferromagnetic stabilization energy. Using crystal field theory, we discuss the formation scheme of HMF. Finally, we speculate the potential spintronics applications for Mn doped ZrO2, especially as spin direction controllment.

  14. Enlarged Mn 3s splitting and room-temperature ferromagnetism in epitaxially grown oxygen doped Mn{sub 2}N{sub 0.86} films

    SciTech Connect (OSTI)

    Meng, M.; Wu, S. X. Ren, L. Z.; Zhou, W. Q.; Wang, Y. J.; Wang, G. L.; Li, S. W.

    2014-11-07

    Single-phase and oxygen doped Mn{sub 2}N{sub 0.86} thin films have been grown on MgO (111) by plasma-assisted molecular beam epitaxy. The films grow under tensile strain and, remarkably, they show ferromagnetic-like interactions at low temperature and ferromagnetic ordering agreed well with the Bloch-law T{sup 3/2} at room-temperature. We further demonstrate the enlarged Mn 3s splitting (6.46?eV) and its possible relation to the observed ferromagnetism. Our study not only provide a strategy for further theoretical work on oxygen doped manganese nitrides, but also shed promising light on utilizing its room-temperature FM property to fabricate spintronic devices.

  15. Microstructures and Mechanical Properties of Compositionally Complex Co-free FeNiMnCr18 FCC Solid Solution Alloy

    SciTech Connect (OSTI)

    Wu, Zhenggang [The University of Tennessee; Bei, Hongbin [ORNL

    2015-01-01

    Recently,a structurally-simplebutcompositionally-complex FeNiCoMnCr highentropyalloywasfoundto haveexcellentmechanicalproperties(e.g.,highstrengthandductility).Tounderstandthepotentialof using highentropyalloysasstructuralmaterialsforadvancednuclearreactorandpowerplants,itis necessary tohaveathoroughunderstandingoftheirstructuralstabilityandmechanicalpropertiesde- gradation underneutronirradiation.ThisrequiresustodevelopasimilarmodelalloywithoutCobe- cause materialwithCowillmakepost-neutron-irradiationtestingdifficult duetotheproductionofthe 60Co radioisotope.Toachievethisgoal,aFCC-structuredsingle-phasealloywithacompositionof FeNiMnCr18 wassuccessfullydeveloped.Thisnear-equiatomicFeNiMnCr18 alloy hasgoodmalleability and itsmicrostructurecanbecontrolledbythermomechanicalprocessing.Byrollingandannealing,the as-cast elongated-grained-microstructureisreplacedbyhomogeneousequiaxedgrains.Themechanical properties (e.g.,strengthandductility)oftheFeNiMnCr18 alloy arecomparabletothoseoftheequiatomic FeNiCoMnCr highentropyalloy.Bothstrengthandductilityincreasewithdecreasingdeformation temperature,withthelargestdifferenceoccurringbetween293and77K.Extensivetwin-bandswhich are bundlesofnumerousindividualtwinsareobservedwhenitistensile-fracturedat77K.Notwin bands aredetectedbyEBSDformaterialsdeformedat293Kandhigher.Theunusualtemperature-de- pendencies ofUTSanduniformelongationcouldbecausedbythedevelopmentofthedensetwin substructure, twin-dislocationinteractionsandtheinteractionsbetweenprimaryandsecondarytwin- ning systemswhichresultinamicrostructurerefinement andhencecauseenhancedstrainhardening and postponednecking.

  16. Observation of Precipitation Evolution in Fe-Ni-Mn-Ti-Al Maraging Steel using Atom Probe Tomography

    SciTech Connect (OSTI)

    Pereloma, E. V.; Stohr, R A; Miller, Michael K; Ringer, S. P.

    2009-01-01

    We describe the full decomposition sequence in an Fe-Ni-Mn-Ti-Al maraging steel during isothermal annealing at 550 C. Following significant pre-precipitation clustering reactions within the supersaturated martensitic solid solution, (Ni,Fe){sub 3}Ti and (Ni,Fe){sub 3}(Al,Mn) precipitates eventually form after isothermal aging for {approx}60 seconds. The morphology of the (Ni,Fe){sub 3}Ti particles changes gradually during aging from predominantly plate-like to rod-like, and, importantly, Mn and Al were observed to segregate to these precipitate/matrix interfaces. The (Ni,Fe){sub 3}(Al,Mn) precipitates occurred at two main locations: uniformly within the matrix and at the periphery of the (Ni,Fe){sub 3}Ti particles. We relate this latter mode of precipitation to the Mn-Al segregation.

  17. Growth of single-crystal {alpha}-MnO{sub 2} nanorods on multi-walled carbon nanotubes

    SciTech Connect (OSTI)

    Chen Yong; Liu Chenguang; Liu Chang; Lu Gaoqing; Cheng Huiming

    2007-11-06

    Single-crystal {alpha}-MnO{sub 2} nanorods were grown on multi-walled carbon nanotubes (MWNTs) in H{sub 2}SO{sub 4} aqueous solution. The morphology and microstructure of the composites were examined by transmission electron microscopy, high-resolution transmission electron microscopy (HRTEM), X-ray diffractometry and energy dispersive spectroscopy (EDS). The results show that {alpha}-MnO{sub 2} single-crystal nanorods with a mean diameter of 15 nm were densely grown on the surface of MWNTs. Those MWNTs/MnO{sub 2} composites were used as an electrode material for supercapacitors, and it was found that the supercapacitor performance using MWNTs/MnO{sub 2} composites was improved largely compared to that using pure MWNTs and {alpha}-MnO{sub 2} nanorod mechanically mixed with MWNTs.

  18. Algebra (Informatica) 9 gennaio 2003 Con pi di 18 punti si pu fare l'orale o accettare il voto dello scritto (30 e lode per chi

    E-Print Network [OSTI]

    Catenacci, Roberto

    Algebra (Informatica) ­ 9 gennaio 2003 Con più di 18 punti si può fare l'orale o accettare il voto

  19. BANDO DI SELEZIONE PER IL CONFERIMENTO DI n. 1 ASSEGNO PER LO SVOLGIMENTO DI ATTIVIT DI RICERCA -CATEGORIA B TIPOLOGIA I

    E-Print Network [OSTI]

    Di Pillo, Gianni

    a disfunzione cerebrale, psicopatologia e risposta ai trattamenti"- Responsabile Prof. Giuseppe a disfunzione cerebrale, psicopatologia e risposta ai trattamenti" presso il Dipartimento di Scienze

  20. Il teatro come denuncia e strumento di espressione del popolo: " I Dialoghi" di Ruzzante e "Morte accidentale di un anarchico" di Dario Fo

    E-Print Network [OSTI]

    Zamboni, Camilla

    2011-01-01

    cancaro, la sarae st da riso, sai ligava! 20 [RUZANTE afferma Fo, la beffa, il riso, fanno capire molto meglio

  1. Bulk and surface half-metallicity: The case of D0{sub 3}-type Mn{sub 3}Ge

    SciTech Connect (OSTI)

    Liu, Hao; Gao, G. Y. Hu, Lei; Ni, Yun; Zu, Fengxia; Zhu, Sicong; Wang, Shuling; Yao, K. L.

    2014-01-21

    Motivated by the experimental realization of D0{sub 22}-type Mn{sub 3}Ge (001) films [Kurt et al. Appl. Phys. Lett. 101, 132410 (2012)] and the structural stability of D0{sub 3}-type Heusler alloy Mn{sub 3}Ge [Zhang et al. J. Phys.: Condens. Matter 25, 206006 (2013)], we use the first-principles calculations based on the full potential linearized augmented plane-wave method to investigate the electronic and magnetic properties of D0{sub 3}-type Heusler alloy Mn{sub 3}Ge and its (001) surface. We show that bulk D0{sub 3}-Mn{sub 3}Ge is a half-metallic ferromagnet with the minority-spin energy gap of 0.52?eV and the magnetic moment of 1.00??{sub B} per formula unit. The bulk half-metallicity is preserved at the pure Mn-terminated (001) surface due to the large exchange split, but the MnGe-terminated (001) surface destroys the bulk half-metallicity. We also reveal that the surface stabilities are comparable between the D0{sub 3}-Mn{sub 3}Ge (001) and the experimental D0{sub 22}-Mn{sub 3}Ge (001), which indicates the feasibility to grow the Mn{sub 3}Ge (001) films with D0{sub 3} phase other than D0{sub 22} one. The surface half-metallicity and stability make D0{sub 3}-Mn{sub 3}Ge a promising candidate for spintronic applications.

  2. Comparison of the crystalline structure, morphology, and magnetic properties of -phase Mn/Cu3Au,,100... ultrathin films by varying the growth temperature

    E-Print Network [OSTI]

    Lin, Minn-Tsong

    Comparison of the crystalline structure, morphology, and magnetic properties of -phase Mn/Cu3Au behaviors in the crystalline structure, morphology, and magnetism. RT-Mn films reveal apparent layer the last de- cade, the pure - and -phase Mn films are prepared by epitaxial growth on single-crystalline

  3. Heteronuclear Mn-Ca/Sr Complexes, and Ca/Sr EXAFS SpectralComparisons with the Oxygen-Evolving Complex of Photosystem II

    SciTech Connect (OSTI)

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

    2007-12-19

    HeterometallicMn Ca and Mn Sr complexes have been preparedand employed as model complexes for Ca and Sr EXAFS spectral comparisonswith the Oxygen-Evolving Complex (OEC) of Photosystem II (PS II); thesehave revealed similarities that support the presence of at least one Oatom bridge between the Mn and Ca/Sr in the OEC.

  4. Electrodeposition of Mn-Co Alloys on Stainless Steels for SOFC Interconnect Application

    SciTech Connect (OSTI)

    Wu, J. (West Virginia University); Jiang, Y. (West Virginia University); Johnson, C.; Gong, M. (West Virginia University); Liu, X. (West Virginia University)

    2007-09-01

    Chromium-containing ferritic stainless steels are the most popular materials for solid oxide fuel cell (SOFC) interconnect applications because of its oxidation resistance and easy fabrication process. However, excessive scale growth and chromium evaporation will degrade the cell performance. Highly conductive coatings that resist oxide scale growth and chromium evaporation may prevent both of these problems. Mn1.5Co1.5O4 spinel is one of the most promising coatings for interconnect application because of its high conducitivy, good chromium retention capability, as well as good CTE match. Electroplating of alloys or thin film multilayers followed by controlled oxidation to the desired spinel phase offers an additional deposition option. In the present study binary Mn/Co alloys was fabricated by electrodeposition, and polarization curves were used to characterize the cathodic reactions on substrate surface. By controlling the current density precisely, coatings with Mn/Co around 1:1 has been successfully deposited in Mn/Co =10 solutions, SEM and EDX was used to characterize the surface morphology and composition.

  5. LABORATORY EXPERIMENT 11 Determination of microelements (Mn and Cu) in tea leaves

    E-Print Network [OSTI]

    Nazarenko, Alexander

    : Total contents - Mn and Cu in tea leaves by ashing and acid digestion Extractable contents: hot water to determine the total contents of a component, such as a metal element, being measured. On the other hand used will depend on the purpose of the study. For example, it may be that the total content of a metal

  6. Structural characterization of terrestrial microbial Mn oxides from Pinal Creek, AZ

    E-Print Network [OSTI]

    and oxidatively degrade or trans- form numerous organic and inorganic compounds, includ- ing humic and fulvic acids, aromatic hydrocarbons, Cr(III), Co(II), and hydrogen sulfide (Jenne, 1967; Huang, 1991(II)-oxidizing microorganisms in the envi- ronment (Tebo et al., 2004) and upon the much faster rates of Mn(II) oxidation

  7. Correlated chemostratigraphy of Mn-carbonate microbialites (rkt, Hungary) Mrta Polgri a,b,

    E-Print Network [OSTI]

    Mojzsis, Stephen J.

    ) microbialites at the rkt black shale-hosted manganese carbonate ore body (central Hungary) is described microbialites mostly behaved as an open system during deposition of black shale under early diagenetic reduction under an oxic water column; more equant types occur at the contact zone of black shale and Mn

  8. In Vitro Study on MgeSneMn Alloy as Biodegradable Metals Zhen Zhen1)

    E-Print Network [OSTI]

    Zheng, Yufeng

    for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China 2) Biomedical Engineering condition) in Hank's solution. Blood compatibility evaluation suggested that Mge3Sne0.5Mn alloy had improve the corrosion resistance, for its high hydrogen overvoltage[22] . In physiology, Sn is a trace

  9. Optical properties of metallic (III, Mn)V ferromagnetic semiconductors in the infrared to visible range

    E-Print Network [OSTI]

    Hankiewicz, EM; Jungwirth, T.; Dietl, T.; Timm, C.; Sinova, Jairo.

    2004-01-01

    We report on a study of the ac conductivity and magneto-optical properties of metallic ferromagnetic (III, Mn)V semiconductors in the infrared to visible spectrum at zero temperature. Our analysis is based on the successful kinetic exchange model...

  10. Effect of carbon doping on electronic transitions in Mn5Ge3 N. Stojilovic,1,a)

    E-Print Network [OSTI]

    Dordevic, Sasha V.

    these compounds promising candidates for spin injectors for potential spintronics applications. The resistivity mismatch between a metal and a semicon- ductor. Therefore, for spintronics applications, finding a compound is now being considered for use in spintronics applications.4 However, pure Mn5Ge3 has Tc 293 K,5 which

  11. MN 535 Green Manufacturing Fall'04: M-W noon-2PM

    E-Print Network [OSTI]

    Lin, Xi

    of the Manufacturing Process that aims to efficiently use energy, water and raw materials in order to minimize airMN 535 Green Manufacturing Fall'04: M-W noon-2PM Course Objective Provides a systems view and water pollution and generation of solid waste per unit of the manufactured product Class Discussion

  12. Modified magnetic ground state in NiMn2O4 thin films

    SciTech Connect (OSTI)

    Nelson-Cheeseman, B. B.; Chopdekar, R. V.; Toney, M. F.; Arenholz, E.; Suzuki, Y.; Iwata, J.M.

    2010-08-03

    We demonstrate the stabilization of a magnetic ground state in epitaxial NiMn2O4 (NMO) thin films not observed in their bulk counterpart. Bulk NMO exhibits a magnetic transition from a paramagnetic phase to a collinear ferrimagnetic moment configuration below 110 K and to a canted moment configuration below 70 K. By contrast, as-grown NMO films exhibit a single magnetic transition at 60 K and annealed films exhibit the magnetic behavior found in bulk. Cation inversion and epitaxial strain are ruled out as possible causes for the new magnetic ground state in the as-grown films. However, a decrease in the octahedral Mn{sup 4+}:Mn{sup 3+} concentration is observed and likely disrupts the double exchange that produces the magnetic state at intermediate temperatures. X-ray magnetic circular dichroism and bulk magnetometry indicate a canted ferrimagnetic state in all samples at low temperature. Together these results suggest that the collinear ferrimagnetic state observed in bulk NMO at intermediate temperatures is suppressed in the as grown NMO thin films due to a decrease in octahedral Mn{sup 4+} while the canted moment ferrimagnetic ordering is preserved below 60 K.

  13. FARGO-MOORHEAD METROPOLITAN AREA, ND AND MN FLOOD RISK MANAGEMENT PROJECT

    E-Print Network [OSTI]

    US Army Corps of Engineers

    FARGO-MOORHEAD METROPOLITAN AREA, ND AND MN FLOOD RISK MANAGEMENT PROJECT 23 September 2011, and technically feasible flood risk management for Fargo, North Dakota, Moorhead, Minnesota, and the surrounding area, and a storage area to reduce the existing and future flood risk and damages to public and private

  14. Tracing bottom water oxygenation with sedimentary Mn/Fe ratios in Lake Zurich, Switzerland

    E-Print Network [OSTI]

    Gilli, Adrian

    Tracing bottom water oxygenation with sedimentary Mn/Fe ratios in Lake Zurich, Switzerland and Management, Seestrasse 79, CH-6047 Kastanienbaum, Switzerland b ETH Zurich, Institute for Biogeochemistry and Pollution Dynamics, Universitaetstrasse 16, CH-8092 Zurich, Switzerland c ETH Zurich, Geological Institute

  15. P0805-Hagen Oxidation States of Mn, Cr, and Co in

    E-Print Network [OSTI]

    on metal based interconnects in solid oxide fuel cell (SOFC) stack technology. The nature of the cations of the material, e.g., conductivity, which is of crucial importance in the fuel cell technology. In the present-Mn-Co-O are of great interest as layers of these materials are formed during operation at the metallic interconnects

  16. Spins and magnetic moments of 58;60;62;64Mn ground states and isomers

    E-Print Network [OSTI]

    H. Heylen; C. Babcock; J. Billowes; M. L. Bissell; K. Blaum; P. Campbell; B. Cheal; R. F. Garcia Ruiz; Ch. Geppert; W. Gins; M. Kowalska; K. Kreim; S. M. Lenzi; I. D. Moore; R. Neugart; G. Neyens; W. Nrtershuser; J. Papuga; D. T. Yordanov

    2015-08-25

    The odd-odd 54;56;58;60;62;64Mn isotopes (Z = 25) were studied using bunched-beam collinear laser spectroscopy at ISOLDE, CERN. From the measured hyperfine spectra the spins and magnetic moments of Mn isotopes up to N = 39 were extracted. The previous tentative ground state spin assignments of 58;60;62;64Mn are now firmly determined to be I = 1 along with an I = 4 assignment for the isomeric states in 58;60;62Mn. The I = 1 magnetic moments show a decreasing trend with increasing neutron number while the I = 4 moments remain quite constant between N = 33 and N = 37. The results are compared to large-scale shell-model calculations using the GXPF1A and LNPS effective interactions. The excellent agreement of the ground state moments with the predictions from the LNPS calculations illustrates the need for an increasing amount of proton excitations across Z = 28 and neutron excitations across N = 40 in the ground state wave functions from N = 37 onwards.

  17. Spins and magnetic moments of 58;60;62;64Mn ground states and isomers

    E-Print Network [OSTI]

    Heylen, H; Billowes, J; Bissell, M L; Blaum, K; Campbell, P; Cheal, B; Ruiz, R F Garcia; Geppert, Ch; Gins, W; Kowalska, M; Kreim, K; Lenzi, S M; Moore, I D; Neugart, R; Neyens, G; Nrtershuser, W; Papuga, J; Yordanov, D T

    2015-01-01

    The odd-odd 54;56;58;60;62;64Mn isotopes (Z = 25) were studied using bunched-beam collinear laser spectroscopy at ISOLDE, CERN. From the measured hyperfine spectra the spins and magnetic moments of Mn isotopes up to N = 39 were extracted. The previous tentative ground state spin assignments of 58;60;62;64Mn are now firmly determined to be I = 1 along with an I = 4 assignment for the isomeric states in 58;60;62Mn. The I = 1 magnetic moments show a decreasing trend with increasing neutron number while the I = 4 moments remain quite constant between N = 33 and N = 37. The results are compared to large-scale shell-model calculations using the GXPF1A and LNPS effective interactions. The excellent agreement of the ground state moments with the predictions from the LNPS calculations illustrates the need for an increasing amount of proton excitations across Z = 28 and neutron excitations across N = 40 in the ground state wave functions from N = 37 onwards.

  18. Tunable White-Light-Emitting Mn-Doped ZnSe Nanocrystals Vijay Kumar Sharma,

    E-Print Network [OSTI]

    Demir, Hilmi Volkan

    Se-related blue emission (410 and 435 nm), Zn-related defect state green emission (520 nm), and Mn-dopant related for the purpose of generation of photometrically high quality white light while maintaining the energy efficiency is to combine red-, green-, and blue-emitting NCs in an appropriate ratio.1,2 However, when one simply mixes

  19. Materials Research for Environment and Energy Hydrogen Embrittlement in Fe-Mn-C

    E-Print Network [OSTI]

    Cambridge, University of

    Materials Research for Environment and Energy - 1 - Hydrogen Embrittlement in Fe-Mn-C High Strength Seminar, May 23 #12;Materials Research for Environment and Energy - 2 - I had moved from NIMS to Kyushu.kaneaki@nims.go.jp> ********************* #12;Materials Research for Environment and Energy - 3 - #12;Materials Research for Environment

  20. Shannon D. Scott, RN, BN, MN, PhD Faculty of Nursing, University of Alberta

    E-Print Network [OSTI]

    Machel, Hans

    Shannon D. Scott, RN, BN, MN, PhD Faculty of Nursing, University of Alberta Level 3, 11405 Promotion Studies (Mentor Dr. Ron Plotnikoff), University of Alberta. Funded by: Canadian Institutes of Health Research Fellowship, Alberta Heritage Foundation for Medical Research Fellowship, and the Canadian

  1. CaMn2Sb2: Spin waves on a frustrated antiferromagnetic honeycomb lattice

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

    McNally, D. E.; Simonson, J. W.; Kistner-Morris, J. J.; Smith, G. J.; Hassinger, J. E.; DeBeer-Schmidt, L.; Kolesnikov, A. I.; Zaliznyak, I.; Aronson, M. C.

    2015-05-22

    We present inelastic neutron scattering measurements of the antiferromagnetic insulator CaMn2Sb2:, which consists of corrugated honeycomb layers of Mn. The dispersion of magnetic excitations has been measured along the H and L directions in reciprocal space, with a maximum excitation energy of ? 24 meV. These excitations are well described by spin waves in a Heisenberg model, including first and second neighbor exchange interactions, J1 and J2, in the Mn plane and also an exchange interaction between planes. The determined ratio J2/J1 ? 1/6 suggests that CaMn2Sb2: is the first example of a compound that lies very close to themoremean field tricritical point, known for the classical Heisenberg model on the honeycomb lattice, where the Neel phase and two different spiral phases coexist. The magnitude of the determined exchange interactions reveal a mean field ordering temperature ? 4 times larger than the reported Neel temperature TN = 85 K, suggesting significant frustration arising from proximity to the tricritical point.less

  2. MN-583 Product Management Fall 2004 SYLLABUS Instructor: William Hauser wmhauser@bu.edu

    E-Print Network [OSTI]

    Lin, Xi

    MN-583 Product Management Fall 2004 SYLLABUS Instructor: William Hauser wmhauser@bu.edu Office: Room 219, 730 Commonwealth Avenue Classroom: 15 St. Mary's Street, Room 105 617-358-0663 http Nature of the Product Management Task Case: The Hewlett Packard Company, The Sally Project 3 Wed, 15-Sep

  3. Solar DEM Model Proposal : A solar image in color band b, mn pixels,

    E-Print Network [OSTI]

    Wolfe, Patrick J.

    Solar DEM Model Proposal : A solar image in color band b, mn pixels, containing a particular solar 11 )( #12;Solar DEM Model Proposal : the volume (abundance?) of ion ii : the proportion of the total volume at temperature t t T t bitt I i ib MIE 11 )( #12;Solar Dataset 15 Filters.txt files

  4. Mn-Substituted Inorganic-Organic Hybrid Materials Based on ZnSe

    E-Print Network [OSTI]

    Li, Jing

    Mn-Substituted Inorganic-Organic Hybrid Materials Based on ZnSe: Nanostructures That May Lead research that deals with synthesis, characterization, and modification of organic-inorganic hybrid to integrate functional materials that utilize both electron charge and spin.1 Thus, the introduction

  5. Aliovalent titanium substitution in layered mixed Li Ni-Mn-Co oxides for lithium battery applications

    SciTech Connect (OSTI)

    Kam, Kinson; Doeff, Marca M.

    2010-12-01

    Improved electrochemical characteristics are observed for Li[Ni1/3Co1/3-yMyMn1/3]O2 cathode materials when M=Ti and y<0.07, compared to the baseline material, with up to 15percent increased discharge capacity.

  6. mn header will be provided by the publisher Linear Passive Stationary Scattering Systems

    E-Print Network [OSTI]

    Rovnyak, James

    mn header will be provided by the publisher Linear Passive Stationary Scattering Systems 26, Odessa 65020, Ukraine 2 Department of Mathematics, University of Virginia, P. O. Box 400137@farlep.net Corresponding author: e-mail: rovnyak@Virginia.edu e-mail: sergey saprikin@ukr.net Copyright line

  7. NEW COURSE NUMBER: ENG ME 579 Extra information on MN/SC579: Microelectronic Device Manufacturing

    E-Print Network [OSTI]

    Lin, Xi

    NEW COURSE NUMBER: ENG ME 579 Extra information on MN/SC579: Microelectronic Device Manufacturing for manufacturing engineering students to take for the following reason. Your future careers in manufacturing are undoubtedly most promising for the manufacturing of what is often referred to as "high technology" areas

  8. Microscopic mechanism of the noncrystalline anisotropic magnetoresistance in (Ga,Mn)As

    E-Print Network [OSTI]

    Vyborny, Karel; Kucera, Jan; Sinova, Jairo; Rushforth, A. W.; Gallagher, B. L.; Jungwirth, T.

    2009-01-01

    Starting with a microscopic model based on the Kohn-Luttinger Hamiltonian and kinetic p-d exchange combined with Boltzmann formula for conductivity we identify the scattering from magnetic Mn combined with the strong spin-orbit interaction of the GaAs...

  9. NEW COURSE NUMBER: ENG ME 560 MN 560 Precision Machine Design and Instrumentation

    E-Print Network [OSTI]

    Lin, Xi

    : Physics, Designs, and Applications; Jacob Fraden, Springer-Verlag Machinery's Handbook, Industrial PressNEW COURSE NUMBER: ENG ME 560 MN 560 Precision Machine Design and Instrumentation Fall 2006, M,W, 4:00 6:00 This inter-disciplinary course teaches the student how to design, instrument, and control high

  10. Single Nanorod Devices for Battery Diagnostics: A Case Study on LiMn2O4

    E-Print Network [OSTI]

    Cui, Yi

    nanostructure devices as a powerful new diagnostic tool for batteries with LiMn2O4 nanorod materials energy storage devices for portable electronic devices, power tools, and electrical vehicles.1-4 Anodes applied to battery researches. This work represents the first example of single nanostructure device

  11. Precipitation in the Equiatomic High-Entropy Alloy CrMnFeCoNi

    E-Print Network [OSTI]

    Pickering, E. J.; Muoz-Moreno, R.; Stone, H. J.; Jones, N. G.

    2015-11-02

    CrMnFeCoNi is widely considered to be an exemplar high-entropy alloy, which is stable as a single solid-solution phase at all temperatures below its melting point. Here, for the first time, the formation of two distinct types of Cr-rich precipitate...

  12. Shapes of Knotted Cyclic Polymers Eric J. Rawdon, University of St. Thomas, Saint Paul, MN, USA

    E-Print Network [OSTI]

    California at Santa Barbara, University of

    Shapes of Knotted Cyclic Polymers Eric J. Rawdon, University of St. Thomas, Saint Paul, MN, USA, USA Momentary configurations of long polymers at thermal equilibrium usually deviate from spherical of asphericity (or prolateness) that describe these momentary ellipsoidal shapes of a polymer are determined

  13. Local structure and polarization resistance of Ce doped SrMnO{sub 3} using extended x-ray fine structure analysis

    SciTech Connect (OSTI)

    Ryu, Jiseung; Lee, Heesoo, E-mail: heesoo@pusan.ac.kr [School of Materials Science and Engineering, Pusan National University, Busan 609-735 (Korea, Republic of)

    2014-09-15

    Changes to the local structure of Sr and Mn atoms in Sr{sub 1?x}Ce{sub x}MnO{sub 3} (SCM) according to increasing Ce content and the effect of the structural change on the polarization resistance of SCM were investigated. The reduction of manganese was confirmed by the absorption edge shift of the Mn K-edge toward lower energies. The noise of oscillation in extended X-ray absorption fine structure k{sup 3}? data at Mn K-edge reveals the distortion of the local structure of Mn atoms, and the peak that indicates the bonding length of Mn-O, Sr/Ce, and -Mn decreased with the addition of Ce content in Fourier transformations of the Mn K-edge. The distortion of the local structure at Mn atoms was affected by the reduced manganese ions having larger ionic radii than Mn{sup 4+}. Meanwhile, few distortions of local atomic structures of Sr atoms occurred, and the average nearest neighboring distances of Sr-O and Sr-Mn are ?2.13? and ?2.95?, respectively. The average bonding lengths of the Ce-O and Ce-Mn increased because the ionic radius of substituted Ce ion with 12 coordination number is smaller than that of Sr ion, which leads the reduction of Mn ions and the distortion of local structure at the substituted A-site. Therefore, we reasoned that the distortion of the local atomic structure at Mn atoms in MnO{sub 6} and Ce atoms in A-site is one of the causes for interrupting oxygen ion transfers as a geometric factor, which results in an increase in the polarization resistance of SCM within the Ce composition range from 10?mol.?% to 30?mol.?%.

  14. Helical antiferromagnetic ordering in Lu1-xScxMnSi

    SciTech Connect (OSTI)

    Goetsch, Ryan J; Anand, V K; Johnston, David C

    2014-08-01

    Polycrystalline samples of Lu1?xScxMnSi (x=0, 0.25, 0.5) are studied using powder x-ray diffraction, heat capacity Cp, magnetization, magnetic susceptibility ?, and electrical resistivity ? measurements versus temperature T and magnetic field H. This system crystallizes in the primitive orthorhombic TiNiSi-type structure (space group Pnma) as previously reported. The ?(T) data indicate metallic behavior. The Cp(T), ?(T), and ?(T) measurements consistently indicate long-range antiferromagnetic (AF) transitions with AF ordering temperatures TN=246, 215, and 188 K for x=0, 0.25, and 0.5, respectively. A second transition is observed at somewhat lower T for each sample from the ?(T) and ?(T) measurements, which we speculate are due to spin reorientation transitions; these second transitions are completely suppressed in H=5.5 T. The Cp data below 10 K for each composition indicate an enhanced Sommerfeld electronic heat capacity coefficient for the series in the range ?=2429 mJ/mol K2. The ?(T) measurements up to 1000 K were fitted by local-moment Curie-Weiss behaviors which indicate a low Mn spin S?1. The ? data below TN are analyzed using the Weiss molecular field theory for a planar noncollinear cycloidal AF structure with a composition-dependent pitch, following the previous neutron diffraction work of Venturini et al. [J. Alloys Compd. 256, 65 (1997)]. Within this model, the fits indicate a turn angle between Mn ordered moments along the cycloid axis of ?100? or ?145?, either of which indicate dominant AF interactions between the Mn spins in the Lu1?xScxMnSi series of compounds.

  15. Enhanced magnetic and electrical properties in amorphous Ge:Mn thin films by non-magnetic codoping

    SciTech Connect (OSTI)

    Yin Wenjing; Kell, Copeland D.; Duska, Chris; Lu Jiwei; Floro, Jerrold A. [Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904 (United States); He Li; Hull, Robert [Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180 (United States); Dolph, Melissa C. [Department of Physics, University of Virginia, Charlottesville, Virginia 22904 (United States); Wolf, Stuart A. [Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904 (United States); Department of Physics, University of Virginia, Charlottesville, Virginia 22904 (United States)

    2012-02-01

    Amorphous Ge{sub 1-x}Mn{sub x} thin films have been prepared by co-depositing Ge and Mn on SiO{sub 2}/Si using an ultrahigh vacuum molecular beam epitaxy system. Across a range of growth temperatures and Mn concentrations (2.8 at. %, 10.9 at. %, and 21.3 at. %), we achieved enhanced magnetic and electrical properties with non-magnetic codopants dispersed in the films. Self-assembled Mn-rich amorphous nanostructures were observed in the amorphous Ge matrix, either as isolated nanoclusters or as nanocolumns, depending on Mn concentration. The ferromagnetic saturation moments were found to increase with Mn concentration and reached a maximum of 0.7 {mu}{sub B}/Mn in the as-grown samples. Two magnetic transition temperatures around 15 K and 200 K were observed in these amorphous MBE-grown samples. Coercivity is considered within the context of local magnetic anisotropy. The anomalous Hall effect confirmed a strong correlation between the magnetization and transport properties, indicating that global ferromagnetic coupling was carrier-mediated rather than through direct exchange. In addition, negative magnetoresistance was detected from 5 K to room temperature.

  16. IL NUOVO CIMENTO VoL. XXXVI, N. 3 1o Aprlle 1965 Further Analysis of ~.-C~2 Scattering Process

    E-Print Network [OSTI]

    Bertero, Mario

    , instead-of analysing the real cross-section: (1) (where ~(0) = ~ - i ~ eosec~ 12 + ~ (2~ + 1) .P~(cos O ~-particles~ and 0 the c.m. scattering angle), the fictitious one given by 1 was analysed. This is the cross-sectionIL NUOVO CIMENTO VoL. XXXVI, N. 3 1o Aprlle 1965 Further Analysis of ~.-C~2 Scattering Process

  17. INNOVAZIONE E TRASFERIMENTO TECNOLOGICO Il 2006 ha visto una ridefinizione strategica e un potenziamento di obiettivi, strumenti, attivit e

    E-Print Network [OSTI]

    De Cindio, Fiorella

    secondo tre assi principali: Asse 1 Realizzare il trasferimento e valorizzare economicamente i trovati e sovrintendono all'istruttoria delle iniziative. Asse 2 Stabilire relazioni con le realtà esterne, promuovendo progetti e conoscenze. Asse 3 Promuovere la capacità di sviluppare una conoscenza e una capacità

  18. BANDO N. 1-2012 PER IL CONFERIMENTO DI INCARICO DI PROFESSORE STRAORDINARIO CON RAPPORTO DI LAVORO A TEMPO DETERMINATO

    E-Print Network [OSTI]

    Di Pillo, Gianni

    A TEMPO DETERMINATO Il Direttore del Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" Vista Rettorale n. 220 del 4.2.2011 Viste le delibere del Consiglio del Dipartimento di Fisiologia e Farmacologia Dipartimento di Fisiologia e Farmacologia e la societ Duemme Trust Company s.r.l. in data 14.05.2012 nella

  19. Bando n. 03_2012 AVVISO PUBBLICO DI SELEZIONE PER IL CONFERIMENTO DI N. 2 INCARICHI DI

    E-Print Network [OSTI]

    Di Pillo, Gianni

    DIPARTIMENTO DI FISIOLOGIA E FARMACOLOGIA "VITTORIO ERSPAMER" VISTO - Visto il Regolamento per l'affidamento di rappresentate dal Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer"; - Ravvisata conseguentemente la all'art. 1 del presente avviso a favore del Dipartimento di Fisiologia e Farmacologia "Vittorio

  20. BANDO DI SELEZIONE PER IL CONFERIMENTO DI ASSEGNI PER LO SVOLGIMENTO DI ATTIVIT DI RICERCA DI CATEGORIA B)

    E-Print Network [OSTI]

    Di Pillo, Gianni

    , rispettivamente del 12.04.2011 e del 19.04.2011; VISTA la delibera del Consiglio del Dipartimento di Fisiologia e scientifico disciplinare BIO 09, presso il Dipartimento di #12;Fisiologia e Farmacologia "Vittorio Erspamer del titolo di dottore di ricerca in Fisiologia [Physiology] o Psicobiologia e psicologia fisiologica

  1. Bando n. 01/2010 del 10 marzo 2010 per il reclutamento di un Ricercatore a Tempo Determinato APPROVAZIONE ATTI

    E-Print Network [OSTI]

    Di Pillo, Gianni

    APPROVAZIONE ATTI Il Direttore del Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" VISTO l'art. 7 Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" e la Fondazione "Enrico ed Enrica Sovena", con e loro costituenti chimici"; VISTA la Delibera del Consiglio del Dipartimento di Fisiologia e

  2. Genome-wide scan reveals association of psoriasis with IL-23 and NF-kB pathways

    E-Print Network [OSTI]

    Abecasis, Goncalo

    Genome-wide scan reveals association of psoriasis with IL-23 and NF-kB pathways Rajan P Nair1 Abecasis4,20, for the Collaborative Association Study of Psoriasis18 Psoriasis is a common immune-mediated disorder that affects the skin, nails and joints. To identify psoriasis susceptibility loci, we genotyped

  3. INCT FOR CLIMATE CHANGE | 2009.2010 | ACTIVITY REPORT | BRAzIL National Institute of Science and

    E-Print Network [OSTI]

    1 INCT FOR CLIMATE CHANGE | 2009.2010 | ACTIVITY REPORT | BRAzIL National Institute of Science and Technology for Climate Change December 2010 ISSN 2179-5754 #12;2 Overall coordination Carlos Programa FAPESP de Pesquisa sobre Mudanas Climticas Globais Executive Board of INCT for Climate Change

  4. Les hpitaux sont-ils des organisations haute fiabilit ? Apports du concept de HRO la GRH des

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    raliss auprs du personnel soignant de 4 centres hospitaliers de la rgion parisienne. Cet article entretien ralis dans une seconde collecte de donnes. Il apparat que le domaine hospitalier gnre des la GRH " Vers un management des ressources humaines durable et bienveillant ?, Marrakech : France

  5. Received 2 Oct 2014 | Accepted 2 Feb 2015 | Published 12 Mar 2015 IL-23-mediated mononuclear phagocyte crosstalk

    E-Print Network [OSTI]

    ARTICLE Received 2 Oct 2014 | Accepted 2 Feb 2015 | Published 12 Mar 2015 IL-23-mediated mononuclear phagocyte crosstalk protects mice from Citrobacter rodentium-induced colon immunopathology Tegest that colonic CX3CR1 mononuclear phagocytes are critical inducers of the innate response to Citrobacter

  6. 2013 Il Monito del Giardino Aaron Wolf, a geography professor in OSU's College of Earth, Ocean, and

    E-Print Network [OSTI]

    Kurapov, Alexander

    2013 Il Monito del Giardino Aaron Wolf, a geography professor in OSU's College of Earth, Ocean. Wolf took his MS in Water Resources (1990) and Ph.D. in Land Resources (1992) from University of Wisconsin, Madison. Aaron Wolf Professor, Geography "It is a real honor to have this work being recognized

  7. Selezione pubblica per il conferimento di n. 1 assegno per collaborazione ad attivit di ricerca Bando AR N. 04/2014 del 15/04/2014 -Approvazione atti

    E-Print Network [OSTI]

    Di Pillo, Gianni

    .04.2011 e del 19.04.2011; VISTA la delibera del Consiglio del Dipartimento di Fisiologia e Farmacologia conservati presso il Dipartimento di Fisiologia e Farmacologia DISPONE Art.1 Sono approvati gli atti della I), presso il Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" di questa Universit per

  8. Selezione pubblica per il conferimento di n. 1 assegno per collaborazione ad attivit di ricerca Bando n. 01/2014 dell'11/02/2014 -Approvazione atti

    E-Print Network [OSTI]

    Di Pillo, Gianni

    Civitavecchia e destinata ad assegni di ricerca; VISTA la delibera del Consiglio del Dipartimento di Fisiologia; VISTI i verbali redatti dalla Commissione giudicatrice e conservati presso il Dipartimento di Fisiologia Fisiologia e Farmacologia "Vittorio Erspamer" di questa Universit per il settore scientifico disciplinare

  9. Selezione pubblica per il conferimento di n. 1 assegno per collaborazione ad attivit di ricerca Bando AR N. 05/2014 del 26/06/2014 -Approvazione atti

    E-Print Network [OSTI]

    Di Pillo, Gianni

    .04.2011 e del 19.04.2011; VISTA la delibera del Consiglio del Dipartimento di Fisiologia e Farmacologia conservati presso il Dipartimento di Fisiologia e Farmacologia DISPONE Art.1 Sono approvati gli atti della II), presso il Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" di questa Universit per

  10. Selezione pubblica per il conferimento di n. 1 assegno per collaborazione ad attivit di ricerca Bando AR N. 06/2014 del 25/07/2014 -Approvazione atti

    E-Print Network [OSTI]

    Di Pillo, Gianni

    .04.2011 e del 19.04.2011; VISTA la delibera del Consiglio del Dipartimento di Fisiologia e Farmacologia verbali redatti dalla Commissione giudicatrice e conservati presso il Dipartimento di Fisiologia e di ricerca annuale, rinnovabile, categoria B) tipologia I), presso il Dipartimento di Fisiologia e

  11. Selezione pubblica per il conferimento di n. 1 assegno per collaborazione ad attivit di ricerca Bando n. 10/2011-Approvazione atti

    E-Print Network [OSTI]

    Di Pillo, Gianni

    delibera del Consiglio del Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" del 23 settembre bando pubblicato il 28 settembre 2011; VISTA la delibera del Consiglio di Dipartimento di Fisiologia e giudicatrice e conservati presso il Dipartimento di Fisiologia e Farmacologia DISPONE Art.1 Sono approvati

  12. Selezione pubblica per il conferimento di n. 1 assegno per collaborazione ad attivit di ricerca Bando n. 01/2013 del 17 gennaio 2013 -Approvazione atti

    E-Print Network [OSTI]

    Di Pillo, Gianni

    .04.2011; VISTA la delibera del Consiglio del Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" del 16 pubblicato il 17 gennaio 2013; VISTA la delibera del Consiglio di Dipartimento di Fisiologia e Farmacologia presso il Dipartimento di Fisiologia e Farmacologia DISPONE Art.1 Sono approvati gli atti della

  13. Selezione pubblica per il conferimento di n. 1 assegno per collaborazione ad attivit di ricerca Bando n. 12/2011-Approvazione atti

    E-Print Network [OSTI]

    Di Pillo, Gianni

    delibera del Consiglio del Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" del 20 ottobre il 24 ottobre 2011; VISTA la delibera del Consiglio di Dipartimento di Fisiologia e Farmacologia presso il Dipartimento di Fisiologia e Farmacologia DISPONE Art.1 Sono approvati gli atti della

  14. Selezione pubblica per il conferimento di n. 1 assegno per collaborazione ad attivit di ricerca Bando AR N. 02/2014 del 14/02/2014 -Approvazione atti

    E-Print Network [OSTI]

    Di Pillo, Gianni

    Consiglio del Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" del 18 dicembre 2013 nella quale Fisiologia e Farmacologia DISPONE Art.1 Sono approvati gli atti della selezione pubblica per il di Fisiologia e Farmacologia "Vittorio Erspamer" di questa Universit per il settore scientifico

  15. Selezione pubblica per il conferimento di n. 1 assegno per collaborazione ad attivit di ricerca Bando AR N. 08/2014 del 17/09/2014 -Approvazione atti

    E-Print Network [OSTI]

    Di Pillo, Gianni

    .04.2011 e del 19.04.2011; VISTA la delibera del Consiglio del Dipartimento di Fisiologia e Farmacologia giudicatrice e conservati presso il Dipartimento di Fisiologia e Farmacologia DISPONE Art.1 Sono approvati, categoria B) tipologia I), presso il Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" di questa

  16. Selezione pubblica per il conferimento di n. 1 assegno per collaborazione ad attivit di ricerca Bando AR N. 10/2014 del 26/11/2014 -Approvazione atti

    E-Print Network [OSTI]

    Di Pillo, Gianni

    .04.2011 e del 19.04.2011; VISTA la delibera del Consiglio del Dipartimento di Fisiologia e Farmacologia conservati presso il Dipartimento di Fisiologia e Farmacologia DISPONE Art.1 Sono approvati gli atti della I), presso il Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" di questa Universit per

  17. Selezione pubblica per il conferimento di n. 1 assegno per collaborazione ad attivit di ricerca Bando n. 05/2013 del 29 luglio 2013 -Approvazione atti

    E-Print Network [OSTI]

    Di Pillo, Gianni

    .04.2011; VISTA la delibera del Consiglio del Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" del 26 conservati presso il Dipartimento di Fisiologia e Farmacologia DISPONE Art.1 Sono approvati gli atti della II), presso il Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" di questa Universit per

  18. Selezione pubblica per il conferimento di n. 1 assegno per collaborazione ad attivit di ricerca Bando AR N. 11/2014 del 28/11/2014 -Approvazione atti

    E-Print Network [OSTI]

    Di Pillo, Gianni

    .04.2011 e del 19.04.2011; VISTA la delibera del Consiglio del Dipartimento di Fisiologia e Farmacologia dalla Commissione giudicatrice e conservati presso il Dipartimento di Fisiologia e Farmacologia DISPONE annuale, rinnovabile, categoria B) tipologia II), presso il Dipartimento di Fisiologia e Farmacologia

  19. Selezione pubblica per il conferimento di n. 1 assegno per collaborazione ad attivit di ricerca Bando AR N. 07/2014 del 25/07/2014 -Approvazione atti

    E-Print Network [OSTI]

    Di Pillo, Gianni

    .04.2011 e del 19.04.2011; VISTA la delibera del Consiglio del Dipartimento di Fisiologia e Farmacologia verbali redatti dalla Commissione giudicatrice e conservati presso il Dipartimento di Fisiologia e di ricerca annuale, rinnovabile, categoria B) tipologia I), presso il Dipartimento di Fisiologia e

  20. Selezione pubblica per il conferimento di n. 1 assegno per collaborazione ad attivit di ricerca Bando n. 02/2011 del 4 aprile 2011 -Approvazione atti

    E-Print Network [OSTI]

    Di Pillo, Gianni

    . n. 21702; VISTA la delibera del Consiglio del Dipartimento di Fisiologia e Farmacologia "Vittorio Commissione giudicatrice e conservati presso il Dipartimento di Fisiologia e Farmacologia DISPONE Art.1 Sono, rinnovabile, categoria B) tipologia II), presso il Dipartimento di Fisiologia e Farmacologia "Vittorio

  1. Selezione pubblica per il conferimento di n. 1 assegno per collaborazione ad attivit di ricerca Bando n. 10/2013 del 20/12/2013 -Approvazione atti

    E-Print Network [OSTI]

    Di Pillo, Gianni

    , rispettivamente del 12.04.2011 e del 19.04.2011; VISTA la delibera del Consiglio del Dipartimento di Fisiologia e; VISTI i verbali redatti dalla Commissione giudicatrice e conservati presso il Dipartimento di Fisiologia Fisiologia e Farmacologia "Vittorio Erspamer" di questa Universit per il settore scientifico disciplinare

  2. Selezione pubblica per il conferimento di n. 1 assegno per collaborazione ad attivit di ricerca Bando AR N. 09/2014 del 17/09/2014 -Approvazione atti

    E-Print Network [OSTI]

    Di Pillo, Gianni

    .04.2011 e del 19.04.2011; VISTA la delibera del Consiglio del Dipartimento di Fisiologia e Farmacologia verbali redatti dalla Commissione giudicatrice e conservati presso il Dipartimento di Fisiologia e di ricerca annuale, rinnovabile, categoria B) tipologia II), presso il Dipartimento di Fisiologia e

  3. Selezione pubblica per il conferimento di n. 1 assegno per collaborazione ad attivit di ricerca Bando n. 07/2013 del 14 ottobre 2013 -Approvazione atti

    E-Print Network [OSTI]

    Di Pillo, Gianni

    .04.2011; VISTA la delibera del Consiglio del Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" del 27 conservati presso il Dipartimento di Fisiologia e Farmacologia DISPONE Art.1 Sono approvati gli atti della II), presso il Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" di questa Universit per

  4. Selezione pubblica per il conferimento di n. 1 assegno per collaborazione ad attivit di ricerca Bando AR N. 03/2014 del 15/04/2014 -Approvazione atti

    E-Print Network [OSTI]

    Di Pillo, Gianni

    .04.2011 e del 19.04.2011; VISTA la delibera del Consiglio del Dipartimento di Fisiologia e Farmacologia conservati presso il Dipartimento di Fisiologia e Farmacologia DISPONE Art.1 Sono approvati gli atti della I), presso il Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" di questa Universit per

  5. VISTO il D.P.R. n. 371 del 4 marzo 1982; VISTI i Decreti del Ministro dell'Universit e della Ricerca Scientifica e

    E-Print Network [OSTI]

    Milano-Bicocca, Universit

    'amministrazione, la finanza e la contabilit emanato con D.R. n. 3671 del 4 marzo 2002 registrato in pari data; VISTA elementi: - il codice e la denominazione del centro di costo; - il Consegnatario; - la data di arrivo dei costo non dotati di autonomia contabile e finanziaria propria (Istituti, Facolt, Centri, Biblioteca e

  6. Expression of low-, intermediate-, and high-affinity IL-2 receptors on B cell lines derived from patients with undifferentiated lymphoma of Burkitt's and non-Burkitt's types

    SciTech Connect (OSTI)

    Benjamin, D.; Rosolen, A.; Wormsley, S.B.; DeBault, L.E.; Colamonici, O.R. )

    1990-08-01

    IL-2 receptors on T cells exist in at least three forms which differ in their ligand-binding affinity. The low-affinity IL-2 receptor (IL-2R) consists of the 55-kDa Tac protein (p55 alpha), the intermediate-affinity site corresponds to the 70-kDa molecule (p70 beta), and the high-affinity IL-2R consists of a noncovalent heterodimeric structure involving both p55 alpha and p70 beta. We studied 24 B cell lines (8 EBV-negative and 16 EBV-positive) for IL-2R expression in the presence or absence of the tumor promoter, teleocidin. 125I-IL-2 radioreceptor binding assays and crosslinking studies demonstrated the sole expression of p55 alpha in EBV-negative cell lines only, whereas p55 alpha present in EBV-positive cell lines was always associated with p70 beta to construct high-affinity IL-2R. p70 beta was not detected in any of the EBV-negative cell lines, but was expressed on most of the EBV-positive cell lines (13 of 16). Our data also indicate that the expression of p55 alpha and p70 beta by radiolabeling correlates with their expression in flow cytometry, and that a large excess of p55 alpha is required to construct high-affinity IL-2R. Coexpression of p55 alpha and p70 beta on human B cells contributed to constructing high-affinity IL-2R hybrid complex as shown by rapid association rate contributed by p55 alpha and slow dissociation rate by p70 beta; teleocidin's ability to induce p55 alpha on cell lines which express p70 beta only, resulting in appearance of high-affinity IL-2R; and blocking p55 alpha by anti-Tac mAb in cell lines which constitutively express high-affinity IL-2R eliminated both high- and low-affinity components. The existence of low, intermediate, and high IL-2R on human B cells bears important future implications for understanding the mechanism of IL-2 signaling and the role of IL-2 in B cell activation, proliferation, and differentiation.

  7. Atomic moments in Mn2CoAl thin films analyzed by X-ray magnetic circular dichroism

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

    Jamer, M. E.; Assaf, B. A.; Sterbinsky, G. E.; Arena, D. A.; Heiman, D.

    2014-12-05

    Spin gapless semiconductors are known to be strongly affected by structural disorder when grown epitaxially as thin films. The magnetic properties of Mn2CoAl thin films grown on GaAs (001) substrates are investigated here as a function of annealing. This study investigates the atomic-specific magnetic moments of Mn and Co atoms measured through X-ray magnetic circular dichroism as a function of annealing and the consequent structural ordering. Results indicate that the structural distortion mainly affects the Mn atoms as seen by the reduction of the magnetic moment from its predicted value.

  8. Atomic moments in Mn2CoAl thin films analyzed by X-ray magnetic circular dichroism

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

    Jamer, M. [Northwestern Univ., Evanston, IL (United States). Dept. of Physics; Sterbinsky, G. [Brookhaven National Laboratory (BNL), Upton, NY (United States). Photon Sciences Directorate; Assaf, B. [Northwestern Univ., Evanston, IL (United States). Dept. of Physics; Arena, D. [Brookhaven National Laboratory (BNL), Upton, NY (United States). Photon Sciences Directorate; Heiman, D. [Northwestern Univ., Evanston, IL (United States). Dept. of Physics

    2014-12-07

    Spin gapless semiconductors are known to be strongly affected by structural disorder when grown epitaxially as thin films. The magnetic properties of Mn2CoAl thin films grown on GaAs (001) substrates are investigated here as a function of annealing. This study investigates the atomic-specific magnetic moments of Mn and Co atoms measured through X-ray magnetic circular dichroism as a function of annealing and the consequent structural ordering. The results indicate that the structural distortion mainly affects the Mn atoms as seen by the reduction of the magnetic moment from its predicted value. (auth)

  9. IL1{beta}-mediated Stromal COX-2 signaling mediates proliferation and invasiveness of colonic epithelial cancer cells

    SciTech Connect (OSTI)

    Zhu, Yingting; Tissue Tech Inc, Miami, FL 33173 ; Zhu, Min; Lance, Peter

    2012-11-15

    COX-2 is a major inflammatory mediator implicated in colorectal inflammation and cancer. However, the exact origin and role of COX-2 on colorectal inflammation and carcinogenesis are still not well defined. Recently, we reported that COX-2 and iNOS signalings interact in colonic CCD18Co fibroblasts. In this article, we investigated whether activation of COX-2 signaling by IL1{beta} in primary colonic fibroblasts obtained from normal and cancer patients play a critical role in regulation of proliferation and invasiveness of human colonic epithelial cancer cells. Our results demonstrated that COX-2 level was significantly higher in cancer associated fibroblasts than that in normal fibroblasts with or without stimulation of IL-1{beta}, a powerful stimulator of COX-2. Using in vitro assays for estimating proliferative and invasive potential, we discovered that the proliferation and invasiveness of the epithelial cancer cells were much greater when the cells were co-cultured with cancer associated fibroblasts than with normal fibroblasts, with or without stimulation of IL1{beta}. Further analysis indicated that the major COX-2 product, prostaglandin E{sub 2}, directly enhanced proliferation and invasiveness of the epithelial cancer cells in the absence of fibroblasts. Moreover, a selective COX-2 inhibitor, NS-398, blocked the proliferative and invasive effect of both normal and cancer associate fibroblasts on the epithelial cancer cells, with or without stimulation of IL-1{beta}. Those results indicate that activation of COX-2 signaling in the fibroblasts plays a major role in promoting proliferation and invasiveness of the epithelial cancer cells. In this process, PKC is involved in the activation of COX-2 signaling induced by IL-1{beta} in the fibroblasts.

  10. Toward Customizable Wi-Fi

    E-Print Network [OSTI]

    Li, Chi-Yu

    2015-01-01

    of Energy-Efficient Settings . . . . . . . . . . . . . .21 EERA: Energy-Efficient RateAn Energy Efficiency Perspective . . . . . . . . . . . . .

  11. RiverHeath Appleton, WI

    Broader source: Energy.gov [DOE]

    The goal of the project is to produce a closed loop neighborhood-wide geothermal exchange system using the river as the source of heat exchange.

  12. Toward Customizable Wi-Fi

    E-Print Network [OSTI]

    Li, Chi-Yu

    2015-01-01

    requirements for flows and mobile devices. Each is servedfor mobile applications and mobile devices is typicallydiverse requirements of mobile devices and applications in

  13. Toward Customizable Wi-Fi

    E-Print Network [OSTI]

    Li, Chi-Yu

    2015-01-01

    24 Dynamics of Energy-Efficient12 Energy Saving . . . . . . . . . . . . .21 EERA: Energy-Efficient Rate

  14. Toward Customizable Wi-Fi

    E-Print Network [OSTI]

    Li, Chi-Yu

    2015-01-01

    flow basis, while improving the energy efficiency of the 802.11n NIC for those battery-battery-constrained clients. The credit/debit mechanism: It determines which flows

  15. Eu3+ as a dual probe for the determination of IL anion donor power: A combined luminescence spectroscopic and electrochemical approach

    SciTech Connect (OSTI)

    Babai, Arash; Kopiec, Gabriel; Lackmann, Anastasia; Mallick, Bert; Pitula, Slawomir; Tang, Sifu; Mudring, Anja-Verena

    2014-04-01

    This work is aimed at giving proof that Eu(Tf2N)(3) (Tf2N = bis(trifluoromethanesulfonyl)amide) can act as both an optical and electrochemical probe for the determination of the Lewis acidity of an ionic liquid anion. For that reason the luminescence spectra and cyclic voltammograms of dilute solutions of Eu(Tf2N)(3) in various ionic liquids were investigated. The Eu2+/3+ redox potential in the investigated ILs can be related to the Lewis basicity of the IL anion. The IL cation had little influence. The lower the determined halfwave potential, the higher the IL anion basicity. The obtained ranking can be confirmed by luminescence spectroscopy where a bathochromic shift of the D-5(0) -> F-7(4) transition indicates a stronger Lewis basicity of the IL anion. (C) 2014 Published by Elsevier B.V.

  16. Structure of the unique SEFIR domain from human interleukin 17 receptor A reveals a composite ligand-binding site containing a conserved ?-helix for Act1 binding and IL-17 signaling

    SciTech Connect (OSTI)

    Zhang, Bing [Oklahoma State University, Stillwater, OK 74078 (United States); Liu, Caini; Qian, Wen [Lerner Research Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195 (United States); Han, Yue [Oklahoma State University, Stillwater, OK 74078 (United States); Li, Xiaoxia, E-mail: lix@ccf.org [Lerner Research Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195 (United States); Deng, Junpeng, E-mail: lix@ccf.org [Oklahoma State University, Stillwater, OK 74078 (United States)

    2014-05-01

    Crystal structure of the SEFIR domain from human IL-17 receptor A provides new insights into IL-17 signaling. Interleukin 17 (IL-17) cytokines play a crucial role in mediating inflammatory and autoimmune diseases. A unique intracellular signaling domain termed SEFIR is found within all IL-17 receptors (IL-17Rs) as well as the key adaptor protein Act1. SEFIR-mediated proteinprotein interaction is a crucial step in IL-17 cytokine signaling. Here, the 2.3 resolution crystal structure of the SEFIR domain of IL-17RA, the most commonly shared receptor for IL-17 cytokine signaling, is reported. The structure includes the complete SEFIR domain and an additional ?-helical C-terminal extension, which pack tightly together to form a compact unit. Structural comparison between the SEFIR domains of IL-17RA and IL-17RB reveals substantial differences in protein topology and folding. The uniquely long insertion between strand ?C and helix ?C in IL-17RA SEFIR is mostly well ordered, displaying a helix (?CC?{sub ins}) and a flexible loop (CC?). The DD? loop in the IL-17RA SEFIR structure is much shorter; it rotates nearly 90 with respect to the counterpart in the IL-17RB SEFIR structure and shifts about 12 to accommodate the ?CC?{sub ins} helix without forming any knots. Helix ?C was identified as critical for its interaction with Act1 and IL-17-stimulated gene expression. The data suggest that the heterotypic SEFIRSEFIR association via helix ?C is a conserved and signature mechanism specific for IL-17 signaling. The structure also suggests that the downstream motif of IL-17RA SEFIR together with helix ?C could provide a composite ligand-binding surface for recruiting Act1 during IL-17 signaling.

  17. Penetration depth and absorption mechanisms of spin currents in Ir{sub 20}Mn{sub 80} and Fe{sub 50}Mn{sub 50} polycrystalline films by ferromagnetic resonance and spin pumping

    SciTech Connect (OSTI)

    Merodio, P.; Ghosh, A.; Lemonias, C.; Gautier, E.; Ebels, U.; Chshiev, M.; Ba, H. E-mail: helene.bea@cea.fr; Baltz, V. E-mail: helene.bea@cea.fr

    2014-01-20

    Spintronics relies on the spin dependent transport properties of ferromagnets (Fs). Although antiferromagnets (AFs) are used for their magnetic properties only, some fundamental F-spintronics phenomena like spin transfer torque, domain wall motion, and tunnel anisotropic magnetoresistance also occur with AFs, thus making AF-spintronics attractive. Here, room temperature critical depths and absorption mechanisms of spin currents in Ir{sub 20}Mn{sub 80} and Fe{sub 50}Mn{sub 50} are determined by F-resonance and spin pumping. In particular, we find room temperature critical depths originating from different absorption mechanisms: dephasing for Ir{sub 20}Mn{sub 80} and spin flipping for Fe{sub 50}Mn{sub 50}.

  18. Proc. of the Fourth World Conference on Engineering Education; St. Paul, MN, October 15-20, 1995 Proceedings of the World Conference on Engineering Education, Minneapolis, MN, October 1995 11

    E-Print Network [OSTI]

    Lamancusa, John S.

    components of this integration. Two different Learning Factory paradigms were developed in order to adapt, Minneapolis, MN, October 1995 22 blending of activities as a necessary means of anchoring both the knowledge

  19. ASHRAE 2000 Annual Meeting, June 24-28, 2000, Minneapolis, MN, and published in ASHRAE Transactions, 106(2) 2000.

    E-Print Network [OSTI]

    LBNL-44422 Mo-420 ASHRAE 2000 Annual Meeting, June 24-28, 2000, Minneapolis, MN, and published in ASHRAE Transactions, 106(2) 2000. This work was supported by the Assistant Secretary for Energy

  20. Synthesis and Electrochemical Properties of Monoclinic LiMnBO[subscript 3] as a Li Intercalation Material

    E-Print Network [OSTI]

    Kim, Jae Chul

    We investigated the structural stability and electrochemical properties of LiMnBO3 in the hexagonal and monoclinic form with ab initio computations and, for the first time, report electrochemical data on monoclinic ...

  1. Synthesis and Electrochemical Properties of Monoclinic LiMnBO[subscript 3] as a Li Intercalation Material

    E-Print Network [OSTI]

    Kim, Jae Chul

    We investigated the structural stability and electrochemical properties of LiMnBO[subscript 3] in the hexagonal and monoclinic form with ab initio computations and, for the first time, report electrochemical data on ...

  2. Heat capacity of the site-diluted spin dimer system Ba?(Mn1-xVx)?O?

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

    Samulon, E. C.; Shapiro, M. C.; Fisher, I. R.

    2011-08-01

    Heat-capacity and susceptibility measurements have been performed on the diluted spin dimer compound Ba?(Mn1-xVx)?O?. The parent compound Ba?Mn?O? is a spin dimer system based on pairs of antiferromagnetically coupled S=1, 3d Mn?? ions such that the zero-field ground state is a product of singlets. Substitution of nonmagnetic S=0, 3d? V?? ions leads to an interacting network of unpaired Mn moments, the low-temperature properties of which are explored in the limit of small concentrations 0?x?0.05. The zero-field heat capacity of this diluted system reveals a progressive removal of magnetic entropy over an extended range of temperatures, with no evidence for a phase transition. The concentration dependence does not conform to expectations for a spin-glass state. Rather, the data suggest a low-temperature random singlet phase, reflecting the hierarchy of exchange energies found in this system.

  3. Frances Marcus Lewis, RN, MN, PhD, FAAN Professor, Department of Family & Child Nursing, University of Washington

    E-Print Network [OSTI]

    Brent, Roger

    of Washington Frances Marcus Lewis, RN, MN, PhD, FAAN is a Professor in the Department of Family& Child Nursing at the University of Washington, sits as the University of Washington Medical Center Professor of Nursing Leadership

  4. Mn abundances in the stars of the Galactic disc with metallicities -1.0 < [Fe/H] < 0.3

    E-Print Network [OSTI]

    Mishenina, T; Pignatari, M; Thielemann, F -K; Korotin, S A

    2015-01-01

    In this work we present and discuss the observations of the Mn abundances for 247 FGK dwarfs, located in the Galactic disc with metallicity -1supernovae. We confirm the basel...

  5. Thermoelectric properties of nano-meso-micro ?-MnO? powders as a function of electrical resistance

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

    Hedden, Morgan; Francis, Nick; Haraldsen, Jason T.; Ahmed, Towfiq; Constantin, Costel

    2015-07-15

    Particle sizes of manganese oxide (?-MnO?) powders were modified by using a mortar and pestle ground method for period of times that varied between 1560 min. Particle size versus ground time clearly shows the existence of a size-induced regime transition (i.e., regime I and II). Thermoelectric properties of ?-MnO? powders as a function of electrical resistance in the range of RP = 10 - 80? were measured. Based on the data presented, we propose a model for the ?-MnO? system in which nanometer-scale MnO? crystallites bond together through weak van der Waals forces to form larger conglomerates that span inmoresize from nanometer to micrometer scale.less

  6. Thermoelectric properties of nano-meso-micro ?-MnO? powders as a function of electrical resistance

    SciTech Connect (OSTI)

    Hedden, Morgan; Francis, Nick; Haraldsen, Jason T.; Ahmed, Towfiq; Constantin, Costel

    2015-07-15

    Particle sizes of manganese oxide (?-MnO?) powders were modified by using a mortar and pestle ground method for period of times that varied between 1560 min. Particle size versus ground time clearly shows the existence of a size-induced regime transition (i.e., regime I and II). Thermoelectric properties of ?-MnO? powders as a function of electrical resistance in the range of RP = 10 - 80? were measured. Based on the data presented, we propose a model for the ?-MnO? system in which nanometer-scale MnO? crystallites bond together through weak van der Waals forces to form larger conglomerates that span in size from nanometer to micrometer scale.

  7. Growth optimization and structural analysis for ferromagnetic Mn-doped ZnO layers deposited by radio frequency magnetron sputtering

    SciTech Connect (OSTI)

    Abouzaid, M.; Ruterana, P.; Liu, C.; Morkoc, H. [SIFCOM UMR 6176 CNRS-ENSICAEN, 6 Boulevard du Marechal Juin, 14050 Caen Cedex (France); Department of Electrical Engineering, Virginia Commonwealth University, Richmond Virginia 23284 (United States)

    2006-06-01

    The effect of the deposition temperature on the crystalline quality of (Zn,Mn)O is investigated in thin films prepared by radio frequency magnetron sputtering on c-plane sapphire and GaN substrates. The layers are made of a 0.5 {mu}m Mn-doped layer towards the surface on top of a 150 nm pure ZnO buffer. Depending on the deposition temperature, the layers can exhibit a columnar structure; the adjacent domains are rotated from one another by 90 deg. , putting [1010] and [1120] directions face to face. At high Mn concentration the columnar structure is blurred by the formation of Mn rich precipitates. Only one variety of domains is observed at an optimal deposition temperature of 500 deg. C: they are slightly rotated around the [0001] axis (mosaic growth) and bounded by threading dislocations.

  8. Disordered electronic and magnetic systems - transition metal (Mn) and rare earth (Gd) doped amorphous group IV semiconductors (C, Si, Ge)

    E-Print Network [OSTI]

    Zeng, Li

    2007-01-01

    for semiconductor spintronics. e Nature Phys. , 3(3):153,and D. M. Treger. Spintronics: a spin-based electronicsa test bed for simple spintronic devices. (In, Mn)As and (

  9. Compressional Behavior of Bulk and Nanorod LiMn[subscript 2]O[subscript 4] under Nonhydrostatic Stress

    SciTech Connect (OSTI)

    Lin, Yu; Yang, Yuan; Ma, Hongwei; Cui, Yi; Mao, Wendy L. (Stanford); (SLAC)

    2011-09-20

    We studied the effect of pressure on LiMn{sub 2}O{sub 4} commercial powders and well-characterized nanorods using angle-dispersive synchrotron X-ray diffraction (XRD) in diamond anvil cells and found that spinel LiMn{sub 2}O{sub 4} is extremely sensitive to deviatoric stress induced by external applied pressure. Under nonhydrostatic conditions, bulk LiMn{sub 2}O{sub 4} underwent an irreversible phase transformation at pressures as low as 0.4 GPa from a cubic Fd-3m to tetragonal I4{sub 1}/amd structure driven by the Jahn-Teller effect. In contrast, bulk LiMn{sub 2}O{sub 4} under hydrostatic conditions experienced a reversible structural transformation beginning at approximately 11 GPa. Well-characterized LiMn{sub 2}O{sub 4} nanorods with an average diameter of 100-150 nm and an average length of 1-2 {micro}m were investigated under the same experimental conditions and showed a similar structural behavior as the bulk material confirming that LiMn{sub 2}O{sub 4} displays an extremely sensitive structural response to deviatoric stress. Scanning electron microscope (SEM) images of the samples especially the nanorods that were recovered from high pressure demonstrated a link between the changing morphology of the materials and the origin of the phase transition. We also found that nanostructured materials can accommodate more stress compared to their bulk counterparts. Our comparative study of bulk and nanorod LiMn{sub 2}O{sub 4} improves our understanding of their fundamental structural and mechanical properties, which can provide guidance for applied battery technology. In addition, LiMn{sub 2}O{sub 4} represents a strongly correlated system, whose structural, electronic, and magnetic properties at high pressure are of broad interest for fundamental chemistry and condensed matter physics.

  10. Abundance analysis of SB2 binary stars with HgMn primaries

    E-Print Network [OSTI]

    T. Ryabchikova

    1998-05-06

    We present a short review of the abundances in the atmospheres of SB2 systems with Mercury-Manganese (HgMn) primaries. Up to now a careful study has been made for both components of 8 out of 17 known SB2 binaries with orbital periods shorter than 100 days and mass ratio ranging from 1.08 to 2.2. For all eight systems we observe a lower Mn abundance in the secondary's atmospheres than in the primary's. Significant difference in the abundances is also found for some peculiar elements such as Ga, Xe, Pt. All secondary stars with effective temperatures less than 10000 K show abundance characteristics typical of the metallic-line stars.

  11. Structural, elastic, electronic, magnetic and vibrational properties of CuCoMnGa under pressure

    SciTech Connect (OSTI)

    ?yigr, Ahmet; U?ur, ?ule

    2014-10-06

    First principles calculations for the structural, electronic, elastic and phonon properties of the cubic quaternary heusler alloy CuCoMnGa on pressure have been reported by density functional theory (DFT) within generalized gradient approximation (GGA). The calculated values of the elastic constants were used for estimations of the Debye temperatures, the bulk modulus, the shear modulus, the young modulus E, the poisson's ratio ? and the B/G ratio. The elastic constants satisfy all of the mechanical stability criteria. The electronic structures of the ferromagnetic configuration for CuCoMnGa have a metallic character. The estimated magnetic moment per formula unit is 3.76 ?{sub B}. The phonon dispersion is studied using the supercell approach, and the stable nature at 0.2 GPa pressure is observed.

  12. Low temperature magnetic properties of magnesium substituted YbMnO{sub 3}

    SciTech Connect (OSTI)

    Sattibabu, Bhumireddi Bhatnagar, Anil K. Mohan, Dasari Das, Dibakar Sundararaman, Mahadevan; Siruguri, Vasudeva; Rayaprol, Sudhindra

    2014-04-24

    Structural and magnetic properties of polycrystalline Yb{sub 1?x}Mg{sub x}MnO{sub 3} (x = 0, 0.05 and 0.10) hexagonal compounds prepared by solid state method, have been studied. The structural analyses of the samples were carried out by Rietveld analysis of neutron diffraction data. With increasing Mg content, we find that the lattice parameter a decreases and c increases whereas the overall Mn-O bond length decreases. Magnetization measured as a function of magnetic field at 2.5 K exhibits hysteresis, which is attributed to ferromagnetic like ordering of Yb{sup 3+} sublattice. Temperature dependence of ac magnetic susceptibility, ?{sub ac}(T), shows no signature of spin-glass behavior. ?(T) exhibits a sudden increase at low temperatures which is due to ordering of Yb{sup 3+} sublattice.

  13. Extrinsic anomalous Hall effect in epitaxial Mn{sub 4}N films

    SciTech Connect (OSTI)

    Meng, M.; Wu, S. X. Ren, L. Z.; Zhou, W. Q.; Wang, Y. J.; Wang, G. L.; Li, S. W.

    2015-01-19

    Anomalous Hall effect (AHE) in ferrimagnetic Mn{sub 4}N epitaxial films grown by molecular-beam epitaxy is investigated. The longitudinal conductivity ?{sub xx} is within the superclean regime, indicating Mn{sub 4}N is a highly conducting material. We further demonstrate that the AHE signal in 40-nm-thick films is mainly due to the extrinsic contributions based on the analysis fitted by ?{sub AH}=a??{sub xx0}+b?{sub xx}{sup 2} and ?{sub AH}??{sub xx}. Our study not only provide a strategy for further theoretical work on antiperovskite manganese nitrides but also shed promising light on utilizing their extrinsic AHE to fabricate spintronic devices.

  14. Magnetochromic effect in multiferroic R In 1 ? x Mn x O 3 ( R = Tb , Dy)

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

    Chen, P.; Holinsworth, B. S.; O'Neal, K. R.; Brinzari, T. V.; Mazumdar, D.; Topping, C. V.; Luo, X.; Cheong, S.-W.; Singleton, J.; McGill, S.; et al

    2015-05-26

    We combined high field magnetization and magneto-optical spectroscopy to investigate spin-charge coupling in Mn-substituted rare-earth indium oxides of chemical formula RIn??xMnxO? (R=Tb, Dy). The edge states, on-site Mn?d to d excitations, and rare-earth f-manifold excitations all track the magnetization energy due to dominant Zeeman interactions. The field-induced modifications to the rare-earth excitations are quite large because spin-orbit coupling naturally mixes spin and charge, suggesting that the next logical step in the design strategy should be to bring spin-orbit coupling onto the trigonal bipyramidal chromophore site with a 4 or 5d center.

  15. What is the valence of Mn in Ga1-xMnxN?

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

    Berlijn, Tom; Jarrell, Mark; Nelson, Ryky; Ku, Wei; Moreno, Juana

    2015-11-04

    Motivated by the potential high Curie temperature of Ga1-xMnxN, we investigate the controversial Mn valence in this diluted magnetic semiconductor. From a first-principles Wannier-function analysis of the high energy Hilbert space, we find unambiguously the Mn valence to be close to 2+(d5), but in a mixed spin configuration with average magnetic moments of 4B. By integrating out high-energy degrees of freedom differently, we further demonstrate the feasibility of both effective d4 and d5 descriptions. These two descriptions offer simple pictures for local and extended properties of the system, and highlight the dual nature of its doped hole. Specifically, in themoreeffective d5 description, we demonstrate novel physical effects absent in previous studies. Thus, our derivation highlights the richness of low-energy sectors in interacting many-body systems and the generic need for multiple effective descriptions.less

  16. Magnetochromic effect in multiferroic R In 1 ? x Mn x O 3 ( R = Tb , Dy)

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

    Chen, P.; Holinsworth, B. S.; O'Neal, K. R.; Brinzari, T. V.; Mazumdar, D.; Topping, C. V.; Luo, X.; Cheong, S.-W.; Singleton, J.; McGill, S.; Musfeldt, J. L.

    2015-05-01

    We combined high field magnetization and magneto-optical spectroscopy to investigate spin-charge coupling in Mn-substituted rare-earth indium oxides of chemical formula RIn??xMnxO? (R=Tb, Dy). The edge states, on-site Mn?d to d excitations, and rare-earth f-manifold excitations all track the magnetization energy due to dominant Zeeman interactions. The field-induced modifications to the rare-earth excitations are quite large because spin-orbit coupling naturally mixes spin and charge, suggesting that the next logical step in the design strategy should be to bring spin-orbit coupling onto the trigonal bipyramidal chromophore site with a 4 or 5d center.

  17. Three very young HgMn stars in the Orion OB1 Association

    E-Print Network [OSTI]

    Vincent M. Woolf; David L. Lambert

    1999-05-18

    We report the detection of three mercury-manganese stars in the Orion OB1 association. HD 37886 and BD-0 984 are in the approximately 1.7 million year old Orion OB1b. HD 37492 is in the approximately 4.6 million year old Orion OB1c. Orion OB1b is now the youngest cluster with known HgMn star members. This places an observational upper limit on the time scale needed to produce the chemical peculiarities seen in mercury-manganese stars, which should help in the search for the cause or causes of the peculiar abundances in HgMn and other chemically peculiar upper main sequence stars.

  18. Il Dipartimento di Architettura e Progetto DiAP della Sapienza organizza un Workshop di progettazione riservato agli studenti e ai dottorandi delle facolt di architettura e di inge-

    E-Print Network [OSTI]

    Di Pillo, Gianni

    "Summer Field Studio 2011 in Teheran" è la ristruttu- razione di un'area urbana di Teheran, il quartiere

  19. Homogeneity testing and quantitative analysis of manganese (Mn) in vitrified Mn-doped glasses by laser-induced breakdown spectroscopy (LIBS)

    SciTech Connect (OSTI)

    Unnikrishnan, V. K.; Nayak, Rajesh; Kartha, V. B.; Santhosh, C. E-mail: unnikrishnan.vk@manipal.edu; Sonavane, M. S.; Yeotikar, R. G.; Shah, M. L.; Gupta, G. P.; Suri, B. M.

    2014-09-15

    Laser-induced breakdown spectroscopy (LIBS), an atomic emission spectroscopy method, has rapidly grown as one of the best elemental analysis techniques over the past two decades. Homogeneity testing and quantitative analysis of manganese (Mn) in manganese-doped glasses have been carried out using an optimized LIBS system employing a nanosecond ultraviolet Nd:YAG laser as the source of excitation. The glass samples have been prepared using conventional vitrification methods. The laser pulse irradiance on the surface of the glass samples placed in air at atmospheric pressure was about 1.710{sup 9} W/cm{sup 2}. The spatially integrated plasma emission was collected and imaged on to the spectrograph slit using an optical-fiber-based collection system. Homogeneity was checked by recording LIBS spectra from different sites on the sample surface and analyzing the elemental emission intensities for concentration determination. Validation of the observed LIBS results was done by comparison with scanning electron microscope- energy dispersive X-ray spectroscopy (SEM-EDX) surface elemental mapping. The analytical performance of the LIBS system has been evaluated through the correlation of the LIBS determined concentrations of Mn with its certified values. The results are found to be in very good agreement with the certified concentrations.

  20. Strain-induced modification in the magnetic properties of Mn{sub 5}Ge{sub 3} thin films

    SciTech Connect (OSTI)

    Dung, Dang Duc [Department of Physics and EHSRC, University of Ulsan, Ulsan 680-749 (Korea, Republic of) [Department of Physics and EHSRC, University of Ulsan, Ulsan 680-749 (Korea, Republic of); Department of General Physics, School of Engineering Physics, Hanoi University of Science and Technology, 1 Dai Co Viet Road, Hanoi (Viet Nam); Odkhuu, Dorj; Cheol Hong, Soon; Cho, Sunglae [Department of Physics and EHSRC, University of Ulsan, Ulsan 680-749 (Korea, Republic of)] [Department of Physics and EHSRC, University of Ulsan, Ulsan 680-749 (Korea, Republic of); Thanh Vinh, Le [Aix Marseille Universit, CNRS, CINaM-UMR 7325, 13288 Marseille (France)] [Aix Marseille Universit, CNRS, CINaM-UMR 7325, 13288 Marseille (France)

    2013-08-21

    Epitaxial ferromagnetic Mn{sub 5}Ge{sub 3} thin films were stabilized on GaSb(001) and GaAs(001) substrates using molecular beam epitaxy. Compared to bulk Mn{sub 5}Ge{sub 3} materials, an enhancement of the Curie temperature above 350 K and about 320 K was observed for Mn{sub 5}Ge{sub 3}/GaAs(001) and Mn{sub 5}Ge{sub 3}/GaSb(001) heterostructures, respectively. The magnetization was found to decrease from 323 to 245 emu/cm{sup 3} for films grown on GaSb(001) and GaAs(001). Anomalous Hall effect measurements provide evidence of the strain-induced large spin polarization from density-functional study. Furthermore, our calculated results in bulk Mn{sub 5}Ge{sub 3} under strain indicate that the strain is the origin of different physical properties of Mn{sub 5}Ge{sub 3} grown on different substrates.

  1. Epitaxial {tau} phase MnAl thin films on MgO (001) with thickness-dependent magnetic anisotropy

    SciTech Connect (OSTI)

    Cui Yishen; Chen Wei [Department of Physics, University of Virginia, Charlottesville, Virginia 22904 (United States); Yin Wenjing; Lu Jiwei [Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904 (United States); Wolf, Stuart A. [Department of Physics, University of Virginia, Charlottesville, Virginia 22904 (United States); Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904 (United States)

    2011-11-15

    In this study, ferromagnetic MnAl films were prepared by alternating Al/Mn quasi-monolayer deposition using a novel biased target ion beam deposition (BTIBD) technique. XRD results showed that the magnetic {tau} phase was well formed in MnAl thin films ({approx}10 nm), which grew epitaxially on single crystal MgO (001) substrates. The optimized saturation magnetization was {approx}394 emu/cc. Furthermore, we observed a thickness-dependent uniaxial anisotropy in ferromagnetic MnAl films, which was attributed to the change of the tetragonal lattice distortion as a function of film thickness. The relationship between the film thicknesses and saturation magnetizations suggested the existence of a magnetically dead layer {approx}2.7 nm with an extrapolated saturation moment around 523 emu/cc ({approx}1.90 {mu}{sub B}/Mn). This value has exceeded the experimental value in bulk materials and is close to the theoretically predicted magnetization ({approx}1.975 {mu}{sub B}/Mn).

  2. Mn$_3$O$_4$(001) film growth on Ag(001) - a systematic study using NEXAFS, STM, and LEED

    E-Print Network [OSTI]

    Gillmeister, Konrad; Shantyr, Roman; Trautmann, Martin; Meinel, Klaus; Chass, Angelika; Schindler, Karl-Michael; Neddermeyer, Henning; Widdra, Wolf

    2015-01-01

    The film growth of Mn$_3$O$_4$(001) films on Ag(001) up to film thicknesses of almost seven unit cells of Mn$_3$O$_4$ has been monitored using a complementary combination of near-edge X-ray absorption fine structure spectroscopy (NEXAFS), scanning tunneling microscopy (STM), and low-energy electron diffraction (LEED). The oxide films have been prepared by molecular beam epitaxy. Using NEXAFS, the identity of the Mn oxide has clearly been determined as Mn$_3$O$_4$. For the initial stages of growth, oxide islands with p(2$\\times$1) and p(2$\\times$2) structures are formed, which are embedded into the substrate. For Mn$_3$O$_4$ coverages up to 1.5 unit cells a p(2$\\times$1) structure of the films is visible in STM and LEED. Further increase of the thickness leads to a phase transition of the oxide films resulting in an additional c(2$\\times$2) structure with a 45$^\\circ$ rotated atomic pattern. The emerging film structures are discussed on the basis of a sublayer model of the Mn$_3$O$_4$ spinel unit cell. While t...

  3. Preparation and characterization of nanostructured NiO/MnO{sub 2} composite electrode for electrochemical supercapacitors

    SciTech Connect (OSTI)

    Liu Enhui Li Wen; Li Jian; Meng Xiangyun; Ding Rui; Tan Songting

    2009-05-06

    Nanostructured nickel-manganese oxides composite was prepared by the sol-gel and the chemistry deposition combination new route. The surface morphology and structure of the composite were characterized by scanning electron microscope and X-ray diffraction. The as-synthesized NiO/MnO{sub 2} samples exhibit higher surface area of 130-190 m{sup 2} g{sup -1}. Cyclic voltammetry and galvanostatic charge/discharge measurements were applied to investigate the electrochemical performance of the composite electrodes with different ratios of NiO/MnO{sub 2}. When the mass ratio of MnO{sub 2} and NiO in composite material is 80:20, the specific capacitance value of NiO/MnO{sub 2} calculated from the cyclic voltammetry curves is 453 F g{sup -1}, for pure NiO and MnO{sub 2} are 209, 330 F g{sup -1} in 6 mol L{sup -1} KOH electrolyte and at scan rate of 10 mV s{sup -1}, respectively. The specific capacitance of NiO/MnO{sub 2} electrode is much larger than that of each pristine component. Moreover, the composite electrodes showed high power density and stable electrochemical properties.

  4. Electrical gating effects on the magnetic properties of (Ga,Mn)As diluted magnetic semiconductors

    E-Print Network [OSTI]

    Owen, Man Hon Samuel

    2010-11-16

    . . . . . . . . . . . . . . . . . . . . . . . . . . 62 3.3.1 Cryogenic systems . . . . . . . . . . . . . . . . . . . . . . . . 62 IV 3.3.2 Electrical measurements . . . . . . . . . . . . . . . . . . . . . 63 Resistance vs. temperature . . . . . . . . . . . . . . . . . . . . 64 Magnetic field sweeps... reduces the tendency toward spin-glass freezing. In fact, for a Background 18 Figure 2.5: Magnetization M as a function of magnetic field H for Ga0.97Mn0.03As thin films, measured at 55 K by SQUID for sample No. 1 at the top panel and sample No. 2...

  5. Magnetism in La?O?(Fe??xMnx)?Se? tuned by Fe/Mn ratio

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

    Lei, Hechang; Bozin, Emil S.; Llobet, A.; Ivanovski, V.; Koteski, V.; Belosevic-Cavor, J.; Cekic, B.; Petrovic, C.

    2012-09-01

    We report the evolution of structural and magnetic properties in La?O?(Fe??xMnx)?Se?. Heat capacity and bulk magnetization indicate an increased ferromagnetic component of the long-range magnetic order and possible increased degree of frustration. Atomic disorder on Fe(Mn) sites suppresses the temperature of the long-range order whereas intermediate alloys show a rich magnetic phase diagram.

  6. MN Lup: X-RAYS FROM A WEAKLY ACCRETING T TAURI STAR

    SciTech Connect (OSTI)

    Guenther, H. M.; Wolk, S. J.; Wolter, U.; Robrade, J.

    2013-07-01

    Young T Tauri stars (TTS) are surrounded by an accretion disk, which over time disperses due to photoevaporation, accretion, and possibly planet formation. The accretion shock on the central star produces an UV/optical veiling continuum, line emission, and X-ray signatures. As the accretion rate decreases, the impact on the central star must change. In this article we study MN Lup, a young star where no indications of a disk are seen in IR observations. We present XMM-Newton and VLT/UVES observations, some of them taken simultaneously. The X-ray data show that MN Lup is an active star with L{sub X} /L{sub bol} close to the saturation limit. However, we find high densities (n{sub e} > 3 Multiplication-Sign 10{sup 10} cm{sup -3}) in the X-ray grating spectrum. This can be well fitted using an accretion shock model with an accretion rate of 2 Multiplication-Sign 10{sup -11} M{sub Sun} yr{sup -1}. Despite the simple H{alpha} line profile which has a broad component, but no absorption signatures as typically seen on accreting TTS, we find rotational modulation in Ca II K and in photospheric absorption lines. These line profile modulations do not clearly indicate the presence of a localized hot accretion spot on the star. In the H{alpha} line we see a prominence in absorption about 2R{sub *} above the stellar surface-the first of its kind on a TTS. MN Lup is also the only TTS where accretion is seen, but no dust disk is detected that could fuel it. We suggest that MN Lup presents a unique and short-lived state in the disk evolution. It may have lost its dust disk only recently and is now accreting the remaining gas at a very low rate.

  7. Solar DEM Models : A solar image in color band b, mn pixels,

    E-Print Network [OSTI]

    Wolfe, Patrick J.

    Solar DEM Models : A solar image in color band b, mn pixels, containing a particular solar feature, for t = 1, 2, . . . , T. btM sianFieldRandomGaus I M I I bbb T t bbtt bbb bb 2 1 2 )( #12;Solar DEM.bI : the measure error of the ith row and jth column pixel of the certain image in color band b. ijbe #12;Solar DEM

  8. Thermoelectric study of crossroads material MnTe via sulfur doping

    SciTech Connect (OSTI)

    Xie, Wenjie Populoh, Sascha; Sagarna, Leyre; Trottmann, Matthias; Ga??zka, Krzysztof; Xiao, Xingxing; Liu, Yufei; He, Jian; Weidenkaff, Anke

    2014-03-14

    Here, we report thermoelectric study of crossroads material MnTe via iso-electronic doping S on the Te-site. MnTe{sub 1-x}S{sub x} samples with nominal S content of x?=?0.00, 0.05, and 0.10 were prepared using a melt-quench method followed by pulverization and spark plasma sintering. The X-ray powder diffraction, scanning electron microscopy, and ZAF-corrected compositional analysis confirmed that S uniformly substitutes Te up to slightly over 2%. A higher content of S in the starting materials led to the formation of secondary phases. The thermoelectric properties of MnTe{sub 1-x}S{sub x} samples were characterized by means of Seebeck coefficient, electrical conductivity, and thermal conductivity measurements from 300?K to 773?K. Furthermore, Hall coefficient measurements and a single parabolic band model were used to help gain insights on the effects of S-doping on the scattering mechanism and the carrier effective mass. As expected, S doping not only introduced hole charge carriers but also created short-range defects that effectively scatter heat-carrying phonons at elevated temperatures. On the other hand, we found that S doping degraded the effective mass. As a result, the ZT of MnTe{sub 0.9}S{sub 0.1} was substantially enhanced over the pristine sample near 400?K, while the improvement of ZT became marginal at elevated temperatures. A ZT???0.65 at 773?K was obtained in all three samples.

  9. Redox Active Layer-by-Layer Structures containing MnO2 Nanoparticles

    SciTech Connect (OSTI)

    Bazito, Fernanda; O'Brien, Robert; Buttry, Daniel A.

    2005-02-01

    Nanoscale materials provide unique properties that will enable new technologies and enhance older ones. One area of intense activity in which nanoscale materials are being used is in the development of new functional materials for battery applications. This effort promises superior materials with properties that circumvent many of the problems associated with traditional battery materials. Previously we have worked on several approaches for using nanoscale materials for application as cathode materials in rechargeable Li batteries. Our recent work has focused on synthesizing MnO2 nanoparticles and using these in layer-by-layer (LbL) structures to probe the redox properties of the nanoparticles. We show that the aqueous colloidal nanoparticles produced by butanol reduction of tetramethylammonium permanganate can be trapped in thin films using a layer-by-layer deposition approach, and that these films are both redox active and exhibit kinetically facile electrochemical responses. We show cyclic voltammetry of MnO2 colloidal nanoparticles entrapped in a LbL thin film at an ITO electrode surface using poly(diallyldimethylammonium chloride) (PDDA). CV experiments demonstrate that Li+ insertion accompanies Mn(IV) reduction in LiClO4 supporting electrolytes, and that reduction is hindered in supporting electrolytes containing only tetrabutylammonium cations. We also show that electron propagation through multilayer films is facile, suggesting that electrons percolate through the films via electron exchange between nanoparticles.

  10. Magnetization-steps in Y?CoMnO? double perovskite: The role of antisite disorder

    SciTech Connect (OSTI)

    Nair, Harikrishnan S. Xiao, Yinguo; Brckel, Th.; Cherian, Dona; Elizabeth, Suja; Hansen, Thomas; Chatterji, Tapan

    2014-09-28

    Antisite disorder is observed to have significant impact on the magnetic properties of the double perovskite YCoMnO? which has been recently identified as a multiferroic. A paramagnetic-ferromagnetic phase transition occurs in this material at Tc ? 75 K. At 2 K, it displays a strong ferromagnetic hysteresis with a significant coercive field of Hc ? 15 kOe. Sharp steps are observed in the hysteresis curves recorded below 8 K. In the temperature range 2 K ? T ? 5 K, the hysteresis loops are anomalous as the virgin curve lies outside the main loop. The field-cooling conditions as well as the rate of field-sweep are found to influence the steps. Quantitative analysis of the neutron diffraction data shows that at room temperature, Y?CoMnO? consists of 62% of monoclinic P2?/n with nearly 70% antisite disorder and 38% Pnma. The bond valence sums indicate the presence of other valence states for Co and Mn which arise from disorder. We explain the origin of steps by using a model for pinning of magnetization at the antiphase boundaries created by antisite disorder. The steps in magnetization closely resemble the martensitic transformations found in intermetallics and display first-order characteristics as revealed in the Arrott's plots.

  11. Correlating Local Structure with Electrochemical Activity in Li2MnO3

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

    Nanda, Jagjit; Sacci, Robert L.; Veith, Gabriel M.; Dixit, Hemant M.; Cooper, Valentino R.; Pezeshki, Alan M.; Ruther, Rose E.

    2015-07-31

    Li2MnO3 is of interest as one component of the composite lithium-rich oxides, which are under development for high capacity, high voltage cathodes in lithium ion batteries. Despite such practical importance, the mechanism of electrochemical activity in Li2MnO3 is contested in the literature, as are the effects of long-term electrochemical cycling. Here, Raman spectroscopy and mapping are used to follow the chemical and structural changes that occur in Li2MnO3. Both conventional slurry electrodes and thin films are studied as a function of the state of charge (voltage) and cycle number. Thin films have similar electrochemical properties as electrodes prepared from slurries,morebut allow for spectroscopic investigations on uniform samples without carbon additives. Spectral changes correlate well with electrochemical activity and support a mechanism whereby capacity is lost upon extended cycling due to the formation of new manganese oxide phases. Raman mapping of both thin film and slurry electrodes charged to different voltages reveals significant variation in the local structure. Poor conductivity and slow kinetics associated with a two-phase reaction mechanism contribute to the heterogeneity.less

  12. Magnetic anisotropy barrier for spin tunneling in Mn{sub 12}O{sub 12} molecules

    SciTech Connect (OSTI)

    Pederson, M.R. [Center for Computational Materials Science--6392, Naval Research Laboratory, Washington, D.C. 20375-5000 (United States)] [Center for Computational Materials Science--6392, Naval Research Laboratory, Washington, D.C. 20375-5000 (United States); Khanna, S.N. [Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284-2000 (United States)] [Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284-2000 (United States)

    1999-10-01

    Electronic structure calculations on the nature of electronic states and the magnetic coupling in Mn-acetate [Mn{sub 12}O{sub 12}(RCOO){sub 16}(H{sub 2}O){sub 4}] molecules have been been carried out within the generalized gradient approximation to the density functional formalism. Our studies on this 100-atom molecule illustrate the role of the nonmagnetic carboxyl host in stabilizing the ferrimagnetic Mn{sub 12}O{sub 12} core and provide estimates of the local magnetic moment at the various sites. We provide a first density-functional-based prediction of the second-order magnetic anisotropy energy of this system. Results are in excellent agreement with experiment. To perform these calculations we introduce a simplified exact method for spin-orbit coupling and magnetic anisotropy energies in multicenter systems. This method is free of shape approximations and has other advantages as well. First, it is valid for periodic boundary conditions or finite systems and is independent of basis set choice. Second, the method does not require the calculation of electric field. Third, for applications to systems with a finite energy gap between occupied and unoccupied electronic states, a perturbative expansion allows for a simple determination of the magnetic anisotropy energy. {copyright} {ital 1999} {ital The American Physical Society}

  13. Resonant spin tunneling in randomly oriented nanospheres of Mn12 acetate

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

    Lendnez, S.; Zarzuela, R.; Tejada, J.; Terban, M. W.; Billinge, S. J. L.; Espin, J.; Imaz, I.; Maspoch, D.; Chudnovsky, E. M.

    2015-01-06

    We report measurements and theoretical analysis of resonant spin tunneling in randomly oriented nanospheres of a molecular magnet. Amorphous nanospheres of Mn?? acetate have been fabricated and characterized by chemical, infrared, TEM, X-ray, and magnetic methods. Magnetic measurements have revealed sharp tunneling peaks in the field derivative of the magnetization that occur at the typical resonant field values for the Mn?? acetate crystal in the field parallel to the easy axis.Theoretical analysis is provided that explains these observations. We argue that resonant spin tunneling in a molecular magnet can be established in a powder sample, without the need for amoresingle crystal and without aligning the easy magnetization axes of the molecules. This is confirmed by re-analyzing the old data on a powdered sample of non-oriented micron-size crystals of Mn?? acetate. In conclusion, our findings can greatly simplify the selection of candidates for quantum spin tunneling among newly synthesized molecular magnets.less

  14. MnO{sub 2}@colloid carbon spheres nanocomposites with tunable interior architecture for supercapacitors

    SciTech Connect (OSTI)

    Zhang, Yuxin; Liu, Chuanpu; Wen, Zhongquan

    2014-01-01

    Graphical abstract: - Highlights: MnO{sub 2}@CSs nanocomposites have been successfully synthesized in room temperature. The composites exhibited three structures: coreshell, yolkshell and hollow structure. The yolkshell structure exhibited a high specific capacitance and cycling stability. - Abstract: MnO{sub 2}@colloid carbon spheres nanocomposites with tunable interior architecture have been synthesized by a facile and cost-effective strategy at room temperature. The structure and morphology of as-prepared nanocomposites were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), nitrogen adsorption, focused ion beam scanning electron microscopy (FIB/SEM) and high-resolution transmission electron microscopy (HRTEM). The as-obtained composites exhibited a three-dimensional architecture with coreshell, yolkshell and hollow interior structure. Furthermore, the electrochemical properties of composites were evaluated by cycle voltammetric (CV) and galvanostatic chargedischarge measurements. The yolkshell structure exhibited the optimized pseudocapacitance performance, revealing a specific capacitance (273 F g{sup ?1}) with a good rate and cycling stability, owing to its unique structure and the poor crystallinity of MnO{sub 2} nanofilms. Therefore, this facile synthetic strategy could be useful to design and synthesis of tunable nanostructures with enhanced supercapacitor behavior.

  15. Better Buildings Residential Network Program Sustainability Peer...

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

    CO Build It Green Chicago, IL Kansas City, MO Milwaukee, WI Philadelphia, PA Clinton Foundation--HEAL Program (Little Rock, AR) Economic Opportunity...

  16. Why MnIn{sub 2}O{sub 4} spinel is not a transparent conducting oxide?

    SciTech Connect (OSTI)

    Martinez-Lope, M.J.; Retuerto, M.; Calle, C. de la; Porcher, Florence

    2012-03-15

    The title compound has been synthesized by a citrate technique. The crystal structure has been investigated at room temperature from high-resolution neutron powder diffraction (NPD) data. It crystallizes in a cubic spinel structure, space group Fd3-bar m, Z=8, with a=9.0008(1) A at 295 K. It exhibits a crystallographic formula (Mn{sub 0.924(2)}In{sub 0.076(2)}){sub 8a}(In{sub 1.804(2)}Mn{sub 0.196(2)}){sub 16d}O{sub 4}, where 8a and 16d stand for the tetrahedral and octahedral sites of the spinel structure, respectively, with a slight degree of inversion, {lambda}=0.08. MnIn{sub 2}O{sub 4} shows antiferromagnetic interactions below T{sub N} Almost-Equal-To 40 K, due to the statistical distribution of Mn ions over the two available sites. Unlike the related MgIn{sub 2}O{sub 4} and CdIn{sub 2}O{sub 4} spinels, well known as transparent conducting oxides, MnIn{sub 2}O{sub 4} is not transparent and shows a poor conductivity ({sigma}=0.38 S cm{sup -1} at 1123 K): the presence of Mn ions, able to adopt mixed valence states, localizes the charges that, otherwise, would be delocalized in the spinel conduction band. - Graphical Abstract: From NPD data the crystallographic formula (Mn{sub 0.924(2)}In{sub 0.076(2)}){sub 8a}(In{sub 1.804(2)}Mn{sub 0.196(2)}){sub 16d}O{sub 4}, shows a slight degree of inversion, {lambda}=0.08 and a certain In deficiency. The presence of Mn ions, able to adopt mixed oxidation states, localize the charges that, otherwise, would be delocalized in the spinel conduction band; the presence of localized Mn{sup 2+} and Mn{sup 3+} ions provides the characteristic brown color. Highlights: Black-Right-Pointing-Pointer Accurate structural determination from NPD data: inversion degree (8%), and In deficiency. Black-Right-Pointing-Pointer Bond-valence indicates Mn{sup 2+}-Mn{sup 3+} ions; edge-sharing octahedra contain 90% In{sup 3+}+10% Mn{sup 3+} cations. Black-Right-Pointing-Pointer Conductivity several orders of magnitude lower than those of MgIn{sub 2}O{sub 4} or CdIn{sub 2}O{sub 4}. Black-Right-Pointing-Pointer Variability of Mn oxidation states cancels any electron-doping effect, emptying conduction band of mobile charge carriers. Black-Right-Pointing-Pointer Curie-Weiss behavior confirming the determined charge distribution.

  17. IL-2R{gamma} gene microdeletion demonstrates that canine X-linked severe combined immunodeficiency is a homologue of the human disease

    SciTech Connect (OSTI)

    Henthorn, P.S.; Fimiani, V.M.; Patterson, D.F.

    1994-09-01

    X-linked severe combined immunodeficiency (SCID) is characterized by profound defects in cellular and humoral immunity and, in humans, is associated with mutations in the gene for the {gamma} chain of the IL-2 receptor (IL-2R{gamma}). We have examined this gene in a colony of dogs established from a single X-linked SCID carrier female. Affected dogs have a 4-bp deletion in the first exon of the IL-2R{gamma} gene, which precludes the production of a functional protein, demonstrating that the canine disease is a true homologue of human X-linked SCID. 37 refs., 3 figs.

  18. Boric acid flux synthesis, structure and magnetic property of MB??O??(OH)?? (M=Mn, Fe, Zn)

    SciTech Connect (OSTI)

    Yang, Dingfeng; Cong, Rihong [College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044 (China); Gao, Wenliang, E-mail: gaowl@cqu.edu.cn [College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044 (China); Yang, Tao, E-mail: taoyang@cqu.edu.cn [College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044 (China)

    2013-05-01

    Three new borates MB??O??(OH)?? (M=Mn, Fe, Zn) have been synthesized by boric acid flux methods, which are isotypic to NiB??O??(OH)??. Single-crystal XRD was performed to determine the crystal structures in detail. They all crystallize in the monoclinic space group P2?/c. The size of MO{sub 6} (M=Mg, Mn, Fe, Co, Ni, Zn) octahedron shows a good agreement with the Shannon effective ionic radii of M?. Magnetic measurements indicate MnB??O??(OH)?? is antiferromagnetic without a long-range ordering down to 2 K. The values of its magnetic superexchange constants were evaluated by DFT calculations, which explain the observed magnetic behavior. The UVvis diffuse reflectance spectrum of ZnB??O??(OH)?? suggests a band gap ~4.6 eV. DFT calculations indicate it has a direct band gap 4.9 eV. The optical band gap is contributed by charge transfers from the occupied O 2p to the unoccupied Zn 4s states. - Graphical abstract: Experimental and theoretical studies indicate MnB??O??(OH)?? is antiferromagnetic without a long-range ordering. DFT calculations show ZnB??O??(OH)?? has a direct band gap of 4.9 eV. Highlights: MB??O??(OH)?? (M=Mn, Fe, Zn) are synthesized by two-step boric acid flux method. Single-crystal XRD was performed to determine the crystal structures in detail. Size of MO? (M=Mg, Mn, Fe, Co, Ni, Zn) agrees with the effective ionic radii. MnB??O??(OH)?? is antiferromagnetic without a long-range ordering down to 2 K. DFT calculations indicate ZnB??O??(OH)?? has a direct band gap 4.9 eV.

  19. Localized Immunotherapy via Liposome-Anchored Anti-CD137 + IL-2 Prevents Lethal Toxicity and Elicits Local and Systemic Antitumor Immunity

    E-Print Network [OSTI]

    Kwong, Brandon

    Immunostimulatory agonists such as anti-CD137 and interleukin (IL)-2 have elicited potent antitumor immune responses in preclinical studies, but their clinical use is limited by inflammatory toxicities that result upon ...

  20. Selezione pubblica per il conferimento di n. 1 assegno per collaborazione ad attivit di ricerca Bando AR N. 12/2014 del 11/12/2014 -Approvazione atti

    E-Print Network [OSTI]

    Di Pillo, Gianni

    Dipartimento di Fisiologia e Farmacologia "Vittorio Erspamer" del 24 novembre 2014 Fisiologia e Farmacologia "Vittorio Erspamer"; DISPONE Art.1 Sono approvati gli Fisiologia e Farmacologia "Vittorio Erspamer" di questa Universit per il settore

  1. Mixed metallic Ba(Co,Mn)X{sub 0.2-x}O{sub 3-{delta}} (X=F, Cl) hexagonal perovskites

    SciTech Connect (OSTI)

    Iorgulescu, Mihaela; Roussel, Pascal; Tancret, Nathalie; Renaut, Nicolas; Tiercelin, Nicolas; Mentre, Olivier

    2013-02-15

    We show here that the incorporation of Mn in Ba-Co-oxohalide, BaCoX{sub 0.2-x}O{sub 3-{delta}}, hexagonal perovskite stabilizes the 6H-form (stacking sequence (chhhch Prime ); c, h=[BaO{sub 3}] and h Prime =[BaOX] layers), with tetramers of face-sharing octahedra) rather than the trimeric 10H-form. On the contrary to previous results on the Fe incorporation in similar system leading to more reduced 10H-compounds, the Mn effect is to increase the mean (Co/Mn) valence better suited to the 6H form. We experienced a poor Mn/Co miscibility during our syntheses leading to great difficulties to isolate mixed Co/Mn single phase materials and/or weak reproducibility. Powder neutron diffraction data shows a mixed Mn/Co octahedral occupancy, while the tetrahedra are filled by Co{sup 3+} cations. Anionic vacancies were refined in the h Prime -[BaO{sub 1-z}X{sub 1-x}] layer and the next c-[BaO{sub 3-z}] layers, while the h-[BaO{sub 3}] layers are not oxygen deficient. Magnetic properties suggest that a part of Mn cations remain paramagnetic until low temperature, while isolated spin clusters (probably driven by AFM Co tetrahedral dimers) behave as low-dimensional AFM systems. Transport measurements reveal a transition from high-temperature metallic to low-temperature semi-conducting states that could occur from defect shallow donor upon the Mn for Co substitution. - Graphical abstract: The incorporation of Mn in Ba-Co-oxohalide, BaCoX{sub 0.2-x}O{sub 3-{delta}}, hexagonal perovskite stabilizes the 6H-form with tetrameric (Co,Mn){sub 4}O{sub 15} face sharing linear chains. This results from a oxidizing Mn effect and particular Mn/Co distribution. Highlights: Black-Right-Pointing-Pointer The incorporation of Mn in BaCoX{sub 0.2-x}O{sub 3-{delta}} (X=F,Cl) hexagonal perovskites stabilizes the 6H-form. Black-Right-Pointing-Pointer It contains tetrameric (Co,Mn){sub 4}O{sub 15} face sharing linear chains. Black-Right-Pointing-Pointer The preference for such chains better than trimeric ones is due to the Manganese oxidizing effect. Black-Right-Pointing-Pointer A particular Mn/Co distribution was evidenced. Black-Right-Pointing-Pointer Transport and magnetic properties drastically change during the Mn incorporation.

  2. Magnetic properties of ion implanted Ge{sub 1-x}Mn{sub x} thin films solidified through pulsed laser melting

    SciTech Connect (OSTI)

    Commisso Dolph, Melissa [Department of Physics, University of Virginia, Charlottesville, Virginia 22904 (United States); Kim, Taeseok; Recht, Daniel; Aziz, Michael J. [Harvard School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138 (United States); Yin Wenjing; Fan Wenbin; Yu Jiani; Lu Jiwei [Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904 (United States); Wolf, Stuart A. [Department of Physics, University of Virginia, Charlottesville, Virginia 22904 (United States); Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904 (United States)

    2011-05-01

    Ge{sub 1-x}Mn{sub x} thin films with an average Mn concentration of 0.64 at. % were fabricated through Mn ion implantation into crystalline germanium-on-insulator wafers. Implantation damage was removed and crystallinity restored by pulsed laser melting from a single 30-ns 308-nm XeCl{sup +} excimer laser pulse. Resolidified films demonstrated higher Curie temperatures but smaller saturation magnetizations than those of both as-implanted films and implanted films subjected to rapid thermal annealing. These findings are attributed to the redistribution of Mn during solidification.

  3. Observations of micro-structure and void formation in a 8% Mn stainless steel (ICL 016) irradiated with 46 MeV nickel ions

    E-Print Network [OSTI]

    Mazey, D J; Titchmarsh, J M

    1980-01-01

    Observations of micro-structure and void formation in a 8% Mn stainless steel (ICL 016) irradiated with 46 MeV nickel ions

  4. Structure and magnetic properties of Ba{sub 5}Ce{sub 1.25}Mn{sub 3.75}O{sub 15}, a new 10H-polytype in the Ba-Ce-Mn-O system

    SciTech Connect (OSTI)

    Macias, Mario A.; Mentre, Olivier; Cuello, Gabriel J.; Gauthier, Gilles H.

    2013-02-15

    Based on the peculiar magnetic properties that are observed in pseudo one-dimensional manganites, we decided to synthesize the new Ba{sub 5}Ce{sub 1.25}Mn{sub 3.75}O{sub 15} compound. The preparation was performed by solid state reaction in air at about 1350 Degree-Sign C, for which we found that the compound crystallizes in a hexagonal symmetry with space group P6{sub 3}/mmc (No-194) and cell parameters a=b=5.7861(2) A and c=23.902(1) A. The structural description was correlated with neutron diffraction and bond valence calculations, confirming the presence of Ce{sup 4+} and Mn{sup 4+} segregated in the different crystallographic positions. Ba{sub 5}Ce{sub 1.25}Mn{sub 3.75}O{sub 15} displays evidence for strong AFM couplings already set at room temperature. The main arrangement of Mn{sup 4+} in magnetically isolated tetramers of face-sharing octahedra is responsible for a metamagnetic-like transition around 50 K. - Graphical abstract: The new Ba{sub 5}Ce{sub 1.25}Mn{sub 3.75}O{sub 15} polytype shows strong AFM couplings in magnetically isolated [Ce{sub 0.25}Mn{sub 3.75}O{sub 15}] tetramers of face-sharing octahedral, resulting in a metamagnetic-like transition around 50 K. Highlights: Black-Right-Pointing-Pointer Ba{sub 5}Ce{sub 1.25}Mn{sub 3.75}O{sub 15}, a new 10H polytype, has been prepared in the Ba-Ce-Mn-O system. Black-Right-Pointing-Pointer The compound crystallizes in the P6{sub 3}/mmc space group with (cchhh){sub 2} stacking sequence. Black-Right-Pointing-Pointer [Ce{sub 0.25}Mn{sub 3.75}O{sub 15}] tetramers are separated by [CeO{sub 6}] octahedra in the structure. Black-Right-Pointing-Pointer Instead of robust AFM ordering, a metamagnetic-like transition is found around 50 K.

  5. Large ferroelectric polarization in the new double perovskite NaLaMnWO$_{6}$ induced by non-polar instabilities

    E-Print Network [OSTI]

    Fukushima, T; Picozzi, S; Perez-Mato, J M

    2011-01-01

    Based on density functional theory calculations and group theoretical analysis, we have studied NaLaMnWO$_{6}$ compound which has been recently synthesized [Phys. Rev. B 79, 224428 (2009)] and belongs to the $AA'BB'{\\rm O}_{6}$ family of double perovskites. At low temperature, the structure has monoclinic $P2_{1}$ symmetry, with layered ordering of the Na and La ions and rocksalt ordering of Mn and W ions. The Mn atoms show an antiferromagnetic (AFM) collinear spin ordering, and the compound has been reported as a potential multiferroic. By comparing the low symmetry structure with a parent phase of $P4/nmm$ symmetry, two distortion modes are found dominant. They correspond to MnO$_{6}$ and WO$_{6}$ octahedron \\textit{tilt} modes, often found in many simple perovskites. While in the latter these common tilting instabilities yield non-polar phases, in NaLaMnWO$_{6}$ the additional presence of the $A$-$A^{'}$ cation ordering is sufficient to make these rigid unit modes as a source of the ferroelectricity. Throu...

  6. Zero-field signal in the electron paramagnetic resonance spectrum of Mn{sup +2} in silicate glasses

    SciTech Connect (OSTI)

    Rakhimov, Rakhim R. [Center for Materials Research, Norfolk State University, Norfolk, Virginia 23504 (United States)] [Center for Materials Research, Norfolk State University, Norfolk, Virginia 23504 (United States); Jones, David E. [Center for Materials Research, Norfolk State University, Norfolk, Virginia 23504 (United States)] [Center for Materials Research, Norfolk State University, Norfolk, Virginia 23504 (United States)

    2000-07-22

    A 9.4-9.8 GHz electron paramagnetic resonance (EPR) study of Mn{sup +2}-doped Na{sub 2}O-CaO-MgO-SiO{sub 2} glasses has revealed a nonresonant microwave magneto-absorption near zero magnetic field in addition to normal paramagnetic absorption due to Mn{sup +2} ions, electron spin S=5/2. The low-field response has an opposite phase relative to paramagnetic signal and is independent of the mutual orientation of the magnetic field of the microwave H{sub 1} and static magnetic field H. In contrast, the paramagnetic signal is different for perpendicular H{sub 1}(perpendicular sign)H and parallel H{sub 1}(parallel sign)H polarization of the microwave field, which is attributed to enhancement of forbidden magnetic dipolar transitions and suppression of the allowed transitions for parallel polarization. The low-field response is described in terms of microwave dielectric losses that derive from the magneto-induced charge migration in the first coordination sphere of Mn{sup +2}. As opposed to the spin-polarized tunneling that was described in ferromagnets between different valence forms of Mn, the observed effect is due to spin-dependent tunneling that occurs in the vicinity of Mn{sup +2} in a diluted paramagnetic system. (c) 2000 American Institute of Physics.

  7. Structural and Chemical Evolution of Li- and Mn-rich Layered Cathode Material

    SciTech Connect (OSTI)

    Zheng, Jianming; Xu, Pinghong; Gu, Meng; Xiao, Jie; Browning, Nigel D.; Yan, Pengfei; Wang, Chong M.; Zhang, Jiguang

    2015-02-24

    Lithium (Li)- and manganese-rich (LMR) layered-structure materials are very promising cathodes for high energy density lithium-ion batteries. However, their voltage fading mechanism and its relationships with fundamental structural changes are far from being sufficiently understood. Here we report the detailed phase transformation pathway in the LMR cathode (Li[Li0.2Ni0.2Mn0.6]O2) during cycling for the samples prepared by hydro-thermal assistant method. It is found the transformation pathway of LMR cathode is closely correlated to its initial structure and preparation conditions. The results reveal that LMR cathode prepared by HA approach experiences a phase transformation from the layered structure to a LT-LiCoO2 type defect spinel-like structure (Fd-3m space group) and then to a disordered rock-salt structure (Fm-3m space group). The voltage fade can be well correlated with the Li ion insertion into octahedral sites, rather than tetrahedral sites, in both defect spinel-like structure and disordered rock-salt structure. The reversible Li insertion/removal into/from the disordered rock-salt structure is ascribed to the Li excess environment that can satisfy the Li percolating in the disordered rock-salt structure despite the increased kinetic barrier. Meanwhile, because of the presence of a great amount of oxygen vacancies, a significant decrease of Mn valence is detected in the cycled particle, which is below that anticipated for a potentially damaging Jahn-Teller distortion (+3.5). Clarification of the phase transformation pathway, cation redistribution, oxygen vacancy and Mn valence change undoubtedly provides insights into a profound understanding on the voltage fade, and capacity degradation of LMR cathode. The results also inspire us to further enhance the reversibility of LMR cathode via improving its surface structural stability.

  8. Neutron structural characterization, inversion degree and transport properties of NiMn{sub 2}O{sub 4} spinel prepared by the hydroxide route

    SciTech Connect (OSTI)

    Sagua, A.; Lescano, Gabriela M.; Alonso, J.A.; Martnez-Coronado, R.; Fernndez-Daz, M.T.; Morn, E.

    2012-06-15

    Graphical abstract: A pure specimen has been synthesized by the hydroxide route. This spinel, studied by NPD, shows an important inversion degree, ? = 0.80. A bond-valence study shows that the tetrahedral Mn ions are divalent whereas the octahedral Mn and Ni are slightly oxidized from the expected 3+ and 2+ values, respectively. The mixed valence Mn{sup 3+}/Mn{sup 4+} accounts for a hopping mechanism between adjacent octahedral sites, leading to a significant conductivity. Highlights: ? A low-temperature hydroxide route allowed preparing almost pure specimens of NiMn{sub 2}O{sub 4}. ? NPD essential to determine inversion degree; contrasting Ni and Mn for neutrons. ? Bond valence establishes valence state of octahedral and tetrahedral Ni and Mn ions. ? Thermal analysis, transport measurements complement characterization of this oxide. ? A structureproperties relationship is established. -- Abstract: The title compound has been synthesized by the hydroxide route. The crystal structure has been investigated at room temperature from high-resolution neutron powder diffraction (NPD) data. It crystallizes in a cubic spinel structure, space group Fd3{sup }m, Z = 8, with a = 8.3940(2) ? at 295 K. The crystallographic formula is (Ni{sub 0.202(1)}Mn{sub 0.798(1)}){sub 8a}(Ni{sub 0.790(1)}Mn{sub 1.210(1)}){sub 16d}O{sub 4} where 8a and 16d stand for the tetrahedral and octahedral sites of the spinel structure, respectively. There is a significant inversion degree of the spinel structure, ? = 0.80. In fact, the variable parameter for the oxygen position, u = 0.2636(4), is far from that expected (u = 0.25) for normal spinels. From a bond-valence study, it seems that the valence distribution in NiMn{sub 2}O{sub 4} spinel is not as trivial as expected (Ni{sup 2+} and Mn{sup 3+}), but clearly the tetrahedral Mn ions are divalent whereas the octahedral Mn and Ni are slightly oxidized from the expected +3 and +2 values, respectively. The mixed valence observed at the octahedral sites provides the charge carriers that, by a hopping mechanism between Mn{sup 3+}/Mn{sup 4+} adjacent sites, leads to a significant conductivity, up to 0.85 S cm{sup ?1} at 800 C in air.

  9. LiMn{sub 2}O{sub 4} nanoparticles anchored on graphene nanosheets as high-performance cathode material for lithium-ion batteries

    SciTech Connect (OSTI)

    Lin, Binghui; Yin, Qing; Hu, Hengrun; Lu, Fujia [School of Materials Science and Engineering, Nanjing University of Science and Technology, Xiaolingwei 200, Nanjing, Jiangsu 210094 (China); Xia, Hui, E-mail: xiahui@njust.edu.cn [School of Materials Science and Engineering, Nanjing University of Science and Technology, Xiaolingwei 200, Nanjing, Jiangsu 210094 (China); Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Nanjing 210094 (China)

    2014-01-15

    Nanocrystalline LiMn{sub 2}O{sub 4}/graphene nanosheets nanocomposite has been successfully synthesized by a one-step hydrothermal method without post-heat treatment. In the nanocomposite, LiMn{sub 2}O{sub 4} nanoparticles of 1030 nm in size are well crystallized and homogeneously anchored on the graphene nanosheets. The graphene nanosheets not only provide a highly conductive matrix for LiMn{sub 2}O{sub 4} nanoparticles but also effectively reduce the agglomeration of LiMn{sub 2}O{sub 4} nanoparticles. The nanocrystalline LiMn{sub 2}O{sub 4}/graphene nanosheets nanocomposite exhibited greatly improved electrochemical performance in terms of specific capacity, cycle performance, and rate capability compared with the bare LiMn{sub 2}O{sub 4} nanoparticles. The superior electrochemical performance of the nanocrystalline LiMn{sub 2}O{sub 4}/graphene nanosheets nanocomposite makes it promising as cathode material for high-performance lithium-ion batteries. - Graphical abstract: Nanocrystalline LiMn{sub 2}O{sub 4}/graphene nanosheets (GNS) nanocomposite exhibit superior cathode performance for lithium-ion batteries compared to the bare LiMn{sub 2}O{sub 4} nanoparticles. Display Omitted - Highlights: LiMn{sub 2}O{sub 4}/graphene nanocomposite is synthesized by a one-step hydrothermal method. LiMn{sub 2}O{sub 4} nanoparticles are uniformly anchored on the graphene nanosheets. The nanocomposite exhibits excellent cathode performance for lithium-ion batteries.

  10. Chemical spots and their dynamical evolution on HgMn stars

    E-Print Network [OSTI]

    Korhonen, Heidi; Briquet, Maryline; Gonzalez, Federico; Savanov, Igor

    2010-01-01

    Our recent studies of late B-type stars with HgMn peculiarity revealed for the first time the presence of fast dynamical evolution of chemical spots on their surfaces. These observations suggest a hitherto unknown physical process operating in the stars with radiative outer envelopes. Furthermore, we have also discovered existence of magnetic fields on these stars that have up to now been thought to be non-magnetic. Here we will discuss the dynamical spot evolution on HD 11753 and our new results on magnetic fields on AR Aur.

  11. Reactivity of Pb(II) at the Mn(III,IV) (Oxyhydr)Oxide-Water Interface

    E-Print Network [OSTI]

    Sparks, Donald L.

    A T O C H A , * , E V E R T J . E L Z I N G A , A N D D O N A L D L . S P A R K S DepartmentReactivity of Pb(II) at the Mn(III,IV) (Oxyhydr)Oxide-Water Interface C H R I S T O P H E R J . M and surface functional groups on R-Al2O3 depending on the specific surface site exposed. The uptake of Pb

  12. Conductance with stochastic resonance in Mn{sub 12} redox network without tuning

    SciTech Connect (OSTI)

    Hirano, Yoshiaki [Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043 (Japan); Graduate School of Engineering, University of Fukui, 3-9-1 Bunkyo, Fukui 910-8507 (Japan); Segawa, Yuji; Kawai, Tomoji [Institute of Scientific and Industrial Research (ISIR), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047 (Japan); Kuroda-Sowa, Takayoshi [Department of Chemistry, Faculty of Science and Engineering, Kinki University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502 (Japan); Matsumoto, Takuya, E-mail: matsumoto-t@chem.sci.osaka-u.ac.jp [Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043 (Japan)

    2014-06-09

    Artificial neuron-based information processing is one of the attractive approaches of molecular-scale electronics, which can exploit the ability of molecular system for self-assembling or self-organization. The self-organized Mn{sub 12}/DNA redox network shows nonlinear current-voltage characteristics that can be described by the Coulomb blockade network model. As a demonstration of the nonlinear network system, we have observed stochastic resonance without tuning for weak periodic input signals and thermal noise, which suggests a route to neural network composed of molecular materials.

  13. Magnetoelastic Coupling and Symmetry Breaking in the Frustrated Antiferromagnet {alpha}-NaMnO{sub 2}

    SciTech Connect (OSTI)

    Giot, Maud; Chapon, Laurent C.; Radaelli, Paolo G.; Androulakis, John; Lappas, Alexandros; Green, Mark A.

    2007-12-14

    The magnetic and crystal structures of the {alpha}-NaMnO{sub 2} have been determined by high-resolution neutron powder diffraction. The system maps out a frustrated triangular spin lattice with anisotropic interactions that displays two-dimensional spin correlations below 200 K. Magnetic frustration is lifted through magneto-elastic coupling, evidenced by strong anisotropic broadening of the diffraction profiles at high temperature and ultimately by a structural phase transition at 45 K. In this low-temperature regime a three-dimensional antiferromagnetic state is observed with a propagation vector k=((1/2),(1/2),0)

  14. Magnetic domain wall manipulation in (Ga,Mn)As nanostructures for spintronic applications

    SciTech Connect (OSTI)

    Wosinski, Tadeusz; Andrearczyk, Tomasz; Figielski, Tadeusz; Olender, Karolina; Wrobel, Jerzy

    2014-02-21

    Ring-shaped nanostructures have been designed and fabricated by electron-beam lithography patterning and chemical etching from thin epitaxial layers of the ferromagnetic semiconductor (Ga,Mn)As. The nanostructures, in a form of planar rings with a slit, were supplied with four electrical terminals and subjected to magneto-transport studies under planar weak magnetic field. Magnetoresistive effects caused by manipulation of magnetic domain walls and magnetization reversal in the nanostructures have been investigated and possible applications of the nanostructures as four-terminal spintronic devices are discussed.

  15. Elastic Constants of Ni-Mn-Ga Magnetic Shape Memory Alloys

    SciTech Connect (OSTI)

    Stipcich, M. [Universitat de Barcelona; Manosa, L. [Universitat de Barcelona; Planes, A. [Universitat de Barcelona; Morin, M. [INSA de Lyon; Zarestky, Jerel L [ORNL; Lograsso, Tom [Ames Laboratory; Stassis, C. [Ames Laboratory

    2004-01-01

    We have measured the adiabatic second order elastic constants of two Ni-Mn-Ga magnetic shape memory crystals with different martensitic transition temperatures, using ultrasonic methods. The temperature dependence of the elastic constants has been followed across the ferromagnetic transition and down to the martensitic transition temperature. Within experimental errors no noticeable change in any of the elastic constants has been observed at the Curie point. The temperature dependence of the shear elastic constant C' has been found to be very different for the two alloys. Such a different behavior is in agreement with recent theoretical predictions for systems undergoing multi-stage structural transitions.

  16. Generation and control of spin-polarized photocurrents in GaMnAs heterostructures

    SciTech Connect (OSTI)

    Bezerra, Anibal T. Farinas, Paulo F.; Studart, Nelson; Degani, Marcos H.; Maialle, Marcelo Z.

    2014-01-13

    Photocurrents are calculated for a specially designed GaMnAs semiconductor heterostructure. The results reveal regions in the infrared range of the energy spectrum, in which the proposed structure is remarkably spin-selective. For such photon energies, the generated photocurrents are strongly spin-polarized. Application of a relatively small static bias in the growth direction of the structure is predicted to efficiently reverse the spin-polarization for some photon energies. This behavior suggests the possibility of conveniently simple switching mechanisms. The physics underlying the results is studied and understood in terms of the spin-dependent properties emerging from the particular potential profile of the structure.

  17. Magnetic and transport properties of Mn{sub 2}CoAl oriented films

    SciTech Connect (OSTI)

    Jamer, Michelle E.; Assaf, Badih A.; Devakul, Trithep; Heiman, Don

    2013-09-30

    The structure, magnetic, and transport properties of thin films of the Heusler ferrimagnet Mn{sub 2}CoAl have been investigated for properties related to spin gapless semiconductors. Oriented films were grown by molecular beam epitaxy on GaAs substrates and the structure was found to transform from tetragonal to cubic for increasing annealing temperature. The anomalous Hall resistivity is found to be proportional to the square of the longitudinal resistivity and magnetization expected for a topological Berry curvature origin. A delicate balance of the spin-polarized carrier type when coupled with voltage gate-tuning could significantly impact advanced electronic devices.

  18. Magnetocrystalline Anisotropy in UMn2Ge2 and Related Mn-based Actinide Ferromagnets

    SciTech Connect (OSTI)

    Parker, David S; Mandrus, D.; Ghimire, N J; Baumbach, Ryan; Singleton, John; Thompson, J.D.; Bauer, Eric D.; Li, Ling; Singh, David J

    2015-01-01

    We present magnetization isotherms in pulsed magnetic fields up to 62 Tesla, supported by first principles calculations, demonstrating a huge uniaxial magnetocrystalline anisotropy energy - approximately 20 MJ/m3 - in UMn2Ge2. This large anisotropy results from the extremely strong spin-orbit coupling affecting the uranium 5 f electrons, which in the calculations exhibit a substantial orbital moment exceeding 2 Bohr magnetons. We also find from theoretical calculations that a number of isostructural Mn-actinide compounds are expected to have similarly large anisotropy.

  19. File:USDA-CE-Production-GIFmaps-MN.pdf | 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 Home Page on QA:QAsource History View New Pages RecentTempCampApplicationWorksheet 2011.pdf JumpTransmissionKY.pdf JumpMN.pdf Jump

  20. Electrochemical Performances of LiMnPO4 Synthesized from Non-Stoichiometric

    Office of Scientific and Technical Information (OSTI)

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield MunicipalTechnical Report:Speeding accessby aLED Street Lighting Host Site:ERDACarlo-integratedLi/Mn

  1. Calculations of structural, elastic, electronic, magnetic and phonon properties of FeNiMnAl by the first principles

    SciTech Connect (OSTI)

    U?ur, ?ule; ?yigr, Ahmet

    2014-10-06

    The electronic, elastic and dynamical properties of the quaternary alloy FeNiMnAl have been investigated using a pseudopotential plane wave method within the generalized gradient approximation (GGA). We determined the lattice parameters and the bulk modulus B. In addition, the elastic properties such as elastic constans (C{sub 11}, C{sub 12} and C{sub 44}), the shear modulus G, the young modulus E, the poisson's ratio ? and the B/G ratio are also given. The FeNiMnAl Heusler alloy exhibit a ferromagnetic half-metallic behavior with the total magnetic moment of 4.02 ?{sub B}. The phonon dispersion of FeNiMnAl has been performed using the density functional theory and the direct method with 222 supercell.

  2. Depth-dependent magnetism in epitaxial MnSb thin films: effects of surface passivation and cleaning

    SciTech Connect (OSTI)

    Aldous J. D.; Sanchez-Hanke C.; Burrows, C.W.; Maskery, I.; Brewer, M.S.; Hase, T.P.A.; Duffy, J.A.; Lees, M. Rs; Decoster, T.; Theis, W.; Quesada, A.; Schmid, A.K.; Bell, G.R.

    2012-03-15

    Depth-dependent magnetism in MnSb(0001) epitaxial films has been studied by combining experimental methods with different surface specificities: polarized neutron reflectivity, x-ray magnetic circular dichroism (XMCD), x-ray resonant magnetic scattering and spin-polarized low energy electron microscopy (SPLEEM). A native oxide {approx}4.5 nm thick covers air-exposed samples which increases the film's coercivity. HCl etching efficiently removes this oxide and in situ surface treatment of etched samples enables surface magnetic contrast to be observed in SPLEEM. A thin Sb capping layer prevents oxidation and preserves ferromagnetism throughout the MnSb film. The interpretation of Mn L{sub 3,2} edge XMCD data is discussed.

  3. Activation of IL-2 receptor {alpha}-chain gene by individual members of the rel oncogene family in association with serum response factor

    SciTech Connect (OSTI)

    Pierce, J.W.; Jamieson, C.A.; Ross, J.L.

    1995-08-15

    Expression of the IL-2R{alpha} gene is regulated by members of the c-Rel/NF-{kappa}B family of transcription factors binding to the {kappa}B site in the promoter. Previous work has not defined the role of individual members of the c-Rel family in the activation of the IL-2R{alpha} gene. Using the COS cell system, we were able to reconstitute the regulation of the IL-2R{alpha} promoter by expressing cloned Rel family members with serum response factor (SRF). We found that c-rel alone activated the IL-2R{alpha} promoter only weakly but worked with the p50 subunit of NF-{kappa}B (NFKB1) to give a higher level of expression. We showed that c-rel heterodimerizes with p50 and the amount of this heterodimer correlated with the level of IL-2R{alpha} gene expression. Our results provide evidence that c-rel/p50 heterodimers activate gene expression in the context of a cellular promoter. We show that c-rel or p65 can cooperate with SRF in the activation of this promoter and the transactivation by c-rel with SRF was enhanced by p50. Synergistic activation required both {kappa}B an CArG sites, and binding studies show that these that these adjacent sites can be occupied simultaneously. The transactivation observed with cloned transcription factors mimics the physiologic induction of the IL-2R{alpha} gene since multiple sequence elements cooperate to give gene activation. The data support the model that c-rel/p50 or p65 can cooperate with SRF to specifically target the expression of the IL-2R{alpha} gene in activated T cells.

  4. Structural and Functional Characterization of Redox Mn and Co Sites in AlPO Materials and Their Role in Alkane Oxidation Catalysis

    E-Print Network [OSTI]

    Iglesia, Enrique

    and at similar rates, indicating excellent agreement between these techniques. No H2O or CO2 were detected during could be accurately described by Arrhenius-type behavior, and H2/Me ratios showed that only a fraction of all Me cations undergo reversible redox cycles. This fraction was 0.86 for MnAPO-18 (atomic Mn/P ) 0

  5. Weisman Art Museum | 333 East River Road | Minneapolis, MN 55455 | P: 612.625.9494 | F: 612.625.9630 | WAM.UMN.EDU FOR IMMEDIATE RELEASE

    E-Print Network [OSTI]

    Thomas, David D.

    Weisman Art Museum | 333 East River Road | Minneapolis, MN 55455 | P: 612.625.9494 | F: 612@umn.edu Weisman Art Museum presents stories of hope in The Youth/Dhallinyarada Exhibition dates: July 13, 2013 through February 9, 2014 Minneapolis, MN The Weisman Art Museum at the University of Minnesota, presents

  6. Spin polarization of a Ferromagnetic Narrow Gap p-(In,Mn)As Obtained from Andreev Reflection Spectroscopy

    SciTech Connect (OSTI)

    Akazaki, T. [NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa, 243-0198 (Japan); Munekata, H. [Imaging Science and Engineering Laboratory, Tokyo Institute of Technology, 425-R2-57 Nagatsuta, Midori-ku, Yokohama 226-8503 (Japan); Yokoyama, T. [Dept. Physics, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550 (Japan); Tanaka, Y. [Dept. Applied Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603 (Japan); Takayanagi, H. [Research Institute for Science and Technology, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo, 162-8601 (Japan); International Center for Materials Nanoarchitectronics, NIMS (Japan)

    2011-12-26

    Spin-polarized carrier transport across Nb/p-(In,Mn)As junctions has been studied. Suppressions of conductance in the superconductor sub-gap region and conductance peaks at the bias voltage around the edge of the sub-gap are observed. These features are well reproduced by a newly modified BTK model including both spin polarization and the inverse proximity effect. The value of spin polarization in p-(In,Mn)As extracted by the calculation is P = 0.725 at 0.5 K with Z = 0.25.

  7. Thermochemical generation of hydrogen and oxygen from water. [NaMnO/sub 2/ and TiO/sub 2/

    DOE Patents [OSTI]

    Robinson, P.R.; Bamberger, C.E.

    1980-02-08

    A thermochemical cyclic process for the production of hydrogen exploits the reaction between sodium manganate (NaMnO/sub 2/) and titanium dioxide (TiO/sub 2/) to form sodium titanate (Na/sub 2/TiO/sub 3/), manganese (II) titanate (MnTiO/sub 3/) and oxygen. The titanate mixture is treated with sodium hydroxide, in the presence of steam, to form sodium titanate, sodium manganate (III), water and hydrogen. The sodium titanate-manganate (III) mixture is treated with water to form sodium manganate (III), titanium dioxide and sodium hydroxide. Sodium manganate (III) and titanium dioxide are recycled following dissolution of sodium hydroxide in water.

  8. Variation of the Mn I 539.4 nm line with the solar cycle

    E-Print Network [OSTI]

    Danilovic, S; Livingston, W; Krivova, N; Vince, I

    2015-01-01

    As a part of the long-term program at Kitt Peak National Observatory (KPNO), the Mn I 539.4 nm line has been observed for nearly three solar cycles using the McMath telescope and the 13.5 m spectrograph in double-pass mode. These full-disk spectrophotometric observations revealed an unusually strong change of this line's parameters over the solar cycle. Optical pumping by the Mg II k line was originally proposed to explain these variations. More recent studies have proposed that this is not required and that the magnetic variability might explain it. Magnetic variability is also the mechanism that drives the changes in total solar irradiance variations (TSI). With this work we investigate this proposition quantitatively by using using the model SATIRE-S. We applied exactly the same model atmospheres and value of the free parameter as were used in previous solar irradiance reconstructions to now model the variation in the Mn I 539.4 nm line profile and in neighboring Fe I lines. We compared the results of the ...

  9. Durability of (Pr0.7sr0.3)Mn03 +/-delta/8ysz

    SciTech Connect (OSTI)

    An, Ke [ORNL; Reifsnider, K L [University of Connecticut, Storrs; Gao, C Y [University of Tennessee, Knoxville (UTK)

    2006-01-01

    Half cell SOFCs with Durability of (Pr{sub 0.7}Sr{sub 0.3})Mn0{sub 3}{+-}{delta}/8YSZ composite cathodes on 8YSZ electrolytes were aged up to 1000 h at 1000 C in air with/without 0.318 A cm{sup -2} cathodic polarization. During the aging, the performance of the half cell SOFCs was measured using electrochemical impedance spectroscopy (EIS). After aging, the surface of the composite cathode and the interface between the composite cathode and the electrolyte was investigated with scanning electron microscopy (SEM). Chemical element analysis was performed with energy dispersive X-ray spectroscopy (EDS). The performance of the half cell SOFCs degraded after aging with/without polarization compared to the initial state. The SOFCs had a larger polarization resistance after 1000 h of aging. The cathodic current was shown to have an impact on the performance by slowing down the rate of decrease of polarization resistance of the SOFCs. After aging, the microstructural properties--mean pore size increased and cumulative pore volume decreased, and growth of grains was found on the Durability of (Pr{sub 0.7}Sr{sub 0.3})Mn0{sub 3}{+-}{delta} phases.

  10. Electronic and magnetic properties of double perovskite Dy{sub 2}MnCoO{sub 6} by first-principles calculation

    SciTech Connect (OSTI)

    Ganeshraj, C.; Santhosh, P. N.

    2014-05-07

    Using first-principles calculation, we investigate electronic and magnetic properties of Dy{sub 2}MnCoO{sub 6}. A detailed structural optimization has been done and found that the orthorhombic structure with Mn (Co) ions aligning along the longest axis type is the most stable structure. Within the generalized gradient approximation, the spin polarized calculations predict Dy{sub 2}MnCoO{sub 6} to be a half-metallic with ferromagnetic interaction between Mn and Co ions and antiferromagnetic interaction between Dy and Mn/Co ions. We also investigate the effect of Hubbard parameter (U) on the ground state magnetic structure. For all values of Hubbard U parameter the Co ions have nonzero magnetic moment; they do not lie in low-spin state, as in DyCoO{sub 3}.

  11. Electrochemically induced deposition method to prepare {gamma}-MnO{sub 2}/multi-walled carbon nanotube composites as electrode material in supercapacitors

    SciTech Connect (OSTI)

    Fan Zhen

    2008-08-04

    The {gamma}-MnO{sub 2}/multi-walled carbon nanotube ({gamma}-MnO{sub 2}/MWNT) composite has been prepared by electrochemically induced deposition method. The morphology and crystal structure of the composite were investigated by X-ray diffraction and scanning electron microscopy, respectively. The capacitive properties of the {gamma}-MnO{sub 2}/MWNT composite have been investigated by cyclic voltammetry (CV). A specific capacitance (based on {gamma}-MnO{sub 2}) as high as 579 F g{sup -1} is obtained at a scan rate of 10 mV s{sup -1} in 0.1 M Na{sub 2}SO{sub 4} aqueous solution. Additionally, the {gamma}-MnO{sub 2}/MWNT composite electrode shows excellent long-term cycle stability (only 2.4% decrease of the specific capacitance is observed after 500 CV cycles)

  12. Radiation-induced instability of MnS precipitates and its possible consequences on irradiation-induced stress corrosion cracking of austenitic stainless steels

    SciTech Connect (OSTI)

    Chung, H.M.; Sanecki, J.E.; Garner, F.A.

    1996-12-01

    Irradiation-assisted stress corrosion cracking (IASCC) is a significant materials issue for the light water reactor (LWR) industry and may also pose a problem for fusion power reactors that will use water as coolant. A new metallurgical process is proposed that involves the radiation-induced release into solution of minor impurity elements not usually thought to participate in IASCC. MnS-type precipitates, which contain most of the sulfur in stainless steels, are thought to be unstable under irradiation. First, Mn transmutes strongly to Fe in thermalized neutron spectra. Second, cascade-induced disordering and the inverse Kirkendall effect operating at the incoherent interfaces of MnS precipitates are thought to act as a pump to export Mn from the precipitate into the alloy matrix. Both of these processes will most likely allow sulfur, which is known to exert a deleterious influence on intergranular cracking, to re-enter the matrix. To test this hypothesis, compositions of MnS-type precipitates contained in several unirradiated and irradiated heats of Type 304, 316, and 348 stainless steels (SSs) were analyzed by Auger electron spectroscopy. Evidence is presented that shows a progressive compositional modification of MnS precipitates as exposure to neutrons increases in boiling water reactors. As the fluence increases, the Mn level in MnS decreases, whereas the Fe level increases. The S level also decreases relative to the combined level of Mn and Fe. MnS precipitates were also found to be a reservoir of other deleterious impurities such as F and O which could be also released due to radiation-induced instability of the precipitates.

  13. Cross-plane electronic and thermal transport properties of p-type La0.67Sr0.33MnO3/LaMnO3 perovskite oxide metal/semiconductor

    E-Print Network [OSTI]

    Xu, Xianfan

    perovskite oxide metal/semiconductor superlattices Pankaj Jha,1,2 Timothy D. Sands,1,2,3,a) Laura Cassels,4)/lanthanum manganate (LaMnO3, i.e., LMO) perovskite oxide metal/semiconductor superlattices were investigated

  14. Synthesis, crystal structure, and vibrational spectroscopic and UV-visible studies of Cs{sub 2}MnP{sub 2}O{sub 7}

    SciTech Connect (OSTI)

    Kaoua, Saida; Krimi, Saida; Pechev, Stanislav; Gravereau, Pierre; Chaminade, Jean-Pierre; Couzi, Michel; El Jazouli, Abdelaziz

    2013-02-15

    A new member of the A{sub 2}MP{sub 2}O{sub 7} diphosphate family, Cs{sub 2}MnP{sub 2}O{sub 7}, has been synthesized and structurally characterized. The crystal structure was determined by single crystal X-Ray diffraction. Cs{sub 2}MnP{sub 2}O{sub 7} crystallizes in the orthorhombic system, space group Pnma ( Music-Sharp-Sign 62), with the unit cell parameters a=16.3398(3), b=5.3872(1), c=9.8872(2) A, Z=4 and V=870.33(3) A{sup 3}. The structure parameters were refined to a final R{sub 1}/wR{sub 2}=0.0194/0.0441 for 1650 observed reflections. The 2D framework of Cs{sub 2}MnP{sub 2}O{sub 7} structure consists of P{sub 2}O{sub 7} and MnO{sub 5} units. The corner-shared MnO{sub 5} and P{sub 2}O{sub 7} units are alternately arranged along the b axis to form [(MnO)P{sub 2}O{sub 7}]{sub {infinity}} chains. These chains are interconnected by an oxygen atom to form sheets parallel to the (b, c) plane. The cesium atoms are located between the sheets in 9- and 10-fold coordinated sites. The infrared and Raman vibrational spectra have been investigated. A factor group analysis leads to the determination of internal modes of (P{sub 2}O{sub 7}) groups. UV-visible spectrum consists of weak bands, between 340 and 700 nm, assigned to the forbidden d-d transitions of Mn{sup 2+} ion, and of a strong band around 250 nm, attributed to the O--Mn charge transfer. - Graphical abstract: Structure of Cs{sub 2}MnP{sub 2}O{sub 7}: The 2D structure of Cs{sub 2}MnP{sub 2}O{sub 7} is built from P{sub 2}O{sub 7} diphosphate groups and MnO{sub 5} square pyramids which share corners and form [(MnO)P{sub 2}O{sub 7}]{sub {infinity}} chains along b axis. These chains are interconnected by an oxygen atom to form wavy (MnP{sub 2}O{sub 7}){sup 2-} sheets parallel to the (b, c) plane. The cesium ions are located between these sheets in the inter-layers space, in zigzag positions. Highlights: Black-Right-Pointing-Pointer A new diphosphate, Cs{sub 2}MnP{sub 2}O{sub 7}, has been synthesized and structurally characterized. Black-Right-Pointing-Pointer The structure consists of a 2D framework built up from (MnP{sub 2}O{sub 7}) sheets. Black-Right-Pointing-Pointer The sheets consist of [(MnO)P{sub 2}O{sub 7}]{sub {infinity}} chains formed by P{sub 2}O{sub 7} units and MnO{sub 5} square pyramids. Black-Right-Pointing-Pointer A factor group analysis leads to the determination of internal modes of (P{sub 2}O{sub 7}) groups. Black-Right-Pointing-Pointer UV-visible spectrum consists bands assigned to d-d transitions of Mn{sup 2+} ion and to O--Mn CT.

  15. Copyright 2010 IEEE. Reprinted from Proceedings of the 2010 IEEE Power & Energy Society General Meeting, Minneapolis, MN, USA.

    E-Print Network [OSTI]

    Kemner, Ken

    General Meeting, Minneapolis, MN, USA. This material is posted here with permission of the IEEE and therefore is exposed to fluctuations in future electricity prices (day-ahead and real-time) and potential from participating in the wholesale electricity market. We propose a methodology to derive optimal day

  16. Magnetic and structural properties of Mn-implanted GaN N. Theodoropoulou and A. F. Hebard

    E-Print Network [OSTI]

    Hebard, Arthur F.

    process- ing, and storage and in photonics. It has been demonstrated in a number of semiconductors, and S. J. Peartona) Department of Materials Science and Engineering, University of Florida, Gainesville hole concentration of 2 1017 cm 3 . Mn ions were implanted at an energy of 250 keV and doses from 1015

  17. Theoretical Study of the Structural Evolution of a Na2FeMn(CN)6 Cathode upon Na Intercalation

    E-Print Network [OSTI]

    Henkelman, Graeme

    Blue analog, NaxFeMn(CN)6, is a potential new cathode material for Na-ion batteries. During Na-sharing tetrahedra. INTRODUCTION Cathode materials for Li and Na batteries have attracted a great deal of interest for renewable energy applications.1-3 They are also of interest scientifically, owing to the rich chemistry

  18. Magnetic properties of MnSb inclusions formed in GaSb matrix directly during molecular beam epitaxial growth

    SciTech Connect (OSTI)

    Lawniczak-Jablonska, Krystyna; Wolska, Anna; Klepka, Marcin T.; Kret, Slawomir; Kurowska, Boguslawa; Kowalski, Bogdan J.; Twardowski, Andrzej; Wasik, Dariusz; Kwiatkowski, Adam; Sadowski, Janusz

    2011-04-01

    Despite of intensive search for the proper semiconductor base materials for spintronic devices working at room temperature no appropriate material based on ferromagnetic semiconductors has been found so far. We demonstrate that the phase segregated system with MnSb hexagonal inclusions inside the GaSb matrix, formed directly during the molecular beam epitaxial growth reveals the ferromagnetic properties at room temperature and is a good candidate for exploitation in spintronics. Furthermore, the MnSb inclusions with only one crystalline structure were identified in this GaMn:MnSb granular material. The SQUID magnetometry confirmed that this material exhibits ferromagnetic like behavior starting from helium up to room temperature. Moreover, the magnetic anisotropy was found which was present also at room temperature, and it was proved that by choosing a proper substrate it is possible to control the direction of easy axis of inclusions' magnetization moment between in-plane and out-of-plane; the latter is important in view of potential applications in spintronic devices.

  19. Incremental Analysis of Power Grids using Backward Random Walks Baktash Boghrati and Sachin S. Sapatnekar, University of Minnesota, Minneapolis, MN

    E-Print Network [OSTI]

    Sapatnekar, Sachin

    intensive task. In this work, we first introduce an accurate modeling methodology for power grids thatA Incremental Analysis of Power Grids using Backward Random Walks Baktash Boghrati and Sachin S. Sapatnekar, University of Minnesota, Minneapolis, MN Power grid design and analysis is a critical part

  20. First-principles study of Mn-induced local magnetic moments in host semiconductors Shi-Hao Wei

    E-Print Network [OSTI]

    Gong, Xingao

    230031, China Gustavo M. Dalpian and Su-Huai Wei National Renewable Energy Laboratory, Golden, Colorado the high energy state, thus lowering the total energy. In the case where no hole is present, such as in Cd lowering the total energy.1,5 However, recent discovery that Mn-doped III-V semiconduc- tors can have

  1. Highly luminescent surface-passivated ZnS:Mn nanoparticles by a simple one-step synthesis

    E-Print Network [OSTI]

    Park, Byungwoo

    to the formation of an effective passivation layer induced by lithium, and consequent suppression enhancement afforded by the formation of the passivation layer induced by lithium addition was stud- ied ml , and Mn NO3 2 0.05 g and LiOHH2O were prepared in distilled water. Zinc acetate solution

  2. Phase-separated high-temperature-annealed (Ga,Mn)As: A negative charge-transfer-energy material

    E-Print Network [OSTI]

    Moreno, M

    2011-01-01

    The approximate location in the Zaanen-Sawatzky-Allen diagram of the phase-separated (Ga,Mn)As material, consisting of MnAs nanoclusters embedded in GaAs, is determined on the basis of configuration-interaction (CI) cluster-model analysis of their Mn 2p core-level photoemission. The composite material is found to belong to the special class of materials with negative charge-transfer energy (delta). As such, its metallic or insulating/semiconducting behavior depends on the strength of the p-d hybridization (affected by strain) relative to the (size-dependent) p-bandwidth. Whereas internal strain in the embedded clusters counteracts gap opening, a metal-to-semiconductor transition is expected to occur for decreasing cluster size, associated to the opening of a small gap of p-p type (covalent gap). The electronic properties of homogeneous and phase-separated (Ga,Mn)As materials are analyzed, with emphasis on the nature of their metal-insulator transitions.

  3. Magnetization dependence on electron density in epitaxial ZnO thin films codoped with Mn and Sn

    E-Print Network [OSTI]

    Hebard, Arthur F.

    technology. Moreover, this material is useful in delineating the origin of ferromagnetism in a semiconductor. Ivill, S. J. Pearton, and D. P. Nortona Department of Materials Science and Engineering, University online 11 February 2005 The magnetic and transport properties of Mn-doped ZnO thin films codoped with Sn

  4. A non-volatile-memory device on the basis of engineered anisotropies in (Ga,Mn)As

    E-Print Network [OSTI]

    Loss, Daniel

    orbit-mediated coupling of magnetic and semiconductor properties in this material gives rise to many novel transport,Mn)As is a prototypical material for investigating potential device applications of ferromagnetic semiconductors. The spin.1038/nphys652 The rich anisotropic transport behaviour shown by ferromagnetic semiconductors arises from

  5. Heat capacity of the site-diluted spin dimer system Ba?(Mn1-xVx)?O?

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

    Samulon, E. C.; Shapiro, M. C.; Fisher, I. R.

    2011-08-01

    Heat-capacity and susceptibility measurements have been performed on the diluted spin dimer compound Ba?(Mn1-xVx)?O?. The parent compound Ba?Mn?O? is a spin dimer system based on pairs of antiferromagnetically coupled S=1, 3d Mn?? ions such that the zero-field ground state is a product of singlets. Substitution of nonmagnetic S=0, 3d? V?? ions leads to an interacting network of unpaired Mn moments, the low-temperature properties of which are explored in the limit of small concentrations 0?x?0.05. The zero-field heat capacity of this diluted system reveals a progressive removal of magnetic entropy over an extended range of temperatures, with no evidence for amorephase transition. The concentration dependence does not conform to expectations for a spin-glass state. Rather, the data suggest a low-temperature random singlet phase, reflecting the hierarchy of exchange energies found in this system.less

  6. Mn-doped Ga(As,P) and (Al,Ga)As ferromagnetic semiconductors: Electronic structure calculations

    E-Print Network [OSTI]

    Masek, J.; Kudrnovsky, J.; Maca, F.; Sinova, Jairo; MacDonald, A. H.; Campion, R. P.; Gallagher, B. L.; Jungwirth, T.

    2007-01-01

    A remarkable progress towards functional ferromagnetic semiconductor materials for spintronics has been achieved in p-type (Ga,Mn)As. Robust hole-mediated ferromagnetism has, however, been observed also in other III-V hosts such as antimonides, Ga...

  7. Unusual magnetic hysteresis and the weakened transition behavior induced by Sn substitution in Mn{sub 3}SbN

    SciTech Connect (OSTI)

    Sun, Ying, E-mail: sunying@buaa.edu.cn [Center for Condensed Matter and Materials Physics, Department of Physics, Beihang University, Beijing 100191 (China); International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, Tsukuba, Ibaraki 305-0044 (Japan); Guo, Yanfeng; Li, Jun; Wang, Xia [Superconducting Properties Unit, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044 (Japan); Tsujimoto, Yoshihiro [Materials Processing Unit, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047 (Japan); Wang, Cong [Center for Condensed Matter and Materials Physics, Department of Physics, Beihang University, Beijing 100191 (China); Feng, Hai L.; Sathish, Clastin I.; Yamaura, Kazunari, E-mail: yamaura.kazunari@nims.go.jp [Superconducting Properties Unit, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044 (Japan); Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo, Hokkaido 060-0810 (Japan); Matsushita, Yoshitaka [Analysis Station, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047 (Japan)

    2014-01-28

    Substitution of Sb with Sn was achieved in ferrimagnetic antiperovskite Mn{sub 3}SbN. The experimental results indicate that with an increase in Sn concentration, the magnetization continuously decreases and the crystal structure of Mn{sub 3}Sb{sub 1-x}Sn{sub x}N changes from tetragonal to cubic phase at around x of 0.8. In the doping series, step-like anomaly in the isothermal magnetization was found and this behavior was highlighted at x?=?0.4. The anomaly could be attributed to the magnetic frustration, resulting from competition between the multiple spin configurations in the antiperovskite lattice. Meantime, H{sub c} of 18 kOe was observed at x?=?0.3, which is probably the highest among those of manganese antiperovskite materials reported so far. With increasing Sn content, the abrupt change of resistivity and the sharp peak of heat capacity in Mn{sub 3}SbN were gradually weakened. The crystal structure refinements indicate the weakened change at the magnetic transition is close related to the change of c/a ratio variation from tetragonal to cubic with Sn content. The results derived from this study indicate that the behavior of Mn{sub 3}Sb{sub 1-x}Sn{sub x}N could potentially enhance its scientific and technical applications, such as spin torque transfer and hard magnets.

  8. Algebra (Informatica) 24 marzo 2004 Con pi`u di 18 punti si pu`o fare l'orale o accettare il voto dello scritto (30 e lode per chi

    E-Print Network [OSTI]

    Catenacci, Roberto

    Algebra (Informatica) ­ 24 marzo 2004 Con pi`u di 18 punti si pu`o fare l'orale o accettare il voto

  9. Algebra (Informatica) 22 giugno 2004 Con 18 o pi`u punti si pu`o fare l'orale o accettare il voto dello scritto (30 e lode per chi risolve

    E-Print Network [OSTI]

    Catenacci, Roberto

    Algebra (Informatica) ­ 22 giugno 2004 Con 18 o pi`u punti si pu`o fare l'orale o accettare il voto

  10. Immunosuppressive effect of the anti-IL-2-receptor monoclonal antibody, AMT-13, on organ-cultured fetal pancreas allograft survival

    SciTech Connect (OSTI)

    Burkhardt, K.; Loughnan, M.S.; Diamantstein, T.; Mandel, T.E.

    1988-11-01

    Recently, prolongation of cardiac allograft survival in mice was reported using a rat anti-IL-2R mAb (AMT-13). However, its immunosuppressive action in vivo, alone and in combination with other immunosuppressants, and its effect on other organ transplants has not been extensively studied. We grafted cultured fetal pancreas from CBA (H-2k) donors to Balb/c (H-2d) mice. Recipients were treated with 10 consecutive daily injections each of 20 micrograms AMT-13 only, or with an additional mild immunosuppression of 350 rads irradiation. Control groups received rat immunoglobulin or 350 rads irradiation. Graft survival and the phenotype of infiltrating cells were assessed histologically and immunocytochemically on days 12, 17, and 21, and soluble IL-2R levels were measured in the serum with a quantitative ELISA in all recipients. Two of five grafts in the AMT-13-treated group had islets on day 12 posttransplantation despite lymphocytic infiltration in all grafts, while at this time all grafts of rat Ig treated control mice were completely rejected with only scar tissue and a few lymphocytes remaining. Additional immunosuppression with 350 rads irradiation had a marked additive effect with AMT-13. Soluble IL-2R levels in the serum of untreated recipients were not elevated compared with normal serum levels, but recipients injected with AMT-13 had multifold increased soluble IL-2R levels. The percentage of IL-2R+ cells in the grafts of AMT-13-treated animals was either normal (less than 5%) or increased (20%) in the additionally irradiated mice, providing strong evidence that the immunosuppressive effect of AMT-13 is not due to a depletion of activated IL-2R+ lymphocytes.

  11. Unraveling the voltage fade mechanism in layer Li-Mn-rich electrode: formation of the tetrahedral cations for spinel conversion

    SciTech Connect (OSTI)

    Mohanty, Debasish [ORNL; Li, Jianlin [ORNL; Abraham, Daniel P [Argonne National Laboratory (ANL); Huq, Ashfia [ORNL; Payzant, E Andrew [ORNL; Wood III, David L [ORNL; Daniel, Claus [ORNL

    2014-01-01

    Discovery of high-voltage layered lithium-and manganese-rich (LMR) composite oxide electrode has dramatically enhanced the energy density of current Li-ion energy storage systems. However, practical usage of these materials is currently not viable because of their inability to maintain a consistent voltage profile (voltage fading) during subsequent charge-discharge cycles. This report rationalizes the cause of this voltage fade by providing the evidence of layer to spinel-like (LSL) structural evolution pathways in the host Li1.2Mn0.55Ni0.15Co0.1O2 LMR composite oxide. By employing neutron powder diffraction, and temperature dependent magnetic susceptibility, we show that LSL structural rearrangement in LMR oxide occurs through a tetrahedral cation intermediate via: i) diffusion of lithium atoms from octahedral to tetrahedral sites of the lithium layer [(LiLioct LiLitet] which is followed by the dispersal of the lithium ions from the adjacent octahedral site of the metal layer to the tetrahedral sites of lithium layer [LiTM oct LiLitet]; and ii) migration of Mn from the octahedral sites of the transition metal layer to the permanent octahedral site of lithium layer via tetrahedral site of lithium layer [MnTMoct MnLitet MnLioct)]. The findings opens the door to the potential routes to mitigate this atomic restructuring in the high-voltage LMR composite oxide cathodes by manipulating the composition/structure for practical use in high-energy-density lithium-ion batteries.

  12. Synthesis and characterization of R{sub 2}MnTiO{sub 7} (R = Y and Er) pyrochlores oxides

    SciTech Connect (OSTI)

    Martnez-Coronado, R.; Alonso, J.A.; Fernndez, M.T.

    2013-09-01

    Graphical abstract: - Abstract: New pyrochlore-like phases of composition R{sub 2}MnTiO{sub 7} (R = Er and Y) have been synthesized by a soft-chemistry procedure involving citrates of the different metal ions followed by thermal treatments at moderate temperatures (850 C for 12 h in air). A characterization by X-ray diffraction and neutron powder diffraction (NPD) has been carried out in order to determine the crystal structure features: these phyrochlores are cubic, space group Fd-3m, defining an intrinsically frustrated three-dimensional system. The Rietveld-refinement from NPD data at room temperature evidences an antisite cation disorder (distribution of Mn between A and B positions) that is accompanied by an increment of the oxygen-vacancy concentration due to the reduction of Mn{sup 4+} at the B position to Mn{sup 2+} at the A position. Thermogravimetric analysis (TGA) was useful to evaluate the stability of these oxides in reducing conditions up to 500 C. Magnetic susceptibility measurements indicate a ferromagnetic behavior, due to the random distribution of Mn{sup 4+} ions in the octahedral sublattice. At lower temperatures there is a polarization of the R{sup +3} magnetic moments, which also participate in the magnetic structure. Aiming to evaluate these materials as possible electrodes for solid oxide fuel cells (SOFC) we determined that the thermal expansion coefficients between 100 and 900 C perfectly match with those of the usual electrolytes; however, these pyrochlore oxides display a semiconductor-like behavior with poor conductivity values, e.g. 6 10{sup ?3} cm{sup ?1} at 850 C for Er, which would prevent its use as MIEC (mixed ionic-electronic conductors) oxides in SOFC devices.

  13. Effect of CoFe insertion in Co{sub 2}MnSi/CoFe/n-GaAs junctions on spin injection properties

    SciTech Connect (OSTI)

    Ebina, Yuya; Akiho, Takafumi; Liu, Hong-xi; Yamamoto, Masafumi; Uemura, Tetsuya, E-mail: uemura@ist.hokudai.ac.jp [Division of Electronics for Informatics, Graduate School of Information Science and Technology, Hokkaido University, Sapporo 060-0814 (Japan)

    2014-04-28

    The CoFe thickness (t{sub CoFe}) dependence of spin injection efficiency was investigated for Co{sub 2}MnSi/CoFe/n-GaAs junctions. The ?V{sub NL}/I value, which is a measure of spin injection efficiency, strongly depended on t{sub CoFe}, where ?V{sub NL} is the amplitude of a nonlocal spin-valve signal, and I is an injection current. Importantly, the maximum value of ?V{sub NL}/I for a Co{sub 2}MnSi/CoFe/n-GaAs junction was one order of magnitude higher than that for a CoFe/n-GaAs junction, indicating that a Co{sub 2}MnSi electrode works as a highly polarized spin source. No clear spin signal, on the other hand, was observed for a Co{sub 2}MnSi/n-GaAs junction due to diffusion of Mn atoms into the GaAs channel. Secondary ion mass spectrometry analysis indicated that the CoFe insertion effectively suppressed the diffusion of Mn into GaAs, resulting in improved spin injection properties compared with those for a Co{sub 2}MnSi/n-GaAs junction.

  14. The role of the (111) texture on the exchange bias and interlayer coupling effects observed in sputtered NiFe/IrMn/Co trilayers

    SciTech Connect (OSTI)

    Castro, I. L.; Nascimento, V. P.; Passamani, E. C.; Takeuchi, A. Y.; Larica, C.; Tafur, M.; Pelegrini, F.

    2013-05-28

    Magnetic properties of sputtered NiFe/IrMn/Co trilayers grown on different seed layers (Cu or Ta) deposited on Si (100) substrates were investigated by magnetometry and ferromagnetic resonance measurements. Exchange bias effect and magnetic spring behavior have been studied by changing the IrMn thickness. As shown by X-ray diffraction, Ta and Cu seed layers provoke different degrees of (111) fcc-texture that directly affect the exchange bias and indirectly modify the exchange spring coupling behavior. Increasing the IrMn thickness, it was observed that the coupling angle between the Co and NiFe ferromagnetic layers increases for the Cu seed system, but it reduces for the Ta case. The results were explained considering (i) different anisotropies of the Co and IrMn layers induced by the different degree of the (111) texture and (ii) the distinct exchange bias set at the NiFe/IrMn and IrMn/Co interfaces in both systems. The NiFe and Co interlayer coupling angle is strongly correlated with both exchange bias and exchange magnetic spring phenomena. It was also shown that the highest exchange bias field occurs when an unstressed L1{sub 2} IrMn structure is stabilized.

  15. Cd{sub 1?x}Mn{sub x}Te ultrasmall quantum dots growth in a silicate glass matrix by the fusion method

    SciTech Connect (OSTI)

    Dantas, Noelio Oliveira; Lima Fernandes, Guilherme de; Almeida Silva, Anielle Christine [Laboratrio de Novos Materiais Isolantes e Semicondutores (LNMIS), Instituto de Fsica, Universidade Federal de Uberlndia, 38408-100 Uberlndia, MG (Brazil); Baffa, Oswaldo; Gmez, Jorge Antnio [Departamento de Fsica, Faculdade de Filosofia, Cincias e Letras de Ribeiro Preto, Universidade de So Paulo, 14040-901 Ribeiro Preto, SP (Brazil)

    2014-09-29

    In this study, we synthesized Cd{sub 1?x}Mn{sub x}Te ultrasmall quantum dots (USQDs) in SiO{sub 2}-Na{sub 2}CO{sub 3}-Al{sub 2}O{sub 3}-B{sub 2}O{sub 3} glass system using the fusion method. Growth of these Cd{sub 1?x}Mn{sub x}Te USQDs was confirmed by optical absorption, atomic force microscopy (AFM), magnetic force microscopy (MFM), scanning transmission electron microscopy (TEM), and electron paramagnetic resonance (EPR) measurements. The blueshift of absorption transition with increasing manganese concentration gives evidence of incorporation of manganese ions (Mn{sup 2+}) in CdTe USQDs. AFM, TEM, and MFM confirmed, respectively, the formation of high quality Cd{sub 1?x}Mn{sub x}Te USQDs with uniformly distributed size and magnetic phases. Furthermore, EPR spectra showed six lines associated to the S?=?5/2 spin half-filled d-state, characteristic of Mn{sup 2+}, and confirmed that Mn{sup 2+} are located in the sites core and surface of the CdTe USQD. Therefore, synthesis of high quality Cd{sub 1?x}Mn{sub x}Te USQDs may allow the control of optical and magnetic properties.

  16. Electrical conductivity anomaly and X-ray photoelectron spectroscopy investigation of YCr{sub 1?x}Mn{sub x}O{sub 3} negative temperature coefficient ceramics

    SciTech Connect (OSTI)

    Zhang, Bo; University of Chinese Academy of Sciences, Beijing 100049 ; Zhao, Qing; Chang, Aimin E-mail: wuy@alfred.edu; Li, Yiyu; Liu, Yin; Wu, Yiquan E-mail: wuy@alfred.edu

    2014-03-10

    Electrical conductivity anomaly of perovskite-type YCr{sub 1?x}Mn{sub x}O{sub 3} negative temperature coefficient (NTC) ceramics produced by spark plasma sintering (SPS) has been investigated by using defect chemistry theory combination with X-ray photoelectron spectroscopy (XPS) analysis. From the results of the ln?-1/T curves and the XPS analysis, it can be considered that YCr{sub 1?x}Mn{sub x}O{sub 3} ceramics exhibit the hopping conductivity. The major carriers in YCrO{sub 3} are holes, which are compensated by the oxygen vacancies produced due to the introduction of Mn ions. The Mn{sup 4+} ion contents increase monotonically in the range of 0.2???x???0.5. The resistivity increases at first and then decreases with increasing Mn contents, which has the same varying tendency with activation energy. The electrical conductivity anomaly appearing in these ceramics may be due to the variation of Cr{sup 4+} and Mn{sup 4+} ions concentration as Mn content changes.

  17. Electric field-induced magnetic switching in Mn:ZnO film

    SciTech Connect (OSTI)

    Ren, S. X.; Sun, G. W.; Zhao, J.; Dong, J. Y.; Zhao, X.; Chen, W.; Wei, Y.; Ma, Z. C.

    2014-06-09

    A large magnetic modulation, accompanied by stable bipolar resistive switching (RS) behavior, was observed in a Mn:ZnO film by applying a reversible electric field. A significant enhancement of the ferromagnetism of the film, to about five times larger than that in the initial (as-grown) state (IS), was obtained by switching the film into the low resistance state. X-ray photoelectron spectroscopy demonstrated the existence of abundant oxygen vacancies in the IS of the film. We suggest that this electric field-induced magnetic switching effect originates with the migration and redistribution of oxygen vacancies during RS. Our work indicates that electric switching is an effective and simple method to increase the ferromagnetism of diluted magnetic oxide films. This provides a promising direction for research in spintronic devices.

  18. Structural controlled magnetic anisotropy in Heusler L1{sub 0}-MnGa epitaxial thin films

    SciTech Connect (OSTI)

    Wang Kangkang; Lu Erdong; Smith, Arthur R.; Knepper, Jacob W.; Yang Fengyuan

    2011-04-18

    Ferromagnetic L1{sub 0}-MnGa thin films have been epitaxially grown on GaN, sapphire, and MgO substrates using molecular beam epitaxy. Using diffraction techniques, the epitaxial relationships are determined. It is found that the crystalline orientation of the films differ due to the influence of the substrate. By comparing the magnetic anisotropy to the structural properties, a clear correlation could be established indicating that the in-plane and out-of-plane anisotropy is directly determined by the crystal orientation of the film and could be controlled via selection of the substrates. This result could be helpful in tailoring magnetic anisotropy in thin films for spintronic applications.

  19. High spin polarization in CoFeMnGe equiatomic quaternary Heusler alloy

    SciTech Connect (OSTI)

    Bainsla, Lakhan; Suresh, K. G.; Nigam, A. K.; Manivel Raja, M.; Varaprasad, B. S. D. Ch. S.; Takahashi, Y. K.; Hono, K.

    2014-11-28

    We report the structure, magnetic property, and spin polarization of CoFeMnGe equiatomic quaternary Heusler alloy. The alloy was found to crystallize in the cubic Heusler structure (prototype LiMgPdSn) with considerable amount of DO{sub 3} disorder. Thermal analysis result indicated the Curie temperature is about 750?K without any other phase transformation up to melting temperature. The magnetization value was close to that predicted by the Slater-Pauling curve. Current spin polarization of P?=?0.70??0.01 was deduced using point contact andreev reflection measurements. The temperature dependence of electrical resistivity has been fitted in the temperature range of 5300?K in order to check for the half metallic behavior. Considering the high spin polarization and Curie temperature, this material appears to be promising for spintronic applications.

  20. Isovector pairing in odd-odd N=Z {sup 50}Mn.

    SciTech Connect (OSTI)

    O'Leary, C. D. O.; Bentley, M. A.; Lenzi, S. M.; Martinez-Pinedo, G.; Warner, D. D.; Bruce, A. M.; Cameron, J. A.; Carpenter, M. P.; Davids, C. N.; Fallon, P.; Frankland, L.; Gelletly, W.; Janssens, R. V. F.; Joss, D. T.; Lister, C. J.; Regan, P. H.; Reiter, P.; Rubio, B.; Seweryniak, D.; Svensson, C. E.; Vincent, S. M.; Williams, S. J.; Physics; Univ. of York; Univ. of Liverpool; Keele Univ.; Dipartimento di Fisica dell'Universit and INFN; Univ. Basel; CLRC Daresbury Lab.; Univ. of Brighton; McMaster Univ.; LBNL; Univ. of Surrey; CSIC-Uni.

    2002-01-17

    High-spin states in the odd-odd N=Z nucleus {sup 50}{sub 25}Mn have been investigated. A sequence of states up to J{sup {pi}}=6{sup +} has been assigned as the T=1 analogue of the yrast band in {sup 50}{sub 24}Cr for the first time. The differences in energy between levels in these bands are interpreted in terms of rotational alignments and the effect they have on the Coulomb energy of the nucleus. Comparisons with shell model calculations show that the Coulomb energy difference between the T=1 analogue structures is an important indicator of the competition between isovector pairing modes in N=Z nuclei and their isobars.