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


1

Significance of Semivolatile Diesel Exhaust Organics for Secondary HONO Formation  

Science Journals Connector (OSTI)

The atmospheric origin of nitrous acid (HONO) is largely unknown despite its estimated importance as an OH source during daytime due to its rapid photolysis. Recently, primary HONO contained in automobile exhaust as well as secondary HONO formation on ...

Lukas Gutzwiller; Frank Arens; Urs Baltensperger; Heinz W. Gäggeler; Markus Ammann

2002-01-12T23:59:59.000Z

2

NEW MAGNETIC MATERIALS  

Science Journals Connector (OSTI)

New, sophisticated magnetic materials can be found as essential components in computers, sensors, and actuators, and in a variety of telecommunications devices ranging from telephones to satellites. Some of th...

STANOJA STOIMENOV

2006-01-01T23:59:59.000Z

3

Superconductivity and Magnetism: Materials Properties  

E-Print Network (OSTI)

#12;#12;Superconductivity and Magnetism: Materials Properties and Developments #12;Copyright 2003 and Magnetism: Materials Properties and Developments Extended abstracts of the 24th Risø International Symposium LABORATORY ROSKILDE, DENMARK #12;Risø International Symposium on Superconductivity and Magnetism: Material

4

Soft Magnetic Materials in Telecommunications  

Science Journals Connector (OSTI)

... , the subject being "Soft Magnetic Materials whose Properties are of Use or Significance in Telecommunications". The meetings were attended by about seventy people from Great Britain and the Continent ... for a few papers which dealt with aspects of the matter not generally considered by telecommunications engineers, the authors concentrated on the following main lines : theoretical consequences of domain ...

1952-05-31T23:59:59.000Z

5

Cryogenic structural materials for superconducting magnets  

SciTech Connect

This paper reviews research in the United States and Japan on structural materials for high-field superconducting magnets. Superconducting magnets are used for magnetic fusion energy devices and for accelerators that are used in particle-physics research. The cryogenic structural materials that we review are used for magnet cases and support structures. We expect increased materials requirements in the future.

Dalder, E.N.C.; Morris, J.W. Jr.

1985-02-22T23:59:59.000Z

6

Background Material Important Questions about Magnetism  

E-Print Network (OSTI)

Background Material Important Questions about Magnetism: 1) What is Magnetism?Magnetism is a force or repulsion due to charge is called the electric force. But what about magnetism, is there a fundamental property of some matter that makes things magnetic? The answer is: "sort of." Electric current

Mojzsis, Stephen J.

7

MagLab - Magnets and Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

NSF highlights here. Magnets and materials go hand-in-hand, as the push for ever higher magnetic fields requires not just engineering excellence with what is already available,...

8

Static High Magnetic Fields and Materials Science  

Science Journals Connector (OSTI)

Like temperature or pressure, the magnetic field is one of the important thermodynamic parameters that are used to change the inner energies of materials. Materials are essentially composed of atomic nuclei an...

M. Motokawa; K. Watanabe; F. Herlach

2002-01-01T23:59:59.000Z

9

Magnetic Filtration Process, Magnetic Filtering Material, and...  

NLE Websites -- All DOE Office Websites (Extended Search)

SummaryORNL researchers developed a new method for filtering materials and managing wastewater. This invention offers an integrated, intensified process to handle organic...

10

Journal of Magnetism and Magnetic Materials 252 (2002) 159161 Magnetically induced alignment of FNS  

E-Print Network (OSTI)

Journal of Magnetism and Magnetic Materials 252 (2002) 159­161 Magnetically induced alignment the observation of magnetically controlled anchoring of ferro-nematic suspensions. We found that application of a weak magnetic field to a cell with the ferro-suspension induces an easy orientation axis with weak

Reznikov, Yuri

11

Journal of Magnetism and Magnetic Materials 225 (2001) 337345 Irreversible magnetization in nickel nanoparticles  

E-Print Network (OSTI)

in this magnetic nanoparticle system. # 2001 Elsevier Science B.V. All rights reserved. PACS: 75.10.Nr; 75.50.KjJournal of Magnetism and Magnetic Materials 225 (2001) 337­345 Irreversible magnetization in nickel in revised form 20 October 2000 Abstract We report magnetic studies on nickel nanoparticle films of average

Zuo, Fulin

12

Magnetism and magnetic materials probed with neutron scattering  

Science Journals Connector (OSTI)

Abstract Neutron scattering techniques are becoming increasingly accessible to a broader range of scientific communities, in part due to the onset of next-generation, high-power spallation sources, high-performance, sophisticated instruments and data analysis tools. These technical advances also advantageously impact research into magnetism and magnetic materials, where neutrons play a major role. In this Current Perspective series, the achievements and future prospects of elastic and inelastic neutron scattering, polarized neutron reflectometry, small angle neutron scattering, and neutron imaging, are highlighted as they apply to research into magnetic frustration, superconductivity and magnetism at the nanoscale.

S.G.E. te Velthuis; C. Pappas

2014-01-01T23:59:59.000Z

13

Final Technical Progress Report NANOSTRUCTURED MAGNETIC MATERIALS  

SciTech Connect

This report describes progress made during the final phase of our DOE-funded program on Nanostructured Magnetic Materials. This period was quite productive, resulting in the submission of three papers and presentation of three talks at international conferences and three seminars at research institutions. Our DOE-funded research efforts were directed toward studies of magnetism at surfaces and interfaces in high-quality, well-characterized materials prepared by Molecular Beam Epitaxy (MBE) and sputtering. We have an exceptionally well-equipped laboratory for these studies, with: Thin film preparation equipment; Characterization equipment; Equipment to study magnetic properties of surfaces and ultra-thin magnetic films and interfaces in multi-layers and superlattices.

Charles M. Falco

2012-09-13T23:59:59.000Z

14

Journal of Magnetism and Magnetic Materials 290291 (2005) 836838 Dynamic response limits of an elastic magnet  

E-Print Network (OSTI)

on the elastomagnetic coupling but also on the interaction among the microparticles magnetic moments depending as for possible applications [1,2]. When the magnetic particles are permanently magnetized and the matrix material. Bar shaped samples have been produced with the permanent magnetic moments preferentially oriented

Franzese, Giancarlo

15

Diamond Beamline I16 (Materials and Magnetism)  

SciTech Connect

We describe the key features and performance specifications of a facility for high-resolution single-crystal x-ray diffraction at Diamond Light Source. The scientific emphasis of the beamline is materials- and x-ray-physics, including resonant and magnetic scattering. We highlight some of the more novel aspects of the beamline design.

Collins, S. P.; Bombardi, A.; Marshall, A. R.; Williams, J. H.; Barlow, G.; Day, A. G.; Pearson, M. R.; Woolliscroft, R. J.; Walton, R. D.; Beutier, G.; Nisbet, G. [Diamond Light Source Ltd, Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE (United Kingdom)

2010-06-23T23:59:59.000Z

16

Magnetism in Non-Traditional Materials  

SciTech Connect

We performed a systematic microscopic investigation of two completely dissimilar materials (namely, ZnO and rhombohedral-C{sub 60} polymers) exhibiting ferromagnetism in the presence of defects, and showed that this new phenomena has a common origin and the mechanism responsible can be used as a powerful tool for inducing and tailoring magnetic features in systems which are not magnetic otherwise. Based on our findings we proposed a general recipe for developing ferromagnetism in new materials of great technological interest. Our results support the role of complimentary pairs of defects in inducing magnetism in otherwise non-magnetic materials belonging to two widely differing classes with no apparent correlation between them. In both classes, ferromagnetism is found to be enhanced when the two kinds of defects form structures (pathways) of alternating effective donor and acceptor crystal sites leading to the development of electron charge and spin density like waves. Using ab initio density functional theory calculations we predicted the existence of a new class of carbon cages formed via hybrid connection between planar graphene sheets and carbon nanotubes. The resulting novel structure has the appearance of ?nano-drum? and offers the exciting prospect of integrating useful device properties of both graphene as well as the nanotube into a single unit with tunable electronic properties. Creation of a hexagonal hole in the graphene portion of this structure results in significant magnetic moments for the edge atoms. The structure appears to be capable of sustaining ferrimagnetic state with the assistance of topological defects. The charge and spin distributions obtained in our calculations for the nano-drums are in striking contrast to those in planar graphene nanoribbons with a central hole. In this case, the central hole appears as the complimentary defect to those of the ribbon edges. Similar situation is found in case of the nano-drum in which the complimentary to the hole defects appear to be the pentagons along the curved surface of the drum. Charge oscillations found in the nano-drum are minimized in the nanoribbons. But more importantly, the hole edge atoms in the nano-drums retain significant magnetic moments; almost twice those of the corresponding ones in hydrogenated graphene nanoribbons (H-GNRs). These results suggest that the topological defects in the nano-drums may act like blocks to keep magnetic moments from ?leaking? out from the hole defects. This may have significant implications for the the use of nano-drums in magnetic storage technology where the ratio, magnetic-moment/weight, is of paramount importance in any futuristic device applications. One of the basic problems of the DFT/LSDA+U theory is the efficient evaluation of the U-term. With this in mind we proposed an alternative approach for its calculation which is based on the knowledge of the Hartree-Fock wave functions of the system under consideration. As a result, the proposed approach is closer to the basic definition of the DFT/LSDA+U scheme and its hybrid-DFT nature. According to our approach, the U value is obtained in a consistent and ab-initio way using the self-consistently calculated wave functions of the given system at the level of the HF approximation. Our method is applicable for systems which include more than one type of elements with localized d-orbitals. The method has been applied the case of the doped Zn(Co)O systems successfully. Currently, theories based on conventional superexchange or double-exchange interactions cannot explain long range magnetic order at concentrations below percolation threshold in dilute magnetic semiconductors. On the other hand, the codoping induced magnetism, which can justify magnetic interactions below percolation threshold, has eluded explanation. With this in mind, we proposed that defect-induced magnetism in codoped non-magnetic materials can be viewed within a molecular generalization of the atomic double-exchange and superexchange interactions applied to an arbitrary bipartite lattice host

Menon, Madhu

2013-09-17T23:59:59.000Z

17

REACT: Alternatives to Critical Materials in Magnets  

SciTech Connect

REACT Project: The 14 projects that comprise ARPA-E’s REACT Project, short for “Rare Earth Alternatives in Critical Technologies”, are developing cost-effective alternatives to rare earths, the naturally occurring minerals with unique magnetic properties that are used in electric vehicle (EV) motors and wind generators. The REACT projects will identify low-cost and abundant replacement materials for rare earths while encouraging existing technologies to use them more efficiently. These alternatives would facilitate the widespread use of EVs and wind power, drastically reducing the amount of greenhouse gases released into the atmosphere.

None

2012-01-01T23:59:59.000Z

18

Journal of Magnetism and Magnetic Materials 281 (2004) 272275 Effects of high magnetic field annealing on texture and  

E-Print Network (OSTI)

Journal of Magnetism and Magnetic Materials 281 (2004) 272­275 Effects of high magnetic field annealing on texture and magnetic properties of FePd D.S. Lia, *, H. Garmestania , Shi-shen Yanb , M of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Dr. N.W., Atlanta, GA

Garmestani, Hamid

19

Thermal Stability of MnBi Magnetic Materials. | EMSL  

NLE Websites -- All DOE Office Websites (Extended Search)

MnBi attracts great attention in recent years for its great potential as permanent magnet materials. It is unique because its coercivity increases with increasing temperature,...

20

Journal of Magnetism and Magnetic Materials 286 (2005) 324328 Light-free magnetic resonance force microscopy for studies of  

E-Print Network (OSTI)

Journal of Magnetism and Magnetic Materials 286 (2005) 324­328 Light-free magnetic resonance force for Physical Sciences, College Park, MD, USA Available online 4 November 2004 Abstract Magnetic resonance force microscopy is a scanned probe technique capable of three-dimensional magnetic resonance imaging. Its

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


21

National High Magnetic Field Laboratory - Magnets and Materials...  

NLE Websites -- All DOE Office Websites (Extended Search)

Applied Superconductivity Center, please see the center's group members page. Magnet Science & Technology Group Members Senior Personnel Bai, Hongyu Research Faculty II Phone:...

22

National High Magnetic Field Laboratory - Magnets and Materials...  

NLE Websites -- All DOE Office Websites (Extended Search)

which joined the Magnet Lab and Florida State University in 2006. The ASC advances the science and technology of superconductivity by investigating low temperature and high...

23

Magnetic refrigeration apparatus with belt of ferro or paramagnetic material  

DOE Patents (OSTI)

A magnetic refrigerator operating in the 12 to 77 K range utilizes a belt which carries ferromagnetic or paramagnetic material and which is disposed in a loop which passes through the center of a solenoidal magnet to achieve cooling. The magnetic material carried by the belt, which can be blocks in frames of a linked belt, can be a mixture of substances with different Curie temperatures arranged such that the Curie temperatures progressively increase from one edge of the belt to the other. This magnetic refrigerator can be used to cool and liquefy hydrogen or other fluids.

Barclay, J.A.; Stewart, W.F.; Henke, M.D.; Kalash, K.E.

1986-04-03T23:59:59.000Z

24

National High Magnetic Field Laboratory - Magnets and Materials...  

NLE Websites -- All DOE Office Websites (Extended Search)

W.D. and Weijers, H.W., Helium gas bubble trapped in liquid helium in high magnetic field, Appl. Phys. Lett., 104, 133511 (2014) read online 2 Bai, H.; Marshall, W.S.; Bird,...

25

Nonlinear Vibration Energy Harvesting with High-Permeability Magnetic Materials  

Science Journals Connector (OSTI)

In this chapter, we introduce the recent demonstrations of high energy density nonlinear vibration energy harvesting with high-permeability magnetic materials, which show great promise for compact and wideband vi...

Xing Xing; Nian X. Sun

2013-01-01T23:59:59.000Z

26

Argonne CNM: Electronic and Magnetic Materials and Devices Research  

NLE Websites -- All DOE Office Websites (Extended Search)

Electronic & Magnetic Materials & Devices Electronic & Magnetic Materials & Devices Group Leader: Saw-Wai Hla The objective of the Electronic and Magnetic Materials and Devices (EMMD) group at the CNM is to discover, understand, and utilize new electron and spin-based materials and phenomena in constrained geometries. Potential benefits include reduced power dissipation, new medical imaging methods and therapies, improved efficiency of data storage by spin current and electrical field-assisted writing, and enhanced energy conversion in photovoltaic devices. Research Activities Understanding complex magnetic order and coupling phenomena: Magnetic nanostructures are prone to complex magnetic ordering phenomena that do not occur in the bulk and that will have strong impact on the further development of functional magnetic nanostructures. Basic science on the influence of demagnetizing effects, geometrical frustration, next-nearest neighbor exchange interactions, unusual anisotropy values, and the spin-orbit interaction at reduced dimensionality are performed with a special focus on temperature-dependent magnetic order-disorder transitions.

27

Exploring nanoscale magnetism in advanced materials with polarized X-rays  

E-Print Network (OSTI)

Stoehr and H.C. Siegmann, „Magnetism”, Springer (2006) [93]Exploring nanoscale magnetism in advanced materials withABSTRACT Nanoscale magnetism is of paramount scientific

Fischer, Peter

2012-01-01T23:59:59.000Z

28

Materials science: Radicals promote magnetic gel assembly  

Science Journals Connector (OSTI)

... are assembled from smaller components, may thus be better suited for replicating biological complexity. 3D printing, in which the direct deposition of material creates precise 3D structures, embodies this strategy ... material creates precise 3D structures, embodies this strategy. Recent advances in technology have allowed 3D printing of tissues through the deposition of cellular aggregates or cell-laden materials. However, these ...

Christopher B. Rodell; Jason A. Burdick

2014-10-29T23:59:59.000Z

29

Digital lock-in detection of site-specific magnetism in magnetic materials  

DOE Patents (OSTI)

The polarization and diffraction characteristics of x-rays incident upon a magnetic material are manipulated to provide a desired magnetic sensitivity in the material. The contrast in diffracted intensity of opposite helicities of circularly polarized x-rays is measured to permit separation of magnetic signals by element type and by atomic environment. This allows for the direct probing of magnetic signals from elements of the same species in nonequivalent atomic environments to better understand the behavior and characteristics of permanent magnetic materials. By using known crystallographic information together with manipulation of the polarization of x-rays having energies tuned near element-specific electronic excitations and by detecting and comparing the incident and diffracted photons at the same frequency, more accurate magnetic measurements can be made over shorter observation periods.

Haskel, Daniel (Naperville, IL); Lang, Jonathan C. (Naperville, IL); Srajer, George (Oak Park, IL)

2008-07-22T23:59:59.000Z

30

Crystallographic Boundary in a Magnetic Shape Memory Material  

NLE Websites -- All DOE Office Websites (Extended Search)

Crystallographic Boundary in a Crystallographic Boundary in a Magnetic Shape Memory Material Crystallographic Boundary in a Magnetic Shape Memory Material Print Wednesday, 18 April 2012 11:37 A research team has shown the existence of a special structural boundary in an intermetallic compound by combining the unique measurement facilities at the ALS, the single-crystal production capabilities of Tohoku University (Japan), and the materials science expertise of Johannes-Gutenberg-University (Germany). Conventional shape memory materials, such as the commercially available Nitinol (an alloy of nickel and titanium used in microsensing, actuation, and medical devices), undergo a phase transformation with cooling or heating when large areas of a sample distort along a single axis, and where the atomic-unit cell "stretching" from a cube to a rectangular prism occurs. In contrast, magnetic shape memory (MSM) materials are much more rare but have an advantage: The axis of magnetic anisotropy is coupled to the direction of stretching, so a perfect MSM crystal can be made to flex and bend reversibly by applying an external magnetic field.

31

Materials Physics Applications: The National High Magnetic Field Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Search Search National High Magnetic Field Laboratory, NHMFL Home About Us Organization DIVISION Materials Physics and Applications Division GROUPS Superconductivity Technology Center Condensed Matter and Magnet Science Center for Integrated Nanotechnologies Sensors & Electrochemical Devices Materials Chemistry CONTACTS Group Leader Mike Hundley Director, NHMFL-PFF/Deputy Group Leader Chuck Mielke Head of Users Program Operations Jon Betts Professional Staff Assistant Julie T. Gallegos TA-03 Group Office TA-03, Building 0034, Room 101 Office Administrator Juanita Armijo TA-35 Group Office TA-35, Building 0127, Room C117 Office Administrator Angeline Willow 505-667-5032 National High Magnetic Field Laboratory, Pulsed Field Facility The Pulsed Field Facility at Los Alamos National Laboratory in Los Alamos, New Mexico, is one of three campuses of the National High Magnetic Field Laboratory (NHMFL), the other two being at Florida State University, Tallahassee (continuous fields, magnetic resonance, and general headquarters) and the University of Florida ,Gainesville(ultra-low temperatures at high magnetic fields). The NHMFL is sponsored primarily by the National Science Foundation, Division of Materials Research, with additional support from the State of Florida and the US Department of Energy.

32

Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

2 MAG LAB REPORTS Volume 18 No. 1 CONDENSED MATTER SCIENCE Technique development, graphene, magnetism & magnetic materials, topological insulators, quantum fl uids & solids,...

33

A Simple Apparatus for the Direct Measurement of Magnetic Forces and Magnetic Properties of Materials  

E-Print Network (OSTI)

In this paper, we describe a simple apparatus consisting of a scale, capable of a one milligram resolution, and a commonly obtainable magnet to measure magnetic forces. This simple apparatus is capable of measuring magnetic properties of materials in either a research or an instructional laboratory. We illustrate the capability of this apparatus by the measurement of the force of iron samples exerted on the magnet, the force of a paramagnetic sample, that by a current carrying wire, and the force of a high temperature superconductor.

Makkinje, Jan A

2014-01-01T23:59:59.000Z

34

Thermal stability of MnBi magnetic materials  

SciTech Connect

MnBi has attracted much attention in recent years due to its potential as a rare-earth-free permanent magnet material. It is unique because its coercivity increases with increasing temperature, which makes it a good hard phase material for exchange coupling nanocomposite magnets. MnBi phase is difficult to obtain, partly because the reaction between Mn and Bi is peritectic, and partly because Mn reacts readily with oxygen. MnO formation is irreversible and harmful to magnet performance. In this paper, we report our efforts toward developing MnBi permanent magnets. To date, high purity MnBi (>90%) can be routinely produced in large quantities. The produced powder exhibits 74:6 emu g1 saturation magnetization at room temperature with 9 T applied field. After proper alignment, the maximum energy product (BH) max of the powder reached 11.9 MGOe, and that of the sintered bulk magnet reached 7.8 MGOe at room temperature. A comprehensive study of thermal stability shows that MnBi powder is stable up to 473 K in air.

Cui, Jinfang [Pacific Northwest National Laboratory; Choi, J. P. [Pacific Northwest National Laboratory; Li, G. [Pacific Northwest National Laboratory; Polikarpov, E. [Pacific Northwest National Laboratory; Darsell, J. [Pacific Northwest National Laboratory; Overman, N. [Pacific Northwest National Laboratory; Olszta, M. [Pacific Northwest National Laboratory; Schreiber, D. [Pacific Northwest National Laboratory; Bowden, M. [Environmental Molecular Sciences Laboratory; Droubay, T. [Pacific Northwest National Laboratory; Kramer, Matthew J. [Ames Laboratory; Zarkevich, Nikolay A. [Ames Laboratory; Wang, L L. [Ames Laboratory; Johnson, Duane D. [Ames Laboratory; Marinescu, M. [Electron Energy Corporation; Takeuchi, I. [University of Maryland; Huang, Q. Z. [National Institute of Standards and Technology; Wu, H. [University of Maryland; Reeve, H. [United Technologies Research Center; Vuong, N. V. [University of Texas; Liu, J P. [University of Texas

2014-01-27T23:59:59.000Z

35

How Does the Distribution of External Magnetic Lines of Force Influence the Growth of Ferromagnetic Material?  

Science Journals Connector (OSTI)

As one of the most important ferromagnetic materials, nickel shows applications in many fields including catalysis,(15) magnet sensors,(16) magnetic recording media,(17) conduction materials,(18) and ferrofluids. ... When an external magnetic field is applied, the directions of the self-generated magnetic fields could be adjusted to be the same by the external magnetic field, conducing one-dimensional structures along the external magnetic lines of force. ... Since these quasi-one-dimensional magnets are parallel to each other, the interaction caused by the self-generated magnetic fields between the quasi-one-dimensional magnets which are aligned in different magnetic lines of force could be ignored. ...

Rui-Ping Ji; Ji-Sen Jiang; Ming Hu

2010-06-28T23:59:59.000Z

36

Ultra-low field nuclear magnetic resonance and magnetic resonance imaging to discriminate and identify materials  

DOE Patents (OSTI)

An ultra-low magnetic field NMR system can non-invasively examine containers. Database matching techniques can then identify hazardous materials within the containers. Ultra-low field NMR systems are ideal for this purpose because they do not require large powerful magnets and because they can examine materials enclosed in conductive shells such as lead shells. The NMR examination technique can be combined with ultra-low field NMR imaging, where an NMR image is obtained and analyzed to identify target volumes. Spatial sensitivity encoding can also be used to identify target volumes. After the target volumes are identified the NMR measurement technique can be used to identify their contents.

Kraus, Robert H. (Los Alamos, NM); Matlashov, Andrei N. (Los Alamos, NM); Espy, Michelle A. (Los Alamos, NM); Volegov, Petr L. (Los Alamos, NM)

2010-03-30T23:59:59.000Z

37

Liquid metal MHD studies with non-magnetic and ferro-magnetic structural material  

Science Journals Connector (OSTI)

Abstract In most of the liquid metal MHD experiments reported in the literature to study liquid breeder blanket performance, SS316/SS304 grade steels are used as the structural material which is non-magnetic. On the other hand, the structural material for fusion blanket systems has been proposed to be ferritic martensitic grade steel (FMS) which is ferromagnetic in nature. In the recent experimental campaign, liquid metal MHD experiments have been carried out with two identical test sections: one made of SS316L (non-magnetic) and another with SS430 (ferromagnetic), to compare the effect of structural materials on MHD phenomena for various magnetic fields (up to 4 T). The maximum Hartmann number and interaction number are 1047 and 300, respectively. Each test section consists of square channel (25 mm × 25 mm) cross-section with two U bends, with inlet and outlet at the middle portion of two horizontal legs, respectively. Pb–Li enters into the test section through a square duct and distributed into two parallel paths through a partition plate. In each parallel path, it travels ?0.28 m length in plane perpendicular to the magnetic field and faces two 90° bends before coming out of the test section through a single square duct. The wall electrical potential and MHD pressure drop across the test sections are compared under identical experimental conditions. Similar MHD behavior is observed with both the test section at higher value of the magnetic field (>2 T).

A. Patel; R. Bhattacharyay; P.K. Swain; P. Satyamurthy; S. Sahu; E. Rajendrakumar; S. Ivanov; A. Shishko; E. Platacis; A. Ziks

2014-01-01T23:59:59.000Z

38

Journal of Magnetism and Magnetic Materials 293 (2005) 578583 Theoretical comparison of magnetic and hydrodynamic  

E-Print Network (OSTI)

Ã?, Mikkel Fougt Hansen, Henrik Bruus MIC--Department of Micro and Nanotechnology, Technical University). #12;inhomogeneous magnetic field created by micro- structures that are magnetized by either electro wish to highlight the importance of hydro- dynamic interactions in connection with bead capturing

39

Apparatus for magnetic separation of paramagnetic and diamagnetic material  

DOE Patents (OSTI)

The present invention relates to methods and apparatus for segregating paramagnetic from diamagnetic particles in particulate material and, in particular, to the open gradient magnetic separation of ash producing components and pyritic sulfur from coal. The apparatus includes a vertical cylinder and a rotatable vertical screw positioned within the cylinder, the screw having a helical blade angled downwardly and outwardly from the axis. Rotation of the vertical screw causes denser particles, which in the case of coal include pyritic sulfur and ash, which are paramagnetic, to migrate to the outside of the screw, and less dense particles, such as the low sulfur organic portion of the coal, which are diamagnetic, to migrate towards the center of the screw. A vibration mechanism attached to the screw causes the screw to vibrate during rotation, agitating and thereby accommodating further segregation of the particles. An open gradient magnetic field is applied circumferentially along the entire length of the screw by a superconducting quadropole magnet. The open gradient magnetic field further segregates the paramagnetic particles from the diamagnetic particles. The paramagnetic particles may then be directed from the cylinder into a first storage bin, and the diamagnetic particles, which are suitable for relatively clean combustion, may be directed into a second storage bin.

Doctor, Richard D. (Glen Ellyn, IL)

1988-01-01T23:59:59.000Z

40

Magnetic preferential orientation of metal oxide superconducting materials  

DOE Patents (OSTI)

A superconductor comprised of a polycrystalline metal oxide such as YBa[sub 2]Cu[sub 3]O[sub 7[minus]X] (where 0 < X < 0.5) exhibits superconducting properties and is capable of conducting very large current densities. By aligning the two-dimensional Cu-O layers which carry the current in the superconducting state in the a- and b-directions, i.e., within the basal plane, a high degree of crystalline axes alignment is provided between adjacent grains permitting the conduction of high current densities. The highly anisotropic diamagnetic susceptibility of the polycrystalline metal oxide material permits the use of an applied magnetic field to orient the individual crystals when in the superconducting state to substantially increase current transport between adjacent grains. In another embodiment, the anisotropic paramagnetic susceptibility of rare-earth ions substituted into the oxide material is made use of as an applied magnetic field orients the particles in a preferential direction. This latter operation can be performed with the material in the normal (non-superconducting) state. 4 figs.

Capone, D.W.; Dunlap, B.D.; Veal, B.W.

1990-07-17T23:59:59.000Z

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


41

Magnetic preferential orientation of metal oxide superconducting materials  

DOE Patents (OSTI)

A superconductor comprised of a polycrystalline metal oxide such as YBa.sub.2 Cu.sub.3 O.sub.7-X (where 0material permits the use of an applied magnetic field to orient the individual crystals when in the superconducting state to substantially increase current transport between adjacent grains. In another embodiment, the anisotropic paramagnetic susceptibility of rare-earth ions substituted into the oxide material is made use of as an applied magnetic field orients the particles in a preferential direction. This latter operation can be performed with the material in the normal (non-superconducting) state.

Capone, Donald W. (Bolingbrook, IL); Dunlap, Bobby D. (Bolingbrook, IL); Veal, Boyd W. (Downers Grove, IL)

1990-01-01T23:59:59.000Z

42

Applications of high throughput (combinatorial) methodologies to electronic, magnetic, optical, and energy-related materials  

E-Print Network (OSTI)

materials science for electronic, magnetic, optical, and energy-related materials. It is expected that high, and energy-related materials Martin L. Green, Ichiro Takeuchi, and Jason R. Hattrick-Simpers Citation: J) methodologies to electronic, magnetic, optical, and energy-related materials Martin L. Green,1 Ichiro Takeuchi,2

Rubloff, Gary W.

43

Development of Superconducting Materials for Use in Magnet Applications: Nb3Sn Flux Pinning and Bi-2212 Magnetic Texturing  

E-Print Network (OSTI)

DEVELOPMENT OF SUPERCONDUCTING MATERIALS FOR USE IN MAGNET APLICATIONS: Nb3Sn FLUX PINING AND Bi-212 MAGNETIC TEXTURING Major: Physics April 2010 Submitted to the Office of Undergraduate Research Texas A&M University... in partial fulfillment of the requirements for the designation as UNDERGRADUATE RESEARCH SCHOLAR A Senior Scholars Thesis by DAVID GABRIEL RAHMANI DEVELOPMENT OF SUPERCONDUCTING MATERIALS FOR USE IN MAGNET APLICATIONS: Nb3Sn FLUX...

Rahmani, David G.

2010-07-14T23:59:59.000Z

44

Argonne CNM: Electronic & Magnetic Materials & Devices Capabilities  

NLE Websites -- All DOE Office Websites (Extended Search)

Electronic & Magnetic Materials & Devices Capabilities Synthesis Colloidal chemistry and self-assembly techniques Complex oxide film synthesis via molecular beam epitaxy (DCA R450 Custom) Physical vapor deposition (Lesker CMS 18 and PVD 250) Spin coating (Laurell WS-400) Characterization Variable-temperature (VT) scanning tunneling microscope with atomic force microscopy capabilities (Omicron VT-AFM/STM), operates in an ultrahigh vacuum (UHV) environment with a base pressure of < 1E-10 mbar and 55-400 K. Atomic resolution is routinely obtained at room temperature and below. The AFM capabilities support a range of scanning modes. The analysis chamber also houses a LEED/Auger with an attached preparation chamber for sample cleaning and deposition (sputter cleaning, direct current heating, e-beam heating stage, metal deposition, etc.)

45

Novel Magnetic Materials Including Organic I S. Shaheen, Chairman Magnetic ordering in M,,ox...,,bpy... system ,,MFe, Co, Ni; oxC2O4  

E-Print Network (OSTI)

Novel Magnetic Materials Including Organic I S. Shaheen, Chairman Magnetic ordering in M of the magnetization have been measured to investigate the magnetic properties of the first oxalate­bpy mixed , in which the magnetic M ions form one-dimensional chains along the a axis. Spontaneous magnetic orderings

Li, Jing

46

Magnetic mesoporous material for the sequestration of algae  

DOE Patents (OSTI)

The present invention provides a magnetic mesoporous nanoparticle that includes a mesoporous silicate nanoparticle and iron oxide. The present invention also provides a method of using magnetic mesoporous nanoparticles to sequester microorganisms from a media.

Trewyn, Brian G.; Kandel, Kapil; Slowing, Igor Ivan; Lee, Show-Ling

2014-09-09T23:59:59.000Z

47

Monte Carlo Study of the Spin Transport in Magnetic Materials , K. Akablia,b  

E-Print Network (OSTI)

Monte Carlo Study of the Spin Transport in Magnetic Materials Y. Magnina , K. Akablia,b , H. T of Natural Science and Technology, Okayama University 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan.. Abstract The resistivity in magnetic materials has been theoretically shown to depend on the spin

48

Magnetic Shape Memory Alloys as smart materials for micro-positioning devices , N. Calchand1  

E-Print Network (OSTI)

Magnetic Shape Memory Alloys as smart materials for micro-positioning devices A. Hubert1 , N reports recent results obtained using a new type of smart material called Magnetic Shape Memory Alloy-mail: arnaud.hubert@femto-st.fr Abstract In the field of microrobotics, actuators based on smart ma- terials

Paris-Sud XI, Université de

49

Iron-Nickel-Based SuperMagnets: Multiscale Development of L10 Materials for Rare Earth-Free Permanent Magnets  

SciTech Connect

REACT Project: Northeastern University will develop bulk quantities of rare-earth-free permanent magnets with an iron-nickel crystal structure for use in the electric motors of renewable power generators and EVs. These materials could offer magnetic properties that are equivalent to today’s best commercial magnets, but with a significant cost reduction and diminished environmental impact. This iron-nickel crystal structure, which is only found naturally in meteorites and developed over billions of years in space, will be artificially synthesized by the Northeastern University team. Its material structure will be replicated with the assistance of alloying elements introduced to help it achieve superior magnetic properties. The ultimate goal of this project is to demonstrate bulk magnetic properties that can be fabricated at the industrial scale.

None

2012-01-01T23:59:59.000Z

50

A New Class of Magnetic Materials with Novel Structural Order | U.S. DOE  

NLE Websites -- All DOE Office Websites (Extended Search)

A New Class of Magnetic Materials with Novel Structural Order A New Class of Magnetic Materials with Novel Structural Order Basic Energy Sciences (BES) BES Home About Research Facilities Science Highlights Benefits of BES Funding Opportunities Basic Energy Sciences Advisory Committee (BESAC) News & Resources Contact Information Basic Energy Sciences U.S. Department of Energy SC-22/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-3081 F: (301) 903-6594 E: sc.bes@science.doe.gov More Information » June 2013 A New Class of Magnetic Materials with Novel Structural Order The discovery of the first binary magnetic quasicrystals will enable the unraveling of the fundamental relationship between the structure and magnetism in aperiodic materials. Print Text Size: A A A Subscribe FeedbackShare Page

51

Final Scientific/Technical Report for DOE/EERE project Advanced Magnetic Refrigerant Materials  

SciTech Connect

A team led by GE Global Research developed new magnetic refrigerant materials needed to enhance the commercialization potential of residential appliances such as refrigerators and air conditioners based on the magnetocaloric effect (a nonvapor compression cooling cycle). The new magnetic refrigerant materials have potentially better performance at lower cost than existing materials, increasing technology readiness level. The performance target of the new magnetocaloric material was to reduce the magnetic field needed to achieve 4 °C adiabatic temperature change from 1.5 Tesla to 0.75 Tesla. Such a reduction in field minimizes the cost of the magnet assembly needed for a magnetic refrigerator. Such a reduction in magnet assembly cost is crucial to achieving commercialization of magnetic refrigerator technology. This project was organized as an iterative alloy development effort with a parallel material modeling task being performed at George Washington University. Four families of novel magnetocaloric alloys were identified, screened, and assessed for their performance potential in a magnetic refrigeration cycle. Compositions from three of the alloy families were manufactured into regenerator components. At the beginning of the project a previously studied magnetocaloric alloy was selected for manufacturing into the first regenerator component. Each of the regenerators was tested in magnetic refrigerator prototypes at a subcontractor at at GE Appliances. The property targets for operating temperature range, operating temperature control, magnetic field sensitivity, and corrosion resistance were met. The targets for adiabatic temperature change and thermal hysteresis were not met. The high thermal hysteresis also prevented the regenerator components from displaying measurable cooling power when tested in prototype magnetic refrigerators. Magnetic refrigerant alloy compositions that were predicted to have low hysteresis were not attainable with conventional alloy processing methods. Preliminary experiments with rapid solidification methods showed a path towards attaining low hysteresis compositions should this alloy development effort be continued.

Johnson, Francis

2014-06-30T23:59:59.000Z

52

Use of magnetic carbon composites from renewable resource materials for oil spill clean up and recovery  

DOE Patents (OSTI)

A method for separating a liquid hydrocarbon material from a body of water. In one embodiment, the method includes the steps of mixing a plurality of magnetic carbon-metal nanocomposites with a liquid hydrocarbon material dispersed in a body of water to allow the plurality of magnetic carbon-metal nanocomposites each to be adhered by an amount of the liquid hydrocarbon material to form a mixture, applying a magnetic force to the mixture to attract the plurality of magnetic carbon-metal nanocomposites each adhered by an amount of the liquid hydrocarbon material, and removing said plurality of magnetic carbon-metal nanocomposites each adhered by an amount of the liquid hydrocarbon material from said body of water while maintaining the applied magnetic force, wherein the plurality of magnetic carbon-metal nanocomposites is formed by subjecting one or more metal lignosulfonates or metal salts to microwave radiation, in presence of lignin/derivatives either in presence of alkali or a microwave absorbing material.

Viswanathan, Tito

2014-02-11T23:59:59.000Z

53

Magnet Exploration: Pre and Post Materials for Classroom Visit...  

NLE Websites -- All DOE Office Websites (Extended Search)

. . . . . . . . Contact us 3 5 7 8 9 11 12 13 14 3 What is the NHMFL? * The National High Magnetic Field Laboratory is a working science research laboratory utilizing...

54

UHV-compatible magnetic material for atom optics  

Science Journals Connector (OSTI)

Magnetic videotape is of great interest for trapping and guiding cold atomic vapors, but was hitherto considered unsuitable for manipulating Bose–Einstein condensates (BEC) because of the presumed evolution of...

S.A. Hopkins; E.A. Hinds; M.G. Boshier

2001-07-01T23:59:59.000Z

55

Heterogeneous Reaction of NO2 on Soot Surfaces and the Effect of Soot Aging on its Reactivity Leading to HONO Formation  

E-Print Network (OSTI)

. The soot was collected from a diffusion flame using propane and kerosene fuels using two different methods. A low pressure fast-flow reactor coupled to a Chemical Ionization Mass Spectrometer (CIMS) was used to monitor NO2 and HONO signals evolution using...

Cruz Quinones, Miguel

2011-02-22T23:59:59.000Z

56

Condensed Matter and Magnetic Science, MPA-CMMS: Materials Physics and  

NLE Websites -- All DOE Office Websites (Extended Search)

feature banner feature banner banner Condensed Matter and Magnet Science The Condensed Matter and Magnet Science Group (MPA-CMMS) is comprised of research scientists, technicians, postdocs, and students specializing in experimental physics research, with a strong emphasis on fundamental condensed matter physics with complimentary thrusts in correlated electron materials, high magnetic-field science and technology, thermal physics, and actinide chemistry. MPA-CMMS hosts the Pulsed Field Facility of the National High Magnetic Field Laboratory (NHMFL-PFF) located at TA-35 while new material synthesis, low temperature expertise, and various low-energy spectroscopies are located at TA-3. Our actinide chemistry activities occur at RC-1 (TA-48). The NHMFL-PFF is a national user facility for high magnetic field science sponsored primarily by the National Science Foundation's Division of Materials Research, with branches at Florida State University, the University of Florida, and Los Alamos National Laboratory. (Check out NHMFL Web site for more details.)

57

Effect of Composition and Heat Treatment on MnBi Magnetic Materials...  

NLE Websites -- All DOE Office Websites (Extended Search)

Abstract: The metallic compound MnBi is a promising rare-earth-free permanent magnet material. Compare to other rare-earth-free candidates, MnBi stands out for its high...

58

3.15 Electrical, Optical & Magnetic Materials and Devices, Fall 2003  

E-Print Network (OSTI)

Explores the relationships which exist between the performance of electrical, optical, and magnetic devices and the microstructural characteristics of the materials from which they are constructed. Features a device-motivated ...

Ross, Caroline A.

59

Nitrogen Oxides in the Nocturnal Boundary Layer: Chemistry of Nitrous Acid (HONO) and the Nitrate Radical (N03)  

SciTech Connect

Summary Chemical processes occurring at night in the lowest part of the urban atmosphere, the so called nocturnal boundary layer (NBL), can influence the composition of the atmosphere during the night as well as the following day. They may impact the budgets of some of the most important pollutants, such as ozone and nitrogen oxides, as well as influence size and composition of particular matter. Few studies have thus far concentrated on the nocturnal chemistry of the urban NBL, most likely due to the strong influence of vertical transport and mixing, which requires the measurement of trace gas profiles instead of simple point observations. Motivated by our lack of observations and understanding of nocturnal chemistry, the focus of this project was the study of the vertical distribution of trace gases and the altitude dependence of nocturnal chemistry under polluted conditions through field observations and modeling studies. The analysis of three field experiments (TEXAQS, Houston, 2000; Phoenix Sunrise Ozone Experiment, 2001; NAPOX, Boston, 2002), two of which were performed in this project, showed that ozone concentrations typically increase with height in the lowest 150m, while NO2 typically decreases. NO3, the dominant nocturnal radical species, showed much higher concentrations in the upper part of the NBL, and was often not present at the ground. With the help of a one-dimensional chemical transport model, developed in this project, we found that the interaction of ground emissions of NOx and hydrocarbons, together with their vertical transport, is responsible for the vertical profiles. The dominant chemical reactions influencing ozone, NO2 and NO3 are the reaction of ozone and NO3 with freshly emitted NO. Sensitivity studies with our model showed that the magnitude of the trace gas gradients depend both on the emission rates and the vertical stability of the NBL. Observations and model analysis clearly show that nocturnal chemistry in urban areas is altitude dependent. Measurements at one altitude, for example at the ground, where most air quality monitoring stations are located, are not representative for the rest of the NBL. Our model also revealed that radical chemistry is, in general, altitude dependent at night. We distinguish three regions: an unreactive, NO rich, ground layer; an upper, O3 and NO3 dominated layer, and a reactive mixing layer, where RO2 radicals are mixed from aloft with NO from the ground. In this reactive layer an active radical chemistry and elevated OH radical levels can be found. The downward transport of N2O5 and HO2NO2, followed by their thermal decay, was also identified as a radical source in this layer. Our observations also gave insight into the formation of HONO in the NBL. Based on our field experiments we were able to show that the NO2 to HONO conversion was relative humidity dependent. While this fact was well known, we found that it is most likely the uptake of HONO onto surfaces which is R.H. dependent, rather than the NO2 to HONO conversion. This finding led to the proposal of a new NO2 to HONO conversion mechanism, which is based on solid physical chemical principles. Noteworthy is also the observation of enhanced NO2 to HONO conversion during a dust storm event in Phoenix. The final activity in our project investigated the influence of the urban canopy, i.e. building walls and surfaces, on nocturnal chemistry. For the first time the surface area of a city was determined based on a Geographical Information System database of the city of Santa Monica. The surface to volume areas found in this study showed that, in the 2 lower part of the NBL, buildings provide a much larger surface area than the aerosol. In addition, buildings take up a considerable amount of the volume near the ground. The expansion of our model and sensitivity studies based on the Santa Monica data revealed that the surface area of buildings considerably influences HONO levels in urban areas. The volume reduction leads to a decrease of O3 and an increase of NO2 near the ground due to the stronger impact o

Jochen Stutz

2005-05-24T23:59:59.000Z

60

ELSEWER Journal of Magnetism and Magnetic Materials 169 (1997) 261-270 Superparamagnetic behavior of Fe,GaAs precipitates in GaAs  

E-Print Network (OSTI)

ELSEWER Journal of Magnetism and Magnetic Materials 169 (1997) 261-270 Superparamagnetic behavior; revised 6 December 1996 Abstract We present magnetization measurements on Fe3GaAs clusters distributed-dependent magnetization well above the blocking temperature indicate a particle size distribution in agreement

Woodall, Jerry M.

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


61

Exploring Ultrahigh Magnetic Field Processing of Materials for Developing Customized Microstructures and Enhanced Performance  

SciTech Connect

Thermodynamic calculations based on Gibbs free energy in the magnetization-magnetic intensity-temperature (M-H-T) magnetic equation of state space demonstrate that significantly different phase equilibria may result for those material systems where the product and parent phases exhibit different magnetization responses. These calculations show that the Gibbs free energy is changed by a factor equal to -MdH, where M and H are the magnetization and applied field strength, respectively. Magnetic field processing is directly applicable to a multitude of alloys and compounds for dramatically influencing phase stability and phase transformations. This ability to selectively control microstructural stability and alter transformation kinetics through appropriate selection of the magnetic field strength promises to provide a very robust mechanism for developing and tailoring enhanced microstructures (and even nanostructures through accelerated kinetics) with superior properties for a broad spectrum of material applications. For this Industrial Materials for the Future (IMF) Advanced Materials for the Future project, ferrous alloys were studied initially since this alloy family exhibits ferromagnetism over part of its temperature range of stability and therefore would demonstrate the maximum impact of this novel processing mechanism. Additionally, with these ferrous alloys, the high-temperature parent phase, austenite, exhibits a significantly different magnetization response from the potential product phases, ferrite plus carbide or martensite; and therefore, the solid-state transformation behavior of these alloys will be dramatically influenced by the presence of ultrahigh magnetic fields. Finally, a thermodynamic calculation capability (within ThermoCalc for example) was developed during this project to enable parametric studies to be performed to predict the magnitude of the influence of magnetic processing variables on the phase stability (phase diagrams) in ferromagnetic materials of relevance to the Industries of the Future (IOF).

Ludtka, GERALD M.

2005-03-31T23:59:59.000Z

62

398 IEEE TRANSACTIONS ON MAGNETICS, VOL. 42, NO. 3, MARCH 2006 Introducing Dynamic Behavior of Magnetic Materials  

E-Print Network (OSTI)

of Magnetic Materials Into a Model of a Switched Reluctance Motor Drive F. Sixdenier, L. Morel, and J. P, we present the model of an ultrafast switched reluctance motor, in which the control of the power switched reluctance motor (SRM) drive [9], [10] designed by the Labora- toire de genie industriel et

Boyer, Edmond

63

Mesoporous Multifunctional Upconversion Luminescent and Magnetic “Nanorattle” Materials for Targeted Chemotherapy  

Science Journals Connector (OSTI)

The material emits visible luminescence upon NIR excitation and can be directed by an external magnetic field to a specific target, making it an attractive system for a variety of biological applications. ... (5-10) Along these lines, luminescent and magnetic nanoparticles have been used as biolabeling and contrast agents, and for magnetic resonance imaging (MRI), leading recently to major advances in biological and biomedical imaging. ... Field-dependent magnetization curves of the MUC-F-NR were recorded using a superconducting quantum interference device (SQUID) magnetometer with fields up to 5 T (Figure 2b). ...

Fan Zhang; Gary B. Braun; Alessia Pallaoro; Yichi Zhang; Yifeng Shi; Daxiang Cui; Martin Moskovits; Dongyuan Zhao; Galen D. Stucky

2011-12-01T23:59:59.000Z

64

An in-situ accelerator-based diagnostic for plasma-material interactions science in magnetic fusion devices  

E-Print Network (OSTI)

Plasma-material interactions (PMI) in magnetic fusion devices such as fuel retention, material erosion and redeposition, and material mixing present significant scientific and engineering challenges, particularly for the ...

Hartwig, Zachary Seth

2014-01-01T23:59:59.000Z

65

Dynamic high pressure process for fabricating superconducting and permanent magnetic materials  

DOE Patents (OSTI)

Shock wave formation of thin layers of materials with improved superconducting and permanent magnetic properties and improved microstructures is disclosed. The material fabrication system includes a sandwiched structure including a powder material placed between two solid members to enable explosive shock consolidation. The two solid members are precooled to about 80--100 K to reduce the residual temperatures attained as a result of the shock wave treatment, and thereby increase the quench rate of the consolidated powder. 9 figs.

Nellis, W.J.; Geballe, T.H.; Maple, M.B.

1990-03-13T23:59:59.000Z

66

Fundamental study of magnetic field-assisted micro-EDM for non-magnetic materials.  

E-Print Network (OSTI)

??Micro-Electrical Discharge Machining (??-EDM) is a unique machining method capable of removing material in the sub-grain size range (0.1-10 ??m) from materials irrespective of their… (more)

Heinz, Kenneth G., Jr.

2010-01-01T23:59:59.000Z

67

Nuclear Magnetic Resonance Studies of Some Materials Containing Divalent Europium  

Science Journals Connector (OSTI)

This paper reports the results of a low-temperature NMR experiment on Eu153 in EuO. The data, which are assumed to be linear with magnetization, are compared with calculated values using spin-wave theory. Values of J1kb=0.750±0.0025°K and J2kb=-0.0975±0.004°K are found to give a good description of EuO. This paper also reports the results of NMR studies of the ligands F19 and Cs137 in EuF2 and CsEuF3. These experiments indicate that there is a reversal in sign of the unpaired spin density of the europium ion. The same results are obtained with europium-bearing glasses. This effect is discussed in terms of the Freeman-Watson model of Gd3+ and in terms of a virtual 5d state in Eu2+.

E. L. Boyd

1966-05-06T23:59:59.000Z

68

THERMAL IMAGING OF ACTIVE MAGNETIC REGERNERATOR MCE MATERIALS DURING OPERATION  

SciTech Connect

An active magnetic regenerator (AMR) prototype was constructed that incorporates a Gd sheet into the regenerator wall to enable visualization of the system s thermal transients. In this experiment, the thermal conditions inside the AMR are observed under a variety of operating conditions. An infrared (IR) camera is employed to visualize the thermal transients within the AMR. The IR camera is used to visually and quantitatively evaluate the temperature difference and thus giving means to calculate the performance of the system under the various operating conditions. Thermal imaging results are presented for two differing experimental test runs. Real time imaging of the thermal state of the AMR has been conducted while operating the system over a range of conditions. A 1 Tesla twin-coil electromagnet (situated on a C frame base) is used for this experiment such that all components are stationary during testing. A modular, linear reciprocating system has been realized in which the effects of regenerator porosity and utilization factor can be investigated. To evaluate the performance variation in porosity and utilization factor the AMR housing was constructed such that the plate spacing of the Gd sheets may be varied. Each Gd sheet has dimensions of 38 mm wide and 66 mm long with a thickness of 1 mm and the regenerator can hold a maximum of 29 plates with a spacing of 0.25 mm. Quantitative and thermal imaging results are presented for several regenerator configurations.

Shassere, Benjamin [ORNL] [ORNL; West, David L [ORNL] [ORNL; Abdelaziz, Omar [ORNL] [ORNL; Evans III, Boyd Mccutchen [ORNL] [ORNL

2012-01-01T23:59:59.000Z

69

Magnetic resonance studies of cement based materials in inhomogeneous magnetic fields  

SciTech Connect

Single-sided magnets give hope that Nuclear Magnetic Resonance (NMR) might in future be used for in situ characterisation of hydration and water transport in the surface layers of concrete slabs. Towards that end, a portable NMR-MOUSE (MObile Universal Surface Explorer) has been used to follow the hydration of gypsum based plaster, a Portland cement paste and concrete mortar. The results compare favourably to those obtained using a standard laboratory bench-top spectrometer. Further, stray field imaging (STRAFI) based methods have been used with embedded NMR detector coils to study water transport across a mortar/topping interface. The measured signal amplitudes are found to correlate with varying sample conditions.

Boguszynska, Joanna [Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, Poznan (Poland); Brown, Marc C.A. [School of Physical Sciences, University of Kent, Canterbury, Kent, CT2 7NR (United Kingdom); McDonald, Peter J. [School of Electronics and Physical Sciences, University of Surrey, Surrey, GU2 7XH (United Kingdom)]. E-mail: p.mcdonald@surrey.ac.uk; Mitchell, Jonathan [School of Electronics and Physical Sciences, University of Surrey, Surrey, GU2 7XH (United Kingdom); Mulheron, Mike [School of Engineering, University of Surrey, Surrey, GU2 7XH (United Kingdom); Tritt-Goc, Jadwiga [Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, Poznan (Poland); Verganelakis, Dimitris A. [Department of Chemical Engineering, University of Cambridge, Cambridge, CB2 3RA (United Kingdom)

2005-10-01T23:59:59.000Z

70

Transition-metal silicides as materials for magnet-semiconductor heterostructures*  

E-Print Network (OSTI)

Transition-metal silicides as materials for magnet-semiconductor heterostructures* Peter Kratzer as of binary late transition metal monosilicides, in contact with the Si surface. For the Heusler alloy Co2MnSi, we could show that the 001 surface retains the half-metallic character of the bulk if a fully Mn

71

Nuclear magnetic resonance of laser-polarized noble gases in molecules, materials and organisms  

SciTech Connect

Conventional nuclear magnetic resonance (NMR) spectroscopy and magnetic resonance imaging (MRI) are fundamentally challenged by the insensitivity that stems from the ordinarily low spin polarization achievable in even the strongest NMR magnets. However, by transferring angular momentum from laser light to electronic and nuclear spins, optical pumping methods can increase the nuclear spin polarization of noble gases by several orders of magnitude, thereby greatly enhancing their NMR sensitivity. This dissertation is primarily concerned with the principles and practice of optically pumped nuclear magnetic resonance (OPNMR). The enormous sensitivity enhancement afforded by optical pumping noble gases can be exploited to permit a variety of novel NMR experiments across many disciplines. Many such experiments are reviewed, including the void-space imaging of organisms and materials, NMR and MRI of living tissues, probing structure and dynamics of molecules in solution and on surfaces, and zero-field NMR and MRI.

Goodson, Boyd M.

1999-12-01T23:59:59.000Z

72

Ultra-low field nuclear magnetic resonance and magnetic resonance imaging to discriminate and identify materials  

DOE Patents (OSTI)

Method comprising obtaining an NMR measurement from a sample wherein an ultra-low field NMR system probes the sample and produces the NMR measurement and wherein a sampling temperature, prepolarizing field, and measurement field are known; detecting the NMR measurement by means of inductive coils; analyzing the NMR measurement to obtain at least one measurement feature wherein the measurement feature comprises T1, T2, T1.rho., or the frequency dependence thereof; and, searching for the at least one measurement feature within a database comprising NMR reference data for at least one material to determine if the sample comprises a material of interest.

Matlashov, Andrei Nikolaevich; Urbaitis, Algis V.; Savukov, Igor Mykhaylovich; Espy, Michelle A.; Volegov, Petr Lvovich; Kraus, Jr., Robert Henry

2013-03-05T23:59:59.000Z

73

End station for nanoscale magnetic materials study: Combination of scanning tunneling microscopy and soft X-ray magnetic circular dichroism spectroscopy  

SciTech Connect

We have constructed an end station for nanoscale magnetic materials study at the soft X-ray beamline HiSOR BL-14 at Hiroshima Synchrotron Radiation Center. An ultrahigh-vacuum scanning tunneling microscope (STM) was installed for an in situ characterization of nanoscale magnetic materials in combination with soft X-ray magnetic circular dichroism (XMCD) spectroscopy experiment. The STM was connected to the XMCD experimental station via damper bellows to isolate it from environmental vibrations, thus achieving efficient spatial resolution for observing Si(111) surface at atomic resolution. We performed an in situ experiment with STM and XMCD spectroscopy on Co nanoclusters on an Au(111) surface and explored its practical application to investigate magnetic properties for well-characterized nanoscale magnetic materials.

Ueno, Tetsuro; Sawada, Masahiro; Namatame, Hirofumi [Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046 (Japan); Kishimizu, Yusuke; Kimura, Akio [Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526 (Japan); Taniguchi, Masaki [Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046 (Japan); Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526 (Japan)

2012-12-15T23:59:59.000Z

74

Estimation of quantum correlations in magnetic materials by neutron scattering data  

Science Journals Connector (OSTI)

Abstract We demonstrate that inelastic neutron scattering technique can be used to indirectly detect and measure the macroscopic quantum correlations quantified by both entanglement and discord in a quantum magnetic material, VODPO 4 ? 1 2 D 2 O . The amount of quantum correlations is obtained by analyzing the neutron scattering data of magnetic excitations in isolated V4+ spin dimers. Our quantitative analysis shows that the critical temperature of this material can reach as high as T c = 82.5 K , where quantum entanglement drops to zero. Significantly, quantum discord can even survive at T c = 300 K and may be used in room temperature quantum devices. Taking into account the spin–orbit (SO) coupling, we also predict theoretically that entanglement can be significantly enhanced and the critical temperature T c increases with the strength of spin–orbit coupling.

Ben-Qiong Liu; Lian-Ao Wu; Guo-Mo Zeng; Jian-Ming Song; Wei Luo; Yang Lei; Guang-Ai Sun; Bo Chen; Shu-Ming Peng

2014-01-01T23:59:59.000Z

75

System and method for non-destructive evaluation of surface characteristics of a magnetic material  

DOE Patents (OSTI)

A system and a related method for non-destructive evaluation of the surface characteristics of a magnetic material. The sample is excited by an alternating magnetic field. The field frequency, amplitude and offset are controlled according to a predetermined protocol. The Barkhausen response of the sample is detected for the various fields and offsets and is analyzed. The system produces information relating to the frequency content, the amplitude content, the average or RMS energy content, as well as count rate information, for each of the Barkhausen responses at each of the excitation levels applied during the protocol. That information provides a contiguous body of data, heretofore unavailable, which can be analyzed to deduce information about the surface characteristics of the material at various depths below the surface.

Jiles, David C. (Ames, IA); Sipahi, Levent B. (Ames, IA)

1994-05-17T23:59:59.000Z

76

Cryogenic Properties of Inorganic Insulation Materials for ITER Magnets: A Review  

SciTech Connect

Results of a literature search on the cryogenic properties of candidate inorganic insulators for the ITER TF magnets are reported. The materials investigated include: Al{sub 2}O{sub 3}, AlN, MgO, porcelain, SiO{sub 2}, MgAl{sub 2}O{sub 4}, ZrO{sub 2}, and mica. A graphical presentation is given of mechanical, elastic, electrical, and thermal properties between 4 and 300 K. A companion report reviews the low temperature irradiation resistance of these materials.

Simon, N.J.

1994-12-01T23:59:59.000Z

77

Method of making active magnetic refrigerant materials based on Gd-Si-Ge alloys  

DOE Patents (OSTI)

An alloy made of heat treated material represented by Gd.sub.5(Si.sub.xGe.sub.1-x).sub.4 where 0.47.ltoreq.x.ltoreq.0.56 that exhibits a magnetic entropy change (-.DELTA.S.sub.m) of at least 16 J/kg K, a magnetostriction of at least 2000 parts per million, and a magnetoresistance of at least 5 percent at a temperature of about 300K and below, and method of heat treating the material between 800 to 1600 degrees C. for a time to this end.

Pecharsky, Alexandra O. (Ames, IA); Gschneidner, Jr., Karl A. (Ames, IA); Pecharsky, Vitalij K. (Ames, IA)

2006-10-03T23:59:59.000Z

78

W.E. Henry Symposium compendium: The importance of magnetism in physics and material science  

SciTech Connect

This compendium contains papers presented at the W. E. Henry Symposium, The Importance of Magnetism in Physics and Material Science. The one-day symposium was conducted to recognize the achievements of Dr. Warren Elliot Henry as educator, scientist, and inventor in a career spanning almost 70 years. Dr. Henry, who is 88 years old, attended the symposium. Nobel Laureate, Dr. Glenn Seaborg, a friend and colleague for over 40 years, attended the event and shared his personal reminiscences. Dr. Seaborg is Associate Director-At-Large at the Lawrence Berkeley National Laboratory. The Compendium begins with three papers which demonstrate the ongoing importance of magnetism in physics and material science. Other contributions cover the highlights of Dr. Henry`s career as a researcher, educator, and inventor. Colleagues and former students share insights on the impact of Dr. Henry`s research in the field of magnetism, low temperature physics, and solid state physics; his influence on students as an educator; and his character, intellect and ingenuity, and passion for learning and teaching. They share a glimpse of the environment and times that molded him as a man, and the circumstances under which he made his great achievements despite the many challenges he faced.

Carwell, H.

1997-09-19T23:59:59.000Z

79

Effect of Composition and Heat Treatment on MnBi Magnetic Materials  

SciTech Connect

The metallic compound MnBi is a promising rare-earth-free permanent magnet material. Compare to other rare-earth-free candidates, MnBi stands out for its high intrinsic coercivity (Hci) and its large positive temperature coefficient. Several groups have demonstrated that the Hci of MnBi compound in thin film or in powder form can exceed 12 kOe and 26 kOe at 300 K and 523 K, respectively. Such steep increase in Hci with increasing temperature is unique to MnBi. Consequently, MnBi is a highly sought-after hard phase for exchange coupling nanocomposite magnets. The reaction between Mn and Bi is peritectic, so Mn tends to precipitate out of the MnBi liquid during the solidification process. As result, the composition of the Mn-Bi alloy with the largest amount of the desired LTP (low temperature phase) MnBi and highest saturation magnetization will be over-stoichiometric and rich in Mn. The amount of additional Mn required to compensate the Mn precipitation depends on solidification rate: the faster the quench speed, the less Mn precipitates. Here we report a systematic study of the effect of composition and heat treatments on the phase contents and magnetic properties of Mn-Bi alloys. In this study, Mn-Bi alloys with 14 compositions were prepared using conventional metallurgical methods such as arc melting and vacuum heat treatment, and the obtained alloys were analyzed for compositions, crystal structures, phase content, and magnetic properties. The results show that the composition with 55 at.% Mn exhibits the highest LTP MnBi content and the highest magnetization. The sample with this composition shows >90 wt.% LTP MnBi content. Its measured saturation magnetization is 68 emu/g with 2.3 T applied field at 300 K; its coercivity is 13 kOe and its energy product is 12 MGOe at 300 K. A bulk magnet fabricated using this powder exhibits an energy product of 8.2 MGOe.

Cui, Jun; Choi, Jung-Pyung; Polikarpov, Evgueni; Bowden, Mark E.; Xie, Wei; Li, Guosheng; Nie, Zimin; Zarkevich, Nikolai; Kramer, Matthew J.; Johnson, Duane D.

2014-08-17T23:59:59.000Z

80

Impact of fluorine based reactive chemistry on structure and properties of high moment magnetic material  

SciTech Connect

The impact of the fluorine-based reactive ion etch (RIE) process on the structural, electrical, and magnetic properties of NiFe and CoNiFe-plated materials was investigated. Several techniques, including X-ray fluorescence, 4-point-probe, BH looper, transmission electron microscopy (TEM), and electron energy loss spectroscopy (EELS), were utilized to characterize both bulk film properties such as thickness, average composition, Rs, ?, Bs, Ms, and surface magnetic “dead” layers' properties such as thickness and element concentration. Experimental data showed that the majority of Rs and Bs changes of these bulk films were due to thickness reduction during exposure to the RIE process. ? and Ms change after taking thickness reduction into account were negligible. The composition of the bulk films, which were not sensitive to surface magnetic dead layers with nano-meter scale, showed minimum change as well. It was found by TEM and EELS analysis that although both before and after RIE there were magnetic dead layers on the top surface of these materials, the thickness and element concentration of the layers were quite different. Prior to RIE, dead layer was actually native oxidation layers (about 2?nm thick), while after RIE dead layer consisted of two sub-layers that were about 6?nm thick in total. Sub-layer on the top was native oxidation layer, while the bottom layer was RIE “damaged” layer with very high fluorine concentration. Two in-situ RIE approaches were also proposed and tested to remove such damaged sub-layers.

Yang, Xiaoyu, E-mail: xiaoyu.yang@wdc.com; Chen, Lifan; Han, Hongmei; Fu, Lianfeng; Sun, Ming; Liu, Feng; Zhang, Jinqiu [Western Digital Corporation, 44100 Osgood Road, Fremont, California 94539 (United States)

2014-05-07T23:59:59.000Z

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


81

Effect of composition and heat treatment on MnBi magnetic materials  

SciTech Connect

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 Mn–Bi 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).

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

2014-10-01T23:59:59.000Z

82

residual magnetism  

Science Journals Connector (OSTI)

The magnetization, i.e., the magnetic polarization, that remains in a magnetized material after all attempts to remove the magnetization have been made. Note: An example of residual magnetization is the magnetiza...

2001-01-01T23:59:59.000Z

83

Magnetic resonance imaging (MRI) of solid materials entails numerous problems from short longitudinal relaxation (T2) times to  

E-Print Network (OSTI)

. Solid-State STRAFI NMR Probe for Material Imaging of Quadrupolar Nuclei, J. Magn. Reson. httpMagnetic resonance imaging (MRI) of solid materials entails numerous problems from short for broadband tuning, sample translation along z-axis, and electrodes for in situ battery studies. An Alderman

Weston, Ken

84

Global phase diagram for magnetism and lattice distortion of iron-pnictide materials  

Science Journals Connector (OSTI)

We study the global phase diagram of magnetic orders and lattice structure in the Fe-pnictide materials at zero temperature within one unified theory tuned by both electron doping and pressure. On the low doping and high-pressure side of the phase diagram, there is one single transition, which is described by a z=2 mean-field theory with very weak run-away flows; on the high doping and low-pressure side, the transition is expected to split to two transitions, with one O(3) spin-density wave transition followed by a z=3 quantum Ising transition at larger doping. The fluctuation of the strain field of the lattice will not affect the spin-density wave transition but will likely drive the Ising nematic order transition a mean-field transition through a linear coupling, as observed experimentally in BaFe2?xCoxAs2.

Yang Qi and Cenke Xu

2009-09-04T23:59:59.000Z

85

Rare?Earth?Free Permanent Magnets for Electrical Vehicle Motors and Wind Turbine Generators: Hexagonal Symmetry Based Materials Systems Mn?Bi and M?type Hexaferrite  

SciTech Connect

The research we conducted focuses on the rare-earth (RE)-free permanent magnet by modeling, simulating, and synthesizing exchange coupled two-phase (hard/soft) RE-free core-shell nano-structured magnet. The RE-free magnets are made of magnetically hard core materials (high anisotropy materials including Mn-Bi-X and M-type hexaferrite) coated by soft shell materials (high magnetization materials including Fe-Co or Co). Therefore, our research helps understand the exchange coupling conditions of the core/shell magnets, interface exchange behavior between core and shell materials, formation mechanism of core/shell structures, stability conditions of core and shell materials, etc.

Hong, Yang-Ki [University of Alabama] [University of Alabama; Haskew, Timothy [University of Alabama] [University of Alabama; Myryasov, Oleg [University of Alabama] [University of Alabama; Jin, Sungho [University of California San Diego] [University of California San Diego; Berkowitz, Ami [University of California San Diego] [University of California San Diego

2014-06-05T23:59:59.000Z

86

Magnetic Processing – A Pervasive Energy Efficient Technology for Next Generation Materials for Aerospace and Specialty Steel Markets  

SciTech Connect

Thermomagnetic Magnetic Processing is an exceptionally fertile, pervasive and cross-cutting technology that is just now being recognized by several major industry leaders for its significant potential to increase energy efficiency and materials performance for a myriad of energy intensive industries in a variety of areas and applications. ORNL has pioneered the use and development of large magnetic fields in thermomagnetically processing (T-MP) materials for altering materials phase equilibria and transformation kinetics. ORNL has discovered that using magnetic fields, we can produce unique materials responses. T-MP can produce unique phase stabilities & microstructures with improved materials performance for structural and functional applications not achieved with traditional processing techniques. These results suggest that there are unprecedented opportunities to produce significantly enhanced materials properties via atomistic level (nano-) microstructural control and manipulation. ORNL (in addition to others) have shown that grain boundary chemistry and precipitation kinetics are also affected by large magnetic fields. This CRADA has taken advantage of ORNL’s unique, custom-designed thermo-magnetic, 9 Tesla superconducting magnet facility that enables rapid heating and cooling of metallic components within the magnet bore; as well as ORNL’s expertise in high magnetic field (HMF) research. Carpenter Technologies, Corp., is a a US-based industrial company, that provides enhanced performance alloys for the Aerospace and Specialty Steel products. In this CRADA, Carpenter Technologies, Corp., is focusing on applying ORNL’s Thermomagnetic Magnetic Processing (TMP) technology to improve their current and future proprietary materials’ product performance and open up new markets for their Aerospace and Specialty Steel products. Unprecedented mechanical property performance improvements have been demonstrated for a high strength bainitic alloy industrial/commercial alloy that is envisioned to provide the potential for new markets for this alloy. These thermomechanical processing results provide these alloys with a major breakthrough demonstrating that simultaneous improvements in yield strength and ductility are achieved: 12 %, 10%, 13%, and 22% increases in yield strength, elongation, reduction-in-area, and impact energy respectively. In addition, TMP appears to overcome detrimental chemical homogeneity impacts on uniform microstructure evolution.

Mackiewicz-Ludtka, G.; Ludtka, G.M.; Ray, P. (Carpenter Technologies, Inc.); Magee, J. (Carpenter Technologies, Inc.)

2010-09-10T23:59:59.000Z

87

Investigation of anisotropic photonic band gaps in three-dimensional magnetized plasma photonic crystals containing the uniaxial material  

SciTech Connect

In this paper, the dispersive properties of three-dimensional (3D) magnetized plasma photonic crystals (MPPCs) composed of anisotropic dielectric (the uniaxial material) spheres immersed in homogeneous magnetized plasma background with face-centered-cubic (fcc) lattices are theoretically investigated by the plane wave expansion method, as the Voigt effects of magnetized plasma are considered. The equations for calculating the anisotropic photonic band gaps (PBGs) in the first irreducible Brillouin zone are theoretically deduced. The anisotropic PBGs and two flatbands regions can be obtained. The effects of the ordinary-refractive index, extraordinary-refractive index, filling factor, plasma frequency, and external magnetic field on the dispersive properties of the 3D MPPCs are investigated in detail, respectively, and some corresponding physical explanations are also given. The numerical results show that the anisotropy can open partial band gaps in 3D MPPCs with fcc lattices and the complete PBGs can be found compared to the conventional 3D MPPCs doped by the isotropic material. The bandwidths of PBGs can be tuned by introducing the magnetized plasma into 3D PCs containing the uniaxial material. It is also shown that the anisotropic PBGs can be manipulated by the ordinary-refractive index, extraordinary-refractive index, filling factor, plasma frequency, and external magnetic field, respectively. The locations of flatbands regions cannot be manipulated by any parameters except for the plasma frequency and external magnetic field. Introducing the uniaxial material can obtain the complete PBGs as the 3D MPPCs with high symmetry and also provides a way to design the tunable devices.

Zhang, Hai-Feng [College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016 (China) [College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016 (China); Nanjing Artillery Academy, Nanjing 211132 (China)] [China; Liu, Shao-Bin; Kong, Xiang-Kun [College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016 (China)] [College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016 (China)

2013-09-15T23:59:59.000Z

88

Far-Infrared Studies of Spin-Peierls Materials in a Magnetic Field  

Science Journals Connector (OSTI)

Both a 20 T superconducting magnet and a 33 T resistive magnet were employed for the magnetic field work. ... Bottom panel:? dashed line, absolute transmission spectra of MEM(TCNQ)2 at 300 K and zero field; solid lines, 5 K transmission ratios of MEM(TCNQ)2 taken as a function of applied magnetic field. ... (47)?Ng, H. K.; Wang, Y. J. Proceedings of the Physical Phenomena at High Magnetic Fields II Conference, Tallahassee, FL, Fisk, Z., Ed.; 1995. ...

G. Li; J. S. Lee; V. C. Long; J. L. Musfeldt; Y. J. Wang; M. Almeida; A. Revcolevschi; G. Dhalenne

1998-03-04T23:59:59.000Z

89

Magnetism  

Science Journals Connector (OSTI)

Historically, magnetism is related to rock magnetism, due to a few minerals exhibiting spontaneous magnetization. Attractive properties of magnetite were already known in Antiquity and were used for navigation...

Guillaume Morin

1998-01-01T23:59:59.000Z

90

magnetism  

Science Journals Connector (OSTI)

magnetism [A class of physical phenomena associated with moving electricity, including the mutual mechanical forces among magnets and electric currents] ? Magnetismus m

2014-08-01T23:59:59.000Z

91

Maximizing Hysteretic Losses in Magnetic Ferrite Nanoparticles via Model-Driven Synthesis and Materials Optimization  

E-Print Network (OSTI)

This article develops a set of design guidelines for maximizing heat dissipation characteristics of magnetic ferrite MFe[subscript 2]O[subscript 4] (M = Mn, Fe, Co) nanoparticles in alternating magnetic fields. Using ...

Chen, Ritchie

92

Dynamic high pressure process for fabricating superconducting and permanent magnetic materials  

DOE Patents (OSTI)

Shock wave formation of superconductive ceramic oxide electric and magnetic circuit elements with improved microstructures and mechanical properties. 10 figs.

Nellis, W.J.; Maple, M.B.; Geballe, T.H.

1987-10-23T23:59:59.000Z

93

Magnetism Digest  

Science Journals Connector (OSTI)

... and Institute of Electrical and Electronic Engineers, on the occasion of their annual conferences on magnetism and magnetic materials in the United States, have sponsored the production of a Magnetic ... references, drawn from a large number of sources, to work in the field of magnetism and magnetic materials published in the preceding year. They therefore provide a very convenient ...

J. H. PHILLIPS

1966-06-25T23:59:59.000Z

94

Removal of radioactive materials and heavy metals from water using magnetic resin  

DOE Patents (OSTI)

Magnetic polymer resins capable of efficient removal of actinides and heavy metals from contaminated water are disclosed together with methods for making, using, and regenerating them. The resins comprise polyamine-epichlorohydrin resin beads with ferrites attached to the surfaces of the beads. Markedly improved water decontamination is demonstrated using these magnetic polymer resins of the invention in the presence of a magnetic field, as compared with water decontamination methods employing ordinary ion exchange resins or ferrites taken separately. 9 figs.

Kochen, R.L.; Navratil, J.D.

1997-01-21T23:59:59.000Z

95

Magnetism  

Science Journals Connector (OSTI)

... dipoles in applied fields". It deals with the classical (Langevin) theory of para-magnetism, anisotropy fields and magnetic measurements. In the next chapter "Atomic structure" the author ... special relevance to ferrites and the inclusion of a quite lengthy discussion of Pauli para-magnetism and of Stoner's treatment of itinerant electron ferromagnetism, though it does much to ...

E. W. LEE

1972-03-31T23:59:59.000Z

96

Active magnetic refrigerants based on Gd-Si-Ge material and refrigeration apparatus and process  

DOE Patents (OSTI)

Active magnetic regenerator and method using Gd.sub.5 (Si.sub.x Ge.sub.1-x).sub.4, where x is equal to or less than 0.5, as a magnetic refrigerant that exhibits a reversible ferromagnetic/antiferromagnetic or ferromagnetic-II/ferromagnetic-I first order phase transition and extraordinary magneto-thermal properties, such as a giant magnetocaloric effect, that renders the refrigerant more efficient and useful than existing magnetic refrigerants for commercialization of magnetic regenerators. The reversible first order phase transition is tunable from approximately 30 K to approximately 290 K (near room temperature) and above by compositional adjustments. The active magnetic regenerator and method can function for refrigerating, air conditioning, and liquefying low temperature cryogens with significantly improved efficiency and operating temperature range from approximately 10 K to 300 K and above. Also an active magnetic regenerator and method using Gd.sub.5 (Si.sub.x Ge.sub.1-x).sub.4, where x is equal to or greater than 0.5, as a magnetic heater/refrigerant that exhibits a reversible ferromagnetic/paramagnetic second order phase transition with large magneto-thermal properties, such as a large magnetocaloric effect that permits the commercialization of a magnetic heat pump and/or refrigerant. This second order phase transition is tunable from approximately 280 K (near room temperature) to approximately 350 K by composition adjustments. The active magnetic regenerator and method can function for low level heating for climate control for buildings, homes and automobile, and chemical processing.

Gschneidner, Jr., Karl A. (Ames, IA); Pecharsky, Vitalij K. (Ames, IA)

1998-04-28T23:59:59.000Z

97

Active magnetic refrigerants based on Gd-Si-Ge material and refrigeration apparatus and process  

DOE Patents (OSTI)

Active magnetic regenerator and method using Gd{sub 5} (Si{sub x}Ge{sub 1{minus}x}){sub 4}, where x is equal to or less than 0.5, as a magnetic refrigerant that exhibits a reversible ferromagnetic/antiferromagnetic or ferromagnetic-II/ferromagnetic-I first order phase transition and extraordinary magneto-thermal properties, such as a giant magnetocaloric effect, that renders the refrigerant more efficient and useful than existing magnetic refrigerants for commercialization of magnetic regenerators. The reversible first order phase transition is tunable from approximately 30 K to approximately 290 K (near room temperature) and above by compositional adjustments. The active magnetic regenerator and method can function for refrigerating, air conditioning, and liquefying low temperature cryogens with significantly improved efficiency and operating temperature range from approximately 10 K to 300 K and above. Also an active magnetic regenerator and method using Gd{sub 5} (Si{sub x} Ge{sub 1{minus}x}){sub 4}, where x is equal to or greater than 0.5, as a magnetic heater/refrigerant that exhibits a reversible ferromagnetic/paramagnetic second order phase transition with large magneto-thermal properties, such as a large magnetocaloric effect that permits the commercialization of a magnetic heat pump and/or refrigerant. This second order phase transition is tunable from approximately 280 K (near room temperature) to approximately 350 K by composition adjustments. The active magnetic regenerator and method can function for low level heating for climate control for buildings, homes and automobile, and chemical processing. 27 figs.

Gschneidner, K.A. Jr.; Pecharsky, V.K.

1998-04-28T23:59:59.000Z

98

Plasma-materials interactions and impurity control in magnetically confined thermonuclear fusion machines  

Science Journals Connector (OSTI)

Progress achieved in plasma heating and magnetic confinement during the past decade has brought to the fore a number of problems which have to be solved if controlled thermonuclear fusion is to become an economic...

Dieter M. Gruen; Stanislav Vep?ek; Randy B. Wright

1980-01-01T23:59:59.000Z

99

E-Print Network 3.0 - advanced magnetic materials Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

B. ParkerJ. Cozzolino S. Peggs... W. Louie E. WillenJ. Muratore 12;Construction and Test of the Magnetic Mirror Model of the HTS RIA Source: Gupta, Ramesh - Superconducting...

100

Development of accelerator based spatially resolved ion beam analysis techniques for the study of plasma materials interactions in magnetic fusion devices  

E-Print Network (OSTI)

Plasma-material interactions (PMI) in magnetic fusion devices pose significant scientific and engineering challenges for the development of steady-state fusion power reactors. Understanding PMI is crucial for the develpment ...

Barnard, Harold Salvadore

2014-01-01T23:59:59.000Z

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


101

Magnetism  

Science Journals Connector (OSTI)

... THIS is a good book, and we are glad to see the subject of magnetism fully treated in a popularly written text-book. It is a second edition of ... of importance, accuracy, and exhaustiveness, places the present treatise, as far as terrestrial magnetism is concerned, much before any similar book with which we are acquainted. The correction ...

JAMES STUART

1872-03-07T23:59:59.000Z

102

Temperature and magnetic field dependent optical spectral weight in the cation-deficient colossal-magnetoresistance material La0.936Mn0.982O3  

E-Print Network (OSTI)

with the general arguments, a broad peak has been observed in 1 various Mn-based CMR materials by several groupsTemperature and magnetic field dependent optical spectral weight in the cation-deficient colossal on single-crystal samples as a function of temperature and at zero and 0.5 T magnetic fields

Homes, Christopher C.

103

Interplay of superconductivity, magnetism, and density waves in rare-earth tritellurides and iron-based superconducting materials  

E-Print Network (OSTI)

3. Magnetism in Metals . . . . . . . . . . . . . . . . .IV Superconductivity and Magnetism in Iron-PnictideIII Superconductivity, Magnetism and Charge-Density Waves in

Zocco, Diego Andrés

2011-01-01T23:59:59.000Z

104

Using Magnetic Levitation for Three Dimensional Self-Assembly SUPPORTI G O LI E MATERIAL  

E-Print Network (OSTI)

063-N50; rectangular prisms: grade N42, 4 in Ã? 2 in Ã? 1 in, Model# NB079) were purchased from Applied from Utrecht (Cambridge, MA; www.utrechtart.com). Polyvinyl chloride tape (PVC) and aluminum tape were sink to the bottom of the container in the absence of an applied magnetic field. B) Positioning

Aizenberg, Joanna

105

Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Materials and methods are available as supplementary materials on Science Online. 16. W. Benz, A. G. W. Cameron, H. J. Melosh, Icarus 81, 113 (1989). 17. S. L. Thompson, H. S. Lauson, Technical Rep. SC-RR-710714, Sandia Nat. Labs (1972). 18. H. J. Melosh, Meteorit. Planet. Sci. 42, 2079 (2007). 19. S. Ida, R. M. Canup, G. R. Stewart, Nature 389, 353 (1997). 20. E. Kokubo, J. Makino, S. Ida, Icarus 148, 419 (2000). 21. M. M. M. Meier, A. Reufer, W. Benz, R. Wieler, Annual Meeting of the Meteoritical Society LXXIV, abstr. 5039 (2011). 22. C. B. Agnor, R. M. Canup, H. F. Levison, Icarus 142, 219 (1999). 23. D. P. O'Brien, A. Morbidelli, H. F. Levison, Icarus 184, 39 (2006). 24. R. M. Canup, Science 307, 546 (2005). 25. J. J. Salmon, R. M. Canup, Lunar Planet. Sci. XLIII, 2540 (2012). Acknowledgments: SPH simulation data are contained in tables S2 to S5 of the supplementary materials. Financial support

106

Learning About Magnets!  

NLE Websites -- All DOE Office Websites (Extended Search)

the the National High Magnetic Field Laboratory Learning About Name A magnet is a material or object that creates a magnetic fi eld. This fi eld is invisible, but it creates a force that can "attract" or "repel" other magnets and magnetic materials, like iron or nickel. What is a Magnet? This bar magnet is a permanent magnet. Permanent magnets can be found in the Earth as rocks and metals. Magnets have

107

Incorporation of 4d and 5d Transition Metal Cyanometallates into Magnetic Clusters and Materials.  

E-Print Network (OSTI)

AND PENTADECANUCLEAR CLUSTERS BASED ON MV(CN)8 (M = Mo, W) AND NiII .............. 35 Introduction .................................................................................... 35 Experimental Section... scheme of Prussian Blue analogs, M' = V,Cr, Fe, Co, M = V, Cr, Mn, Fe, Ni , L = labile ligand or solvent molecule. 6 cancel, and the remaining unpaired spins align with the field as a ferromagnet does (Scheme 2a). Although these magnetic...

Hilfiger, Matthew Gary

2011-08-08T23:59:59.000Z

108

Supplementary Material An ion-channel-containing model membrane: structural determination by magnetic contrast  

E-Print Network (OSTI)

by magnetic contrast neutron reflectometry Stephen A. Holt,*a Anton P. Le Brun,b Charles F. Majkrzak,c Duncan, UK.; E-mail: Anton.Le-Brun@newcastle.ac.uk: j.h.lakey@ncl.ac.uk c NIST Center for Neutron Research, Auckland 1142, NZ.; E-mail: d.mcgillivray@auckland.ac.nz Keywords: OmpF; Outer membrane; porin; neutron

Loesche, Mathias

109

Control of magnetic vortex chirality in square ring micromagnets Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556 and Materials Science  

E-Print Network (OSTI)

Control of magnetic vortex chirality in square ring micromagnets A. Libála Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556 and Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 M. Grimsditch Materials Science Division, Argonne National Laboratory

Metlushko, Vitali

110

NiFe2O4/activated carbon nanocomposite as magnetic material from petcoke  

Science Journals Connector (OSTI)

Abstract Nickel ferrite (NiFe2O4) was supported on activated carbon (AC) from petroleum coke (petcoke). Potassium hydroxide (KOH) was employed with petcoke to produce activated carbon. NiFe2O4 were synthesized using PEG-Oleic acid assisted hydrothermal method. The structural and magnetic properties were determined using thermogravimetric and differential thermal analysis (TGA–DTA), X-ray diffraction (XRD), Fourier Transform Infrared (IR-FT), surface area (BET), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and vibrating sample magnetometry (VSM). XRD analysis revealed the cubic spinel structure and ferrite phase with high crystallinity. IR-FT studies showed that chemical modification promoted the formation of surface oxygen functionalities. Morphological investigation by SEM showed conglomerates of spherical nanoparticles with an average particle size of 72 nm and TEM showed the formation of NiFe2O4/carbon nanofibers. Chemical modification and activation temperature of 800 °C prior to activation dramatically increased the BET surface area of the resulting activated carbon to 842.4 m2/g while the sulfur content was reduced from 6 to 1%. Magnetic properties of nanoparticles show strong dependence on the particle size.

Sarah Briceño; W. Brämer-Escamilla; P. Silva; J. García; H. Del Castillo; M. Villarroel; J.P. Rodriguez; M.A. Ramos; R. Morales; Y. Diaz

2014-01-01T23:59:59.000Z

111

Rare-Earth-Free Nanostructure Magnets: Rare-Earth-Free Permanent Magnets for Electric Vehicle Motors and Wind Turbine Generators: Hexagonal Symmetry Based Materials Systems Mn-Bi and M-type Hexaferrite  

SciTech Connect

REACT Project: The University of Alabama is developing new iron- and manganese-based composite materials for use in the electric motors of EVs and renewable power generators that will demonstrate magnetic properties superior to today’s best rare-earth-based magnets. Rare earths are difficult and expensive to refine. EVs and renewable power generators typically use rare earths to make their electric motors smaller and more powerful. The University of Alabama has the potential to improve upon the performance of current state-of-the-art rare-earth-based magnets using low-cost and more abundant materials such as manganese and iron. The ultimate goal of this project is to demonstrate improved performance in a full-size prototype magnet at reduced cost.

None

2012-01-01T23:59:59.000Z

112

magnets  

NLE Websites -- All DOE Office Websites (Extended Search)

I I Painless Physics Articles BEAM COOLING August 2, 1996 By Leila Belkora, Office of Public Affairs ACCELERATION August 16, 1996 By Dave Finley, Accelerator Division Head RF August 30, 1996 By Pat Colestock, Accelerator Division FIXED TARGET PHYSICS September 20, 1996 By Peter H. Garbincius, Physics Section FIXED TARGET PHYSICS PART DEUX October 16, 1996 By Peter H. Garbincius, Physics Section and Leila Belkora, Office of Public Affaris CROSS SECTION November 1, 1996 By Doreen Wackeroth, Theoretical Physics Edited by Leila Belkora, Office of Public Affaris MAGNETS PART I November 15, 1996 By Hank Glass, Technical Support Section Edited by Donald Sena, Office of Public Affairs MAGNETS PART II January 10, 1997 By Hank Glass, Technical Support Section Edited by Donald Sena, Office of Public Affairs

113

Magnetism  

Science Journals Connector (OSTI)

In our previous discussions of the electronic structure of materials we have assumed the one-electron approximation. The energy levels and the bandstructure were calculated for an electron in an effective pote...

Professor Dr. Harald Ibach; Professor Dr. Dr. h.c. Hans Lüth

2009-01-01T23:59:59.000Z

114

Method of making active magnetic refrigerant, colossal magnetostriction and giant magnetoresistive materials based on Gd-Si-Ge alloys  

DOE Patents (OSTI)

Method of making an active magnetic refrigerant represented by Gd.sub.5 (Si.sub.x Ge.sub.1-x).sub.4 alloy for 0.ltoreq.x.ltoreq.1.0 comprising placing amounts of the commercially pure Gd, Si, and Ge charge components in a crucible, heating the charge contents under subambient pressure to a melting temperature of the alloy for a time sufficient to homogenize the alloy and oxidize carbon with oxygen present in the Gd charge component to reduce carbon, rapidly solidifying the alloy in the crucible, and heat treating the solidified alloy at a temperature below the melting temperature for a time effective to homogenize a microstructure of the solidified material, and then cooling sufficiently fast to prevent the eutectoid decomposition and improve magnetocaloric and/or the magnetostrictive and/or the magnetoresistive properties thereof.

Gschneidner, Jr., Karl A. (Ames, IA); Pecharsky, Alexandra O. (Ames, IA); Pecharsky, Vitalij K. (Ames, IA)

2003-07-08T23:59:59.000Z

115

Characterization of proton exchange membrane materials for fuel cells by solid state nuclear magnetic resonance  

SciTech Connect

Solid-state nuclear magnetic resonance (NMR) has been used to explore the nanometer-scale structure of Nafion, the widely used fuel cell membrane, and its composites. We have shown that solid-state NMR can characterize chemical structure and composition, domain size and morphology, internuclear distances, molecular dynamics, etc. The newly-developed water channel model of Nafion has been confirmed, and important characteristic length-scales established. Nafion-based organic and inorganic composites with special properties have also been characterized and their structures elucidated. The morphology of Nafion varies with hydration level, and is reflected in the changes in surface-to-volume (S/V) ratio of the polymer obtained by small-angle X-ray scattering (SAXS). The S/V ratios of different Nafion models have been evaluated numerically. It has been found that only the water channel model gives the measured S/V ratios in the normal hydration range of a working fuel cell, while dispersed water molecules and polymer ribbons account for the structures at low and high hydration levels, respectively.

Kong, Zueqian

2010-03-15T23:59:59.000Z

116

Potential hazards and artifacts of ferromagnetic and nonferromagnetic surgical and dental materials and devices in nuclear magnetic resonance imaging  

SciTech Connect

The risks to patients with metal surgical implants who are undergoing nuclear magnetic resonance (NMR) imaging and the artifacts caused by such implants were studied. Twenty-one aneurysm and other hemostatic clips and a variety of other materials (e.g., dental amalgam, 14 karat gold) were used. Longitudinal forces and torques were found to be exerted upon 16 of the 21 clips. With five aneurysm clips, forces and torques sufficient to produce risk of hemorrhage from dislocation of the clip from the vessel or aneurysm, or cerebral injury by clip displacement without dislodgement were identified. The induced ferromagnetism was shown to be related to the composition of the alloys from which the clips were manufactured. Clips with 10-14% nickel are evidently without sufficient induced ferromagnetism to cause hazard. The extent of NMR imaging artifacts was greater for materials with measurable ferromagnetic properties, but metals without measurable ferromagnetism in our tests also resulted in significant artifacts. Dental amalgam and 14 karat gold produced no imaging artifacts, but stainless steels in dentures and orthodontic braces produced extensive artifacts in the facial region.

New, P.F.J. (Massachusetts General Hospital, Boston, MA); Rosen, B.R.; Brady, T.J.; Buonanno, F.S.; Kistler, J.P.; Burt, C.T.; Hinshaw, W.S.; Newhouse, J.H.; Pohost, G.M.; Taveras, J.M.

1983-04-01T23:59:59.000Z

117

Magnetic shielding  

DOE Patents (OSTI)

A magnetically-conductive filler material bridges the gap between a multi-part magnetic shield structure which substantially encloses a predetermined volume so as to minimize the ingress or egress of magnetic fields with respect to that volume. The filler material includes a heavy concentration of single-magnetic-domain-sized particles of a magnetically conductive material (e.g. soft iron, carbon steel or the like) dispersed throughout a carrier material which is generally a non-magnetic material that is at least sometimes in a plastic or liquid state. The maximum cross-sectional particle dimension is substantially less than the nominal dimension of the gap to be filled. An epoxy base material (i.e. without any hardening additive) low volatility vacuum greases or the like may be used for the carrier material. The structure is preferably exposed to the expected ambient magnetic field while the carrier is in a plastic or liquid state so as to facilitate alignment of the single-magnetic-domain-sized particles with the expected magnetic field lines. 3 figs.

Kerns, J.A.; Stone, R.R.; Fabyan, J.

1987-10-06T23:59:59.000Z

118

Magnetic shielding  

DOE Patents (OSTI)

A magnetically-conductive filler material bridges the gap between a multi-part magnetic shield structure which substantially encloses a predetermined volume so as to minimize the ingress or egress of magnetic fields with respect to that volume. The filler material includes a heavy concentration of single-magnetic-domain-sized particles of a magnetically conductive material (e.g. soft iron, carbon steel or the like) dispersed throughout a carrier material which is generally a non-magnetic material that is at least sometimes in a plastic or liquid state. The maximum cross-sectional particle dimension is substantially less than the nominal dimension of the gap to be filled. An epoxy base material (i.e. without any hardening additive) low volatility vacuum greases or the like may be used for the carrier material. The structure is preferably exposed to the expected ambient magnetic field while the carrier is in a plastic or liquid state so as to facilitate alignment of the single-magnetic-domain-sized particles with the expected magnetic field lines.

Kerns, John A. (Livermore, CA); Stone, Roger R. (Walnut Creek, CA); Fabyan, Joseph (Livermore, CA)

1987-01-01T23:59:59.000Z

119

Magnetic Materials (MM)  

NLE Websites -- All DOE Office Websites (Extended Search)

Beam Time Contacts Calendars Community Scientific Access Site Access Training Science & Education Science & Research Highlights Conferences Seminars Publications Annual Reports...

120

Experimental Investigation of Magnetic, Superconducting, and other Phase Transitions in novel F-Electron Materials at Ultra-high Pressures - Final Progress Report  

SciTech Connect

This grant, entitled “Experimental investigation of magnetic, superconducting and other phase transitions in novel f-electron materials at ultrahigh pressures,” spanned the funding period from May 1st, 2003 until April 30th, 2006. The major goal of this grant was to develop and utilize an ultrahigh pressure facility—capable of achieving very low temperatures, high magnetic fields, and extreme pressures as well as providing electrical resistivity, ac susceptibility, and magnetization measurement capabilities under pressure—for the exploration of magnetic, electronic, and structural phases and any corresponding interactions between these states in novel f-electron materials. Realizing this goal required the acquisition, development, fabrication, and implementation of essential equipment, apparatuses, and techniques. The following sections of this report detail the establishment of an ultrahigh pressure facility (Section 1) and measurements performed during the funding period (Section 2), as well as summarize the research project (Section 3), project participants and their levels of support (Section 4), and publications and presentations (Section 5).

Maple, Brian; Jeffires, Jason

2006-07-28T23:59:59.000Z

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


121

Magnetic shielding  

DOE Patents (OSTI)

A magnetically-conductive filler material bridges the gap between a multi-part magnetic shield structure which substantially encloses a predetermined volume so as to minimize the ingress or egress of magnetic fields with respect to that volume. The filler material includes a heavy concentration of single-magnetic-domain-sized particles of a magnetically conductive material (e.g. soft iron, carbon steel or the like) dispersed throughout a carrier material which is generally a non-magnetic material that is at least sometimes in a plastic or liquid state. The maximum cross-sectional particle dimension is substantially less than the nominal dimension of the gap to be filled. An epoxy base material (i.e. without any hardening additive) low volatility vacuum greases or the like may be used for the carrier material. The structure is preferably exposed to the expected ambient field while the carrier is in a plastic or liquid state so as to facilitate alignment of the single-magnetic-domain-sized particles with the expected magnetic field lines.

Kerns, J.A.; Stone, R.R.; Fabyan, J.

1985-02-12T23:59:59.000Z

122

Journal of Magnetism and Magnetic Materials 272276 (2004) e1333e1334 Non-local Hall resistance measured in submicron-scale  

E-Print Network (OSTI)

succeeded in detecting the spin- accumulation signal in the normal metal by the non- local spin-valve-related phenomenon like a spin-valve effect. When the spin-polarized electrons accumulate in a non-magnetic metal coefficient of 8:40 Ã? 10Ã?11 A=cm3 ; indicating the effect of the stray filed from the ferromagnetic layer

Otani, Yoshichika

123

Breaking symmetries in ordered materials : spin polarized light transport in magnetized noncentrosymmetric 1D photonic crystals, and photonic gaps and fabrication of quasiperiodic structured materials from interference lithography  

E-Print Network (OSTI)

Effects of breaking various symmetries on optical properties in ordered materials have been studied. Photonic crystals lacking space-inversion and time-reversal symmetries were shown to display nonreciprocal dispersion ...

Bita, Ion

2006-01-01T23:59:59.000Z

124

Learning About Magnets!  

NLE Websites -- All DOE Office Websites (Extended Search)

by the National High Magnetic Field Laboratory Learning About Name A magnet is a material or object that creates a magnetic fi eld. This fi eld is invisible, but it creates a...

125

E-Print Network 3.0 - amino-functionalized magnetic nano-adsorbent...  

NLE Websites -- All DOE Office Websites (Extended Search)

How do we measure magnetic properties... ? What are the atomic reasons for magnetism? How are magnetic material classified? Materials design... for magnetic...

126

Experimental Investigation of Magnetic Superconducting, and other Phase Transitions in Novel f-Electron Materials at Ultra-high Pressures Using Designer Diamond Anvils  

SciTech Connect

Pressure is a powerful control parameter, owing to its ability to affect crystal and electronic structure without introducing defects, for the investigation of condensed matter systems. Some f-electron, heavy-fermion materials display interesting and novel behavior when exposed to pressures achievable with conventional experimental techniques; however, a growing number of condensed matter systems require extreme conditions such as ultrahigh pressures, high magnetic fields, and ultralow temperatures to sufficiently explore the important properties. To that end, we have been funded to develop an ultrahigh pressure facility at the University of California, San Diego (UCSD) in order to investigate superconductivity, magnetism, non-Fermi liquid behavior, and other phenomena under extreme conditions. Our goals for the second year of this grant were as follows: (a) perform electrical resistivity measurements on novel samples at a myriad of pressures using conventional piston-cylinder techniques, Bridgman anvil techniques, and diamond anvil cell technology; (b) install, commission, and operate an Oxford Kelvinox MX-100 dilution refrigerator for access to ultralow temperatures and high magnetic fields. (c) continue the development of diamond anvil cell (DAC) technology. During the past year, we have successfully installed the Oxford Kelvinox MX-100 dilution refrigerator and verified its operability down to 12 mK. We have begun an experimental program to systematically investigate the f-electron compound URu2Si2 under pressure and in the presence of magnetic fields. We have also continued our collaborative work with Sam Weir at Lawrence Livermore National Laboratory (LLNL) on Au4V and implemented a new corollary study on Au1-xVx using ultrahigh pressures. We have continued developing our DAC facility by designing and constructing an apparatus for in situ pressure measurement as well as designing high pressure cells. This report serves to highlight the progress we have made towards developing an ultrahigh pressure research facility at UCSD, the research performed in the past year, as well as future directions we plan to pursue.

Maple, M. Brian

2005-09-13T23:59:59.000Z

127

Magnetism Highlights| Neutron Science | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Magnetism Magnetism SHARE Magnetism Highlights 1-5 of 5 Results ARCS maps collaborative magnetic spin behavior in iron telluride December 01, 2011 - Researchers have long thought that magnetism and superconductivity are mutually exclusive. The former typically involves localized atomic electrons. The latter requires freely propagating, itinerant electrons. Unexpected Magnetic Excitations in Doped Insulator Surprise Researchers October 01, 2011 - When doping a disordered magnetic insulator material with atoms of a nonmagnetic material, the conventional wisdom is that the magnetic interactions between the magnetic ions in the material will be weakened. Neutron Analysis Reveals Unique Atomic-Scale Behavior of "Cobalt Blue" September 01, 2011 - Neutron scattering studies of "cobalt blue," a

128

Magnetically attached sputter targets  

DOE Patents (OSTI)

An improved method and assembly for attaching sputtering targets to cathode assemblies of sputtering systems which includes a magnetically permeable material is described. The magnetically permeable material is imbedded in a target base that is brazed, welded, or soldered to the sputter target, or is mechanically retained in the target material. Target attachment to the cathode is achieved by virtue of the permanent magnets and/or the pole pieces in the cathode assembly that create magnetic flux lines adjacent to the backing plate, which strongly attract the magnetically permeable material in the target assembly. 11 figures.

Makowiecki, D.M.; McKernan, M.A.

1994-02-15T23:59:59.000Z

129

Ch 20. Magnetism Liu UCD Phy1B 2012 1  

E-Print Network (OSTI)

Ch 20. Magnetism Liu UCD Phy1B 2012 1 #12;I. MagnetI. Magnet Poles of a magnet: magnetic effect is strongest When the magnet is freely suspended North pole: pointing to north South pole: pointing to south Poles always come in pairs Liu UCD Phy1B 2012 2 #12;Magnetic MaterialsMagnetic Materials Magnetite Fe3O4

Yoo, S. J. Ben

130

In-situ magnetization of NdFeB magnets for permanent magnet machines  

SciTech Connect

In-situ magnetizers are needed to facilitate the assembly of permanent magnet machines and to remagnetize the magnets after weakening due to a fault condition. The air-core magnetizer in association with the silicon steel lamination structure of the rotor has advantages over its iron-core counterpart. This novel method has been used to magnetize the NdFeB magnets in a 30-hp permanent magnet synchronous motor. The magnetizing capability for different magnetizer geometries was investigated for the magnetization of NdFeB material. The design, testing, and operation of this magnetizer are reported in this paper.

Chang, L.; Eastham, T.R.; Dawson, G.E. (Dept. of Electrical Engineering, Queen's Univ., Kingston, Ontario K7L 3N6 (CA))

1991-09-01T23:59:59.000Z

131

Symmetry breaking in the formation of magnetic vortex states in a permalloy nanodisk  

E-Print Network (OSTI)

structure of magnetic vortex cores. Science 298, 6. Fischer,Magnetic Material Center, National Institute for Materials Science (Magnetic vortex core observation in circular dots of Permalloy. Science

Im, Mi-Young

2014-01-01T23:59:59.000Z

132

Nuclear Magnetic Resonance Studies of Macroscopic Morphology and Dynamics  

E-Print Network (OSTI)

Applications in Materials Magnetic Science, Agriculture andApplications in Materials Magnetic Science, Agriculture andMagnetic Resonance Studies of Macroscopic Morphology and Dynamics Geoffrey Alden Barrali Department of Chemistry University of California, Berkeley and Materials Sciences

Barrall, G.A.

2010-01-01T23:59:59.000Z

133

MagLab - MagLab Dictionary: Permanent Magnet (Transcript)  

NLE Websites -- All DOE Office Websites (Extended Search)

by Scott Hannahs, DC Facilities & Instrumentation director. Permanent magnet Field lines of a permanent magnet go from north to south. Permanent magnets are materials where...

134

Flipping the switch on magnetism in strontium titanate  

NLE Websites -- All DOE Office Websites (Extended Search)

Flipping the switch on magnetism in strontium titanate Flipping the switch on magnetism in strontium titanate Researchers have found a way to magnetize this material using light,...

135

Controlled interface profile in SmCo/Fe exchange-spring magnets Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439  

E-Print Network (OSTI)

-spring permanent magnets enhances the exchange coupling effectiveness without modifying the local composition are complementary or even mutually exclusive. Exchange-spring nanocomposite magnets1,2 consist of exchange coupled of the exchange-spring magnets. For example, interfacial condi- tions influence the exchange coupling

Liu, J. Ping

136

Irreversible Thermodynamics and Smart Materials Systems Modelling. Example of  

E-Print Network (OSTI)

Irreversible Thermodynamics and Smart Materials Systems Modelling. Example of Magnetic Shape Memory mechanisms in smart materials. This procedure is applied to Magnetic Shape Memory Alloys actuators of complex active materials for smart systems. Keywords: Smart material systems, Actuator design

Paris-Sud XI, Université de

137

BEPC-II Magnet Project | Superconducting Magnet Division  

NLE Websites -- All DOE Office Websites (Extended Search)

BEPC-II Magnet Project BEPC-II Magnet Project Project Overview The BEPC-II magnets are Interaction Region magnets to be used as part of an upgrade to the Beijing Electron Positron Collider. Two magnets will be produced, both of which will be inserted within the solenoidal detector at one of the collision points. Since the best use of the quadrupole focusing in this case requires placing the magnet as close to the collision point as possible, these magnets will be used within the magnetic field of the detector. This constrains the materials that can be used for construction to only non-magnetic materials. It also places severe demands on the structure of the magnet and it's holding supports due to the reaction forces between the solenoid and the magnet. To create the coil pattern for the final magnet, the coils will be

138

Magnetism in metal-organic capsules  

E-Print Network (OSTI)

Quantum Spin Chains in Magnetism: Molecules to Materials, J.Magnetism in metal-organic capsules Jerry L. Atwood,* a Euan

Atwood, Jerry L.

2010-01-01T23:59:59.000Z

139

Magnetic Material for PM Motors  

Energy.gov (U.S. Department of Energy (DOE))

2009 DOE Hydrogen Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting, May 18-22, 2009 -- Washington D.C.

140

Magnetic Material for PM Motors  

Energy.gov (U.S. Department of Energy (DOE))

Presentation from the U.S. DOE Office of Vehicle Technologies "Mega" Merit Review 2008 on February 25, 2008 in Bethesda, Maryland.

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


141

E-Print Network 3.0 - amorphous soft magnetic Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

of Materials Science and Engineering, Carnegie Mellon University Collection: Materials Science 5 Magnetic Nanocomposite Materials for High Temperature Applications Frank...

142

Nanocomposite Magnets: Transformational Nanostructured Permanent Magnets  

SciTech Connect

Broad Funding Opportunity Announcement Project: GE is using nanomaterials technology to develop advanced magnets that contain fewer rare earth materials than their predecessors. Nanomaterials technology involves manipulating matter at the atomic or molecular scale, which can represent a stumbling block for magnets because it is difficult to create a finely grained magnet at that scale. GE is developing bulk magnets with finely tuned structures using iron-based mixtures that contain 80% less rare earth materials than traditional magnets, which will reduce their overall cost. These magnets will enable further commercialization of HEVs, EVs, and wind turbine generators while enhancing U.S. competitiveness in industries that heavily utilize these alternatives to rare earth minerals.

None

2010-10-01T23:59:59.000Z

143

Materials/Condensed Matter  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials/Condensed Matter Print Materials/Condensed Matter Print Materials research provides the foundation on which the economic well being of our high-tech society rests. The impact of advanced materials ranges dramatically over every aspect of our modern world from the minutiae of daily life to the grand scale of our national economy. Invariably, however, breakthroughs to new technologies trace their origin both to fundamental research in the basic properties of condensed matter and to applied research aimed at manipulating properties (structural, physical, chemical, electrical, magnetic, optical, etc.). Increasingly, the frontiers of materials research include materials that are "strongly correlated," characterized by strong coupling between a material's electrons with other electrons, magnetism, or the material lattice itself. This coupling often results in novel behavior, such as superconductivity, that may lead to technologically important applications.

144

National High Magnetic Field Laboratory - Mission  

NLE Websites -- All DOE Office Websites (Extended Search)

research to serve an interdisciplinary scientific user community spanning materials science, condensed matter physics, magnet technology, chemistry, and biology. Provide...

145

Permanent Magnet Ecr Plasma Source With Magnetic Field Optimization  

DOE Patents (OSTI)

In a plasma-producing device, an optimized magnet field for electron cyclotron resonance plasma generation is provided by a shaped pole piece. The shaped pole piece adjusts spacing between the magnet and the resonance zone, creates a convex or concave resonance zone, and decreases stray fields between the resonance zone and the workpiece. For a cylindrical permanent magnet, the pole piece includes a disk adjacent the magnet together with an annular cylindrical sidewall structure axially aligned with the magnet and extending from the base around the permanent magnet. The pole piece directs magnetic field lines into the resonance zone, moving the resonance zone further from the face of the magnet. Additional permanent magnets or magnet arrays may be utilized to control field contours on a local scale. Rather than a permeable material, the sidewall structure may be composed of an annular cylindrical magnetic material having a polarity opposite that of the permanent magnet, creating convex regions in the resonance zone. An annular disk-shaped recurve section at the end of the sidewall structure forms magnetic mirrors keeping the plasma off the pole piece. A recurve section composed of magnetic material having a radial polarity forms convex regions and/or magnetic mirrors within the resonance zone.

Doughty, Frank C. (Plano, TX); Spencer, John E. (Plano, TX)

2000-12-19T23:59:59.000Z

146

Cool Magnetic Molecules  

NLE Websites -- All DOE Office Websites (Extended Search)

Cool Magnetic Molecules Cool Magnetic Molecules Cool Magnetic Molecules Print Wednesday, 25 May 2011 00:00 Certain materials are known to heat up or cool down when they are exposed to a changing magnetic field. This is known as the magnetocaloric effect. All magnetic materials exhibit this effect, but in most cases, it is too small to be technologically useful. Recently, however, the search for special molecules with a surprisingly large capacity to keep cool has heated up, driven by environmental and cost considerations as well as by recent improvements in our ability to design, assemble, and probe the structure and chemistry of small molecules. An international collaboration of researchers from Spain, Scotland, and the U.S. has utilized ALS Beamline 11.3.1 (small-molecule crystallography) to characterize the design of such "molecular coolers." The work targets the synthesis of molecular cluster compounds containing many unpaired electrons ("nanomagnets") for applications involving enhanced magnetic refrigeration at very low temperatures.

147

Superconducting Magnet Safety Nuclear Magnetic Resonance (NMR) facilities present unique hazards not found in most  

E-Print Network (OSTI)

Superconducting Magnet Safety Nuclear Magnetic Resonance (NMR) facilities present unique hazards or steel reinforced concrete, these ferromagnetic materials may have an effect on the magnetic field environmental temperature control is required (2) Structural support for heavy equipment and vibration control

Maroncelli, Mark

148

Magnetic Exchange Coupling and Single-Molecule Magnetism in Uranium Complexes  

E-Print Network (OSTI)

J. -P. ; Kahn, M. L. In Magnetism: Molecules to Materials V.R. Simple Models of Magnetism; Oxford University Press:for interpreting uranium magnetism and will be discussed in

Rinehart, Jeffrey Dennis

2010-01-01T23:59:59.000Z

149

Materials Science Division - Argonne National Laboratories, Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Home Home About MSD Information Awards Visit MSD Administrative Staff Division Personnel Research Research Groups Condensed Matter Theory Emerging Materials Energy Conversion and Storage Magnetic Films Molecular Materials Neutron and X-ray Scattering Superconductivity and Magnetism Surface Chemistry Synchrotron Radiation Studies Threat Detection and Analysis Group Research Areas Careers in MSD Internal Sites Search Front Slide 1 November 2013 - Patricia Dehmer (second from right), Deputy Director of Science Programs, DOE Office of Science, joined Argonne Director Eric Isaacs(left) and Associate Laboratory Director for Physical Sciences and Engineering Peter Littlewood(second from left) to tour the recently-opened Energy Sciences Building. Among Dehmer's stops was the crystal growth

150

Critical Materials Strategy Summary  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

diplomacy. As the nation's leading funder of research on the physical sciences, DOE's capabilities with respect to materials research are substantial. Topics identified for priority research attention include rare earth substitutes in magnets, batteries, photovoltaic films and phosphors; environmentally sound mining and materials processing; and recycling. The eight programs and policies address risks, con- straints and opportunities across the supply chain,

151

Critical Materials Strategy Summary  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

diplomacy. As the nation's leading funder of research on the physical sciences, DOE's capabilities with respect to materials research are substantial. Topics identified for priority research attention include rare earth substitutes in magnets, batteries, photovoltaic films and phosphors; environmentally sound mining and materials processing; and recycling. The eight programs and policies address risks, con- straints and opportunities across the supply chain,

152

Magnetic structure and hysteresis in hard magnetic nanocrystalline film: Computer simulation  

E-Print Network (OSTI)

Magnetic structure and hysteresis in hard magnetic nanocrystalline film: Computer simulation Taylor Road, Piscataway, New Jersey 08854 Andrei Kazaryan and Yunzhi Wang Department of Materials Science of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 Armen G

Laughlin, David E.

153

Effect of magnetic anisotropy on magnetic shaking E. Papernoa)  

E-Print Network (OSTI)

Effect of magnetic anisotropy on magnetic shaking E. Papernoa) and I. Sasada Department of Applied Science for Electronics and Materials, Kyushu University, 6-1 Kasuga-Koen, Kasuga-Shi, Fukuoka 816-8580, Japan The effect of magnetic shaking on both the transverse and axial shielding factors TSF and ASF

Paperno, Eugene

154

Synthesis, crystal structure and magnetic property of a new 1D molecular material [1-(4'-chlorobenzyl)-4-aminopyridinium](+) bis(maleonitriledithiolato)nickel(-)  

SciTech Connect

A new ion-pair complex, [1-(4'-chlorobenzyl)-4-aminopyridinium](+)bis(maleonitrile-dithiolato) nickel(-),[ClbzPyNH{sub 2}][Ni(mnt){sub 2}] (1), has been prepared and characterized. X-ray single crystal structure conforms that the Ni(mnt){sub 2}{sup -} anions and [ClbzPyNH{sub 2}]{sup +} cations of 1 form completely segregated uniform stacking columns with the Ni...Ni distance 3.944A in the Ni(mnt){sub 2}{sup -} stacking column. The temperature dependence of the magnetic susceptibility reveals that 1 undergoes a magnetic transition, and exhibits ferromagnetic interaction in the high-temperature phase and spin gap system in the low-temperature phase.

Ni Chunlin [State Key Laboratory of Coordination Chemistry, Department of Chemistry, Coordination Chemistry Institute, Nanjing University, Hankou Road, Number 22, Nanjing city, Jiangsu province 210093 (China); Dang Dongbin [State Key Laboratory of Coordination Chemistry, Department of Chemistry, Coordination Chemistry Institute, Nanjing University, Hankou Road, Number 22, Nanjing city, Jiangsu province 210093 (China); Li Yizhi [State Key Laboratory of Coordination Chemistry, Department of Chemistry, Coordination Chemistry Institute, Nanjing University, Hankou Road, Number 22, Nanjing city, Jiangsu province 210093 (China); Gao Song [State Key Laboratory of Rare Earth Materials Chemistry and Applications, Peking University, 100 871 Beijing (China); Ni Zhaoping [State Key Laboratory of Coordination Chemistry, Department of Chemistry, Coordination Chemistry Institute, Nanjing University, Hankou Road, Number 22, Nanjing city, Jiangsu province 210093 (China); Tian Zhengfang [State Key Laboratory of Coordination Chemistry, Department of Chemistry, Coordination Chemistry Institute, Nanjing University, Hankou Road, Number 22, Nanjing city, Jiangsu province 210093 (China); Meng Qingjin [State Key Laboratory of Coordination Chemistry, Department of Chemistry, Coordination Chemistry Institute, Nanjing University, Hankou Road, Number 22, Nanjing city, Jiangsu province 210093 (China)]. E-mail: njuchem1024@163.com

2005-01-15T23:59:59.000Z

155

National High Magnetic Field Laboratory - Science Starts Here...  

NLE Websites -- All DOE Office Websites (Extended Search)

matter physicist who investigates magnetism of nanostructured objects including magnetic nanoparticles, biomolecules and biologically inspired materials. In her own words I...

156

Cool Magnetic Molecules  

NLE Websites -- All DOE Office Websites (Extended Search)

Cool Magnetic Molecules Print Cool Magnetic Molecules Print Certain materials are known to heat up or cool down when they are exposed to a changing magnetic field. This is known as the magnetocaloric effect. All magnetic materials exhibit this effect, but in most cases, it is too small to be technologically useful. Recently, however, the search for special molecules with a surprisingly large capacity to keep cool has heated up, driven by environmental and cost considerations as well as by recent improvements in our ability to design, assemble, and probe the structure and chemistry of small molecules. An international collaboration of researchers from Spain, Scotland, and the U.S. has utilized ALS Beamline 11.3.1 (small-molecule crystallography) to characterize the design of such "molecular coolers." The work targets the synthesis of molecular cluster compounds containing many unpaired electrons ("nanomagnets") for applications involving enhanced magnetic refrigeration at very low temperatures.

157

Cool Magnetic Molecules  

NLE Websites -- All DOE Office Websites (Extended Search)

Cool Magnetic Molecules Print Cool Magnetic Molecules Print Certain materials are known to heat up or cool down when they are exposed to a changing magnetic field. This is known as the magnetocaloric effect. All magnetic materials exhibit this effect, but in most cases, it is too small to be technologically useful. Recently, however, the search for special molecules with a surprisingly large capacity to keep cool has heated up, driven by environmental and cost considerations as well as by recent improvements in our ability to design, assemble, and probe the structure and chemistry of small molecules. An international collaboration of researchers from Spain, Scotland, and the U.S. has utilized ALS Beamline 11.3.1 (small-molecule crystallography) to characterize the design of such "molecular coolers." The work targets the synthesis of molecular cluster compounds containing many unpaired electrons ("nanomagnets") for applications involving enhanced magnetic refrigeration at very low temperatures.

158

Cool Magnetic Molecules  

NLE Websites -- All DOE Office Websites (Extended Search)

Cool Magnetic Molecules Print Cool Magnetic Molecules Print Certain materials are known to heat up or cool down when they are exposed to a changing magnetic field. This is known as the magnetocaloric effect. All magnetic materials exhibit this effect, but in most cases, it is too small to be technologically useful. Recently, however, the search for special molecules with a surprisingly large capacity to keep cool has heated up, driven by environmental and cost considerations as well as by recent improvements in our ability to design, assemble, and probe the structure and chemistry of small molecules. An international collaboration of researchers from Spain, Scotland, and the U.S. has utilized ALS Beamline 11.3.1 (small-molecule crystallography) to characterize the design of such "molecular coolers." The work targets the synthesis of molecular cluster compounds containing many unpaired electrons ("nanomagnets") for applications involving enhanced magnetic refrigeration at very low temperatures.

159

Cool Magnetic Molecules  

NLE Websites -- All DOE Office Websites (Extended Search)

Cool Magnetic Molecules Print Cool Magnetic Molecules Print Certain materials are known to heat up or cool down when they are exposed to a changing magnetic field. This is known as the magnetocaloric effect. All magnetic materials exhibit this effect, but in most cases, it is too small to be technologically useful. Recently, however, the search for special molecules with a surprisingly large capacity to keep cool has heated up, driven by environmental and cost considerations as well as by recent improvements in our ability to design, assemble, and probe the structure and chemistry of small molecules. An international collaboration of researchers from Spain, Scotland, and the U.S. has utilized ALS Beamline 11.3.1 (small-molecule crystallography) to characterize the design of such "molecular coolers." The work targets the synthesis of molecular cluster compounds containing many unpaired electrons ("nanomagnets") for applications involving enhanced magnetic refrigeration at very low temperatures.

160

Cool Magnetic Molecules  

NLE Websites -- All DOE Office Websites (Extended Search)

Cool Magnetic Molecules Print Cool Magnetic Molecules Print Certain materials are known to heat up or cool down when they are exposed to a changing magnetic field. This is known as the magnetocaloric effect. All magnetic materials exhibit this effect, but in most cases, it is too small to be technologically useful. Recently, however, the search for special molecules with a surprisingly large capacity to keep cool has heated up, driven by environmental and cost considerations as well as by recent improvements in our ability to design, assemble, and probe the structure and chemistry of small molecules. An international collaboration of researchers from Spain, Scotland, and the U.S. has utilized ALS Beamline 11.3.1 (small-molecule crystallography) to characterize the design of such "molecular coolers." The work targets the synthesis of molecular cluster compounds containing many unpaired electrons ("nanomagnets") for applications involving enhanced magnetic refrigeration at very low temperatures.

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


161

Power-Invariant Magnetic System Modeling  

E-Print Network (OSTI)

properties and characteristics. Progress in magnetism was made after Oersted discovered in 1820 that a magnetic field could be generated with an electric current. Famous scientists, including Gauss, Maxwell and Faraday, tackled the phenomenon of magnetism... flows in the material. Meanwhile, in magnetic circuits, the reluctance is a measure of magnetic energy storage rather than being a measure of magnetic energy dissipation. 2. The Permeance-Capacitor Model In 1969, Dr. R.W. Buntenbach from...

Gonzalez Dominguez, Guadalupe Giselle

2012-10-19T23:59:59.000Z

162

Argonne CNM: Materials Synthesis Capabilities  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Synthesis Facilities Materials Synthesis Facilities Capabilities biosynthesis View larger image. Biosynthesis Methods Peptide and DNA synthesis (E. Rozhkova, Nanobio Interfaces Group) Nanobio hybrid synthesis (T. Rajh, Nanobio Interfaces Group) Hierarchal assembly View larger image. Hierarchical Assembly Bottom-up polymeric and bio-templating as well as lithographically directed self-assembly (S. Darling, Electronic & Magnetic Materials & Devices Group; E. Rozhkova, Nanobio Interfaces Group) Molecular beam epitaxy View high-resolution image. Molecular Beam Epitaxy Complex oxide nanoferroelectric and nanoferromagnetic materials and devices created using a DCA R450D Custom MBE instrument (A. Bhattacharya, Electronic & Magnetic Materials & Devices Group) Nanoparticle synthesis

163

Department of Advanced Materials Science  

E-Print Network (OSTI)

@k.u-tokyo.ac.jpe-mail 04-7136-3781T E L Environmental-friendly materials process, Metal smelting and re ning process of Advanced Materials Science masashi@issp.u-tokyo.ac.jpe-mail 04-7136-3225T E L Nuclear magnetic resonance New Materials Synthesis, Superconductivity, Quantum Spin Liquid,Topological Hall Effect takatama

Katsumoto, Shingo

164

Materialism and materiality  

Science Journals Connector (OSTI)

Accountants and auditors in recent financial scandals have been pictured as materialistic, simply calculating consequences and ignoring duties. This paper potentially explains this apparently materialistic behaviour in what has historically been a truthtelling profession. Materiality, which drives audit priorities, has been institutionalised in accounting and auditing standards. But a materiality focus inherently implies that all amounts that are not 'materially' misstated are equally true. This leads to habitual immaterial misstatements and promotes the view that auditors do not care about truth at all. Auditors' lack of commitment to truth undermines their claim to be professionals in the classic sense.

Michael K. Shaub

2005-01-01T23:59:59.000Z

165

Magnetic Spinner  

Science Journals Connector (OSTI)

A science toy sometimes called the “magnetic spinner” is an interesting class demonstration to illustrate the principles of magnetic levitation. It can also be used to demonstrate Faraday's law and a horizontally suspended physical pendulum. The levitated part contains two circular magnets encased in a plastic housing. Each magnet stays above two triangular magnets fixed to the base. The magnetic repulsive force experienced by the circular magnets is independent of their orientation; therefore the holder of these magnets can be rotated without affecting its stability. The holder with the circular magnets can be oscillated up and down as a horizontally suspended physical pendulum.

P. J. Ouseph

2006-01-01T23:59:59.000Z

166

Large Superconducting Magnet Systems  

E-Print Network (OSTI)

The increase of energy in accelerators over the past decades has led to the design of superconducting magnets for both accelerators and the associated detectors. The use of Nb?Ti superconducting materials allows an increase in the dipole field by up to 10 T compared with the maximum field of 2 T in a conventional magnet. The field bending of the particles in the detectors and generated by the magnets can also be increased. New materials, such as Nb3Sn and high temperature superconductor (HTS) conductors, can open the way to higher fields, in the range 13–20 T. The latest generations of fusion machines producing hot plasma also use large superconducting magnet systems.

Védrine, P

2014-01-01T23:59:59.000Z

167

Magnetic Force Between Magnetic Nano Probes at Optical Frequency  

E-Print Network (OSTI)

Magnetic force microscopy based on the interaction of static magnetic materials was demonstrated in the past with resolutions in the order of nanometers. Measurement techniques based on forces between electric dipoles oscillating at optical frequencies have been also demonstrated leading to the standard operation of the scanning force microscope (SFM). However the investigations of a SFM based on the magnetic force generated by magnetic dipole moments oscillating at optical frequencies has not been tackled yet. With this goal in mind we establish a theoretical model towards observable magnetic force interaction between two magnetically polarizable nanoparticles at optical frequency and show such a force to be in the order of piconewtons which could be in principle detected by conventional microscopy techniques. Two possible principles for conceiving magnetically polarizable nano probes able to generate strong magnetic dipoles at optical frequency are investigated based on silicon nanoparticles and on clusters...

Guclu, Caner; Capolino, Filippo

2014-01-01T23:59:59.000Z

168

Acta Physicae Superficierum Vol VII 2004 EXPLORING ARTIFICIAL MAGNETISM  

E-Print Network (OSTI)

Acta Physicae Superficierum · Vol VII · 2004 EXPLORING ARTIFICIAL MAGNETISM FROM THIN FILMS of artificially structured, new magnetic materials play a fundamental role in modern science and technology. From thin films to patterned magnetic nano-structures, these magnetic materials and systems can be utilized

Rau, Carl

169

Permanent magnet multipole with adjustable strength  

DOE Patents (OSTI)

Two or more magnetically soft pole pieces are symmetrically positioned along a longitudinal axis to provide a magnetic field within a space defined by the pole pieces. Two or more permanent magnets are mounted to an external magnetically-soft cylindrical sleeve which rotates to bring the permanent magnets into closer coupling with the pole pieces and thereby adjustably control the field strength of the magnetic field produced in the space defined by the pole pieces. The permanent magnets are preferably formed of rare earth cobalt (REC) material which has a high remanent magnetic field and a strong coercive force. The pole pieces and the permanent magnets have corresponding cylindrical surfaces which are positionable with respect to each other to vary the coupling therebetween. Auxiliary permanent magnets are provided between the pole pieces to provide additional magnetic flux to the magnetic field without saturating the pole pieces.

Halbach, Klaus (Berkeley, CA)

1985-01-01T23:59:59.000Z

170

Permanent-magnet multipole with adjustable strength  

DOE Patents (OSTI)

Two or more magnetically soft pole pieces are symmetrically positioned along a longitudinal axis to provide a magnetic field within a space defined by the pole pieces. Two or more permanent magnets are mounted to an external magnetically-soft cylindrical sleeve which rotates to bring the permanent magnets into closer coupling with the pole pieces and thereby adjustably control the field strength of the magnetic field produced in the space defined by the pole pieces. The permanent magnets are preferably formed of rare earth cobalt (REC) material which has a high remanent magnetic field and a strong coercive force. The pole pieces and the permanent magnets have corresponding cylindrical surfaces which are positionable with respect to each other to vary the coupling there between. Auxiliary permanent magnets are provided between the pole pieces to provide additional magnetic flux to the magnetic field without saturating the pole pieces.

Halbach, K.

1982-09-20T23:59:59.000Z

171

Superconducting Magnet Division  

NLE Websites -- All DOE Office Websites (Extended Search)

3 - 6/13/06 3 - 6/13/06 Superconducting Magnet Division S&T Committee Program Review June 22-23, 2006 Conference Room A, Bldg. 725, BNL DRAFT AGENDA Thursday, June 22 0830 Executive Session to address the charge S. Aronson (25 min) 0855 Welcome S. Aronson (5 min) 0900 Superconducting Magnet Division Status & M. Harrison (45 + 15 min) Issues - mission statement, core competencies, themes, program, problems, etc. 1000 Themes - Nb3Sn, HTS, Direct wind, Accelerator integration, P. Wanderer (20 + 10 min) rapid cycling Core Competencies 1030 Superconducting Materials A. Ghosh (20 + 5 min) 1055 Break 1110 Magnetic Design R. Gupta (20 + 5 min) 1135 Magnet Construction M. Anerella (20 + 5 min) 1200 Magnet Testing G. Ganetis (20 + 5 min)

172

Electric-Field Control of Magnetism Intrinsic magnetoelectric coupling describes the microscopic interaction between magnetic and  

E-Print Network (OSTI)

Electric-Field Control of Magnetism Intrinsic magnetoelectric coupling describes the microscopic interaction between magnetic and electric polarization in a single-phase material. The control of the magnetic state of a material with an electric field is an enticing prospect for device engineering. MRSEC

Maroncelli, Mark

173

Research - Argonne National Laboratories, Materials Sicence Division  

NLE Websites -- All DOE Office Websites (Extended Search)

Research Research Research Groups in the Materials Science Division Condensed Matter Theory Carries out theoretical work on superconductivity, electronic structure and magnetism. Emerging Materials Emphasizes an integrated materials synthesis and science program that focuses on correlated electron transition metal oxides, chalcogenides with enhanced thermoelectric performance, and novel superconductors, including pnictides and cuprates. Energy Conversion and Storage The energy conversion and storage group focuses on charge-transfer processes, as well as the chemical environment in the vicinity of electrode surfaces. Magnetic Films Research to develop, characterize and investigate the properties of magnetic thin films and superlattices. Molecular Materials Synthesis and characterization of molecular materials that have novel

174

Critical Materials Hub  

Energy.gov (U.S. Department of Energy (DOE))

Critical materials, including some rare earth elements that possess unique magnetic, catalytic, and luminescent properties, are key resources needed to manufacture products for the clean energy economy. These materials are so critical to the technologies that enable wind turbines, solar panels, electric vehicles, and energy-efficient lighting that DOE's 2010 and 2011 Critical Materials Strategy reported that supply challenges for five rare earth metals—dysprosium, neodymium, terbium, europium, and yttrium—could affect clean energy technology deployment in the coming years.1, 2

175

Method for obtaining large levitation pressure in superconducting magnetic bearings  

DOE Patents (OSTI)

A method and apparatus are disclosed for compressing magnetic flux to achieve high levitation pressures. Magnetic flux produced by a magnetic flux source travels through a gap between two high temperature superconducting material structures. The gap has a varying cross-sectional area to compress the magnetic flux, providing an increased magnetic field and correspondingly increased levitation force in the gap. 4 figs.

Hull, J.R.

1997-08-05T23:59:59.000Z

176

Materials Characterization | Advanced Materials | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Electron Microscopy X-ray Scattering Neutron Scattering Mechanical Properties Thermal Optical Spectroscopy Nuclear Magnetic Resonance Macromolecular Characterization Nuclear...

177

Magnetic nanoworms Systematic Surface Engineering of Magnetic Nanoworms  

E-Print Network (OSTI)

Magnetic nanoworms Systematic Surface Engineering of Magnetic Nanoworms for in vivo Tumor Targeting and nanoparticle chemistry for tumor targeting. full papers [Ã?] Prof. M. J. Sailor, J.-H. Park Materials Science, Dr. T. J. Harris Harvard-MIT Division of Health Sciences and Technology Massachusetts Institute

Bhatia, Sangeeta

178

Magnetism.1  

Science Journals Connector (OSTI)

... each complete magnets with a pair of poles. The general character of the earth's magnetism has long been known—that the earth behaves with regard to magnets as though it ... and that these poles have a slow secular motion. For many years the earth's magnetism has been the subject of careful study by the most powerful minds. Gauss organized ...

1890-01-16T23:59:59.000Z

179

MAGNETIC NEUTRON SCATTERING  

SciTech Connect

Much of our understanding of the atomic-scale magnetic structure and the dynamical properties of solids and liquids was gained from neutron-scattering studies. Elastic and inelastic neutron spectroscopy provided physicists with an unprecedented, detailed access to spin structures, magnetic-excitation spectra, soft-modes and critical dynamics at magnetic-phase transitions, which is unrivaled by other experimental techniques. Because the neutron has no electric charge, it is an ideal weakly interacting and highly penetrating probe of matter's inner structure and dynamics. Unlike techniques using photon electric fields or charged particles (e.g., electrons, muons) that significantly modify the local electronic environment, neutron spectroscopy allows determination of a material's intrinsic, unperturbed physical properties. The method is not sensitive to extraneous charges, electric fields, and the imperfection of surface layers. Because the neutron is a highly penetrating and non-destructive probe, neutron spectroscopy can probe the microscopic properties of bulk materials (not just their surface layers) and study samples embedded in complex environments, such as cryostats, magnets, and pressure cells, which are essential for understanding the physical origins of magnetic phenomena. Neutron scattering is arguably the most powerful and versatile experimental tool for studying the microscopic properties of the magnetic materials. The magnitude of the cross-section of the neutron magnetic scattering is similar to the cross-section of nuclear scattering by short-range nuclear forces, and is large enough to provide measurable scattering by the ordered magnetic structures and electron spin fluctuations. In the half-a-century or so that has passed since neutron beams with sufficient intensity for scattering applications became available with the advent of the nuclear reactors, they have became indispensable tools for studying a variety of important areas of modern science, ranging from large-scale structures and dynamics of polymers and biological systems, to electronic properties of today's technological materials. Neutron scattering developed into a vast field, encompassing many different experimental techniques aimed at exploring different aspects of matter's atomic structure and dynamics. Modern magnetic neutron scattering includes several specialized techniques designed for specific studies and/or particular classes of materials. Among these are magnetic reflectometry aimed at investigating surfaces, interfaces, and multilayers, small-angle scattering for the large-scale structures, such as a vortex lattice in a superconductor, and neutron spin-echo spectroscopy for glasses and polymers. Each of these techniques and many others offer exciting opportunities for examining magnetism and warrant extensive reviews, but the aim of this chapter is not to survey how different neutron-scattering methods are used to examine magnetic properties of different materials. Here, we concentrate on reviewing the basics of the magnetic neutron scattering, and on the recent developments in applying one of the oldest methods, the triple axis spectroscopy, that still is among the most extensively used ones. The developments discussed here are new and have not been coherently reviewed. Chapter 2 of this book reviews magnetic small-angle scattering, and modern techniques of neutron magnetic reflectometry are discussed in Chapter 3.

ZALIZNYAK,I.A.; LEE,S.H.

2004-07-30T23:59:59.000Z

180

Earth’s magnetism  

Science Journals Connector (OSTI)

Earth’s magnetism, geomagnetism, terrestrial magnetism [The magnetism of the Earth] ? Erdmagnetismus m, Geomagnetismus

2014-08-01T23:59:59.000Z

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


181

Materials Science  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Science Materials Science Materials Science1354608000000Materials ScienceSome of these resources are LANL-only and will require Remote Access./No/Questions? 667-5809library@lanl.gov Materials Science Some of these resources are LANL-only and will require Remote Access. Key Resources Data Sources Reference Organizations Journals Key Resources CINDAS Materials Property Databases video icon Thermophysical Properties of Matter Database (TPMD) Aerospace Structural Metals Database (ASMD) Damage Tolerant Design Handbook (DTDH) Microelectronics Packaging Materials Database (MPMD) Structural Alloys Handbook (SAH) Proquest Technology Collection Includes the Materials Science collection MRS Online Proceedings Library Papers presented at meetings of the Materials Research Society Data Sources

182

Magnetism in bcc cobalt  

Science Journals Connector (OSTI)

Local-spin-density-approximation-based calculations, performed using a general-potential linearized augmented-plane-wave method, are presented for bcc Co. The ground-state properties and magnetization energies are reported. It is found that the moment is strongly suppressed in constrained antiferromagnetic calculations, indicating that a local-moment picture is less appropriate for this material than for bcc iron.

D. J. Singh

1992-02-01T23:59:59.000Z

183

Reference Material  

NLE Websites -- All DOE Office Websites (Extended Search)

Reference Materials There are a variety of reference materials the NSSAB utilizes and have been made available on its website. Documents Fact Sheets - links to Department of Energy...

184

Materials Science  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Science science-innovationassetsimagesicon-science.jpg Materials Science National security depends on science and technology. The United States relies on Los Alamos...

185

High Field Magnetic Resonance Facility  

NLE Websites -- All DOE Office Websites (Extended Search)

HFMRF Overview HFMRF Overview Section 2-3-1 High Field Magnetic Resonance Facility The High Field Magnetic Resonance Facility (HFMRF) focuses a significant portion of its research on developing a fundamental, molecular-level understanding of biochemical and biological systems and their response to environmental effects. A secondary focus is materials science, including catalysis and chemical mechanisms and processes. Staff and science consultants within this facility offer expertise in the areas of structural biology, solid-state materials characterization, and magnetic resonance imaging (MRI) techniques. Research activities in the HFMRF include: * structure determination of large molecular assemblies such as protein-DNA (normal and damaged DNA) and protein-RNA complexes

186

E-Print Network 3.0 - applied homogeneous magnetic Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Karsten - Physikalisches Institut, Universitt Bonn Collection: Physics ; Materials Science 6 Magnetic anisotropy in Fe-25Cr-12Co-1Si alloy induced by external magnetic field...

187

DEARING, J. A., AND R. J. FLOWER. The magnetic susceptibility of ...  

Science Journals Connector (OSTI)

Jun 2, 1981 ... The magnetic susceptibility of sedimenting material trapped in ... magnetic susceptibility of ..... the soil and its significance in soil science: A.

2000-01-19T23:59:59.000Z

188

E-Print Network 3.0 - anomalous magnetic behavior Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

of Physics, University of Maryland at College Park Collection: Engineering ; Materials Science 3 Probing the magnetic microstructure of an amorphous GdFe system with magnetic...

189

E-Print Network 3.0 - artificial molecular magnets Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

ligands. The calculations show that the inherent spin magnetic... for new nanoscale magnetic materials. Single molecular ... Source: Kern, Klaus - Nanoscale Science...

190

Localized Magnetic States in Graphene  

Science Journals Connector (OSTI)

We examine the conditions necessary for the presence of localized magnetic moments on adatoms with inner shell electrons in graphene. We show that the low density of states at the Dirac point, and the anomalous broadening of the adatom electronic level, lead to the formation of magnetic moments for arbitrarily small local charging energy. As a result, we obtain an anomalous scaling of the boundary separating magnetic and nonmagnetic states. We show that, unlike any other material, the formation of magnetic moments can be controlled by an electric field effect.

Bruno Uchoa; Valeri N. Kotov; N. M. R. Peres; A. H. Castro Neto

2008-07-11T23:59:59.000Z

191

Modern Magnetism  

Science Journals Connector (OSTI)

... BATES‘S "Modern Magnetism", first published in 1939, is widely appreciated as a general survey in which ... grateful to the author for collecting together so much interesting information about recent work in magnetism. ...

E. C. S.

1948-06-05T23:59:59.000Z

192

Velocity damper for electromagnetically levitated materials  

DOE Patents (OSTI)

A system for damping oscillatory and spinning motions induced in an electromagnetically levitated material is disclosed. Two opposed field magnets are located orthogonally to the existing levitation coils for providing a DC quadrupole field (cusp field) around the material. The material used for generating the DC quadrupole field must be nonconducting to avoid eddy-current heating and of low magnetic permeability to avoid distorting the induction fields providing the levitation. 1 fig.

Fox, R.J.

1994-06-07T23:59:59.000Z

193

Disorder-Induced Microscopic Magnetic Memory  

NLE Websites -- All DOE Office Websites (Extended Search)

Disorder-Induced Microscopic Magnetic Memory Print Disorder-Induced Microscopic Magnetic Memory Print The magnetic-recording industry deliberately introduces carefully controlled disorder into its materials to obtain the desired magnetic properties. But as the density of magnetic disks climbs, the size of the magnetic domains responsible for storage must decrease, posing new challenges. Beautiful theories based on random microscopic disorder have been developed over the past ten years. To directly compare these theories with precise experiments, an American-European team, led by researchers from the University of Washington, Seattle, first developed and then applied coherent x-ray speckle metrology to microscopic magnetic domains in a series of thin multilayer perpendicular magnetic materials of varying disorder. Their results, at odds with all previous theories, have set a new reference point for future theories.

194

Disorder-Induced Microscopic Magnetic Memory  

NLE Websites -- All DOE Office Websites (Extended Search)

Disorder-Induced Microscopic Disorder-Induced Microscopic Magnetic Memory Disorder-Induced Microscopic Magnetic Memory Print Wednesday, 26 October 2005 00:00 The magnetic-recording industry deliberately introduces carefully controlled disorder into its materials to obtain the desired magnetic properties. But as the density of magnetic disks climbs, the size of the magnetic domains responsible for storage must decrease, posing new challenges. Beautiful theories based on random microscopic disorder have been developed over the past ten years. To directly compare these theories with precise experiments, an American-European team, led by researchers from the University of Washington, Seattle, first developed and then applied coherent x-ray speckle metrology to microscopic magnetic domains in a series of thin multilayer perpendicular magnetic materials of varying disorder. Their results, at odds with all previous theories, have set a new reference point for future theories.

195

Disorder-Induced Microscopic Magnetic Memory  

NLE Websites -- All DOE Office Websites (Extended Search)

Disorder-Induced Microscopic Magnetic Memory Print Disorder-Induced Microscopic Magnetic Memory Print The magnetic-recording industry deliberately introduces carefully controlled disorder into its materials to obtain the desired magnetic properties. But as the density of magnetic disks climbs, the size of the magnetic domains responsible for storage must decrease, posing new challenges. Beautiful theories based on random microscopic disorder have been developed over the past ten years. To directly compare these theories with precise experiments, an American-European team, led by researchers from the University of Washington, Seattle, first developed and then applied coherent x-ray speckle metrology to microscopic magnetic domains in a series of thin multilayer perpendicular magnetic materials of varying disorder. Their results, at odds with all previous theories, have set a new reference point for future theories.

196

Bipolar pulse field for magnetic refrigeration  

DOE Patents (OSTI)

A magnetic refrigeration apparatus includes first and second steady state magnets, each having a field of substantially equal strength and opposite polarity, first and second bodies made of magnetocaloric material disposed respectively in the influence of the fields of the first and second steady state magnets, and a pulsed magnet, concentric with the first and second steady state magnets, and having a field which cycles between the fields of the first and second steady state magnets, thereby cyclically magnetizing and demagnetizing and thus heating and cooling the first and second bodies. Heat exchange apparatus of suitable design can be used to expose a working fluid to the first and second bodies of magnetocaloric material. A controller is provided to synchronize the flow of working fluid with the changing states of magnetization of the first and second bodies. 2 figs.

Lubell, M.S.

1994-10-25T23:59:59.000Z

197

Migratory magnetism  

Science Journals Connector (OSTI)

... in tune with the Earth's magnetic field. But how, exactly, do creatures sense magnetism? This is one of the most intriguing questions in modern biology - and also ... move preferentially in a north-south direction. This finding hints at the possible influence of magnetism on their movements. ...

Henry Gee

1999-10-06T23:59:59.000Z

198

Materials science: The pull of stronger magnets  

Science Journals Connector (OSTI)

... in the 1990s. The limit has hampered efforts to make high-tech products such as electric cars more efficient. And in the past two years, the cost of the rare-earth ... . And many devices that are part of the green economy require substantial amounts: an electric car carries a few kilograms of rare-earth elements, and a 3-megawatt wind turbine ...

Nicola Jones

2011-04-06T23:59:59.000Z

199

A study of magnetically annealed ferromagnetic materials  

E-Print Network (OSTI)

are face centered cubics like the crystals of the mineral spinel. This is why they are called ferrospinels. The spinel structure of a ferromagnetic can be formed with several metallic cations as long as these cations are smaller than the oxygen anion.... These are called hexagonal ferrites such as BaO. 6Fe 0 and P 0. 6Fe 0 There are two possible distributions of the metallic cations with respect to the oxygen ions. The normal spinel crystal structure occurs when all the divalent ions are in the tetrahedral...

Ramos, Domingo

2012-06-07T23:59:59.000Z

200

Non-Rare Earth magnetic materials  

Energy.gov (U.S. Department of Energy (DOE))

2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer Evaluation

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


201

Magnetic spectroscopy and microscopy of functional materials  

E-Print Network (OSTI)

apparatus employed to expose UHV-clean surfaces for poly- orMn 0.6 Si ?lms fabricated by UHV sputtering [51]. However,In an ultra-high vacuum (UHV) chamber with good base

Jenkins, C.A.

2012-01-01T23:59:59.000Z

202

Linear Collider Final Focus Magnet Construction | Superconducting Magnet  

NLE Websites -- All DOE Office Websites (Extended Search)

Linear Collider Final Focus Magnet Construction Linear Collider Final Focus Magnet Construction The final focus magnets for the International Linear Collider require very small quadrupoles be placed within the detector background field for both the entrance and exit beams. The use of superconducting magnets for this function provide solutions to several problems confronting the machine designers. One constraint is the operation within the 3 tesla detector field. The direct wind magnets are capable of operation without the use of magnetic materials in their construction, making them ideal for compact focussing solutions within detectors. The second constraint is the small physical size dictated by the crossing angle of the beams and proximity to the IR within the detector solenoid. The Direct Wind design does not require a collar to withstand Lorentz

203

Design improvements of a permanent magnet active magnetic refrigerator  

Science Journals Connector (OSTI)

Abstract A second-generation room-temperature permanent magnet active magnetic regenerator test apparatus using Halbach arrays is described. The magnet arrays consist of three concentric cylinders. Each cylinder is constructed using 12 permanent magnet segments. The inner magnet array is stationary while the intermediate and outer arrays are designed to rotate in opposite directions so as to create a sinusoidal magnetic field waveform with a stationary field direction. The fluid flow system utilizes a novel check valve configuration so that fluid dead volumes are minimized. The system construction is modular to allow for quick replacement of material or system components. Fringing fields near the outer and inner diameters of the arrays are found to create large forces between arrays leading to large torques. Test results using 650 g of gadolinium spheres produce a no-load temperature span of 33 K at 0.8 Hz.

D.S. Arnold; A. Tura; A. Ruebsaat-Trott; A. Rowe

2014-01-01T23:59:59.000Z

204

Large Magnetization at Carbon Surfaces  

NLE Websites -- All DOE Office Websites (Extended Search)

Large Magnetization at Carbon Large Magnetization at Carbon Surfaces Large Magnetization at Carbon Surfaces Print Wednesday, 31 August 2011 00:00 From organic matter to pencil lead, carbon is a versatile element. Now, another use has been found: magnets. One would not expect pure carbon to be magnetic, but for more than ten years scientists have suspected that carbon can be made to be magnetic by doping it with nonmagnetic materials, changing its order ever so slightly. Years ago, the first x-ray images obtained using the scanning transmission x-ray microscope at ALS Beamline 11.0.2 provided valuable insight into how proton irradiation can cause carbon to transform into a ferromagnetic material. Now, researchers are using x-ray spectroscopy at ALS Beamline 4.0.2 to study the magnetism of proton-irradiated graphite surfaces in order to understand the effects of hydrogen (i.e. protons) on the electronic structure of carbon. In studying the properties of electrons responsible for magnetic order in graphite, researchers found that a very large magnetic moment is essentially switched on when hydrogen atoms are incorporated at the surface of graphite.

205

Magnetic Testing of Bonded Magnets  

Science Journals Connector (OSTI)

Many techniques exist to characterize the magnetic properties of bonded magnets. We will review the common and not so common techniques in use, with emphasis on the advantages and disadvantages of each one, an...

S. R. Trout

2003-01-01T23:59:59.000Z

206

Vortex Dynamics in NanoScale Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Into the Vortex: Dynamics in Nanoscale Materials Into the Vortex: Dynamics in Nanoscale Materials Micron and nanosized magnets are of great interest for their potential applications in new electronic devices, such as magnetic random access memories. As the size of magnets is reduced to a 1-micron scale and below, the boundaries (surfaces, perimeters, etc) of the objects begin to profoundly influence both the static and dynamic behavior of the materials. Researchers from Argonne's Materials Science Division (MSD), Center for Nanoscale Materials (CNM), and Advanced Photon Source (APS) have recently examined the dynamics of 3- to 7-micron-diameter NiFe alloy disks with a combination of theoretical calculations and a new time-resolved magnetic imaging technique using synchrotron-based x-ray photoemission electron

207

Lesson Summary Students will learn about the magnetic fields of  

E-Print Network (OSTI)

Knowledge & Skills Understanding of: · Magnetic field lines · Magnetic field strength decreases class period Materials per student · NASA STERO mission story · Diagrams of the magnetic field linesLesson Summary Students will learn about the magnetic fields of the Sun and Earth. This activity

Mojzsis, Stephen J.

208

Combinatorial synthesis of novel materials  

DOE Patents (OSTI)

Methods and apparatus for the preparation and use of a substrate having an array of diverse materials in predefined regions thereon. A substrate having an array of diverse materials thereon is generally prepared by delivering components of materials to predefined regions on a substrate, and simultaneously reacting the components to form at least two materials. Materials which can be prepared using the methods and apparatus of the present invention include, for example, covalent network solids, ionic solids and molecular solids. More particularly, materials which can be prepared using the methods and apparatus of the present invention include, for example, inorganic materials, intermetallic materials, metal alloys, ceramic materials, organic materials, organometallic materials, non-biological organic polymers, composite materials (e.g., inorganic composites, organic composites, or combinations thereof), etc. Once prepared, these materials can be screened for useful properties including, for example, electrical, thermal, mechanical, morphological, optical, magnetic, chemical, or other properties. Thus, the present invention provides methods for the parallel synthesis and analysis of novel materials having useful properties.

Schultz, Peter G. (Oakland, CA); Xiang, Xiaodong (Alameda, CA); Goldwasser, Isy (Menlo Park, CA)

2001-01-01T23:59:59.000Z

209

Combinatorial synthesis of novel materials  

DOE Patents (OSTI)

Methods and apparatus for the preparation and use of a substrate having an array of diverse materials in predefined regions thereon. A substrate having an array of diverse materials thereon is generally prepared by delivering components of materials to predefined regions on a substrate, and simultaneously reacting the components to form at least two materials. Materials which can be prepared using the methods and apparatus of the present invention include, for example, covalent network solids, ionic solids and molecular solids. More particularly, materials which can be prepared using the methods and apparatus of the present invention include, for example, inorganic materials, intermetallic materials, metal alloys, ceramic materials, organic materials, organometallic materials, non-biological organic polymers, composite materials (e.g., inorganic composites, organic composites, or combinations thereof), etc. Once prepared, these materials can be screened for useful properties including, for example, electrical, thermal, mechanical, morphological, optical, magnetic, chemical, or other properties. Thus, the present invention provides methods for the parallel synthesis and analysis of novel materials having useful properties.

Schultz, Peter G. (Oakland, CA); Xiang, Xiaodong (Alameda, CA); Goldwasser, Isy (Alameda, CA)

2002-02-12T23:59:59.000Z

210

Combinatorial synthesis of novel materials  

DOE Patents (OSTI)

Methods and apparatus for the preparation and use of a substrate having an array of diverse materials in predefined regions thereon. A substrate having an array of diverse materials thereon is generally prepared by delivering components of materials to predefined regions on a substrate, and simultaneously reacting the components to form at least two materials. Materials which can be prepared using the methods and apparatus of the present invention include, for example, covalent network solids, ionic solids and molecular solids. More particularly, materials which can be prepared using the methods and apparatus of the present invention include, for example, inorganic materials, intermetallic materials, metal alloys, ceramic materials, organic materials, organometallic materials, non-biological organic polymers, composite materials (e.g., inorganic composites, organic composites, or combinations thereof), etc. Once prepared, these materials can be screened for useful properties including, for example, electrical, thermal, mechanical, morphological, optical, magnetic, chemical, or other properties. Thus, the present invention provides methods for the parallel synthesis and analysis of novel materials having useful properties.

Schultz, Peter G. (Oakland, CA); Xiang, Xiaodong (Alameda, CA); Goldwasser, Isy (Menlo Park, CA)

1999-12-21T23:59:59.000Z

211

Combinatorial sythesis of organometallic materials  

DOE Patents (OSTI)

Methods and apparatus for the preparation and use of a substrate having an array of diverse materials in predefined regions thereon. A substrate having an array of diverse materials thereon is generally prepared by delivering components of materials to predefined regions on a substrate, and simultaneously reacting the components to form at least two materials. Materials which can be prepared using the methods and apparatus of the present invention include, for example, covalent network solids, ionic solids and molecular solids. More particularly, materials which can be prepared using the methods and apparatus of the present invention include, for example, inorganic materials, intermetallic materials, metal alloys, ceramic materials, organic materials, organometallic materials, non-biological organic polymers, composite materials (e.g., inorganic composites, organic composites, or combinations thereof), etc. Once prepared, these materials can be screened for useful properties including, for example, electrical, thermal, mechanical, morphological, optical, magnetic, chemical, or other properties. Thus, the present invention provides methods for the parallel synthesis and analysis of novel materials having useful properties.

Schultz, Peter G. (Oakland, CA); Xiang, Xiaodong (Alameda, CA); Goldwasser, Isy (Alameda, CA)

2002-07-16T23:59:59.000Z

212

Effect of oxygen concentration on the magnetic properties of La2CoMnO6 Center for Materials for Information Technology and Department of Chemistry, University of Alabama,  

E-Print Network (OSTI)

Effect of oxygen concentration on the magnetic properties of La2CoMnO6 thin films H. Z. Guo Center; published online 16 November 2007 The dependence of the magnetic properties on oxygen concentration the oxygen background pressure during growth using pulsed laser deposition. Two distinct ferromagnetic FM

Pennycook, Steve

213

Annealing effects on magnetic properties of silicone-coated iron-based soft magnetic composites  

E-Print Network (OSTI)

Annealing effects on magnetic properties of silicone-coated iron-based soft magnetic composites , Alex A. Volinsky b a School of Material Science and Engineering, University of Science and Technology Available online 1 October 2011 Keywords: Silicone resin Soft magnetic composites Annealing treatment

Volinsky, Alex A.

214

Materializing energy  

Science Journals Connector (OSTI)

Motivated and informed by perspectives on sustainability and design, this paper draws on a diverse body of scholarly works related to energy and materiality to articulate a perspective on energy-as-materiality and propose a design approach of ... Keywords: design, design theory, energy, materiality, sustainability

James Pierce; Eric Paulos

2010-08-01T23:59:59.000Z

215

Large Magnetization at Carbon Surfaces  

NLE Websites -- All DOE Office Websites (Extended Search)

Large Magnetization at Carbon Surfaces Print Large Magnetization at Carbon Surfaces Print From organic matter to pencil lead, carbon is a versatile element. Now, another use has been found: magnets. One would not expect pure carbon to be magnetic, but for more than ten years scientists have suspected that carbon can be made to be magnetic by doping it with nonmagnetic materials, changing its order ever so slightly. Years ago, the first x-ray images obtained using the scanning transmission x-ray microscope at ALS Beamline 11.0.2 provided valuable insight into how proton irradiation can cause carbon to transform into a ferromagnetic material. Now, researchers are using x-ray spectroscopy at ALS Beamline 4.0.2 to study the magnetism of proton-irradiated graphite surfaces in order to understand the effects of hydrogen (i.e. protons) on the electronic structure of carbon. In studying the properties of electrons responsible for magnetic order in graphite, researchers found that a very large magnetic moment is essentially switched on when hydrogen atoms are incorporated at the surface of graphite.

216

Large Magnetization at Carbon Surfaces  

NLE Websites -- All DOE Office Websites (Extended Search)

Large Magnetization at Carbon Surfaces Print Large Magnetization at Carbon Surfaces Print From organic matter to pencil lead, carbon is a versatile element. Now, another use has been found: magnets. One would not expect pure carbon to be magnetic, but for more than ten years scientists have suspected that carbon can be made to be magnetic by doping it with nonmagnetic materials, changing its order ever so slightly. Years ago, the first x-ray images obtained using the scanning transmission x-ray microscope at ALS Beamline 11.0.2 provided valuable insight into how proton irradiation can cause carbon to transform into a ferromagnetic material. Now, researchers are using x-ray spectroscopy at ALS Beamline 4.0.2 to study the magnetism of proton-irradiated graphite surfaces in order to understand the effects of hydrogen (i.e. protons) on the electronic structure of carbon. In studying the properties of electrons responsible for magnetic order in graphite, researchers found that a very large magnetic moment is essentially switched on when hydrogen atoms are incorporated at the surface of graphite.

217

Large Magnetization at Carbon Surfaces  

NLE Websites -- All DOE Office Websites (Extended Search)

Large Magnetization at Carbon Surfaces Print Large Magnetization at Carbon Surfaces Print From organic matter to pencil lead, carbon is a versatile element. Now, another use has been found: magnets. One would not expect pure carbon to be magnetic, but for more than ten years scientists have suspected that carbon can be made to be magnetic by doping it with nonmagnetic materials, changing its order ever so slightly. Years ago, the first x-ray images obtained using the scanning transmission x-ray microscope at ALS Beamline 11.0.2 provided valuable insight into how proton irradiation can cause carbon to transform into a ferromagnetic material. Now, researchers are using x-ray spectroscopy at ALS Beamline 4.0.2 to study the magnetism of proton-irradiated graphite surfaces in order to understand the effects of hydrogen (i.e. protons) on the electronic structure of carbon. In studying the properties of electrons responsible for magnetic order in graphite, researchers found that a very large magnetic moment is essentially switched on when hydrogen atoms are incorporated at the surface of graphite.

218

Large Magnetization at Carbon Surfaces  

NLE Websites -- All DOE Office Websites (Extended Search)

Large Magnetization at Carbon Surfaces Print Large Magnetization at Carbon Surfaces Print From organic matter to pencil lead, carbon is a versatile element. Now, another use has been found: magnets. One would not expect pure carbon to be magnetic, but for more than ten years scientists have suspected that carbon can be made to be magnetic by doping it with nonmagnetic materials, changing its order ever so slightly. Years ago, the first x-ray images obtained using the scanning transmission x-ray microscope at ALS Beamline 11.0.2 provided valuable insight into how proton irradiation can cause carbon to transform into a ferromagnetic material. Now, researchers are using x-ray spectroscopy at ALS Beamline 4.0.2 to study the magnetism of proton-irradiated graphite surfaces in order to understand the effects of hydrogen (i.e. protons) on the electronic structure of carbon. In studying the properties of electrons responsible for magnetic order in graphite, researchers found that a very large magnetic moment is essentially switched on when hydrogen atoms are incorporated at the surface of graphite.

219

Magnetic neutron scattering (invited)  

Science Journals Connector (OSTI)

The application of neutron scattering techniques to magnetic problems is reviewed. We will first discuss diffraction techniques used to solve magnetic structures as well as to measure magnetic form factors order parameters critical phenomena and the scattering from low?dimensional systems. We will also discuss inelastic scattering techniques including polarized beam methods utilized to determine the spin dynamics of various materials. Information will be provided about the types of spectrometers available at the user?oriented national facilities located at Argonne National Laboratory Brookhaven National Laboratory Los Alamos National Laboratory The National Institute of Standards and Technology and Oak Ridge National Laboratory as well as the spectrometers at the Missouri University Research Reactor.

J. W. Lynn

1994-01-01T23:59:59.000Z

220

Magnetic anisotropy in Fe-25Cr-12Co-1Si alloy induced by external magnetic field  

E-Print Network (OSTI)

Magnetic anisotropy in Fe-25Cr-12Co-1Si alloy induced by external magnetic field ZHEN Liang( )1 of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China; 2. Department. Curriculum in Applied and Materials Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC

Qin, Lu-Chang

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


221

Strange Magnetism  

E-Print Network (OSTI)

We present an analytic and parameter-free expression for the momentum dependence of the strange magnetic form factor of the nucleon and its corresponding radius which has been derived in Heavy Baryon Chiral Perturbation Theory. We also discuss a model-independent relation between the isoscalar magnetic and the strange magnetic form factors of the nucleon based on chiral symmetry and SU(3) only. These limites are used to derive bounds on the strange magnetic moment of the proton from the recent measurement by the SAMPLE collaboration.

Thomas R. Hemmert; Ulf-G. Meissner; Sven Steininger

1998-11-09T23:59:59.000Z

222

Optical Magnetism  

Science Journals Connector (OSTI)

Magnetic dipole radiation one fourth as intense as electric dipole radiation, as well as a novel nonlinear magneto-optical effect are reported in dielectric media.

Oliveira, Samuel L; Rand, Stephen C

223

Magnetic Field Safety Magnetic Field Safety  

E-Print Network (OSTI)

Magnetic Field Safety Training #12;Magnetic Field Safety Strong Magnetic Fields exist around energized magnets. High magnetic fields alone are a recognized hazard only for personnel with certain medical conditions such as pacemakers, magnetic implants, or embedded shrapnel. In addition, high magnetic

McQuade, D. Tyler

224

Magnetic Field Safety Training  

NLE Websites -- All DOE Office Websites (Extended Search)

Safety Training Magnetic Field Safety Strong Magnetic Fields exist around energized magnets. High magnetic fields alone are a recognized hazard only for personnel with certain...

225

Geometric accuracy of 3D coordinates of the Leksell stereotactic skull frame in 1.5 Tesla- and 3.0 Tesla-magnetic resonance imaging: a comparison of three different fixation screw materials  

Science Journals Connector (OSTI)

......In addition, spatial accuracy over the entire brain is necessary when multiple metastatic brain tumors are being treated. Regarding image distortion...magnetic resonance imaging for postimplantation deep brain stimulator lead localization. Neurosurgery......

Hisato Nakazawa; Yoshimasa Mori; Osamu Yamamuro; Masataka Komori; Yuta Shibamoto; Yukio Uchiyama; Takahiko Tsugawa; Masahiro Hagiwara

2014-11-01T23:59:59.000Z

226

New Model for Amorphous Magnetism  

Science Journals Connector (OSTI)

We propose a new model for magnetism in an amorphous material. The model is particularly appropriate for rare-earth compounds such as TbF2. It is a Heisenberg model in which each ionic spin is subjected to a local anisotropy field of random orientation. We discuss the magnetic properties of two simple ionic configurations, and show that the model is in qualitative agreement with the experimental data.

R. Harris; M. Plischke; M. J. Zuckermann

1973-07-16T23:59:59.000Z

227

Magnetic Quantum Oscillations in SrFe2As2 2009 NHMFL Science Highlight for NSF  

E-Print Network (OSTI)

Magnetic Quantum Oscillations in SrFe2As2 2009 NHMFL Science Highlight for NSF DMR-Award 0654118 at Los Alamos (through a collaboration with the material science group, MPA-10). Magnetic quantum materials by measuring the Fermi surface of the parent magnetic state. Examples of the magnetic quantum

Weston, Ken

228

Magnetic insulation  

Science Journals Connector (OSTI)

... by Winterberg1, led me to look into the background of the idea of 'magnetic insulation'. The purpose of this letter is to point out that the scheme described in ... were presented earlier in a longer article2. In that article he suggested that 'magnetic insulation' might make possible a transformer for 109 V. A year later the same objections ...

JOHN P. BLEWETT

1974-06-28T23:59:59.000Z

229

Magnetism1  

Science Journals Connector (OSTI)

... is reached, the rate of diminution becomes very rapid indeed, until, finally, the magnetism of the iron disappears at the same time as for small forces. Instead of ... a lower maximum, and its rise is less rapid. The critical temperature at which magnetism disappears changes rapidly with the composition of the steel. For very soft charcoal iron ...

1890-01-23T23:59:59.000Z

230

Magnetism Group  

Science Journals Connector (OSTI)

... of the Institute of Physics and the Physical Society has announced the establishment of a Magnetism Group. The aim of the new Group is to further interest in ... Group. The aim of the new Group is to further interest in magnetism by holding regular discussion meetings and in other ways. It is intended that these ...

1965-09-04T23:59:59.000Z

231

Terrestrial Magnetism*  

Science Journals Connector (OSTI)

... A similar investigation of the effect of the moon's action on terrestrial magnetism requires a series of observations made at much less distant intervals than the monthly ones ... heat, from the central body of our system, or merely having its own inherent magnetism modified by solar action, then we must choose as our unit the lunation, or ...

1873-01-09T23:59:59.000Z

232

Terrestrial Magnetism*  

Science Journals Connector (OSTI)

... IN bringing before you this evening, gentlemen, the subject of terrestrial magnetism, it is not my intention to attempt to present you with an exhaustive paper ... clearly as I am able, what is the actual condition of our knowledge respecting the magnetism of the globe, and what the nature of its complex variations, without, however, ...

1873-01-02T23:59:59.000Z

233

Terrestrial Magnetism  

Science Journals Connector (OSTI)

... THE present activity of the department of terrestrial magnetism of the Carnegie Institution of Washington and the largeness of its future aims are alike ... a “progress report” which he contributes to the latest (March) number of Terrestrial Magnetism. The department, which has lately entered on its eleventh year, has under construetion ...

C. CHREE

1914-07-23T23:59:59.000Z

234

Remanent Magnetism  

Science Journals Connector (OSTI)

... STUDY of the natural remanent magnetism of rocks is becoming a familiar method for determining the direction of the Earth's ... the geomagnetic poles or of the continents themselves. An alternative use for measurements of remanent magnetism, namely, the determination of the temperature of formation of pyroclastic deposits, is described ...

1958-03-22T23:59:59.000Z

235

Scintillator material  

DOE Patents (OSTI)

An improved scintillator material comprising cerium fluoride is disclosed. Cerium fluoride has been found to provide a balance of good stopping power, high light yield and short decay constant that is superior to known scintillator materials such as thallium-doped sodium iodide, barium fluoride and bismuth germanate. As a result, cerium fluoride is favorably suited for use as a scintillator material in positron emission tomography.

Anderson, David F. (Batavia, IL); Kross, Brian J. (Aurora, IL)

1992-01-01T23:59:59.000Z

236

Scintillator material  

DOE Patents (OSTI)

An improved scintillator material comprising cerium fluoride is disclosed. Cerium fluoride has been found to provide a balance of good stopping power, high light yield and short decay constant that is superior to known scintillator materials such as thallium-doped sodium iodide, barium fluoride and bismuth germanate. As a result, cerium fluoride is favorably suited for use as a scintillator material in positron emission tomography. 4 figs.

Anderson, D.F.; Kross, B.J.

1994-06-07T23:59:59.000Z

237

Scintillator material  

DOE Patents (OSTI)

An improved scintillator material comprising cerium fluoride is disclosed. Cerium fluoride has been found to provide a balance of good stopping power, high light yield and short decay constant that is superior to known scintillator materials such as thallium-doped sodium iodide, barium fluoride and bismuth germanate. As a result, cerium fluoride is favorably suited for use as a scintillator material in positron emission tomography. 4 figs.

Anderson, D.F.; Kross, B.J.

1992-07-28T23:59:59.000Z

238

Scintillator material  

DOE Patents (OSTI)

An improved scintillator material comprising cerium fluoride is disclosed. Cerium fluoride has been found to provide a balance of good stopping power, high light yield and short decay constant that is superior to known scintillator materials such as thallium-doped sodium iodide, barium fluoride and bismuth germanate. As a result, cerium fluoride is favorably suited for use as a scintillator material in positron emission tomography.

Anderson, David F. (Batavia, IL); Kross, Brian J. (Aurora, IL)

1994-01-01T23:59:59.000Z

239

Advanced Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Advanced Materials Advanced Materials Advanced Materials Express Licensing Active Terahertz Metamaterial Devices Express Licensing Anion-Conducting Polymer, Composition, And Membrane Express Licensing Analysis Of Macromolecule, Liggands And Macromolecule-Lingand Complexes Express Licensing Carbon Microtubes Express Licensing Chemical Synthesis Of Chiral Conducting Polymers Express Licensing Forming Adherent Coatings Using Plasma Processing Express Licensing Hydrogen Scavengers Express Licensing Laser Welding Of Fused Quartz Express Licensing Multiple Feed Powder Splitter Negotiable Licensing Boron-10 Neutron Detectors for Helium-3 Replacement Negotiable Licensing Insensitive Extrudable Explosive Negotiable Licensing Durable Fuel Cell Membrane Electrode Assembly (MEA) Express Licensing Method of Synthesis of Proton Conducting Materials

240

Critical Materials:  

Office of Environmental Management (EM)

lighting. 14 (bottom) Criticality ratings of shortlisted raw 76 materials. 15 77 2. Technology Assessment and Potential 78 This section reviews the major trends within...

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


241

Superconducting Magnets  

NLE Websites -- All DOE Office Websites (Extended Search)

Mit Hilfe der Technologie supraleitender Magnete lassen sich in Mit Hilfe der Technologie supraleitender Magnete lassen sich in Ringbeschleunigern höhere Energien erreichen. Weil supraleitende Spulen keinen elektrischen Widerstand aufweisen, können damit stärkere Magnetfelder erzeugt werden. In normal leitenden Elektromagneten wird - wegen des elektrischen Widerstands der Drähte - die Spule aufgeheizt. Auf diese Weise geht sehr viel Energie in Form von Wärme verloren, was die Energiekosten dieser Magnete in die Höhe treibt. Supraleitende Spulen erlauben es, Magnete grosser Feldstärke unter günstigen Bedingungen zu betreiben und damit die Energiekosten zu senken. Durch den Einbau supraleitender Spulen in den Ringbeschleuniger von Fermilab konnte dessen Energie verdoppelt werden.Auch der im Bau befindliche "Large Hadron Collider" am CERN wird supraleitende Magnete

242

Magnetic nanotubes  

DOE Patents (OSTI)

A magnetic nanotube includes bacterial magnetic nanocrystals contacted onto a nanotube which absorbs the nanocrystals. The nanocrystals are contacted on at least one surface of the nanotube. A method of fabricating a magnetic nanotube includes synthesizing the bacterial magnetic nanocrystals, which have an outer layer of proteins. A nanotube provided is capable of absorbing the nanocrystals and contacting the nanotube with the nanocrystals. The nanotube is preferably a peptide bolaamphiphile. A nanotube solution and a nanocrystal solution including a buffer and a concentration of nanocrystals are mixed. The concentration of nanocrystals is optimized, resulting in a nanocrystal to nanotube ratio for which bacterial magnetic nanocrystals are immobilized on at least one surface of the nanotubes. The ratio controls whether the nanocrystals bind only to the interior or to the exterior surfaces of the nanotubes. Uses include cell manipulation and separation, biological assay, enzyme recovery, and biosensors.

Matsui, Hiroshi (Glen Rock, NJ); Matsunaga, Tadashi (Tokyo, JP)

2010-11-16T23:59:59.000Z

243

Modeling of magnetostrictive materials and structures  

SciTech Connect

The constitutive model for a magnetostrictive material and its effect on the structural response is presented in this article. The example of magnetostrictive material considered is the TERFENOL-D. As like the piezoelectric material, this material has two constitutive laws, one of which is the sensing law and the other is the actuation law, both of which are highly coupled and non-linear. For the purpose of analysis, the constitutive laws can be characterized as coupled or uncoupled and linear or non linear. Coupled model is studied without assuming any explicit direct relationship with magnetic field. In the linear coupled model, which is assumed to preserve the magnetic flux line continuity, the elastic modulus, the permeability and magnetoelastic constant are assumed as constant. In the nonlinear-coupled model, the nonlinearity is decoupled and solved separately for the magnetic domain and the mechanical domain using two nonlinear curves, namely the stress vs. strain curve and the magnetic flux density vs. magnetic field curve. This is performed by two different methods. In the first, the magnetic flux density is computed iteratively, while in the second, the artificial neural network is used, where in the trained network will give the necessary strain and magnetic flux density for a given magnetic field and stress level. The effect of nonlinearity is demonstrated on a simple magnetostrictive rod.

Gopalakrishnan, S. [Department of Aerospace Engineering Indian Institute of Science Bangalore 560 012 (India)

2008-07-29T23:59:59.000Z

244

Reversal of patterned Co/Pd multilayers with graded magnetic anisotropy  

E-Print Network (OSTI)

Magnetic Materials Group, Metallurgy Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA Center for Nanoscale Science

2011-01-01T23:59:59.000Z

245

Ramesh Gupta | Superconducting Magnet Division  

NLE Websites -- All DOE Office Websites (Extended Search)

Ramesh Gupta Ramesh Gupta Ramesh Gupta has always been a leader in the world of superconducting magnets, which are essential to great modern accelerators such as the Relativistic Heavy Ion Collider at BNL, and the Large Hadron Collider at CERN, Switzerland. For the past decade, Lab researchers have been exploring the use of new materials that become superconducting at higher temperatures. Gupta, head of the High Temperature Superconductor (HTS) Research and Development Group in the Superconducting Magnet Division, is among those exploring avenues for HTS magnets that are energy efficient and have magnetic fields that are a million times stronger than the Earth's. These new magnets could revolutionize use in future accelerators, play a key role in energy efficiency and storage, and make possible new

246

Materials for Advanced Energy Technologies  

Science Journals Connector (OSTI)

...sources such as sunlight or wind become more at-tractive with...are: magnetic confinement, laser fusion, and electron beam fusion...working tem-perature of the turbine blade 10 C per year, but for...High-Tem-perature Materials in Gas Turbines (Elsevier, Am-sterdam...

Richard S. Claassen

1976-02-20T23:59:59.000Z

247

Department of Advanced Materials Science  

E-Print Network (OSTI)

device, Bioconjugate matsuura@k.u-tokyo.ac.jpe-mail 04-7136-3781T E L Environmental-friendly materials Nuclear magnetic resonance, Quantum spin systems, Low temperature physics, Strongly correlated electron Effect takatama@spring8.or.jpe-mail 0791-58-2942T E L Synchrotron Radiation, X-ray Free Electron Laser

Katsumoto, Shingo

248

Magnetic Structure Determination from Neutron Diffraction Data  

NLE Websites -- All DOE Office Websites (Extended Search)

logo logo Magnetic Structure Determination from Neutron Diffraction Data September 17 - 20, 2012 logo Oak Ridge National Laboratory - Oak Ridge, Tennessee, USA About the Workshop Program Lecture Notes Useful Links Organizers Travel & Lodging Wireless Networking Photos filler About the Workshop molecule The Magnetic Structure Determination Workshop 2012 concluded on September 20. The aim of this workshop was to enhance the community studying magnetism in materials by learning from experts the essential theoretical foundations to magnetic representation analysis and work through real examples to gain experience in solving and refining magnetic structures from neutron powder and single crystal diffraction data. Invited speakers: Juan Rodríguez-Carvajal (ILL, Grenoble)

249

High magnetic field processing of liquid crystalline polymers  

DOE Patents (OSTI)

A process of forming bulk articles of oriented liquid crystalline thermoset material, the material characterized as having an enhanced tensile modulus parallel to orientation of an applied magnetic field of at least 25 percent greater than said material processed in the absence of a magnetic field, by curing a liquid crystalline thermoset precursor within a high strength magnetic field of greater than about 2 Tesla, is provided, together with a resultant bulk article of a liquid crystalline thermoset material, said material processed in a high strength magnetic field whereby said material is characterized as having a tensile modulus parallel to orientation of said field of at least 25 percent greater than said material processed in the absence of a magnetic field.

Smith, M.E.; Benicewicz, B.C.; Douglas, E.P.

1998-11-24T23:59:59.000Z

250

Fabrication of thin films for a small alternating gradient field magnetometer for biomedical magnetic sensing applications  

E-Print Network (OSTI)

. This is due to the addition of Cr, which decreases the magnetic moment of the films; magnetoelas- tic coupling magnetometers (AGFM) composed of permanent magnets are being developed for measuring magnetic moments in soil Si membrane with a cylindrical SmCo permanent magnet.2,3 The magnetic material attached

McHenry, Michael E.

251

OBSERVATIONAL CONSEQUENCES OF A MAGNETIC FLUX ROPE EMERGING INTO THE CORONA S. E. Gibson,1  

E-Print Network (OSTI)

of magnetic field lines that collectively wind about a central, axial field line. Such a magnetic We show that a numerical simulation of a magnetic flux rope emerging into a coronal magnetic field headinggs: MHD -- Sun: corona -- Sun: coronal mass ejections (CMEs) -- Sun: magnetic fields Online material

Demoulin, Pascal

252

Linear chain magnetism  

Science Journals Connector (OSTI)

Linear chain magnetism ... A brief introduction to this concept, which is also called lower dimensional magnetism. ...

Richard L. Carlin

1991-01-01T23:59:59.000Z

253

MagLab - Pioneers in Electricity and Magnetism: Walther Meissner  

NLE Websites -- All DOE Office Websites (Extended Search)

Meissner and Robert Ochsenfeld began their work with superconducting materials and magnetism. In the course of their investigations, the pair discovered that superconductors...

254

National High Magnetic Field Laboratory: Museum of Electricity...  

NLE Websites -- All DOE Office Websites (Extended Search)

Car batteries contain from 60 to 80 percent recycled materials. Related Electricity & Magnetism Pages Interactive Java Tutorials: Daniell Cell Interactive Java Tutorials: Simple...

255

Saturable inductor and transformer structures for magnetic pulse compression  

DOE Patents (OSTI)

Saturable inductor and transformer for magnetic compression of an electronic pulse, using a continuous electrical conductor looped several times around a tightly packed core of saturable inductor material.

Birx, Daniel L. (Londonderry, NH); Reginato, Louis L. (Orinda, CA)

1990-01-01T23:59:59.000Z

256

Methods and apparatus for altering material using ion beams  

DOE Patents (OSTI)

A method and apparatus for treating material surfaces using a repetitively pulsed ion beam. In particular, a method of treating magnetic material surfaces in order to reduce surface defects, and produce amorphous fine grained magnetic material with properties that can be tailored by adjusting treatment parameters of a pulsed ion beam. In addition to a method of surface treating materials for wear and corrosion resistance using pulsed particle ion beams.

Bloomquist, Douglas D. (Albuquerque, NM); Buchheit, Rudy (Albuquerque, NM); Greenly, John B. (Lansing, NY); McIntyre, Dale C. (Albuquerque, NM); Neau, Eugene L. (Albuquerque, NM); Stinnett, Regan W. (Albuquerque, NM)

1996-01-01T23:59:59.000Z

257

Low dimensional magnetism  

E-Print Network (OSTI)

Magnetism in Ultracold Gases 4 Magnetic phase diagram of aMagnetism . . . . . . . . . . . .1.3 Magnetism in condensedIntroduction 1 Brief introduction to magnetism 1.1 Classic

Kjall, Jonas Alexander

2012-01-01T23:59:59.000Z

258

Materials - Home  

NLE Websites -- All DOE Office Websites (Extended Search)

* Coatings & Lubricants * Coatings & Lubricants * Nanofluids * Deformation Joining * Recycling * Catalysts * Assessment * Illinois Center for Advanced Tribology Modeling, Simulation & Software Plug-In Hybrid Electric Vehicles PSAT Smart Grid Student Competitions Technology Analysis Transportation Research and Analysis Computing Center Working With Argonne Contact TTRDC Materials ring on liner reciprocating tester Tribology Lab: Ring-on-liner reciprocating tester. Argonne National Laboratory plays an important role in the Department of Energy's (DOE's) efforts to develop advanced materials for transportation. The materials are developed with DOE support from the EERE Office of Vehicle Technology and Office of Hydrogen, Fuel Cells, and Infrastructure Technologies in collaboration with worldwide industrial partners. Examples

259

Magnetic Viscosity  

Science Journals Connector (OSTI)

1 January 1893 research-article Magnetic Viscosity J. Hopkinson E. Wilson F. Lydall The Royal Society is collaborating with JSTOR to digitize, preserve, and extend access to Proceedings of the Royal Society of London. www.jstor.org

1893-01-01T23:59:59.000Z

260

Rock magnetism  

Science Journals Connector (OSTI)

The past three decades have witnessed a new paradigm, the plate tectonics paradigm, in Earth sciences. The record of the Earth's magnetic field stored in rocks played a major role in the establishment of this par...

Ronald T. Merrill

1989-01-01T23:59:59.000Z

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


261

Magnetic Particle Process Improvement  

SciTech Connect

The magnetic particle testing process is performed to find linear, surface and near surface discontinuities in ferromagnetic test materials. A wet fluorescent method is used at Honeywell Federal Manufacturing & Technologies (FM&T). This method employs a liquid carrier mixed with iron oxide particles in suspension, and the particles used in the method are coated with a fluorescent dye to make them visible under a black light. The process in its current state employs the use of a tank of liquid solution of a mineral oil carrier with iron oxide particles in suspension. The change to the use of an aerosol delivery system with the same material reduces the amount of waste involved in the process while preserving the sensitivity of the testing, shortens the flowtime for the test, and saves labor and material costs.

Hubert, R.R.

2002-08-13T23:59:59.000Z

262

Complex Materials  

SciTech Connect

Valentino Cooper uses some of the world's most powerful computing to understand how materials work at subatomic levels, studying breakthroughs such as piezoelectrics, which convert mechanical stress to electrical energy.

Cooper, Valentino

2014-04-17T23:59:59.000Z

263

Complex Materials  

ScienceCinema (OSTI)

Valentino Cooper uses some of the world's most powerful computing to understand how materials work at subatomic levels, studying breakthroughs such as piezoelectrics, which convert mechanical stress to electrical energy.

Cooper, Valentino

2014-05-23T23:59:59.000Z

264

Controlling Magnetism at the Nanoscale  

E-Print Network (OSTI)

Manipulation of Magnetism - External148 Conclusion A The Magnetism Cheat Sheet A.1 Magnetic157 A.2 Magnetism Unit Conversion

Wong, Jared

2012-01-01T23:59:59.000Z

265

Permanent magnet edge-field quadrupole  

DOE Patents (OSTI)

Planar permanent magnet edge-field quadrupoles for use in particle accelerating machines and in insertion devices designed to generate spontaneous or coherent radiation from moving charged particles are disclosed. The invention comprises four magnetized rectangular pieces of permanent magnet material with substantially similar dimensions arranged into two planar arrays situated to generate a field with a substantially dominant quadrupole component in regions close to the device axis. 10 figs.

Tatchyn, R.O.

1997-01-21T23:59:59.000Z

266

A Small Scale Magnetic Particle Relaxometer  

E-Print Network (OSTI)

Magnetic Particle Imaging (MPI) is a newly found imaging modality. It utilizes superparamagnetic materials as tracers in the blood stream to obtain very high resolutions. MPI promises to have high sensitivity, high spatial resolution...

El Ghamrawy, Ahmed

2013-12-09T23:59:59.000Z

267

Materializing Energy  

E-Print Network (OSTI)

Motivated and informed by perspectives on sustainability and design, this paper draws on a diverse body of scholarly works related to energy and materiality to articulate a perspective on energy-as-materiality and propose a design approach of materializing energy. Three critical themes are presented: the intangibility of energy, the undifferentiatedness of energy, and the availability of energy. Each theme is developed through combination of critical investigation and design exploration, including the development and deployment of several novel design artifacts: Energy Mementos and The Local Energy Lamp. A framework for interacting with energy-as-materiality is proposed involving collecting, keeping, sharing, and activating energy. A number of additional concepts are also introduced, such as energy attachment, energy engagement, energy attunement, local energy and energy meta-data. Our work contributes both a broader, more integrative design perspective on energy and materiality as well as a diversity of more specific concepts and artifacts that may be of service to designers and researchers of interactive systems concerned with sustainability and energy. Author Keywords Sustainability, energy, materiality, design, design theory

James Pierce; Eric Paulos

268

Solar Magnetic Flux Ropes  

E-Print Network (OSTI)

The most probable initial magnetic configuration of a CME is a flux rope consisting of twisted field lines which fill the whole volume of a dark coronal cavity. The flux ropes can be in stable equilibrium in the coronal magnetic field for weeks and even months, but suddenly they loose their stability and erupt with high speed. Their transition to the unstable phase depends on the parameters of the flux rope (i.e., total electric current, twist, mass loading etc.), as well as on the properties of the ambient coronal magnetic field. One of the major governing factors is the vertical gradient of the coronal magnetic field which is estimated as decay index (n). Cold dense prominence material can be collected in the lower parts of the helical flux tubes. Filaments are therefore good tracers of the flux ropes in the corona, which become visible long before the beginning of the eruption. The perspectives of the filament eruptions and following CMEs can be estimated by the comparison of observed filament heights with...

Filippov, Boris; Srivastava, Abhishek K; Uddin, Wahab

2015-01-01T23:59:59.000Z

269

MECHATRONICS ASPECTS OF SMART MATERIALS INDUCED STRAIN ACTUATION Victor Giurgiutiu  

E-Print Network (OSTI)

1 MECHATRONICS ASPECTS OF SMART MATERIALS INDUCED STRAIN ACTUATION Victor Giurgiutiu University-777-0106, email victorg@sc.edu Abstract: The mechatronics aspects of smart materials induced-strain actuation are investigated. Smart materials, a.k.a. active materials, are able to transform electric, magnetic, thermal

Giurgiutiu, Victor

270

Neutrino magnetic moment in a magnetized plasma  

E-Print Network (OSTI)

The contribution of a magnetized plasma to the neutrino magnetic moment is calculated. It is shown that only part of the additional neutrino energy in magnetized plasma connecting with its spin and magnetic field strength defines the neutrino magnetic moment. It is found that the presence of magnetized plasma does not lead to the considerable increase of the neutrino magnetic moment in contrast to the results presented in literature previously.

N. V. Mikheev; E. N. Narynskaya

2010-11-08T23:59:59.000Z

271

Magnetism of carbon clusters  

Science Journals Connector (OSTI)

The ?-electron ring current magnetic susceptibilities and endohedral chemical shifts of the fullerenes are calculated with the London theory. The diamagnetism calculated for the fullerenes that have been characterized to date does not show a monotonic increase toward the graphite value. By carrying out calculations on high-symmetry giant fullerenes (Cn) in the size regime 100magnetic susceptibility of graphite on a per carbon basis. Endohedral chemical shifts are predicted to be invariant to cluster size, but subject to the quantum size effects seen in smaller fullerenes and metallic clusters. The fullerenes are different from the metallic clusters because the finite band gap in conjugated carbon compounds allows the diamagnetic term to dominate at large cluster size. The experimentally observed decrease in nanotube material diamagnetism with temperature is attributed to the increased importance of the Van Vleck term due to finite-temperature effects.

R. C. Haddon and Alfredo Pasquarello

1994-12-01T23:59:59.000Z

272

Exchange-Spring Magnets: Nanocomposite Exchange-Spring Magnets for Motor and Generator Applications  

SciTech Connect

REACT Project: ANL will develop a cost-effective exchange-spring magnet to use in the electric motors of wind generators and EVs that uses no rare earth materials. This ANL exchange-spring magnet combines a hard magnetic outer shell with a soft magnetic inner core—coupling these together increases the performance (energy density and operating temperature). The hard and soft magnet composite particles would be created at the molecular level, followed by consolidation in a magnetic field. This process allows the particles to be oriented to maximize the magnetic properties of low-cost and abundant metals, eliminating the need for expensive imported rare earths. The ultimate goal of this project is to demonstrate this new type of magnet in a prototype electric motor.

None

2012-01-01T23:59:59.000Z

273

Fullerton-120811 - Argonne National Laboratories, Materials Sicence  

NLE Websites -- All DOE Office Websites (Extended Search)

Fullerton-120811 Fullerton-120811 MATERIALS SCIENCE COLLOQUIUM SPEAKER: Professor Eric Fullerton University of California, San Diego TITLE: "Spin-transfer phenomena in high-anisotropy magnetic nanostructures" DATE: Thursday, December 8, 2011 TIME: 11:00 a.m. PLACE: Building 212 / A-157 HOST: Olle Heinonen Refreshments will be served at 10:45 a.m. ABSTRACT: In most magnetic applications the orientations of the magnetic elements are controlled by external magnetic fields. However, it has recently been appreciated that the relative orientations of nano-magnets can be controlled directly by the injection of spin polarized currents known as spin transfer effects. The ability of a spin-polarized current to reverse the magnetization orientation of a nanomagnets should enable a

274

Petroglyphs, Lighting, and Magnetism  

E-Print Network (OSTI)

1950 Electricity and Magnetism: Theory and Applications.I Petroglyphs, Lightning, and Magnetism | Walker Figure 8.I Petroglyphs, Lightning, and Magnetism | Walker Figure IL

Walker, Merle F

2007-01-01T23:59:59.000Z

275

MAGNETISM AND ELECTRON TRANSPORT IN MAGNETORESISTIVE LANTHANUM CALCIUM  

E-Print Network (OSTI)

MAGNETISM AND ELECTRON TRANSPORT IN MAGNETORESISTIVE LANTHANUM CALCIUM MANGANITE A DISSERTATION have been reported that this material is being considered for use as a magnetic field sensor. However, there are many variables such as temperature, magnetic field, chemical composition and processing that greatly

276

Materials Handbook  

Science Journals Connector (OSTI)

... THE sub title of this handbook gives the clue to the mode of treatment of the subject matter, and so ... seventeen to 'alkalis'; in fact, a better title for the book would be "Handbook of Engineering Materials". British trade names are conspicuously few, but no doubt a ...

E. H. TRIPP

1942-08-15T23:59:59.000Z

277

Los Alamos Lab: Materials Physics & Applications Division  

NLE Websites -- All DOE Office Websites (Extended Search)

ADEPS Materials Physics and Applications, MPA ADEPS Materials Physics and Applications, MPA About Us Organization Jobs Materials Physics & Applications Home Center for Integrated Nanotechnologies Superconductivity Technology Center Condensed Matter and Magnet Science Sensors & Electrochemical Devices Materials Chemistry CONTACTS Division Leader Antoinette Taylor Deputy Division Leader David Watkins Point of Contact Susan Duran 505-665-1131 Materials Physics and Applications Division serves as the Laboratory's focal point for fundamental materials physics and materials chemistry, provides world-class user facilities, unique experimental capabilities, and the scientific talent and infrastructure to facilitate understanding and control of materials properties, and develops and apply materials-based solutions

278

Magnetic Catalysis vs Magnetic Inhibition  

E-Print Network (OSTI)

We discuss the fate of chiral symmetry in an extremely strong magnetic field B. We investigate not only quark fluctuations but also neutral meson effects. The former would enhance the chiral-symmetry breaking at finite B according to the Magnetic Catalysis, while the latter would suppress the chiral condensate once B exceeds the scale of the hadron structure. Using a chiral model we demonstrate how neutral mesons are subject to the dimensional reduction and the low dimensionality favors the chiral-symmetric phase. We point out that this effect, the Magnetic Inhibition, can be a feasible explanation for recent lattice-QCD data indicating the decreasing behavior of the chiral-restoration temperature with increasing B.

Kenji Fukushima; Yoshimasa Hidaka

2012-09-06T23:59:59.000Z

279

Magnetic Stereoscopy  

E-Print Network (OSTI)

The space mission STEREO will provide images from two viewpoints. An important aim of the STEREO mission is to get a 3D view of the solar corona. We develop a program for the stereoscopic reconstruction of 3D coronal loops from images taken with the two STEREO spacecraft. A pure geometric triangulation of coronal features leads to ambiguities because the dilute plasma emissions complicates the association of features in image 1 with features in image 2. As a consequence of these problems the stereoscopic reconstruction is not unique and multiple solutions occur. We demonstrate how these ambiguities can be resolved with the help of different coronal magnetic field models (potential, linear and non-linear force-free fields). The idea is that, due to the high conductivity in the coronal plasma, the emitting plasma outlines the magnetic field lines. Consequently the 3D coronal magnetic field provides a proxy for the stereoscopy which allows to eliminate inconsistent configurations. The combination of stereoscopy and magnetic modelling is more powerful than one of these tools alone. We test our method with the help of a model active region and plan to apply it to the solar case as soon as STEREO data become available.

Thomas Wiegelmann; Bernd Inhester

2006-12-21T23:59:59.000Z

280

Titan's New Build Attracts Magnetic Systems Research Impossible Until Now  

NLE Websites -- All DOE Office Websites (Extended Search)

Titan's New Build Attracts Magnetic Systems Research Impossible Until Now Titan's New Build Attracts Magnetic Systems Research Impossible Until Now November 01, 2013 Researchers using Titan are studying the behavior of magnetic systems by simulating nickel atoms as they reach their Curie temperature-the threshold between order (right) and disorder (left) when atoms spin into random magnetic directions of fluctuating magnetic strengths, causing the material to lose its magnetism. As simple as magnets seemed during school science lessons (opposites attract, likes repel), improving the performance of magnetic materials and creating new alloys is so complicated Markus Eisenbach, computational scientist at Oak Ridge National Laboratory, has been waiting for a computer that can perform as many as twenty quadrillion calculations per second to

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


281

Grid-Related Materials Development Across the NETL-RUA: A Proposed Integrated Materials Development Initiative  

NLE Websites -- All DOE Office Websites (Extended Search)

Related Materials Development Across the NETL-RUA: Related Materials Development Across the NETL-RUA: A Proposed Integrated Materials Development Initiative Office of Research & Development Activities Relevant Centers and Expertise Within the Regional University Alliance Needs for Advanced Materials in Grid Applications Forward Looking Vision: Integrated Development Initiative Active / Passive Components in Power Electronics Sensors for Power Flow Control and Condition Monitoring Grid-Scale Energy Storage Enduring Expertise in Electrochemical Materials Emerging Expertise in Magnetic and Optical Materials EPRI Report 1016921 EPRI Report 1020619 Energy Storage Energy Storage Grid of The Future 1) High Renewable Penetration 2) Active Power Flow Control 3) High Electric Vehicle Deployment 4)

282

Magnetocaloric materials and the optimization of cooling power density  

Science Journals Connector (OSTI)

Abstract The magnetocaloric effect is the thermal response of a material to an external magnetic field. This manuscript focuses on the physics and the properties of materials which are commonly used for magnetic refrigeration at cryogenic temperatures. After a brief overview of the magnetocaloric effect and associated thermodynamics, typical requirements on refrigerants are discussed from a standpoint of cooling power density optimization. Finally, a compilation of the most important properties of several common magnetocaloric materials is presented.

Patrick Wikus; Edgar Canavan; Sarah Trowbridge Heine; Koichi Matsumoto; Takenori Numazawa

2014-01-01T23:59:59.000Z

283

Functional Materials for Energy | Advanced Materials | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Thermoelectrics Separations Materials Catalysis Sensor Materials Polymers and Composites Carbon Fiber Related Research Chemistry and Physics at Interfaces Materials Synthesis from...

284

Magnetic domain structures of focused ion beam-patterned cobalt films using scanning ion microscopy with polarization analysis  

E-Print Network (OSTI)

Magnetic domain structures of focused ion beam-patterned cobalt films using scanning ion microscopy Studies of magnetic domain distributions in patterned magnetic materials are of pivotal importance in the areas of ultrahigh density magnetic recording, MRAM design, and miniaturized magnetic sensor arrays

Rau, Carl

285

Assembly and magnetic properties of nickel nanoparticles on silicon nanowires  

SciTech Connect

The directed assembly of magnetic Ni nanoparticles at the tips of silicon nanowires is reported. Using electrodeposition Ni shells of thickness from 10 to 100 nm were selectively deposited on Au catalytic seeds at the ends of nanowires. Magnetic characterization confirms a low coercivity ({approx}115 Oe) ferromagnetic behavior at 300 K. This approach to multifunctional magnetic-semiconducting nanostructure assembly could be extended to electrodeposition of other materials on the nanowire ends, opening up novel ways of device integration. Such magnetically functionalized nanowires offer a new approach to developing novel highly localized magnetic probes for high resolution magnetic resonance force microscopy.

Picraux, Samuel T [Los Alamos National Laboratory; Manandhar, Pradeep [Los Alamos National Laboratory; Nazaretski, E [Los Alamos National Laboratory; Thompson, J [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

286

Thermomagnetic burn control for magnetic fusion reactor  

DOE Patents (OSTI)

Apparatus is provided for controlling the plasma energy production rate of a magnetic-confinement fusion reactor, by controlling the magnetic field ripple. The apparatus includes a group of shield sectors (30a, 30b, etc.) formed of ferromagnetic material which has a temperature-dependent saturation magnetization, with each shield lying between the plasma (12) and a toroidal field coil (18). A mechanism (60) for controlling the temperature of the magnetic shields, as by controlling the flow of cooling water therethrough, thereby controls the saturation magnetization of the shields and therefore the amount of ripple in the magnetic field that confines the plasma, to thereby control the amount of heat loss from the plasma. This heat loss in turn determines the plasma state and thus the rate of energy production.

Rawls, John M. (Del Mar, CA); Peuron, Unto A. (Solana Beach, CA)

1982-01-01T23:59:59.000Z

287

Thermomagnetic burn control for magnetic fusion reactor  

DOE Patents (OSTI)

Apparatus is provided for controlling the plasma energy production rate of a magnetic-confinement fusion reactor, by controlling the magnetic field ripple. The apparatus includes a group of shield sectors formed of ferromagnetic material which has a temperature-dependent saturation magnetization, with each shield lying between the plasma and a toroidal field coil. A mechanism for controlling the temperature of the magnetic shields, as by controlling the flow of cooling water therethrough, thereby controls the saturation magnetization of the shields and therefore the amount of ripple in the magnetic field that confines the plasma, to thereby control the amount of heat loss from the plasma. This heat loss in turn determines the plasma state and thus the rate of energy production.

Rawls, J.M.; Peuron, A.U.

1980-07-01T23:59:59.000Z

288

Wheel-type magnetic refrigerator  

DOE Patents (OSTI)

The disclosure is directed to a wheel-type magnetic refrigerator capable of cooling over a large temperature range. Ferromagnetic or paramagnetic porous materials are layered circumferentially according to their Curie temperature. The innermost layer has the lowest Curie temperature and the outermost layer has the highest Curie temperature. The wheel is rotated through a magnetic field perpendicular to the axis of the wheel and parallel to its direction of rotation. A fluid is pumped through portions of the layers using inner and outer manifolds to achieve refrigeration of a thermal load. 7 figs.

Barclay, J.A.

1983-10-11T23:59:59.000Z

289

Functional Materials for Energy | Advanced Materials | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Energy Storage Fuel Cells Thermoelectrics Separations Materials Catalysis Sensor Materials Polymers and Composites Carbon Fiber Related Research Chemistry and Physics at Interfaces Materials Synthesis from Atoms to Systems Materials Characterization Materials Theory and Simulation Energy Frontier Research Centers Advanced Materials Home | Science & Discovery | Advanced Materials | Research Areas | Functional Materials for Energy SHARE Functional Materials for Energy The concept of functional materials for energy occupies a very prominent position in ORNL's research and more broadly the scientific research sponsored by DOE's Basic Energy Sciences. These materials facilitate the capture and transformation of energy, the storage of energy or the efficient release and utilization of stored energy. A different kind of

290

magnets2  

NLE Websites -- All DOE Office Websites (Extended Search)

II II Painless Physics Articles BEAM COOLING August 2, 1996 By Leila Belkora, Office of Public Affairs ACCELERATION August 16, 1996 By Dave Finley, Accelerator Division Head RF August 30, 1996 By Pat Colestock, Accelerator Division FIXED TARGET PHYSICS September 20, 1996 By Peter H. Garbincius, Physics Section FIXED TARGET PHYSICS PART DEUX October 16, 1996 By Peter H. Garbincius, Physics Section and Leila Belkora, Office of Public Affaris CROSS SECTION November 1, 1996 By Doreen Wackeroth, Theoretical Physics Edited by Leila Belkora, Office of Public Affaris MAGNETS PART I November 15, 1996 By Hank Glass, Technical Support Section Edited by Donald Sena, Office of Public Affairs MAGNETS PART II January 10, 1997 By Hank Glass, Technical Support Section Edited by Donald Sena, Office of Public Affairs

291

Combinatorial synthesis of inorganic or composite materials  

DOE Patents (OSTI)

Methods and apparatus for the preparation and use of a substrate having an array of diverse materials in predefined regions thereon. A substrate having an array of diverse materials thereon is generally prepared by delivering components of materials to predefined regions on a substrate, and simultaneously reacting the components to form at least two materials or, alternatively, allowing the components to interact to form at least two different materials. Materials which can be prepared using the methods and apparatus of the present invention include, for example, covalent network solids, ionic solids and molecular solids. More particularly, materials which can be prepared using the methods and apparatus of the present invention include, for example, inorganic materials, intermetallic materials, metal alloys, ceramic materials, organic materials, organometallic materials, nonbiological organic polymers, composite materials (e.g., inorganic composites, organic composites, or combinations thereof), etc. Once prepared, these materials can be screened for useful properties including, for example, electrical, thermal, mechanical, morphological, optical, magnetic, chemical, or other properties. Thus, the present invention provides methods for the parallel synthesis and analysis of novel materials having useful properties.

Goldwasser, Isy (Palo Alto, CA); Ross, Debra A. (Mountain Ranch, CA); Schultz, Peter G. (La Jolla, CA); Xiang, Xiao-Dong (Danville, CA); Briceno, Gabriel (Baldwin Park, CA); Sun, Xian-Dong (Fremont, CA); Wang, Kai-An (Cupertino, CA)

2010-08-03T23:59:59.000Z

292

Magnetic Reconnection  

SciTech Connect

We review the fundamental physics of magnetic reconnection in laboratory and space plasmas, by discussing results from theory, numerical simulations, observations from space satellites, and the recent results from laboratory plasma experiments. After a brief review of the well-known early work, we discuss representative recent experimental and theoretical work and attempt to interpret the essence of significant modern findings. In the area of local reconnection physics, many significant findings have been made with regard to two- uid physics and are related to the cause of fast reconnection. Profiles of the neutral sheet, Hall currents, and the effects of guide field, collisions, and micro-turbulence are discussed to understand the fundamental processes in a local reconnection layer both in space and laboratory plasmas. While the understanding of the global reconnection dynamics is less developed, notable findings have been made on this issue through detailed documentation of magnetic self-organization phenomena in fusion plasmas. Application of magnetic reconnection physics to astrophysical plasmas is also brie y discussed.

Masaaki Yamada, Russell Kulsrud and Hantao Ji

2009-09-17T23:59:59.000Z

293

Iron-Nitride-Based Magnets: Synthesis and Phase Stabilization of Body Center Tetragonal (BCT) Metastable Fe-N Anisotropic Nanocomposite Magnet- A Path to Fabricate Rare Earth Free Magnet  

SciTech Connect

REACT Project: The University of Minnesota will develop an early stage prototype of an iron-nitride permanent magnet material for EVs and renewable power generators. This new material, comprised entirely of low-cost and abundant resources, has the potential to demonstrate the highest energy potential of any magnet to date. This project will provide the basis for an entirely new class of rare-earth-free magnets capable of generating power without costly and scarce rare earth materials. The ultimate goal of this project is to demonstrate a prototype with magnetic properties exceeding state-of-the-art commercial magnets.

None

2012-01-01T23:59:59.000Z

294

Materials Under Extremes | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Home | Science & Discovery | Advanced Materials | Research Areas | Materials Under Extremes SHARE Materials Under Extremes Materials that can withstand extreme conditions such...

295

Photovoltaic Materials  

SciTech Connect

The goal of the current project was to help make the US solar industry a world leader in the manufacture of thin film photovoltaics. The overall approach was to leverage ORNL’s unique characterization and processing technologies to gain a better understanding of the fundamental challenges for solar cell processing and apply that knowledge to targeted projects with industry members. ORNL has the capabilities in place and the expertise required to understand how basic material properties including defects, impurities, and grain boundaries affect the solar cell performance. ORNL also has unique processing capabilities to optimize the manufacturing process for fabrication of high efficiency and low cost solar cells. ORNL recently established the Center for Advanced Thin-film Systems (CATS), which contains a suite of optical and electrical characterization equipment specifically focused on solar cell research. Under this project, ORNL made these facilities available to industrial partners who were interested in pursuing collaborative research toward the improvement of their product or manufacturing process. Four specific projects were pursued with industrial partners: Global Solar Energy is a solar industry leader in full scale production manufacturing highly-efficient Copper Indium Gallium diSelenide (CIGS) thin film solar material, cells and products. ORNL worked with GSE to develop a scalable, non-vacuum, solution technique to deposit amorphous or nanocrystalline conducting barrier layers on untextured stainless steel substrates for fabricating high efficiency flexible CIGS PV. Ferro Corporation’s Electronic, Color and Glass Materials (“ECGM”) business unit is currently the world’s largest supplier of metallic contact materials in the crystalline solar cell marketplace. Ferro’s ECGM business unit has been the world's leading supplier of thick film metal pastes to the crystalline silicon PV industry for more than 30 years, and has had operational cells and modules in the field for 25 years. Under this project, Ferro leveraged world leading analytical capabilities at ORNL to characterize the paste-to-silicon interface microstructure and develop high efficiency next generation contact pastes. Ampulse Corporation is developing a revolutionary crystalline-silicon (c-Si) thin-film solar photovoltaic (PV) technology. Utilizing uniquely-textured substrates and buffer materials from the Oak Ridge National Laboratory (ORNL), and breakthroughs in Hot-Wire Chemical Vapor Deposition (HW-CVD) techniques in epitaxial silicon developed at the National Renewable Energy Laboratory (NREL), Ampulse is creating a solar technology that is tunable in silicon thickness, and hence in efficiency and economics, to meet the specific requirements of multiple solar PV applications. This project focused on the development of a high rate deposition process to deposit Si, Ge, and Si1-xGex films as an alternate to hot-wire CVD. Mossey Creek Solar is a start-up company with great expertise in the solar field. The primary interest is to create and preserve jobs in the solar sector by developing high-yield, low-cost, high-efficiency solar cells using MSC-patented and -proprietary technologies. The specific goal of this project was to produce large grain formation in thin, net-shape-thickness mc-Si wafers processed with high-purity silicon powder and ORNL's plasma arc lamp melting without introducing impurities that compromise absorption coefficient and carrier lifetime. As part of this project, ORNL also added specific pieces of equipment to enhance our ability to provide unique insight for the solar industry. These capabilities include a moisture barrier measurement system, a combined physical vapor deposition and sputtering system dedicated to cadmium-containing deposits, adeep level transient spectroscopy system useful for identifying defects, an integrating sphere photoluminescence system, and a high-speed ink jet printing system. These tools were combined with others to study the effect of defects on the performance of crystalline silicon and

Duty, C.; Angelini, J.; Armstrong, B.; Bennett, C.; Evans, B.; Jellison, G. E.; Joshi, P.; List, F.; Paranthaman, P.; Parish, C.; Wereszczak, A.

2012-10-15T23:59:59.000Z

296

Method for deriving information regarding stress from a stressed ferromagnetic material  

DOE Patents (OSTI)

A nondestructive evaluation technique is disclosed for deriving stress in ferromagnetic materials including deriving anhysteretic and hysteresis magnetization curves for the material in both unstressed and stressed states. The anhysteretic curve is expressed as a Langevin function. The stress is expressed as an equivalent magnetic field dependent on stress and change of magnetostriction with magnetization. By measurement of these bulk magnetic properties, stress can be derived.

Jiles, D.C.

1991-04-30T23:59:59.000Z

297

Method for deriving information regarding stress from a stressed ferromagnetic material  

DOE Patents (OSTI)

A non-destructive evaluation technique for deriving stress in ferromagnetic materials including deriving anhysteretic and hysteresis magnetization curves for the material in both unstressed and stressed states. The anhysteretic curve is expressed as a Langevin function. The stress is expressed as an equivalent magnetic field dependent on stress and change of magnetostriction with magnetization. By measurement of these bulk magnetic properties, stress can be derived.

Jiles, David C. (Ames, IA)

1991-04-30T23:59:59.000Z

298

Preparation and screening of crystalline inorganic materials  

DOE Patents (OSTI)

Methods and apparatus for the preparation and use of a substrate having an array of diverse materials in predefined regions thereon. A substrate having an array of diverse materials thereon is generally prepared by delivering components of materials to predefined regions on a substrate, and simultaneously reacting the components to form at least two materials. Materials which can be prepared using the methods and apparatus of the present invention include, for example, covalent network solids, ionic solids and molecular solids. More particularly, materials which can be prepared using the methods and apparatus of the present invention include, for example, inorganic materials, intermetallic materials, metal alloys, ceramic materials, organic materials, organometallic materials, non-biological organic polymers, composite materials (e.g., inorganic composites, organic composites, or combinations thereof), etc. Once prepared, these materials can be screened for useful properties including, for example, electrical, thermal, mechanical, morphological, optical, magnetic, chemical, or other properties. Thus, the present invention provides methods for the parallel synthesis and analysis of novel materials having useful properties.

Schultz, Peter G. (La Jolla, CA); Xiang, Xiaodong (Danville, CA); Goldwasser, Isy (Palo Alto, CA); Brice{hacek over (n)}o, Gabriel (Baldwin Park, CA); Sun, Xiao-Dong (Fremont, CA); Wang, Kai-An (Cupertino, CA)

2008-10-28T23:59:59.000Z

299

Combinatorial screening of inorganic and organometallic materials  

DOE Patents (OSTI)

Methods and apparatus for the preparation and use of a substrate having an array of diverse materials in predefined regions thereon. A substrate having an array of diverse materials thereon is generally prepared by delivering components of materials to predefined regions on a substrate, and simultaneously reacting the components to form at least two materials. Materials which can be prepared using the methods and apparatus of the present invention include, for example, covalent network solids, ionic solids and molecular solids. More particularly, materials which can be prepared using the methods and apparatus of the present invention include, for example, inorganic materials, intermetallic materials, metal alloys, ceramic materials, organic materials, organometallic materials, non-biological organic polymers, composite materials (e.g., inorganic composites, organic composites, or combinations thereof), etc. Once prepared, these materials can be screened for useful properties including, for example, electrical, thermal, mechanical, morphological, optical, magnetic, chemical, or other properties. Thus, the present invention provides methods for the parallel synthesis and analysis of novel materials having useful properties.

Schultz, Peter G. (Oakland, CA); Xiang, Xiaodong (Alameda, CA); Goldwasser, Isy (Alameda, CA)

2002-01-01T23:59:59.000Z

300

Magnetic Reconnection in Astrophysical and  

E-Print Network (OSTI)

Magnetic Reconnection in Astrophysical and Laboratory Plasmas Ellen G. Zweibel1 and Masaaki Yamada2 astrophysics, magnetic fields, magnetic reconnection Abstract Magnetic reconnection is a topological rearrangement of magnetic field that converts magnetic energy to plasma energy. Astrophysical flares, from

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


301

Electronic Structure and Magnetism in Diluted Magnetic Semiconductors  

NLE Websites -- All DOE Office Websites (Extended Search)

Electronic Structure and Magnetism in Diluted Magnetic Semiconductors Electronic Structure and Magnetism in Diluted Magnetic Semiconductors Print Wednesday, 29 November 2006 00:00...

302

National High Magnetic Field Laboratory Audio Dictionary: Magnetic...  

NLE Websites -- All DOE Office Websites (Extended Search)

Links Magnets from Mini to Mighty Meet the Magnets How to Make an Electromagnet (audio slideshow) Compasses in Magnetic Fields (interactive tutorial) Magnetic Field Around a...

303

Manganese-Aluminum-Based Magnets: Nanocrystalline t-MnAI Permanent Magnets  

SciTech Connect

REACT Project: Dartmouth is developing specialized alloys with magnetic properties superior to the rare earths used in today’s best magnets. EVs and renewable power generators typically use rare earths to turn the axles in their electric motors due to the magnetic strength of these minerals. However, rare earths are difficult and expensive to refine. Dartmouth will swap rare earths for a manganese-aluminum alloy that could demonstrate better performance and cost significantly less. The ultimate goal of this project is to develop an easily scalable process that enables the widespread use of low-cost and abundant materials for the magnets used in EVs and renewable power generators.

None

2012-01-01T23:59:59.000Z

304

Cerium-Based Magnets: Novel High Energy Permanent Magnet Without Critical Elements  

SciTech Connect

REACT Project: Ames Laboratory will develop a new class of permanent magnets based on the more commonly available element cerium for use in both EVs and renewable power generators. Cerium is 4 times more abundant and significantly less expensive than the rare earth element neodymium, which is frequently used in today’s most powerful magnets. Ames Laboratory will combine other metal elements with cerium to create a new magnet that can remain stable at the high temperatures typically found in electric motors. This new magnetic material will ultimately be demonstrated in a prototype electric motor, representing a cost-effective and efficient alternative to neodymium-based motors.

None

2012-01-01T23:59:59.000Z

305

Critical Materials Workshop  

Energy.gov (U.S. Department of Energy (DOE))

Presentations during the Critical Materials Workshop held on April 3, 2012 overviewing critical materials strategies

306

Accelerator Quality HTS Dipole Magnet Demonstrator designs for the EuCARD-2, 5 Tesla 40 mm Clear Aperture Magnet  

E-Print Network (OSTI)

Future high-energy accelerators will need very high magnetic fields in the range of 20 T. The EuCARD-2 work-package-10 is a collaborative push to take HTS materials into an accelerator quality demonstrator magnet. The demonstrator will produce 5 T standalone and between 17 T and 20 T, when inserted into the 100 mm aperture of Fresca-2 high field out-sert magnet. The HTS magnet will demonstrate the field strength and field quality that can be achieved. An effective quench detection and protection system will have to be developed to operate with the HTS superconducting materials. This paper presents a ReBCO magnet design using multi strand Roebel cable that develops a stand-alone field of 5 T in a 40 mm clear aperture and discusses the challenges associated with good field quality using this type of material. A selection of magnet designs is presented as result of a first phase of development.

Kirby, G; Ballarino, A; Bottura, L; Chouika, N; Clement, S; Datskov, V; Fajardo, L; Fleiter, J; Gauthier, R; Lambert, L; Lopes, M; Perez, J; DeRijk, G; Rijllart, A; Rossi, L; Ten Kate, H; Durante, M; Fazilleau, P; Lorin, C; Haro, E; Stenvall, A; Caspi, S; Marchevsky, M; Goldacker, W; Kario, A

2014-01-01T23:59:59.000Z

307

Critical Materials Institute  

ScienceCinema (OSTI)

Ames Laboratory Director Alex King talks about the goals of the Critical Materials Institute in diversifying the supply of critical materials, developing substitute materials, developing tools and techniques for recycling critical materials, and forecasting materials needs to avoid future shortages.

Alex King

2013-06-05T23:59:59.000Z

308

Tunable dynamic response of magnetic gels: impact of structural properties and magnetic fields  

E-Print Network (OSTI)

Ferrogels and magnetic elastomers feature mechanical properties that can be reversibly tuned from outside through magnetic fields. Here we concentrate on the question how their dynamic response can be adjusted. The influence of three factors on the dynamic behavior is demonstrated using appropriate minimal models: first, the orientational memory imprinted into one class of the materials during their synthesis; second, the structural arrangement of the magnetic particles in the materials; and third, the strength of an external magnetic field. To illustrate the latter point, structural data are extracted from a real experimental sample and analyzed. Understanding how internal structural properties and external influences impact the dominant dynamical properties helps to design materials that optimize the requested behavior.

Mitsusuke Tarama; Peet Cremer; Dmitry Y. Borin; Stefan Odenbach; Hartmut Löwen; Andreas M. Menzel

2014-06-26T23:59:59.000Z

309

Superconducting magnet  

DOE Patents (OSTI)

A superconducting magnet designed to produce magnetic flux densities of the order of 4 to 5 Webers per square meter is constructed by first forming a cable of a plurality of matrixed superconductor wires with each wire of the plurality insulated from each other one. The cable is shaped into a rectangular cross-section and is wound with tape in an open spiral to create cooling channels. Coils are wound in a calculated pattern in saddle shapes to produce desired fields, such as dipoles, quadrupoles, and the like. Wedges are inserted between adjacent cables as needed to maintain substantially radial placement of the long dimensions of cross sections of the cables. After winding, individual strands in each of the cables are brought out to terminals and are interconnected to place all of the strands in series and to maximize the propagation of a quench by alternating conduction from an inner layer to an outer layer and from top half to bottom half as often as possible. Individual layers are separated from others by spiraled aluminum spacers to facilitate cooling. The wound coil is wrapped with an epoxy tape that is cured by heat and then machined to an interference fit with an outer aluminum pipe which is then affixed securely to the assembled coil by heating it to make a shrink fit. In an alternate embodiment, one wire of the cable is made of copper or the like to be heated externally to propagate a quench.

Satti, John A. (Naperville, IL)

1980-01-01T23:59:59.000Z

310

Plutonium less mysterious with nuclear magnetic resonance  

NLE Websites -- All DOE Office Websites (Extended Search)

Plutonium less mysterious with nuclear magnetic resonance Plutonium less mysterious with nuclear magnetic resonance Plutonium less mysterious with nuclear magnetic resonance For more than 50 years, chemists and physicists have been searching for the plutonium-239 magnetic resonance signal. May 21, 2012 Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials. Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials.

311

Hermetically sealed superconducting magnet motor  

DOE Patents (OSTI)

A hermetically sealed superconducting magnet motor includes a rotor separated from a stator by either a radial gap, an axial gap, or a combined axial and radial gap. Dual conically shaped stators are used in one embodiment to levitate a disc-shaped rotor made of superconducting material within a conduit for moving cryogenic fluid. As the rotor is caused to rotate when the field stator is energized, the fluid is pumped through the conduit.

DeVault, Robert C. (Knoxville, TN); McConnell, Benjamin W. (Knoxville, TN); Phillips, Benjamin A. (Benton Harbor, MI)

1996-01-01T23:59:59.000Z

312

Hermetically sealed superconducting magnet motor  

DOE Patents (OSTI)

A hermetically sealed superconducting magnet motor includes a rotor separated from a stator by either a radial gap, an axial gap, or a combined axial and radial gap. Dual conically shaped stators are used in one embodiment to levitate a disc-shaped rotor made of superconducting material within a conduit for moving cryogenic fluid. As the rotor is caused to rotate when the field stator is energized, the fluid is pumped through the conduit. 6 figs.

DeVault, R.C.; McConnell, B.W.; Phillips, B.A.

1996-07-02T23:59:59.000Z

313

Fundamental and Magnetic-Hardening Studies of Rare-Earth and Nanocomposite Magnets  

SciTech Connect

In this project we study new nanocrystalline and nanocomposite structures that have high potential for permanent-magnet development. These materials, which can be synthesized to have either very high or intermediate coercivities, have many applications in electric power, transportation, and information-storage industries. There is great interest in further development of understanding and application of these materials.

Sellmyer, David J.

2003-12-22T23:59:59.000Z

314

Magnetism and Superconductivity in Iron Pnictides  

SciTech Connect

The discovery of high temperature superconductivity in iron pnictides and chalcogenides has resulted in surprising new insights into high temperature superconductivity and its relationship with magnetism. Here we provide an overview of some of what is known about these materials and in particular about the interplay of magnetism and superconductivity in them. Similarities and contrasts with cuprate superconductors are emphasized and the superconducting pairing is discussed within the framework of spin fluctuation induced pairing.

Singh, David J [ORNL

2012-01-01T23:59:59.000Z

315

New directions in materials for thermomagnetic cooling  

SciTech Connect

The authors review thermoelectric effects in a magnetic field at a phenomenological level. Discussions of the difficulties in computing the limiting performance for both Peltier and Ettingshausen coolers are presented. New principles are discussed to guide the materials scientist in the search for better Ettingshausen materials. These principals are based on the tensor transport and solid state electronic properties of Bi{sub 1{minus}x}Sb{sub x} alloys. A brief review of the subtle measurement problems is presented.

Migliori, A.; Freibert, F.; Darling, T.W. [and others

1998-12-31T23:59:59.000Z

316

Gas storage materials, including hydrogen storage materials  

DOE Patents (OSTI)

A material for the storage and release of gases comprises a plurality of hollow elements, each hollow element comprising a porous wall enclosing an interior cavity, the interior cavity including structures of a solid-state storage material. In particular examples, the storage material is a hydrogen storage material, such as a solid state hydride. An improved method for forming such materials includes the solution diffusion of a storage material solution through a porous wall of a hollow element into an interior cavity.

Mohtadi, Rana F; Wicks, George G; Heung, Leung K; Nakamura, Kenji

2014-11-25T23:59:59.000Z

317

Interface Magnetism in Multiferroics  

E-Print Network (OSTI)

1.2.1 Magnetism . . . . . . . . . . . . . . . . . . . 1.2.2domain walls . . . . . 3 Magnetism of domain walls in BiFeOof electrical control of magnetism in mixed phase BiFeO 3

He, Qing

2011-01-01T23:59:59.000Z

318

Materials Science & Tech Division | Advanced Materials | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

production of battery cells, magnetic field processing, specialized rolling technologies, additive manufacturing, etc. Laboratories for comprehensive evaluations of low-level...

319

Hidden Rotational Symmetries in Magnetic Domain Patterns  

NLE Websites -- All DOE Office Websites (Extended Search)

Hidden Rotational Symmetries in Magnetic Domain Patterns Print Hidden Rotational Symmetries in Magnetic Domain Patterns Print Magnetic thin films have complicated domain patterns that may or may not repeat with each cycle through a hysteresis loop. A magnetic thin film with perpendicular anisotropy, such as that used in computer hard drives, for example, commonly exhibits labyrinthine domain patterns. These patterns are disordered over a macroscopic length scale, and intuitively we do not expect to observe any symmetry in such systems. Scientists at the ALS, the University of Oregon, and the University of California, San Diego, have recently used coherent soft x-ray scattering with angular Fourier analysis to discover that the disordered domain patterns do, in fact, exhibit rotational symmetries, which can be as small as two-fold or as large as 30-fold. Their study of magnetic symmetries gives scientists a toolbox for discovering hidden symmetries in diverse material systems.

320

HERA Upgrade Project | Superconducting Magnet Division  

NLE Websites -- All DOE Office Websites (Extended Search)

HERA Upgrade Project HERA Upgrade Project As part of the HERA luminosity upgrade, 6 superconducting Interaction Region quadrupoles were delivered, accepted, and are in service. These 6 layer magnets were designed to include the main quadrupole focus, a skew quad, a normal and skew dipole, and a final sextupole layer. Because of the physical space constraints imposed by the existing detector region components, the DESY magnets were of necessity designed to be very compact. In addition, they are also are required to operate within the solenoidal detector fields at the collision points, so all construction materials had to be non magnetic. Two types of DESY magnets were fabricated. The first, designated as G0, was a two meter long, constant radius magnet. The second, designated GG, is a

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


321

Hidden Rotational Symmetries in Magnetic Domain Patterns  

NLE Websites -- All DOE Office Websites (Extended Search)

Hidden Rotational Symmetries in Hidden Rotational Symmetries in Magnetic Domain Patterns Hidden Rotational Symmetries in Magnetic Domain Patterns Print Wednesday, 27 June 2012 00:00 Magnetic thin films have complicated domain patterns that may or may not repeat with each cycle through a hysteresis loop. A magnetic thin film with perpendicular anisotropy, such as that used in computer hard drives, for example, commonly exhibits labyrinthine domain patterns. These patterns are disordered over a macroscopic length scale, and intuitively we do not expect to observe any symmetry in such systems. Scientists at the ALS, the University of Oregon, and the University of California, San Diego, have recently used coherent soft x-ray scattering with angular Fourier analysis to discover that the disordered domain patterns do, in fact, exhibit rotational symmetries, which can be as small as two-fold or as large as 30-fold. Their study of magnetic symmetries gives scientists a toolbox for discovering hidden symmetries in diverse material systems.

322

Magnetic field decay in model SSC dipoles  

SciTech Connect

We have observed that some of our model SSC dipoles have long time constant decays of the magnetic field harmonics with amplitudes large enough to result in significant beam loss, if they are not corrected. The magnets were run at constant current at the SSC injection field level of 0.3 tesla for one to three hours and changes in the magnetic field were observed. One explanation for the observed field decay is time dependent superconductor magnetization. Another explanation involves flux creep or flux flow. Data are presented on how the decay changes with previous flux history. Similar magnets with different Nb-Ti filament spacings and matrix materials have different long time field decay. A theoretical model using proximity coupling and flux creep for the observed field decay is discussed. 10 refs., 5 figs., 2 tabs.

Gilbert, W.S.; Althaus, R.F.; Barale, P.J.; Benjegerdes, R.W.; Green, M.A.; Green, M.I.; Scanlan, R.M.

1988-08-01T23:59:59.000Z

323

New classes of magnetoelectric materials promise advances in computing  

NLE Websites -- All DOE Office Websites (Extended Search)

New classes of magnetoelectric materials promise advances in computing New classes of magnetoelectric materials promise advances in computing technology By Jared Sagoff * February 7, 2013 Tweet EmailPrint ARGONNE, Ill. - Although scientists have been aware that magnetism and electricity are two sides of the same proverbial coin for almost 150 years, researchers are still trying to find new ways to use a material's electric behavior to influence its magnetic behavior, or vice versa. Thanks to new research by an international team of researchers led by the U.S. Department of Energy's Argonne National Laboratory, physicists have developed new methods for controlling magnetic order in a particular class of materials known as "magnetoelectrics." Magnetoelectrics get their name from the fact that their magnetic and electric properties are coupled to each other. Because this physical link

324

Fundamental Scientific Problems in Magnetic Recording  

SciTech Connect

Magnetic data storage technology is presently leading the high tech industry in advancing device integration--doubling the storage density every 12 months. To continue these advancements and to achieve terra bit per inch squared recording densities, new approaches to store and access data will be needed in about 3-5 years. In this project, collaboration between Oak Ridge National Laboratory (ORNL), Center for Materials for Information Technology (MINT) at University of Alabama (UA), Imago Scientific Instruments, and Seagate Technologies, was undertaken to address the fundamental scientific problems confronted by the industry in meeting the upcoming challenges. The areas that were the focus of this study were to: (1) develop atom probe tomography for atomic scale imaging of magnetic heterostructures used in magnetic data storage technology; (2) develop a first principles based tools for the study of exchange bias aimed at finding new anti-ferromagnetic materials to reduce the thickness of the pinning layer in the read head; (3) develop high moment magnetic materials and tools to study magnetic switching in nanostructures aimed at developing improved writers of high anisotropy magnetic storage media.

Schulthess, T.C.; Miller, M.K.

2007-06-27T23:59:59.000Z

325

Detection of magnetic resonance signals using a magnetoresistive sensor  

DOE Patents (OSTI)

A method and apparatus are described wherein a micro sample of a fluidic material may be assayed without sample contamination using NMR techniques, in combination with magnetoresistive sensors. The fluidic material to be assayed is first subject to pre-polarization, in one embodiment, by passage through a magnetic field. The magnetization of the fluidic material is then subject to an encoding process, in one embodiment an rf-induced inversion by passage through an adiabatic fast-passage module. Thereafter, the changes in magnetization are detected by a pair of solid-state magnetoresistive sensors arranged in gradiometer mode. Miniaturization is afforded by the close spacing of the various modules.

Budker, Dmitry; Pines, Alexander; Xu, Shoujun; Hilty, Christian; Ledbetter, Micah P; Bouchard, Louis S

2013-10-01T23:59:59.000Z

326

Superconducting materials for large scale applications  

SciTech Connect

Significant improvements in the properties ofsuperconducting materials have occurred recently. These improvements arebeing incorporated into the latest generation of wires, cables, and tapesthat are being used in a broad range of prototype devices. These devicesinclude new, high field accelerator and NMR magnets, magnets for fusionpower experiments, motors, generators, and power transmission lines.These prototype magnets are joining a wide array of existing applicationsthat utilize the unique capabilities of superconducting magnets:accelerators such as the Large Hadron Collider, fusion experiments suchas ITER, 930 MHz NMR, and 4 Tesla MRI. In addition, promising newmaterials such as MgB2 have been discovered and are being studied inorder to assess their potential for new applications. In this paper, wewill review the key developments that are leading to these newapplications for superconducting materials. In some cases, the key factoris improved understanding or development of materials with significantlyimproved properties. An example of the former is the development of Nb3Snfor use in high field magnets for accelerators. In other cases, thedevelopment is being driven by the application. The aggressive effort todevelop HTS tapes is being driven primarily by the need for materialsthat can operate at temperatures of 50 K and higher. The implications ofthese two drivers for further developments will be discussed. Finally, wewill discuss the areas where further improvements are needed in order fornew applications to be realized.

Scanlan, Ronald M.; Malozemoff, Alexis P.; Larbalestier, David C.

2004-05-06T23:59:59.000Z

327

X-Ray Diffraction Microscopy of Magnetic Structures  

NLE Websites -- All DOE Office Websites (Extended Search)

X-Ray Diffraction Microscopy of Magnetic Structures Print X-Ray Diffraction Microscopy of Magnetic Structures Print science brief icon Scientists working at ALS Beamline 12.0.2.2 have demonstrated a new x-ray technique for producing short-exposure nanoscale images of the magnetic structure of materials. The new method combines aspects of coherent x-ray diffraction, which can determine 3-D charge distributions, and resonant magnetic scattering, which is sensitive to magnetic structures. Physicists have used coherent x-ray diffraction to measure the electron density of complicated molecules. The formula used to make these calculations contains terms that relate to the electron spin of magnetic atoms, but these terms are traditionally ignored since coherent x-ray diffraction has not been used to retrieve magnetic information. Using the full formula allows for the determination of not only the electron density, but also the magnetic spin distribution and its orientation.

328

X-Ray Diffraction Microscopy of Magnetic Structures  

NLE Websites -- All DOE Office Websites (Extended Search)

X-Ray Diffraction Microscopy of Magnetic Structures Print X-Ray Diffraction Microscopy of Magnetic Structures Print science brief icon Scientists working at ALS Beamline 12.0.2.2 have demonstrated a new x-ray technique for producing short-exposure nanoscale images of the magnetic structure of materials. The new method combines aspects of coherent x-ray diffraction, which can determine 3-D charge distributions, and resonant magnetic scattering, which is sensitive to magnetic structures. Physicists have used coherent x-ray diffraction to measure the electron density of complicated molecules. The formula used to make these calculations contains terms that relate to the electron spin of magnetic atoms, but these terms are traditionally ignored since coherent x-ray diffraction has not been used to retrieve magnetic information. Using the full formula allows for the determination of not only the electron density, but also the magnetic spin distribution and its orientation.

329

X-Ray Diffraction Microscopy of Magnetic Structures  

NLE Websites -- All DOE Office Websites (Extended Search)

X-Ray Diffraction Microscopy of Magnetic Structures Print X-Ray Diffraction Microscopy of Magnetic Structures Print science brief icon Scientists working at ALS Beamline 12.0.2.2 have demonstrated a new x-ray technique for producing short-exposure nanoscale images of the magnetic structure of materials. The new method combines aspects of coherent x-ray diffraction, which can determine 3-D charge distributions, and resonant magnetic scattering, which is sensitive to magnetic structures. Physicists have used coherent x-ray diffraction to measure the electron density of complicated molecules. The formula used to make these calculations contains terms that relate to the electron spin of magnetic atoms, but these terms are traditionally ignored since coherent x-ray diffraction has not been used to retrieve magnetic information. Using the full formula allows for the determination of not only the electron density, but also the magnetic spin distribution and its orientation.

330

Transport of Paramagnetic Liquids under Nonuniform High Magnetic Field  

Science Journals Connector (OSTI)

The recent development of numerous superconducting magnets led to remarkable increment of the investigations under high magnetic field intensities in particular in chemistry, physics and biology.1 The application of high magnetic fields clarified the existence of the magnetic force acting on any kind of nonmagnetic (paramagnetic or diamagnetic) materials. ... In the experimental conditions where the bore axis of the superconducting magnet is set vertically, the magnetic field takes a parabolic distribution in a horizontal direction with rotational symmetry, such as where B0 is the magnetic flux density in the center of the bore, ? the coefficient characterizing the parabolic shape of the magnetic field distribution, and r the coordinate of the radial axis. ... T. Dashed lines are fitted curves from eq 17. ...

Olivier Devos; Ryoichi Aogaki

2000-05-10T23:59:59.000Z

331

Superconducting magnetic energy storage  

SciTech Connect

Recent programmatic developments in Superconducting Magnetic Energy Storage (SMES) have prompted renewed and widespread interest in this field. In mid 1987 the Defense Nuclear Agency, acting for the Strategic Defense Initiative Office, issued a request for proposals for the design and construction of SMES Engineering Test Model (ETM). Two teams, one led by Bechtel and the other by Ebasco, are now engaged in the first phase of the development of a 10 to 20 MWhr ETM. This report presents the rationale for energy storage on utility systems, describes the general technology of SMES, and explains the chronological development of the technology. The present ETM program is outlined; details of the two projects for ETM development are described in other papers in these proceedings. The impact of high T/sub c/ materials on SMES is discussed. 69 refs., 3 figs., 3 tabs.

Hassenzahl, W.

1988-08-01T23:59:59.000Z

332

The magnetic properties of nanocrystalline CoLa0.1Fe1.9O4 ferrite under an external AC magnetic field  

Science Journals Connector (OSTI)

Development of morphology-controlled synthesis methodologies is of great interest in materials science [1–3...]. Ferrites are important materials, which are broadly used in magnetic fields, including ferrofluid t...

Lijun Zhao; Hua Yang; Lei Lu

2008-10-01T23:59:59.000Z

333

Joining of parts via magnetic heating of metal aluminum powders  

DOE Patents (OSTI)

A method of joining at least two parts includes steps of dispersing a joining material comprising a multi-phase magnetic metal-aluminum powder at an interface between the at least two parts to be joined and applying an alternating magnetic field (AMF). The AMF has a magnetic field strength and frequency suitable for inducing magnetic hysteresis losses in the metal-aluminum powder and is applied for a period that raises temperature of the metal-aluminum powder to an exothermic transformation temperature. At the exothermic transformation temperature, the metal-aluminum powder melts and resolidifies as a metal aluminide solid having a non-magnetic configuration.

Baker, Ian

2013-05-21T23:59:59.000Z

334

Femtosecond Opto-Magnetism  

Science Journals Connector (OSTI)

We demonstrate that circularly polarized laser pulses may selectively excite different modes of magnetic resonance, realize quantum control of magnons, trigger magnetic phase...

Kimel, Alexey; Kirilyuk, A; Rasing, Th

335

Magnets for Muon 6D Cooling Channels  

SciTech Connect

The Helical Cooling Channel (HCC), an innovative technique for six-dimensional (6D) cooling of muon beams using a continuous absorber inside superconducting magnets, has shown considerable promise based on analytic and simulation studies. The implementation of this revolutionary method of muon cooling requires high field superconducting magnets that provide superimposed solenoid, helical dipole, and helical quadrupole fields. Novel magnet design concepts are required to provide HCC magnet systems with the desired fields for 6D muon beam cooling. New designs feature simple coil configurations that produce these complex fields with the required characteristics, where new high field conductor materials are particularly advantageous. The object of the program was to develop designs and construction methods for HCC magnets and design a magnet system for a 6D muon beam cooling channel. If successful the program would develop the magnet technologies needed to create bright muon beams for many applications ranging from scientific accelerators and storage rings to beams to study material properties and new sources of energy. Examples of these applications include energy frontier muon colliders, Higgs and neutrino factories, stopping muon beams for studies of rare fundamental interactions and muon catalyzed fusion, and muon sources for cargo screening for homeland security.

Johnson, Rolland [Muons, Inc.; Flanagan, Gene [Muons, Inc.

2014-09-10T23:59:59.000Z

336

Superconducting Magnet Technology for Future Hadron Colliders  

SciTech Connect

The application of superconducting magnets to large-scale particle accelerators was successfully demonstrated with the completion of the Tevatron at Fermilab in 1983. This machine, utilizing dipole magnets operating at 4.5 T, has been operating successfully for the past 12 years. This success was followed a few years later by HERA, an electron-proton collider that uses superconducting quadrupoles and dipoles of a design similar to those in the Tevatron. The next major project was the ill-fated SSC, which was cancelled in 1993. However, the SSC R&D effort did succeed in demonstrating the reliable operation of dipole magnets up to 6.6 T. The LHC, now under construction, pushes the ductile superconductor, NbTi, to its limit in dipoles designed to operate at fields of 8.6 T at 1.8 K. Several recent studies have addressed the issues involved in taking the next step beyond the LHC. The Division of Particles and Fields Workshop on Future Hadron Facilities in the U.S., held at Indiana U. in 1994, examined two possible facilities--a 2-TeV on 2-TeV collider and a 30-Tev on 30-Tev collider. The participants arrived at the following conclusions with regard to superconducting magnets: (1) Superconducting magnets are the enabling technology for high energy colliders. As such, the highest priority for the future of hadron facilities in the U.S. is the reassembly of a U.S. superconducting magnet R&D program. (2) emphasis on conductor development and new magnet designs; and (3) goals of such a program might be (a) the development of a 9-10 Tesla magnet based on NbTi technology; (b) the development of high quality quadrupoles with gradients in the range 250-300 T/m; and (c) initiation of R&D activities aimed at moving beyond the existing technology as appears to be required for the development of a magnet operating at 12-15 Tesla. In order to reach fields above 10 T, magnet designers must turn to new materials with higher critical fields than that of NbTi. Several candidate conductors exist; unfortunately, all of these new materials are brittle, and thus pose new challenges to the magnet designers. At the same time that the forces on the magnet windings are increasing due to the higher Lorentz force associated with the higher magnetic fields, the conductor tensile strain must be limited to less than about 0.5% to prevent damage to the brittle superconducting material. Also, coil fabrication methods must be changed. If the superconductor is in the reacted, or brittle, state, the coil winding procedure must be modified to prevent overstraining. If the alternative wind and react approach is used, new insulating materials must be used that can survive the high temperature reactions (650 to 800 C) necessary to form the superconducting compounds. The issues associated with high-field dipole magnets have been discussed at a number of workshops, including those at DESY in 1991 and LBL in 1992. These workshops were extremely useful in defining the problems and focusing the attention of both materials and magnet experts on high-field dipole magnets; however, since neither set of proceedings was published, the information is not readily available. More recently, a workshop was held in Erice, Italy, under the sponsorship of the Ettore Maiorana Center for Scientific Culture. This international workshop was attended by 20 scientists from Europe, Japan, and the U.S., and the summary of that work, which represents the most recent and thorough assessment of the status of high-field magnets for accelerator magnets, is presented.

Scanlan, R.M.; Barletta, W.A.; Dell'Orco, D.; McInturff, A.D.; Asner, A.; Collings, E.W.; Dahl, P.F.; Desportes, H.; Devred, A.; Garre, R.; Gregory, E.; Hassenzahl, W.; Lamm, M.; Larbalestier, D.; Leory, D.; McIntyre, P.; Miller, J.; Shintomi, T.; ten Kate, H.; Wipf, S.

1994-10-01T23:59:59.000Z

337

Multi Material Paradigm  

Energy Savers (EERE)

Multi Material Paradigm Glenn S. Daehn Department of Materials Science and Engineering, The Ohio State University Advanced Composites (FRP) Steel Spaceframe Multi Material Concept...

338

Determining the minimum mass and cost of a magnetic refrigerator  

E-Print Network (OSTI)

An expression is determined for the mass of the magnet and magnetocaloric material needed for a magnetic refrigerator and these are determined using numerical modeling for both parallel plate and packed sphere bed regenerators as function of temperature span and cooling power. As magnetocaloric material Gd or a model material with a constant adiabatic temperature change, representing a infinitely linearly graded refrigeration device, is used. For the magnet a maximum figure of merit magnet or a Halbach cylinder is used. For a cost of \\$40 and \\$20 per kg for the magnet and magnetocaloric material, respectively, the cheapest 100 W parallel plate refrigerator with a temperature span of 20 K using Gd and a Halbach magnet has 0.8 kg of magnet, 0.3 kg of Gd and a cost of \\$35. Using the constant material reduces this cost to \\$25. A packed sphere bed refrigerator with the constant material costs \\$7. It is also shown that increasing the operation frequency reduces the cost. Finally, the lowest cost is also found a...

Bjørk, R; Bahl, C R H; Pryds, N

2014-01-01T23:59:59.000Z

339

E-Print Network 3.0 - alternating magnetic properties Sample...  

NLE Websites -- All DOE Office Websites (Extended Search)

56 nature materials | VOL 6 | JANUARY 2007 | www.nature.comnaturematerials 13 REVIEW ARTICLE Summary: -sought control of electric properties by magnetic fields was...

340

A Snowflake-Shaped Magnetic Field Holds Promise for Taming Harsh...  

NLE Websites -- All DOE Office Websites (Extended Search)

A Snowflake-Shaped Magnetic Field Holds Promise for Taming Harsh Fusion Plasmas Recent experiments have confirmed the great potential of a novel plasma-material interface concept....

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


341

E-Print Network 3.0 - axial magnetic bearing Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

- Department of Physics, University of Central Florida Collection: Physics ; Materials Science 3 Magnetic Pressure and Shape of Ferrofluid Seals in Cylindrical Structures...

342

E-Print Network 3.0 - ac magnetic susceptibility Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Spinu, Leonard - Department of Physics, University of New Orleans Collection: Materials Science ; Engineering 2 Fig. 1. Scanning electron micrograph of magnetic spherules...

343

E-Print Network 3.0 - ac magnetization measurements Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Engineering Department, Sungkyunkwan University Collection: Materials Science 79 TEST RESULTS OF HTS COILS AND AN R&D MAGNET FOR RIA* , M. Anerella, M. Harrison, J....

344

E-Print Network 3.0 - acceleration magnetic field Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

of Electronic Engineering, Tohoku University Collection: Physics ; Materials Science 86 TEST RESULTS OF HTS COILS AND AN R&D MAGNET FOR RIA* , M. Anerella, M. Harrison, J....

345

Nuclear Reactor Materials and Fuels  

Science Journals Connector (OSTI)

Nuclear reactor materials and fuels can be classified into six categories: Nuclear fuel materials Nuclear clad materials Nuclear coolant materials Nuclear poison materials Nuclear moderator materials

Dr. James S. Tulenko

2012-01-01T23:59:59.000Z

346

Magnetorheological materials, method for making, and applications thereof  

SciTech Connect

A magnetorheological material comprises a magnetic particle and a ceramic material, wherein the magnetorheological material is in a dried form and further wherein a portion of the ceramic material is in the form of a nanocrystalline coating over the entire exterior surface of the magnetic particle and another portion of the ceramic material is in the form of a free nanocrystal. A magnetorheological material comprises a magnetic particle having a ceramic material coating over an external surface thereof as a result of a coating process, and a free nanocrystal of the ceramic material in the form of a residual by-product of the coating process. A sol-gel process for making a magnetorheological product comprises providing a sol of a desired ceramic coating material; combining a desired quantity of carbonyl iron (CI) particles with the sol to coat the CI particles with the ceramic coating material; creating a resulting quantity of nanocrystalline ceramic material-coated CI particles and a quantity of free nanocrystals of the ceramic material; and, drying the resulting quantity of coated CI particles and free nanocrystals to a moisture content equal to or less than 2 wt %.

Shen, Rui; Yang, Hong; Shafrir, Shai N.; Miao, Chunlin; Wang, Mimi; Mici, Joni; Lambropoulos, John C.; Jacobs, Stephen D.

2014-08-19T23:59:59.000Z

347

Process and apparatus for preparing textured crystalline materials using anisotropy in the paramagnetic susceptibility  

DOE Patents (OSTI)

The present invention discloses a process and apparatus for forming textures in materials. The process comprises heating a material having an anisotropy in the paramagnetic or diamagnetic susceptibility within a magnetic field. The material is heated to a temperature approaching its melting point while a magnetic field of at least 10[sup 4]Oe is simultaneously applied. The process and apparatus produce highly textured bulk and elongated materials with high current densities below critical superconducting temperatures. 6 figs.

Holloway, A.

1992-01-07T23:59:59.000Z

348

2598 IEEE TRANSACTIONS ON MAGNETICS, VOL. 38, NO. 5, SEPTEMBER 2002 Interparticle Interactions in Annealed FePt  

E-Print Network (OSTI)

are also known to be permanent magnetic materials [5]. The energy products of hard­soft exchange coupled Fe for producing hard magnetic nanocomposites. Index Terms--Exchange coupling, FePt nanoparticles, magneti- zation offer a novel and convenient approach for producing permanent magnetic materials. However, to reach

Wang, Zhong L.

349

Argonne CNM Highlight: Biofunctionalized magnetic-vortex microdiscs for  

NLE Websites -- All DOE Office Websites (Extended Search)

Biofunctionalized magnetic-vortex microdiscs for targeted cancer-cell destruction Biofunctionalized magnetic-vortex microdiscs for targeted cancer-cell destruction Magnetic microdisks Reflection optical microscope image of a dried suspension of the discs prepared via magnetron sputtering and optical lithography. Magnetic spin vortex Model of magnetic-vortex spin distribution in a disc. Users from Argonne's Materials Science Division and University of Chicago's Pritzker School of Medicine, working collaboratively on a user science project with CNM's Nanobio Interfaces Group, have discovered that nanostructured magnetic materials offer exciting avenues for probing cell mechanics, activating mechanosensitive ion channels, and advancing potential cancer therapies. Their new report describes an approach based on interfacing cells with lithographically defined microdiscs (1-micron

350

System Cost Analysis for an Interior Permanent Magnet Motor  

SciTech Connect

The objective of this program is to provide an assessment of the cost structure for an interior permanent magnet ('IPM') motor which is designed to meet the 2010 FreedomCAR specification. The program is to evaluate the range of viable permanent magnet materials for an IPM motor, including sintered and bonded grades of rare earth magnets. The study considers the benefits of key processing steps, alternative magnet shapes and their assembly methods into the rotor (including magnetization), and any mechanical stress or temperature limits. The motor's costs are estimated for an annual production quantity of 200,000 units, and are broken out into such major components as magnetic raw materials, processing and manufacturing. But this is essentially a feasibility study of the motor's electromagnetic design, and is not intended to include mechanical or thermal studies as would be done to work up a selected design for production.

Peter Campbell

2008-08-01T23:59:59.000Z

351

Patch antennas with new artificial magnetic layers  

E-Print Network (OSTI)

A new type of high-impedance surfaces (HIS) has been introduced by C.R. Simovski et al. recently. In this paper, we propose to use such layers as artificial magnetic materials in the design of patch antennas. The new HIS is simulated and patch antennas partially filled by these composite layers are measured in order to test how much the antenna dimensions can be reduced. In order to experimentally investigate the frequency behavior of the material, different sizes of the patches are designed and tested with the same material layer. Also the height of the patch is changed in order to find the best possible position for minimizing the antenna size. This composite layer of an artificial magnetic material has made the antenna smaller while keeping the bandwidth characteristics of the antenna about the same. About 40% of size reduction has been achieved.

M. Ermutlu; C. R. Simovski; M. Karkainen; P. Ikonen; A. A. Sochava; S. A. Tretyakov

2005-04-11T23:59:59.000Z

352

Quadrupole magnets measurement  

SciTech Connect

A rotating coil setup is designed for quadrupole magnet measurement at the Accelerator Test Facility (ATF); Hall probe measurement was also performed for one of each type of quadrupole magnet. Both mechanical and magnetic properties of the quadrupole magnets were measured, the results are reported here. 5 refs., 12 figs., 12 tabs.

Wang, Xijie (California Univ., Los Angeles, CA (USA). Center for Advanced Accelerators Physics); Sylvester, C. (Brookhaven National Lab., Upton, NY (USA))

1991-01-01T23:59:59.000Z

353

Magnetic Imaging Wolfgang Kuch  

E-Print Network (OSTI)

Magnetic Imaging Wolfgang Kuch Freie Universit¨at Berlin, Institut f¨ur Experimentalphysik, Arnimallee 14, 14195 Berlin, Germany kuch@physik.fu-berlin.de Abstract. Imaging of magnetic domains has- ern techniques is used nowadays routinely for magnetic imaging of magnetic ma- terials

Kuch, Wolfgang

354

Magnetism in Nanocrystalline Gold  

Science Journals Connector (OSTI)

Magnetism in Nanocrystalline Gold ... Bridging the current gap in experimental study of magnetism in bare gold nanomaterials, we report here on magnetism in gold nanocrystalline films produced by cluster deposition in the aggregate form that can be considered as a crossover state between a nanocluster and a continuous film. ... gold; nanocrystalline film; magnetism; cluster deposition; SQUID magnetometry ...

Vladimir Tuboltsev; Alexander Savin; Alexandre Pirojenko; Jyrki Räisänen

2013-07-07T23:59:59.000Z

355

Magnetism of spiral galaxies  

Science Journals Connector (OSTI)

... magnetic fields of spiral galaxies has taken a special place in the study of cosmic magnetism, but magnetic fields are a universal property of all galactic-type objects, as is ... . The past ten years have been notable for rapid, qualitative progress in understanding the magnetism of spiral galaxies, a result of both theoretical and observational developments. A few decades ...

Alexander Ruzmaikin; Dmitry Sokoloff; Anvar Shukurov

1988-11-24T23:59:59.000Z

356

Magnetism in microquasars  

Science Journals Connector (OSTI)

...Lynden-Bell, E. R. Priest and N. O. Weiss Magnetism in microquasars I. F. Mirabel Centre...binaries|magnetic field|plasma physics| Magnetism in microquasars By I. F. Mirabel Centre...Trans. R. Soc. Lond. A (2000) Magnetism in microquasars 843 At rst glance it...

2000-01-01T23:59:59.000Z

357

Early History of Magnetism  

Science Journals Connector (OSTI)

... 2, Dr. J. B. Kramer read a paper on “The Early History of Magnetism”, in which he discussed the various accounts of the first discovery of a magnet ... accounts of the first discovery of a magnet, and the development of the science of magnetism down to A.D. 1600. His remarks were divided into five sections, the ...

1932-03-19T23:59:59.000Z

358

Intermediate wavelength magnetic anomalies over ocean basins  

SciTech Connect

We have examined three very long magnetic field profiles taken over ocean basins for the presence of intermediate wavelength magnetic anomalies. One profile was from the Atlantic Ocean in the Transatlantic Geotraverse area, one ran along latitude 35/sup 0/S in the SE Pacific, and one ran along 150/sup 0/W in the Pacific. All three profiles show the presence of intermediate wavelength (65--1500 km) magnetic anomalies generated in the crust or upper mantle. The analysis of magnetic field power spectra shows that the core field becomes unimportant at about a wavelength of 1500 km. Sea floor spreading anomalies should produce a maximum in power at about a wavelength of 65 km. Between these two wavelengths there should be a minimum in power which is not seen on observed records. Inverting the anomalous field to obtain some idea of the magnetization necessary to explain these intermediate wavelength magnetic anomalies shows that values of magnetization in excess of 1 A m/sup -1/ are needed if the magnetized layer is as thick as the ocean crust. Alternatively, rather large thicknesses of upper mantle material with lower intensities of magnetization need to be used. The reason why such magnetization variations exist is not known. It can be shown that upward continuation of the magnetic anomaly signature to an altitude of 350 km (about the perihelion altitude of MAGSAT) will produce anomalies up to 10 nT in amplitude. These should be capable of being seen by MAGSAT, and thus allow us to determine the spatial arrangement of the intermediate wavelength anomalies and hence, hopefully, a clue as to their origin.

Harrison, C.G.A.; Carle, H.M.

1981-12-10T23:59:59.000Z

359

Dynamic flying characteristics of an air bearing slider over a disk with grooves and distribution of material properties  

Science Journals Connector (OSTI)

Bit-patterned media (BPM) consisting of land parts for read/writing and grooves, which are almost filled with non-magnetic materials to prevent magnetic interference between recording bits, are considered to be p...

Shigehisa Fukui; Atsusi Oono; Hiroshige Matsuoka

2013-09-01T23:59:59.000Z

360

Interface structures in FePtFe3Pt hard-soft exchange-coupled magnetic nanocomposites  

E-Print Network (OSTI)

Interface structures in FePtÃ?Fe3Pt hard-soft exchange-coupled magnetic nanocomposites Jing Li with sizes 10 nm. This ensures the effective exchange coupling of magnetically hard and soft phases. High magnetic materials, the performance of conventional bulk permanent magnetic ma- terials is limited by its

Liu, J. Ping

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


361

Modeling bubbles and droplets in magnetic fluids Mark S. Korlie, Arup Mukherjee, Bogdan G. Nita, John G.  

E-Print Network (OSTI)

and linear magnetic material are assumed and uniform imposed magnetic fields are considered, although of vertical fields, due to a combination of elongation along the field lines and the fluid dynamics. In both cases, #12;Modeling bubbles and droplets in magnetic fluids 2 an imposed magnetic field, even

Yecko, Philip

362

Questions and Answers - Why is a non-permanent, but long lasting, magnet  

NLE Websites -- All DOE Office Websites (Extended Search)

Which jobs use electromagnets? Which jobs use electromagnets? Previous Question (Which jobs use electromagnets?) Questions and Answers Main Index Next Question (Can you turn something into a magnet by banging on it in a specific way?) Can you turn something into a magnetby banging on it in a specific way? Why is a non-permanent, but long lasting, magnet called a permanent magnet? Permanent magnets are magnets that you don't have to use energy to make them magnetic. Some types of permanent magnets, relative to the length of lives of humans, are pretty close to permanent. They decay slowly, but they do decay. When most of the magnetic domains in a material align in one direction you can call that a magnet. It helps if you can imagine a magnet as being made up of a bunch of little magnets. Each one has tiny North and

363

Method for forming materials  

DOE Patents (OSTI)

A material-forming tool and a method for forming a material are described including a shank portion; a shoulder portion that releasably engages the shank portion; a pin that releasably engages the shoulder portion, wherein the pin defines a passageway; and a source of a material coupled in material flowing relation relative to the pin and wherein the material-forming tool is utilized in methodology that includes providing a first material; providing a second material, and placing the second material into contact with the first material; and locally plastically deforming the first material with the material-forming tool so as mix the first material and second material together to form a resulting material having characteristics different from the respective first and second materials.

Tolle, Charles R. (Idaho Falls, ID); Clark, Denis E. (Idaho Falls, ID); Smartt, Herschel B. (Idaho Falls, ID); Miller, Karen S. (Idaho Falls, ID)

2009-10-06T23:59:59.000Z

364

Method to manufacture bit patterned magnetic recording media  

DOE Patents (OSTI)

A method to increase the storage density on magnetic recording media by physically separating the individual bits from each other with a non-magnetic medium (so-called bit patterned media). This allows the bits to be closely packed together without creating magnetic "cross-talk" between adjacent bits. In one embodiment, ferromagnetic particles are submerged in a resin solution, contained in a reservoir. The bottom of the reservoir is made of piezoelectric material.

Raeymaekers, Bart; Sinha, Dipen N

2014-05-13T23:59:59.000Z

365

Spin microscope based on optically detected magnetic resonance  

DOE Patents (OSTI)

The invention relates to scanning magnetic microscope which has a photoluminescent nanoprobe implanted in the tip apex of an atomic force microscope (AFM), a scanning tunneling microscope (STM) or a near-field scanning optical microscope (NSOM) and exhibits optically detected magnetic resonance (ODMR) in the vicinity of unpaired electron spins or nuclear magnetic moments in the sample material. The described spin microscope has demonstrated nanoscale lateral resolution and single spin sensitivity for the AFM and STM embodiments.

Berman, Gennady P. (Los Alamos, NM); Chernobrod, Boris M. (Los Alamos, NM)

2007-12-11T23:59:59.000Z

366

Spin microscope based on optically detected magnetic resonance  

DOE Patents (OSTI)

The invention relates to scanning magnetic microscope which has a photoluminescent nanoprobe implanted in the tip apex of an atomic force microscope (AFM), a scanning tunneling microscope (STM) or a near-field scanning optical microscope (NSOM) and exhibits optically detected magnetic resonance (ODMR) in the vicinity of unpaired electron spins or nuclear magnetic moments in the sample material. The described spin microscope has demonstrated nanoscale lateral resolution and single spin sensitivity for the AFM and STM embodiments.

Berman, Gennady P. (Los Alamos, NM); Chernobrod, Boris M. (Los Alamos, NM)

2010-06-29T23:59:59.000Z

367

Spin microscope based on optically detected magnetic resonance  

DOE Patents (OSTI)

The invention relates to scanning magnetic microscope which has a photoluminescent nanoprobe implanted in the tip apex of an atomic force microscope (AFM), a scanning tunneling microscope (STM) or a near-field scanning optical microscope (NSOM) and exhibits optically detected magnetic resonance (ODMR) in the vicinity of impaired electron spins or nuclear magnetic moments in the sample material. The described spin microscope has demonstrated nanoscale lateral resolution and single spin sensitivity for the AFM and STM embodiments.

Berman, Gennady P. (Los Alamos, NM); Chernobrod, Boris M. (Los Alamos, NM)

2009-11-10T23:59:59.000Z

368

Spin microscope based on optically detected magnetic resonance  

DOE Patents (OSTI)

The invention relates to scanning magnetic microscope which has a photoluminescent nanoprobe implanted in the tip apex of an atomic force microscope (AFM), a scanning tunneling microscope (STM) or a near-field scanning optical microscope (NSOM) and exhibits optically detected magnetic resonance (ODMR) in the vicinity of unpaired electron spins or nuclear magnetic moments in the sample material. The described spin microscope has demonstrated nanoscale lateral resolution and single spin sensitivity for the AFM and STM embodiments.

Berman, Gennady P. (Los Alamos, NM); Chernobrod, Boris M. (Los Alamos, NM)

2009-10-27T23:59:59.000Z

369

Wafer-Scale Synthesis of Monodisperse Synthetic Magnetic Multilayer Nanorods  

Science Journals Connector (OSTI)

Wafer-Scale Synthesis of Monodisperse Synthetic Magnetic Multilayer Nanorods ... †Department of Materials Science and Engineering, ‡Department of Mechanical Engineering, and §Department of Electrical Engineering, Stanford University, Stanford, California 94305, United States ...

Mingliang Zhang; Daniel J. B. Bechstein; Robert J. Wilson; Shan X. Wang

2013-12-12T23:59:59.000Z

370

Solar nebula magnetic fields recorded in the Semarkona meteorite  

E-Print Network (OSTI)

Magnetic fields are proposed to have played a critical role in some of the most enigmatic processes of planetary formation by mediating the rapid accretion of disk material onto the central star and the formation of the ...

Fu, Roger Rennan

371

Thin magnetic crystals are path to ferromagnetic graphene | ornl...  

NLE Websites -- All DOE Office Websites (Extended Search)

Functional Materials for Energy Thin magnetic crystals are path to ferromagnetic graphene January 23, 2015 The crystal structure of CrI3 includes hexagonal nets formed by Cr atoms...

372

Manganese-Based Magnets: Manganese-Based Permanent Magnet with 40 MGOe at 200°C  

SciTech Connect

REACT Project: PNNL is working to reduce the cost of wind turbines and EVs by developing a manganese-based nano-composite magnet that could serve as an inexpensive alternative to rare-earth-based magnets. The manganese composite, made from low-cost and abundant materials, could exceed the performance of today’s most powerful commercial magnets at temperature higher than 200°C. Members of PNNL’s research team will leverage comprehensive computer high-performance supercomputer modeling and materials testing to meet this objective. Manganese-based magnets could withstand higher temperatures than their rare earth predecessors and potentially reduce the need for any expensive, bulky engine cooling systems for the motor and generator. This would further contribute to cost savings for both EVs and wind turbines.

None

2012-01-01T23:59:59.000Z

373

Polarized neutron diffraction at a spallation source for magnetic studies  

Science Journals Connector (OSTI)

The first results from polarized neutron diffraction experiments on a time-of-flight instrument at a spallation source are reported. Higher neutron beam flux and efficient spin polarization at the neutron beamline enable in situ studies of phenomena contributing to field-induced magnetization in materials including magnetic shape memory alloys.

Pramanick, A.

2012-09-01T23:59:59.000Z

374

New approaches to thermoelectric cooling effects in magnetic fields  

SciTech Connect

The authors review thermoelectric effects in a magnetic field at a phenomenological level. Discussions of the limiting performance and problems with its computation for both Peltier and Ettingshausen coolers are presented. New principles to guide the materials scientists are discussed for magnetic effects, and a brief review of the subtle measurement problems is presented.

Migliori, A.; Darling, T.W.; Freibert, F. [and others

1997-05-01T23:59:59.000Z

375

Improved Magnetic Fusion Energy Economics Via Massive Resistive Electromagnets  

E-Print Network (OSTI)

for magnetic fusion reactors and instead using resistive magnet designs based on cheap copper or aluminum maintenance cost To put the capital cost issue into perspective, consider the following comparison, which incorporate niobium, a rare and expensive material compared to copper or aluminum. In addition to the direct

376

Linear Collider Final Focus Magnet Construction | Superconducting Magnet  

NLE Websites -- All DOE Office Websites (Extended Search)

Single Strand Superconductor Windings Single Strand Superconductor Windings Initial direct wind quad coils were constructed using 13 mil diameter single strand wire. This wire provides the smallest coil patterns possible, with quad coils wound easily onto .75 inch (19mm) diameter support tubes. The 13mil diameter superconductor gives the smallest coils possible, the penalty being higher inductance and smaller transfer function, but allowing lower operational currents. long model magnet Figure 1 shows the first one foot long model magnet constructed using the 11 axis ultrasonic wiring machine with 13 mil superconducting wire, the same wire previously used for the 472 RHIC Corrector packages. Existing stock materials were used in the construction, and the coil pattern was not optimized for harmonics, but to put as many coil turns onto the tube as

377

Magnetic Fields Analogous to electric field, a magnet  

E-Print Network (OSTI)

characteristic of elementary particles such as an electron #12;Magnetic Fields Magnetic field lines Direction;Magnetic Fields Magnetic field lines enter one end (south) of magnet and exit the other end (north) Opposite magnetic poles attract like magnetic poles repel #12;Like the electric field lines

Bertulani, Carlos A. - Department of Physics and Astronomy, Texas A&M University

378

Method and apparatus for measuring nuclear magnetic properties  

DOE Patents (OSTI)

A method for studying the chemical and structural characteristics of materials is disclosed. The method includes placement of a sample material in a high strength polarizing magnetic field to order the sample nuclei. The condition used to order the sample is then removed abruptly and the ordering of the sample allowed to evolve for a time interval. At the end of the time interval, the ordering of the sample is measured by conventional nuclear magnetic resonance techniques. 5 figs.

Weitekamp, D.P.; Bielecki, A.; Zax, D.B.; Zilm, K.W.; Pines, A.

1987-12-01T23:59:59.000Z

379

NEWTON's Material Science References  

NLE Websites -- All DOE Office Websites (Extended Search)

Material Science References Material Science References Do you have a great material science reference link? Please click our Ideas page. Featured Reference Links: Materials Research Society Materials Research Society The Materials Research Society has assembled many resources in its Materials Science Enthusiasts site. This site has information for the K-12 audience, general public, and materials science professionals. Material Science nanoHUB nanHUB.org is the place for nanotechnology research, education, and collaboration. There are Simulation Programs, Online Presentations, Courses, Learning Modules, Podcasts, Animations, Teaching Materials, and more. (Intened for high school and up) Materials Science Resources on the Web Materials Science Resources on the Web This site gives a good general introduction into material science. Sponsered by Iowa State, it talks about what material science is, ceramics and composites, and other topics.

380

Whirlpools on the Nanoscale Could Multiply Magnetic Memory  

NLE Websites -- All DOE Office Websites (Extended Search)

Whirlpools on the Nanoscale Could Whirlpools on the Nanoscale Could Multiply Magnetic Memory Whirlpools on the Nanoscale Could Multiply Magnetic Memory Print Tuesday, 21 May 2013 00:00 Research at the Advanced Light Source may lead to four-bit magnetic cells housed on nanoscale metal disks, instead of the two-bit magnetic domains of standard magnetic memories. In magnetic vortices, parallel electron spins point either clockwise or counterclockwise, while in their crowded centers the spins point either down or up. "From the scientist's point of view, magnetism is about controlling electron spin," says Peter Fischer of the Materials Sciences Division, who leads the work at beamline 6.1.2. Four orientations could provide multibits in a new kind of memory. The next step is to control the states independently and simultaneously.

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


381

HTS Magnet Program | Superconducting Magnet Division  

NLE Websites -- All DOE Office Websites (Extended Search)

HTS Magnet Program HTS Magnet Program High Temperature Superconductors (HTS) have the potential to revolutionize the field of superconducting magnets for particle accelerators, energy storage and medical applications. This is because of the fact that as compared to the conventional Low Temperature Superconductors (LTS), the critical current density (Jc ) of HTS falls slowly both: as a function of increasing field, and as a function of increasing temperature These unique properties can be utilized to design and build: HTS magnets that produce very high fields (20 - 50 T) HTS magnets that operate at elevated temperatures (20 - 77 K) This is a significant step forward over the convention LTS magnets which generally operate at a temperature of ~4 K and with field usually limited

382

Functional materials: electronics, information and sensors  

Science Journals Connector (OSTI)

Functional materials are those that have properties enabling them to preform a specific functional purpose, e.g. electrical, magnetic or optical. The rapid development of the technology of transistors and intergrated circuits will continue into the future with design incorporating new materials, notably gallium arsenide. Silica glass is finding increasing application in photonics, light emitting diodes and optical fibres for telephone cables. Optical-fibre technology depends on reliable and durable lasers which now use compound semiconductors such as indium-gallium-arsenide phosphide. It is anticipated that new materials application (indium-gallium-arsenide phosphide) will contribute towards progress in photovoltaics. Interest in superconducting material has heightened during 1980s with the promise that high-temperature superconductivity offers for more-efficient power generation and transmission. In future advantage will come from developing economic and reliable ways of producing functional materials to meet increasing demand.

Merton C. Flemings

1990-01-01T23:59:59.000Z

383

New developments in loudspeaker materials  

Science Journals Connector (OSTI)

Perhaps the drive behind a number of important new materials developments for speakers was the compact disc. The CD brought wide dynamic range with extended bass response into the home and car and ‘‘digital?ready speakers’’ have become more than just a marketing pitch. How are speaker engineers increasing excursion thermal power handling and maintaining performance characteristics at higher sound levels while improving reliability? Specific solutions such as carbon fiber and Kevlar woven and nonwoven composite cones new cone forming technologies injection molded adhesiveless suspension surrounds thermally conductiveadhesives thermally (but nonelectrically) conductive voice coil formers high?temperature voice coil wire insulation and adhesives a new magnetic geometry for high?excursion linear travel ferrofluids for woofers high?heat emmisivity plating techniques and other fabriction and materials solutions will be briefly discussed. Advances in materials extend to enclosure materials and a brief survey of developments in this related field will be mentioned. Additionally test and measurement procedures to objectively quantify these enhancements will be touched upon.

Michael A. Klasco

1995-01-01T23:59:59.000Z

384

Magnetic Switching under Pressure | Advanced Photon Source  

NLE Websites -- All DOE Office Websites (Extended Search)

Revealing the Secrets of Chemical Bath Deposition Revealing the Secrets of Chemical Bath Deposition DNA Repair Protein Caught in the Act of Molecular Theft Velcro for Nanoparticles A Molecular Fossil Ultrafast Imaging of Electron Waves in Graphene Science Highlights Archives: 2013 | 2012 | 2011 | 2010 2009 | 2008 | 2007 | 2006 2005 | 2004 | 2003 | 2002 2001 | 2000 | 1998 | Subscribe to APS Science Highlights rss feed Magnetic Switching under Pressure DECEMBER 2, 2010 Bookmark and Share A schematic representation of the pressure-induced magnetic switching effect. The colored images highlight the direction of the magnetic orbital (grey plane) for the copper centers (green balls: copper, blue: nitrogen, red: oxygen/water, yellow: fluoride). A material's properties are a critical factor in the way that material

385

Effect of the size of GBCO-Ag secondary magnet on the static forces performance of linear synchronous motors  

E-Print Network (OSTI)

Bulk high temperature superconductor magnets (HTSM) have a higher flux-generating capability compared to conventional permanent magnets (PMs). These materials potentially can be used in high temperature superconducting (HTS) linear synchronous...

Zheng, Jun; Shi, Yunhua; He, Dabo; Jing, Hailian; Li, Jing; Deng, Zigang; Wang, Suyu; Wang, Jiasu; Cardwell, David A.

2014-01-01T23:59:59.000Z

386

Educational Material Science Games  

NLE Websites -- All DOE Office Websites (Extended Search)

Material Science Games Material Science Games Do you have a great material science game? Please click our Ideas page. Featured Games: >KS2 Bitsize BBC - Materials KS2 Bitsize BBC - Materials Sponsored by the BBC, K2S Bitsize offers tons of free online science games including a section on materials. Learn about the changes in materials, changing states, heat, rocks, soils, solids, liquids, gases, and much more. Science Kids - Properties of Materials Science Kids - Properties of Materials Learn about the properties of materials as you experiment with a variety of objects in this great science activity for kids. Discover the interesting characteristics of materials; are they flexible, waterproof, strong or transparent? Characteristics of Materials - BBC Schools Characteristics of Materials - BBC Schools

387

Variable-field permanent magnet dipole  

SciTech Connect

A new concept for a variable-field permanent-magnet dipole (VFPMD) has been designed, fabricated, and tested at Los Alamos. The VFPMD is a C-shaped sector magnet with iron poles separated by a large block of magnet material (SmCo). The central field can be continuously varied from 0.07 T to 0.3 T by moving an iron shunt closer or further away from the back of the magnet. The shunt is specially shaped to make the dependence of the dipole field strength on the shunt position as linear as possible. The dipole has a 2.8 cm high by 8 cm wide aperture with {approximately}10 cm long poles.

Barlow, D.B.; Kraus, R.H. Jr.; Meyer, R.E.

1993-10-01T23:59:59.000Z

388

No ms de maro/2014 o Professor Dr. Christian Mller, da Technische Universitt Chemnitz -Alemanha, apresentou palestra sobre SMART MATERIALS FOR SMART  

E-Print Network (OSTI)

- Alemanha, apresentou palestra sobre SMART MATERIALS FOR SMART SENSORS, cujo resumo segue abaixo sensors, and optical sensors. In addition, with less than 1% filler material conductive nanomaterial developments of multifunctional materials including carbon nanomaterials and flexible magnetic nanomembranes

Paraná, Universidade Federal do

389

Tamper resistant magnetic stripes  

DOE Patents (OSTI)

This invention relates to a magnetic stripe comprising a medium in which magnetized particles are suspended and in which the encoded information is recorded by actual physical rotation or alignment of the previously magnetized particles within the flux reversals of the stripe which are 180.degree. opposed in their magnetic polarity. The magnetized particles are suspended in a medium which is solid, or physically rigid, at ambient temperatures but which at moderately elevated temperatures, such as 40.degree. C., is thinable to a viscosity permissive of rotation of the particles therein under applications of moderate external magnetic field strengths within acceptable time limits.

Naylor, Richard Brian (Albuquerque, NM); Sharp, Donald J. (Albuquerque, NM)

1999-01-01T23:59:59.000Z

390

Method and apparatus for separating gases based on electrically and magnetically enhanced monolithic carbon fiber composite sorbents  

DOE Patents (OSTI)

A method for separating gases or other fluids involves placing a magnetic field on a monolithic carbon fiber composite sorption material to more preferentially attract certain gases or other fluids to the sorption material to which a magnetic field is applied. This technique may be combined with the known pressure swing adsorption'' technique utilizing the same sorption material. 1 fig.

Judkins, R.R.; Burchell, T.D.

1999-07-20T23:59:59.000Z

391

Method and apparatus for separating gases based on electrically and magnetically enhanced monolithic carbon fiber composite sorbents  

DOE Patents (OSTI)

A method for separating gases or other fluids involves placing a magnetic field on a monolithic carbon fiber composite sorption material to more preferentially attract certain gases or other fluids to the sorption material to which a magnetic field is applied. This technique may be combined with the known "pressure swing adsorption" technique utilizing the same sorption material.

Judkins, Roddie R. (9917 Rainbow Dr., Knoxville, TN 37922); Burchell, Timothy D. (109 Greywood Pl., Oak Ridge, TN 37830)

1999-01-01T23:59:59.000Z

392

Magnet Technology for Power Converters: Nanocomposite Magnet Technology for High Frequency MW-Scale Power Converters  

SciTech Connect

Solar ADEPT Project: CMU is developing a new nanoscale magnetic material that will reduce the size, weight, and cost of utility-scale PV solar power conversion systems that connect directly to the grid. Power converters are required to turn the energy that solar power systems create into useable energy for the grid. The power conversion systems made with CMU’s nanoscale magnetic material have the potential to be 150 times lighter and significantly smaller than conventional power conversion systems that produce similar amounts of power.

None

2012-02-27T23:59:59.000Z

393

Magneto-Thermo-Mechanical Response and Magneto-Caloric Effect in Magnetic Shape Memory Alloys  

E-Print Network (OSTI)

Ni-Co-Mn-In system is a new type of magnetic shape memory alloys (MSMAs) where the first order structural and magnetic phase transitions overlap. These materials can generate large reversible shape changes due to magnetic-field-induced martensitic...

Yegin, Cengiz

2012-07-16T23:59:59.000Z

394

Migration and reorientation of grain boundaries in Zn bicrystals during annealing in a high magnetic field  

E-Print Network (OSTI)

. � 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved. Keywords: Magnetic magnetic field A.D. Sheikh-Ali a,*,1 , D.A. Molodov b , H. Garmestani a a Laboratory for Micromechanics of Materials, FSU-National High Magnetic Field Laboratory and FAMU-FSU College of Engineering, 1800 East Paul

Garmestani, Hamid

395

Room temperature ferromagnetism in a phthalocyanine based carbon material  

SciTech Connect

We report on a simple method to fabricate a magnetic carbon material that contains nitrogen-coordinated transition metals and has a large magnetic moment. Highly chlorinated iron phthalocyanine was used as building blocks and potassium as a coupling reagent to uniformly disperse nitrogen-coordinated iron atoms on the phthalocyanine based carbon material. The iron phthalocyanine based carbon material exhibits ferromagnetic properties at room temperature and the ferromagnetic phase transition occurs at T{sub c}?=?490?±?10?K. Transmission electron microscopy observation, X-ray diffraction analysis, and the temperature dependence of magnetization suggest that the phthalocyanine molecules form three-dimensional random networks in the iron phthalocyanine based carbon material.

Honda, Z., E-mail: honda@fms.saitama-u.ac.jp; Sato, K.; Sakai, M.; Fukuda, T.; Kamata, N. [Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama 338-8570 (Japan); Hagiwara, M.; Kida, T. [KYOKUGEN (Center for Quantum Science and Technology under Extreme Conditions), Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531 (Japan)

2014-02-07T23:59:59.000Z

396

2-3 High Field Magnetic Resonance Facility  

NLE Websites -- All DOE Office Websites (Extended Search)

HFMRF Overview HFMRF Overview High Field Magnetic Resonance Facility A significant portion of research conducted in the High Field Magnetic Resonance Facility (HFMRF) focuses on developing a fundamental, molecular-level understanding of biochemi- cal and biological systems and their response to environmental effects. A secondary focus is in materials science and catalysis and the chemical mechanisms and processes that operate in these areas. Resident and matrixed research staff within this facility offer expertise in the areas of structural biology, solid-state materials characterization, and magnetic resonance imaging (MRI) techniques. Instrumentation & Capabilities NMR * 900-MHz NMR (operational in 2004) * 800-MHz NMR * 750-MHz NMR * 600-MHz NMR (2 systems)

397

National High Magnetic Field Laboratory: An Introduction to Magnets...  

NLE Websites -- All DOE Office Websites (Extended Search)

resistive magnet is here at the Magnet Lab: It can generate a sustained magnetic field of 35 tesla. (Were not counting here our world-record hybrid magnet or the stronger,...

398

3D analysis of magnetization distribution magnetized by capacitor-discharge impulse magnetizer  

Science Journals Connector (OSTI)

Method for calculating the magnetization distribution magnetized by capacitor-discharge impulse magnetizer is expanded to 3D, and the calculated flux distribution is compared with measured one.

Norio Takahashi

2001-01-01T23:59:59.000Z

399

Spin and orbital magnetization loops obtained using magnetic Compton scattering  

SciTech Connect

We present an application of magnetic Compton scattering (MCS) to decompose a total magnetization loop into spin and orbital magnetization contributions. A spin magnetization loop of SmAl{sub 2} was measured by recording the intensity of magnetic Compton scattering as a function of applied magnetic field. Comparing the spin magnetization loop with the total magnetization one measured by a vibrating sample magnetometer, the orbital magnetization loop was obtained. The data display an anti-coupled behavior between the spin and orbital magnetizations and confirm that the orbital part dominates the magnetization.

Itou, M.; Sakurai, Y. [Japan Synchrotron Radiation Research Institute, SPring-8, Hyogo 679-5198 (Japan)] [Japan Synchrotron Radiation Research Institute, SPring-8, Hyogo 679-5198 (Japan); Koizumi, A. [Graduate School of Materials Science, University of Hyogo, Hyogo 678-1297 (Japan)] [Graduate School of Materials Science, University of Hyogo, Hyogo 678-1297 (Japan)

2013-02-25T23:59:59.000Z

400

Thermal to electricity conversion using thermal magnetic properties  

DOE Patents (OSTI)

A system for the generation of Electricity from Thermal Energy using the thermal magnetic properties of a Ferromagnetic, Electrically Conductive Material (FECM) in one or more Magnetic Fields. A FECM is exposed to one or more Magnetic Fields. Thermal Energy is applied to a portion of the FECM heating the FECM above its Curie Point. The FECM, now partially paramagnetic, moves under the force of the one or more Magnetic Fields. The movement of the FECM induces an electrical current through the FECM, generating Electricity.

West, Phillip B [Idaho Falls, ID; Svoboda, John [Idaho Falls, ID

2010-04-27T23:59:59.000Z

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


401

Recent lunar magnetism  

E-Print Network (OSTI)

The magnetization of young lunar samples (magnetic fields (e.g. core dynamo and long-lived impact plasma fields) have not been present within the last 1.5 Ga. To better ...

Buz, Jennifer

2011-01-01T23:59:59.000Z

402

Metallic Magnetic Hetrostructures  

E-Print Network (OSTI)

This work studied sputter deposited conventional spin valves (SV) and related structures. In SV layered structures, two ferromagnetic layers are separated by a non-magnetic spacer. Under an external magnetic field, the relative orientation...

Leung, Chi Wah

403

Plasma Magnetic Insulation  

Science Journals Connector (OSTI)

29 June 1987 research-article Plasma Magnetic Insulation B. B. Kadomtsev Theoretically the strong magnetic field of a tokamak should confine electrons and ions in a high-temperature...

1987-01-01T23:59:59.000Z

404

Magnetic assisted statistical assembly  

E-Print Network (OSTI)

The objective of this thesis is to develop a process using magnetic forces to assemble micro-components into recesses on silicon based integrated circuits. Patterned SmCo magnetic thin films at the bottom of recesses are ...

Cheng, Diana I

2008-01-01T23:59:59.000Z

405

Magnetic Nanoparticle NANOMATERIALS  

E-Print Network (OSTI)

Magnetic Nanoparticle Metrology NANOMATERIALS We are developing best practice metrology for characterization of magnetic nanoparticle systems (e.g. blocking temperature, anisotropy, property distributions, T nanoparticles and provide guidelines to the FDA to properly compare systems when approving nanoparticle systems

406

Uranium Monochalcogenides: Magnetic Form Factor and Magnetic Neutron Scattering  

Science Journals Connector (OSTI)

Fig. R.66. UY. (A) Magnetic form factor. The radial ?j i? integrals, which contribute to the neutron magnetic fo...

R. Tro?

2009-01-01T23:59:59.000Z

407

LHC Magnet Program | Superconducting Magnet Division  

NLE Websites -- All DOE Office Websites (Extended Search)

Magnet Program Magnet Program The Superconducting Magnet Division is building a number of dipole magnets for the Large Hadron Collider (LHC), which is now under construction at CERN in Geneva, Switzerland. Scheduled to begin operation in 2007, this machine will collide beams of protons with the unprecedented energy of 7 TeV per beam to explore the nature of matter at its most basic level (RHIC can collide beams of protons with energies of 0.25 TeV, but is mostly used to collide heavy ions with energies of 0.1 TeV per nucleon). The magnets are being built as part of the US program, recommended by the High Energy Physics Advisory Panel (HEPAP) and approved by Congress, to contribute to the construction and, later, use of that frontier machine by the US high energy physics community. Fermi National Accelerator Laboratory (FNAL) and

408

Advanced Materials | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Research Areas Research Areas Research Highlights Facilities and Capabilities Science to Energy Solutions News & Awards Events and Conferences Supporting Organizations Directionally Solidified Materials Using high-temperature optical floating zone furnace to produce monocrystalline molybdenum alloy micro-pillars Home | Science & Discovery | Advanced Materials Advanced Materials | Advanced Materials SHARE ORNL has the nation's most comprehensive materials research program and is a world leader in research that supports the development of advanced materials for energy generation, storage, and use. We have core strengths in three main areas: materials synthesis, characterization, and theory. In other words, we discover and make new materials, we study their structure,

409

MATERIALS TRANSFER AGREEMENT  

NLE Websites -- All DOE Office Websites (Extended Search)

MTAXX-XXX 1 MATERIAL TRANSFER AGREEMENT for Manufacturing Demonstration Facility and Carbon Fiber Technology Facility In order for the RECIPIENT to obtain materials, the RECIPIENT...

410

Material Point Methods  

NLE Websites -- All DOE Office Websites (Extended Search)

Material Point Methods and Multiphysics for Fracture and Multiphase Problems Joseph Teran, UCLA and Alice Koniges, LBL Contact: jteran@math.ucla.edu Material point methods (MPM)...

411

Materials | Department of Energy  

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

Materials Materials 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Vehicle Technologies Plenary...

412

Energy Materials & Processes | EMSL  

NLE Websites -- All DOE Office Websites (Extended Search)

in catalysts and energy materials needed to design new materials and systems for sustainable energy applications. By facilitating the development and rapid dissemination...

413

EMSL - Energy Materials & Processes  

NLE Websites -- All DOE Office Websites (Extended Search)

in catalysts and energy materials needed to design new materials and systems for sustainable energy applications. By facilitating the development and rapid dissemination...

414

Los Alamos achieves world-record pulsed magnetic field  

NLE Websites -- All DOE Office Websites (Extended Search)

Los Alamos achieves world-record pulsed magnetic field Los Alamos achieves world-record pulsed magnetic field Los Alamos achieves world-record pulsed magnetic field Researchers have set a new world record for the strongest magnetic field produced by a nondestructive magnet. August 23, 2011 Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials. Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials.

415

Bioinspired synthesis of magnetic nanoparticles  

SciTech Connect

The synthesis of magnetic nanoparticles has long been an area of active research. Magnetic nanoparticles can be used in a wide variety of applications such as magnetic inks, magnetic memory devices, drug delivery, magnetic resonance imaging (MRI) contrast agents, and pathogen detection in foods. In applications such as MRI, particle uniformity is particularly crucial, as is the magnetic response of the particles. Uniform magnetic particles with good magnetic properties are therefore required. One particularly effective technique for synthesizing nanoparticles involves biomineralization, which is a naturally occurring process that can produce highly complex nanostructures. Also, the technique involves mild conditions (ambient temperature and close to neutral pH) that make this approach suitable for a wide variety of materials. The term 'bioinspired' is important because biomineralization research is inspired by the naturally occurring process, which occurs in certain microorganisms called 'magnetotactic bacteria'. Magnetotactic bacteria use biomineralization proteins to produce magnetite crystals having very good uniformity in size and morphology. The bacteria use these magnetic particles to navigate according to external magnetic fields. Because these bacteria synthesize high quality crystals, research has focused on imitating aspects of this biomineralization in vitro. In particular, a biomineralization iron-binding protein found in a certain species of magnetotactic bacteria, magnetospirillum magneticum, AMB-1, has been extracted and used for in vitro magnetite synthesis; Pluronic F127 gel was used to increase the viscosity of the reaction medium to better mimic the conditions in the bacteria. It was shown that the biomineralization protein mms6 was able to facilitate uniform magnetite synthesis. In addition, a similar biomineralization process using mms6 and a shorter version of this protein, C25, has been used to synthesize cobalt ferrite particles. The overall goal of this project is to understand the mechanism of magnetite particle synthesis in the presence of the biomineralization proteins, mms6 and C25. Previous work has hypothesized that the mms6 protein helps to template magnetite and cobalt ferrite particle synthesis and that the C25 protein templates cobalt ferrite formation. However, the effect of parameters such as the protein concentration on the particle formation is still unknown. It is expected that the protein concentration significantly affects the nucleation and growth of magnetite. Since the protein provides iron-binding sites, it is expected that magnetite crystals would nucleate at those sites. In addition, in the previous work, the reaction medium after completion of the reaction was in the solution phase, and magnetic particles had a tendency to fall to the bottom of the medium and aggregate. The research presented in this thesis involves solid Pluronic gel phase reactions, which can be studied readily using small-angle x-ray scattering, which is not possible for the solution phase experiments. In addition, the concentration effect of both of the proteins on magnetite crystal formation was studied.

David, Anand

2009-05-26T23:59:59.000Z

416

Magnetic susceptibility in QCD  

E-Print Network (OSTI)

Magnetic susceptibility in the deconfined phase of QCD is calculated in a closed form using a recent general expression for the quark gas pressure in magnetic field. Quark selfenergies are entering the result via Polyakov line factors and ensure the total paramagnetic effect, increasing with temperature. A generalized form of magnetic susceptibility in nonzero magnetic field suitable for experimental and lattice measurements is derived, showing a good agreement with available lattice data.

V. D. Orlovsky; Yu. A. Simonov

2014-05-12T23:59:59.000Z

417

Magnetism Theory Group / POSTECH Magnetism Theory Group / POSTECH  

E-Print Network (OSTI)

Magnetism Theory Group / POSTECH #12;Magnetism Theory Group / POSTECH #12;Magnetism Theory Group / POSTECH #12;Magnetism Theory Group / POSTECH #12;Magnetism Theory Group / POSTECH J.H . Park et al. #12;'s of FeinCsm e tal The chargeandorbitalordering geom etryin YB a C o 2 O 5 S. K. Kwon etal .Magnetism Theory

Min, Byung Il

418

Advanced measurements and techniques in high magnetic fields  

SciTech Connect

This is the final report of a one-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). High magnetic fields present a unique environment for studying the electronic structure of materials. Two classes of materials were chosen for experiments at the national high Magnetic Field Laboratory at Los Alamos: highly correlated electron systems and semiconductors. Magnetotransport and thermodynamic experiments were performed on the renormalized ground states of highly correlated electron systems (such as heavy fermion materials and Kondo insulators) in the presence of magnetic fields that are large enough to disrupt the many-body correlations. A variety of optical measurements in high magnetic fields were performed on semiconductor heterostructures including GaAs/AlGaAs single heterojunctions (HEMT structure), coupled double quantum wells (CDQW), asymmetric coupled double quantum wells (ACDQW), multiple quantum wells and a CdTe single crystal thin film.

Campbell, L.J.; Rickel, D.G. [Los Alamos National Lab., NM (United States); Lacerda, A.H. [Florida State Univ., Tallahassee, FL (United States); Kim, Y. [Northeastern Univ., Boston, MA (United States)

1997-07-01T23:59:59.000Z

419

Chapter 6: Materials  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

: Materials : Materials Material Selection Sustainable Building Materials System Integration Issues | Chapter 6 Material Selection Materials The use of durable, attractive, and environmentally responsible building materials is a key element of any high-performance building effort. The use of natural and healthy materials contributes to the well-being of the occupants and to a feeling of connection with the bounty of the natural world. Many construction materials have significant environ- mental impacts from pollutant releases, habitat destruc- tion, and depletion of natural resources. This can occur during extraction and acquisition of raw materials, pro- "Then I say the Earth belongs to duction and manufacturing processes, and transporta- tion. In addition, some construction materials can harm

420

NEWTON's Material Science Videos  

NLE Websites -- All DOE Office Websites (Extended Search)

Material Science Videos Material Science Videos Do you have a great material science video? Please click our Ideas page. Featured Videos: University of Maryland - Material Science University of Maryland - Material Science The Department of Materials Science and Engineering offers a set of videos about various topics in material science to help students understand what material science is. Learn about plasma, polymers, liquid crystals and much more. LearnersTV.com - Material Science LearnersTV.com - Material Science LearnersTV.com offers a series of educational material science lectures that are available to the public for free. Learn about topics like polymers, non-crystalline solids, crystal geometry, phase diagrams, phase transformations and more. NanoWerk - Nanotechnology Videos NanoWerk - Nanotechnology Videos

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


421

RESEARCH: Argonne's Super Magnet  

Science Journals Connector (OSTI)

RESEARCH: Argonne's Super Magnet ... The world's largest superconducting magnet has been successfully built and operated by Argonne National Laboratory, at Argonne, Ill. ... The magnet will be part of Argonne's bubble chamber, also the world's largest, which should be completed on schedule this summer. ...

1969-02-03T23:59:59.000Z

422

Noble gas magnetic resonator  

DOE Patents (OSTI)

Precise measurements of a precessional rate of noble gas in a magnetic field is obtained by constraining the time averaged direction of the spins of a stimulating alkali gas to lie in a plane transverse to the magnetic field. In this way, the magnetic field of the alkali gas does not provide a net contribution to the precessional rate of the noble gas.

Walker, Thad Gilbert; Lancor, Brian Robert; Wyllie, Robert

2014-04-15T23:59:59.000Z

423

Magnetism in transition metals  

Science Journals Connector (OSTI)

By using the Hubbard tight-binding-type Hamiltonian and the cluster Bethe-lattice approximation we calculate for Fe the Curie temperature TC=2250 K and the temperature dependence of the magnetic moments and the magnetization. Moreover, we show how previous theories for itinerant magnets may be extended to include short-range spin correlations.

J. L. Morán-López; K. H. Bennemann; M. Avignon

1981-06-01T23:59:59.000Z

424

A Study in Magnetism  

Science Journals Connector (OSTI)

... this century, for the simple comprehensiveness and original beauty of his researches in electricity and magnetism; chiefly, perhaps, for his discovery of magneto-electricity—the kind of electricity that ... space surrounding a magnet was thrown into a peculiar condition by the presence of the magnetism. Two centuries previously another Englishman, as uniquely great if not greater, Dr. Gilbert ...

SILVANUS P. THOMPSON

1878-11-28T23:59:59.000Z

425

Energetic Materials Center Energetic Materials Center  

NLE Websites -- All DOE Office Websites (Extended Search)

experimental characterization of energetic material properties and reactions; and high-speed diagnostic instruments for measuring the chemical and physical processes that occur...

426

Magnetization dynamics of cobalt grown on graphene  

SciTech Connect

Ferromagnetic resonance (FMR) spin pumping is a rapidly growing field which has demonstrated promising results in a variety of material systems. This technique utilizes the resonant precession of magnetization in a ferromagnet to inject spin into an adjacent non-magnetic material. Spin pumping into graphene is attractive on account of its exceptional spin transport properties. This article reports on FMR characterization of cobalt grown on chemical vapor deposition graphene and examines the validity of linewidth broadening as an indicator of spin pumping. In comparison to cobalt samples without graphene, direct contact cobalt-on-graphene exhibits increased FMR linewidth—an often used signature of spin pumping. Similar results are obtained in Co/MgO/graphene structures, where a 1?nm MgO layer acts as a tunnel barrier. However, magnetometry, magnetic force microscopy, and Kerr microscopy measurements demonstrate increased magnetic disorder in cobalt grown on graphene, perhaps due to changes in the growth process and an increase in defects. This magnetic disorder may account for the observed linewidth enhancement due to effects such as two-magnon scattering or mosaicity. As such, it is not possible to conclude successful spin injection into graphene from FMR linewidth measurements alone.

Berger, A. J.; White, S. P.; Adur, R.; Pu, Y.; Hammel, P. C., E-mail: hammel@physics.osu.edu [Department of Physics, The Ohio State University, Columbus, Ohio 43210 (United States); Amamou, W. [Department of Physics and Astronomy, University of California, Riverside, California 92521 (United States); Kawakami, R. K. [Department of Physics, The Ohio State University, Columbus, Ohio 43210 (United States); Department of Physics and Astronomy, University of California, Riverside, California 92521 (United States)

2014-05-07T23:59:59.000Z

427

New approaches to thermoelectric cooling effects in magnetic fields  

SciTech Connect

The authors review thermoelectric effects in a magnetic field at a phenomenological level. Discussions of the limiting performance and problems with its computation for both Peltier and Ettingshausen coolers are presented. New principles are discussed to guide the materials scientist in the search for better Ettingshausen materials, and a brief review of the subtle measurement problems is presented.

Migliori, A.; Darling, T.W.; Freibert, F.; Trugman, S.A.; Moshopoulou, E. [Los Alamos National Lab., NM (United States); Sarrao, J.L. [Florida State Univ., Tallahassee, FL (United States)

1997-08-01T23:59:59.000Z

428

Full vector low-temperature magnetic measurements of geologic materials  

E-Print Network (OSTI)

the early history of the solar system. The assemblage ofas they pass by the Sun (at solar perigee) or as they enter

Feinberg, Joshua M; Solheid, Peter A; Swanson-Hysell, Nicholas L; Jackson, Mike J; Bowles, Julie A

2015-01-01T23:59:59.000Z

429

Boronic acid-modified magnetic materials for antibody purification  

Science Journals Connector (OSTI)

...several times with distilled water and then dispersed in 50 ml of...washed five times with distilled water and used for purification study. The second method involved...particles were washed with distilled water. The third method included the...

2014-01-01T23:59:59.000Z

430

Characterization of Magnetic Materials by Means of Neutron Scattering  

Science Journals Connector (OSTI)

The neutron is an elementary particle with a particular combination of properties that makes it uniquely versatile as a condensed matter probe. These properties are: (1) ...

G. Ehlers; F. Klose

2006-01-01T23:59:59.000Z

431

4 - Bulk high temperature superconductor (HTS) materials  

Science Journals Connector (OSTI)

Abstract: This chapter concentrates on bulk materials. A bulk superconductor is one in which the superconductor has been formed into a lump, usually cylindrically shaped, but can also be hexagonal, rectangular or even square. Bulk superconductors are typically 3–5 cm across and 1 cm thick. They have many uses but the principal one is as extremely compact high-field permanent magnets in superconducting machines. A 2.6 cm (RE)BCO puck has been magnetised to 17.24 T: this is an order of magnitude greater than the flux density available from a conventional permanent magnet. This chapter describes the materials, manufacturing process, magnetisation process and some examples of machines.

T. Coombs

2012-01-01T23:59:59.000Z

432

Planar Biphenyl-Bridged Biradicals as Building Blocks for the Design of Quantum Magnets  

Science Journals Connector (OSTI)

This organic biradical belongs to a family of materials that can be used as a building block for the design of new quantum magnets. ... This demonstrates the usefulness of these biradicals for generating new families of quantum magnets enabling to address fundamental aspects of quantum magnetism. ... This method effectively works for calcn. of J values and is reliable in characterizing the detailed magnetic properties of multi-nuclear metal complexes. ...

Evgeny A. Mostovich; Yulia Borozdina; Volker Enkelmann; Katarina Removi?-Langer; Bernd Wolf; Michael Lang; Martin Baumgarten

2011-12-01T23:59:59.000Z

433

Coated ceramic breeder materials  

DOE Patents (OSTI)

A breeder material for use in a breeder blanket of a nuclear reactor is disclosed. The breeder material comprises a core material of lithium containing ceramic particles which has been coated with a neutron multiplier such as Be or BeO, which coating has a higher thermal conductivity than the core material.

Tam, Shiu-Wing (Downers Grove, IL); Johnson, Carl E. (Elk Grove, IL)

1987-01-01T23:59:59.000Z

434

Dental Materials BIOMATERIALS  

E-Print Network (OSTI)

focus is on the development of two standard methods: one for a material's resistance to microleakage will quantify a significant portion of a material's ability to resist secondary caries. The methodsDental Materials BIOMATERIALS Our goal is to provide reference materials and clinically relevant

435

Hydrogen Compatibility of Materials  

Energy.gov (U.S. Department of Energy (DOE))

Presentation slides from the Energy Department webinar, Hydrogen Compatibility of Materials, held August 13, 2013.

436

Computational Chemical Materials Engineering  

E-Print Network (OSTI)

: Thermal barrier coatings, wear resistance coatings, radiation resistant materials · Materials for opticalHome Computational Chemical and Materials Engineering Tahir Cagin Chemical Engineering Department to understand behavior and properties of materials as a function of ­ Chemical constitution ­ Composition

437

Modeling and Characterization of the Magnetocaloric Effect in Ni2MnGa Materials  

SciTech Connect

Magnetic shape memory alloys have great promise as magneto-caloric effect refrigerant materials due to their combined magnetic and structural transitions. Computational and experimental research is reported on the Ni2MnGa material system. The magnetic states of this system have been explored using the Wang-Landau statistical approach in conjunction with the Locally Self-consistent Multiple-Scattering (LSMS) method to explore the magnetic states responsible for the magnet-caloric effect in this material. The effects of alloying agents on the transition temperatures of the Ni2MnGa alloy were investigated using differential scanning calorimetry (DSC) and superconducting quantum interference device (SQUID). Neutron scattering experiments were performed to observe the structural and magnetic phase transformations at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL) on alloys of Ni-Mn-Ga and Ni-Mn-Ga-Cu-Fe. Data from the observations are discussed in comparison with the computational studies.

Nicholson, Don M [ORNL; Odbadrakh, Khorgolkhuu [ORNL; Rios, Orlando [ORNL; Hodges, Jason P [ORNL; Ludtka, Gerard Michael [ORNL; Porter, Wallace D [ORNL; Sefat, A. S. [Oak Ridge National Laboratory (ORNL); Rusanu, Aurelian [ORNL; Evans III, Boyd Mccutchen [ORNL

2012-01-01T23:59:59.000Z

438

New directions in materials for thermomagnetic cooling  

SciTech Connect

We review thermoelectric effects in a magnetic field at a phenomenological level. Discussions of the difficulties in computing the limiting performance for both Peltier and Ettingshausen coolers are presented. New principles are discussed to guide the materials scientist in the search for better Ettingshausen materials. These principles are based on the tensor transport and solid state electronic properties of Bi{sub 1{minus}x}Sb{sub x} alloys. A brief review of the subtle measurement problems is presented. {copyright} {ital 1998 American Institute of Physics.}

Migliori, A.; Freibert, F.; Darling, T.W.; Sarrao, J.L.; Trugman, S.A.; Moshopoulou, E. [Thermal and Condensed Matter Physics, MS: K764, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

1998-01-01T23:59:59.000Z

439

Wireless sensor for detecting explosive material  

SciTech Connect

Disclosed is a sensor for detecting explosive devices. The sensor includes a ferromagnetic metal and a molecular recognition reagent coupled to the ferromagnetic metal. The molecular recognition reagent is operable to expand upon absorption of vapor from an explosive material such that the molecular recognition reagent changes a tensile stress upon the ferromagnetic metal. The explosive device is detected based on changes in the magnetic switching characteristics of the ferromagnetic metal caused by the tensile stress.

Lamberti, Vincent E; Howell, Jr., Layton N; Mee, David K; Sepaniak, Michael J

2014-10-28T23:59:59.000Z

440

Nuclear magnetic resonance offers new insights into Pu 239  

NLE Websites -- All DOE Office Websites (Extended Search)

Nuclear magnetic resonance offers new insights into Pu 239 Nuclear magnetic resonance offers new insights into Pu 239 Nuclear magnetic resonance offers new insights into Pu 239 Fingerprint of element found by LANL/Japanese team. May 29, 2012 How would the detonation of a nuclear energy source afffect an incoming asteroid? Georgios Koutroulakis and H. Yasuoka in the condensed-matter NMR lab at Los Alamos National Laboratory after having observed the magnetic resonance signal of Pu 239 for the first time. Get Expertise Scientist Eric Bauer Condensed Matter & Magnet Science Email Professor Hiroshi Yasuoka Japan Atomic Energy Agency "This discovery of the plutonium 239 magnetic resonance promises to revolutionize our understanding of plutonium solid state physics, chemistry, biology and materials science."

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


441

Vacuum properties of sintered SmCo/sub 5/ magnets  

SciTech Connect

There are many desirable applications of powerful, rare-earth permanent magnets made of sintered SmCo/sub 5/ material within vacuum systems. One application is the use of large numbers of SmCo/sub 5/ magnets to provide the undulating magnetic field in a free-electron-laser wiggler structure. Tests were conducted at Los Alamos to determine the suitability of SmCo/sub 5/ magnets in a vacuum environment of approx. 10/sup -6/ torr. The vacuum performances of the wiggler system, with and without the SmCo/sub 5/ magnets (having approx. 11% of the total surface area) installed, were essentially identical. These tests indicate that SmCo/sub 5/ magnets have good vacuum properties and are suitable for use in many vacuum systems.

Warren, R.W.; DePaula, R.F.; Hansborough, L.D.

1981-12-01T23:59:59.000Z

442

Magnetism in nanometer-thick magnetite  

Science Journals Connector (OSTI)

The oldest known magnetic material, magnetite, is of current interest for use in spintronics as a thin film. An open question is how thin can magnetite films be and still retain the robust ferrimagnetism required for many applications. We have grown 1-nm-thick magnetite crystals and characterized them in situ by electron and photoelectron microscopies including selected-area x-ray circular dichroism. Well-defined magnetic patterns are observed in individual nanocrystals up to at least 520 K, establishing the retention of ferrimagnetism in magnetite two unit cells thick.

Matteo Monti; Benito Santos; Arantzazu Mascaraque; Oscar Rodríguez de la Fuente; Miguel Angel Niño; Tevfik Onur Mente?; Andrea Locatelli; Kevin F. McCarty; José F. Marco; Juan de la Figuera

2012-01-11T23:59:59.000Z

443

Electromagnetic wormholes and virtual magnetic monopoles  

E-Print Network (OSTI)

We describe new configurations of electromagnetic (EM) material parameters, the electric permittivity $\\epsilon$ and magnetic permeability $\\mu$, that allow one to construct from metamaterials objects that function as invisible tunnels. These allow EM wave propagation between two points, but the tunnels and the regions they enclose are not detectable to EM observations. Such devices function as wormholes with respect to Maxwell's equations and effectively change the topology of space vis-a-vis EM wave propagation. We suggest several applications, including devices behaving as virtual magnetic monopoles.

Allan Greenleaf; Yaroslav Kurylev; Matti Lassas; Gunther Uhlmann

2007-03-20T23:59:59.000Z

444

Puncture detecting barrier materials  

DOE Patents (OSTI)

A method and apparatus for continuous real-time monitoring of the integrity of protective barrier materials, particularly protective barriers against toxic, radioactive and biologically hazardous materials has been developed. Conductivity, resistivity or capacitance between conductive layers in the multilayer protective materials is measured by using leads connected to electrically conductive layers in the protective barrier material. The measured conductivity, resistivity or capacitance significantly changes upon a physical breach of the protective barrier material. 4 figs.

Hermes, R.E.; Ramsey, D.R.; Stampfer, J.F.; Macdonald, J.M.

1998-03-31T23:59:59.000Z

445

High-pressure studies of rare earth material could lead to lighter, cheaper  

NLE Websites -- All DOE Office Websites (Extended Search)

22013_earth 22013_earth 12/20/2013 A Lawrence Livermore researcher prepares a sample at Oak Ridge National Laboratory's Spallation Neutrons and Pressure Diffractometer (SNAP). High-pressure studies of rare earth material could lead to lighter, cheaper magnets Anne M Stark, LLNL, (925) 422-9799, stark8@llnl.gov Sometimes you have to apply a little pressure to get magnetic materials to reveal their secrets. By placing a permanent magnet under high pressures, Lawrence Livermore researchers are exploring how atomic structure enhances magnetic strength and resistance to demagnetization. This fundamental research into magnetic behavior has important implications for engineering stronger, cheaper magnets. Permanent magnets based on rare earth elements are in high demand for

446

Dempsey-012114 - Argonne National Laboratories, Materials Sicence Division  

NLE Websites -- All DOE Office Websites (Extended Search)

Dempsey-012114 Dempsey-012114 MATERIALS SCIENCE SEMINAR SPEAKER: Nora Dempsey Institut Néel - CNRS, 
France TITLE: High performance hard magnetic films: from model systems to micro-system applications DATE: Monday, January 14, 2013 TIME: 11:00 a.m. PLACE: Building 223 / S-105 HOST: Jidong Samuel Jiang ABSTRACT: High performance hard magnetic materials are of growing importance for clean energy technologies (hybrid electric vehicles, gearless wind turbines...) and have great potential for use in micro-systems. In this talk I will report on the preparation and characterisation of NdFeB thick films. On the one hand these films are used as model systems to study magnetization reversal, with the aim of guiding the development of heavy rare earth free magnets. On the other, they are

447

Influence of inhomogeneous static magnetic field-exposure on patients with erosive gastritis: a randomized, self- and placebo-controlled, double-blind, single centre, pilot study  

Science Journals Connector (OSTI)

...to the SMF producing generator, but the magnetic material inside the generator was not magnetized...device. Sham magnetic induction corresponded to the...of either SMF or sham generator on the tissue was about...of SMF with magnetic induction below 8 T in human trials...

2014-01-01T23:59:59.000Z

448

Iron-Nitride Alloy Magnets: Transformation Enabled Nitride Magnets Absent Rare Earths (TEN Mare)  

SciTech Connect

REACT Project: Case Western is developing a highly magnetic iron-nitride alloy to use in the magnets that power electric motors found in EVs and renewable power generators. This would reduce the overall price of the motor by eliminating the expensive imported rare earth minerals typically found in today’s best commercial magnets. The iron-nitride powder is sourced from abundant and inexpensive materials found in the U.S. The ultimate goal of this project is to demonstrate this new magnet system, which contains no rare earths, in a prototype electric motor. This could significantly reduce the amount of greenhouse gases emitted in the U.S. each year by encouraging the use of clean alternatives to oil and coal.

None

2012-01-01T23:59:59.000Z

449

Joining of dissimilar materials  

DOE Patents (OSTI)

A method of joining dissimilar materials having different ductility, involves two principal steps: Decoration of the more ductile material's surface with particles of a less ductile material to produce a composite; and, sinter-bonding the composite produced to a joining member of a less ductile material. The joining method is suitable for joining dissimilar materials that are chemically inert towards each other (e.g., metal and ceramic), while resulting in a strong bond with a sharp interface between the two materials. The joining materials may differ greatly in form or particle size. The method is applicable to various types of materials including ceramic, metal, glass, glass-ceramic, polymer, cermet, semiconductor, etc., and the materials can be in various geometrical forms, such as powders, fibers, or bulk bodies (foil, wire, plate, etc.). Composites and devices with a decorated/sintered interface are also provided.

Tucker, Michael C; Lau, Grace Y; Jacobson, Craig P

2012-10-16T23:59:59.000Z

450

Sensors & Materials | Argonne National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Sensors and Materials Argonne uses its materials and engineering expertise to develop, test, and deploy sensors and materials to detect nuclear and radiological materials, chemical...

451

Modeling and Characterization of the Magnetocaloric Effect in Ni2MnGa Materials  

SciTech Connect

Magnetic shape memory alloys have great promise as magneto-caloric effect refrigerant materials due to their combined magnetic and structural transitions. Computational and experimental research is reported on the Ni2MnGa material system. The magnetic states of this system are explored using the Wang-Landau statistical approach in conjunction with the Locally Self-consistent Multiple-Scattering method. The effects of alloying agents on the transition temperatures of the Ni2MnGa alloy are investigated using differential scanning calorimetry and superconducting quantum interference device. Experiments are performed at the Spallation Neutron Source at Oak Ridge National Laboratory to observe the structural and magnetic phase transformations.

Nicholson, Don M [ORNL; Odbadrakh, Khorgolkhuu [ORNL; Shassere, Benjamin [ORNL; Rios, Orlando [ORNL; Hodges, Jason P [ORNL; Ludtka, Gerard Michael [ORNL; Porter, Wallace D [ORNL; Safa-Sefat, Athena [ORNL; Rusanu, Aurelian [ORNL; Brown, Greg [ORNL; Evans III, Boyd Mccutchen [ORNL

2014-01-01T23:59:59.000Z

452

Permanent magnet steam generator  

SciTech Connect

This patent describes a system for magnetic heating of a fluid by motor rotation of a permanent magnet rotor adjacent an assembly of ferro-magnetic condensing plate and of copper heat absorber plate with protrusions through the ferro-magnetic condensing plate into an enclosure with the fluid therein and having fluid inlet and fluid outlet. The assembly has a first shaft and a second shaft coaxially spaced therefrom, a respective the motor connected to the outer end of each shaft, and a respective the permanent magnet rotor connected to the inner end of each shaft, adjacent a the heat absorber plate. The improvement described here comprises: the enclosure including a steel boiler with a first the ferro-magnetic condensing plate closing off a first end thereof and a second the ferro-magnetic condensing plate closing off a second end thereof, a the copper heat absorbing plate affixed on each ferro-magnetic plate; means, free of pockets, for promoting turbulent flow of the fluid with uniformly good heat transfer including the protrusion being a plurality of heat sinks, each heat sink of the plurality of heat sinks comprising an integral elongate member with an alternately large diameter and smaller diameter portions regularly spaced therealong. The elongate members through the first the ferro-magnetic condensing plate are coaxially aligned with the elongate members through the second the ferro-magnetic condensing plate.

Gerard, F.; Gerard, F.J.

1986-09-30T23:59:59.000Z

453

MAXIMIZING MAGNETIC ENERGY STORAGE IN THE SOLAR CORONA  

SciTech Connect

The energy that drives solar eruptive events such as coronal mass ejections (CMEs) almost certainly originates in coronal magnetic fields. Such energy may build up gradually on timescales of days or longer before its sudden release in an eruptive event, and the presence of free magnetic energy capable of rapid release requires nonpotential magnetic fields and associated electric currents. For magnetic energy to power a CME, that energy must be sufficient to open the magnetic field to interplanetary space, to lift the ejecta against solar gravity, and to accelerate the material to speeds of typically several hundred km s{sup -1}. Although CMEs are large-scale structures, many originate from relatively compact active regions on the solar surface-suggesting that magnetic energy storage may be enhanced when it takes place in smaller magnetic structures. This paper builds on our earlier work exploring energy storage in large-scale dipolar and related bipolar magnetic fields. Here we consider two additional cases: quadrupolar fields and concentrated magnetic bipoles intended to simulate active regions. Our models yield stored energies whose excess over that of the corresponding open field state can be greater than 100% of the associated potential field energy; this contrasts with maximum excess energies of only about 20% for dipolar and symmetric bipolar configurations. As in our previous work, energy storage is enhanced when we surround a nonpotential field with a strong overlying potential field that acts to 'hold down' the nonpotential flux as its magnetic energy increases.

Wolfson, Richard; Drake, Christina; Kennedy, Max, E-mail: wolfson@middlebury.edu [Department of Physics, Middlebury College, Middlebury, VT 05753 (United States)

2012-05-01T23:59:59.000Z

454

Maximizing Magnetic Energy Storage in the Solar Corona  

Science Journals Connector (OSTI)

The energy that drives solar eruptive events such as coronal mass ejections (CMEs) almost certainly originates in coronal magnetic fields. Such energy may build up gradually on timescales of days or longer before its sudden release in an eruptive event, and the presence of free magnetic energy capable of rapid release requires nonpotential magnetic fields and associated electric currents. For magnetic energy to power a CME, that energy must be sufficient to open the magnetic field to interplanetary space, to lift the ejecta against solar gravity, and to accelerate the material to speeds of typically several hundred km s–1. Although CMEs are large-scale structures, many originate from relatively compact active regions on the solar surface—suggesting that magnetic energy storage may be enhanced when it takes place in smaller magnetic structures. This paper builds on our earlier work exploring energy storage in large-scale dipolar and related bipolar magnetic fields. Here we consider two additional cases: quadrupolar fields and concentrated magnetic bipoles intended to simulate active regions. Our models yield stored energies whose excess over that of the corresponding open field state can be greater than 100% of the associated potential field energy; this contrasts with maximum excess energies of only about 20% for dipolar and symmetric bipolar configurations. As in our previous work, energy storage is enhanced when we surround a nonpotential field with a strong overlying potential field that acts to "hold down" the nonpotential flux as its magnetic energy increases.

Richard Wolfson; Christina Drake; Max Kennedy

2012-01-01T23:59:59.000Z

455

McHenry-121913 - Argonne National Laboratories, Materials Sicence Division  

NLE Websites -- All DOE Office Websites (Extended Search)

McHenry-121913 McHenry-121913 MATERIALS SCIENCE COLLOQUIUM SPEAKER: Michael McHenry IEEE Distinguished Lecturer, Carnegie Mellon University TITLE: Nanocomposite Magnets for Power Electronic Applications DATE: Thursday, Dec. 19, 2013 TIME: 11:00 am PLACE: ESB 241, Conference Room D172 HOST: Olle Heinonen ABSTRACT: Recent USDOE workshops highlight the need for advanced soft magnetic materials leveraged in novel designs of power electronic components and systems for power conditioning and grid integration. Similarly soft magnetic materials figure prominently in applications in electric vehicles and high torque motors. Dramatic weight and size reductions are possible in such applications. Nanocomposites also hold potential for applications in active magneocaloric cooling of such devices.

456

Comprehensive Nuclear Materials  

SciTech Connect

This book encompasses a rich seam of current information on the vast and multidisciplinary field of nuclear materials employed in fission and prototype fusion systems. Discussion includes both historical and contemporary international research in nuclear materials, from Actinides to Zirconium alloys, from the worlds leading scientists and engineers. Synthesizes pertinent current science to support the selection, assessment, validation and engineering of materials in extreme nuclear environments. The work discusses the major classes of materials suitable for usage in nuclear fission, fusion reactors and high power accelerators, and for diverse functions in fuels, cladding, moderator and control materials, structural, functional, and waste materials.

Konings, Dr. Rudy J. M. [European Commission Joint Research Centre; Allen, Todd R. [University of Wisconsin, Madison; Stoller, Roger E [ORNL; Yamanaka, Prof. Shinsuke [Osaka University

2012-01-01T23:59:59.000Z

457

The influence of the magnetic field on the performance of an active magnetic regenerator (AMR)  

E-Print Network (OSTI)

The influence of the time variation of the magnetic field, termed the magnetic field profile, on the performance of a magnetocaloric refrigeration device using the active magnetic regeneration (AMR) cycle is studied for a number of process parameters for both a parallel plate and packed bed regenerator using a numerical model. The cooling curve of the AMR is shown to be almost linear far from the Curie temperature of the magnetocaloric material. It is shown that a magnetic field profile that is 10% of the cycle time out of sync with the flow profile leads to a drop in both the maximum temperature span and the maximum cooling capacity of 20-40\\% for both parallel plate and packed bed regenerators. The maximum cooling capacity is shown to depend very weakly on the ramp rate of the magnetic field. Reducing the temporal width of the high field portion of the magnetic field profile by 10% leads to a drop in maximum temperature span and maximum cooling capacity of 5-20%. An increase of the magnetic field from 1 T t...

Bjørk, R

2014-01-01T23:59:59.000Z

458

Determining the exchange parameters of spin-1 metal-organic molecular magnets in pulsed magnetic fields  

SciTech Connect

We nave measured the high-field magnetization of a number of Ni-based metal-organic molecular magnets. These materials are self-assembly coordination polymers formed from transition metal ions and organic ligands. The chemistry of the compounds is versatile allowing many structures with different magnetic properties to be formed. These studies follow on from previous measurements of the Cu-based analogues in which we showed it was possible to extract the exchange parameters of low-dimensional magnets using pulsed magnetic fields. In our recent experiments we have investigated the compound (Ni(HF{sub 2})(pyz){sub 2})PF{sub 6}, where pyz = pyrazine, and the Ni-ions are linked in a quasi-two-dimensional (Q2D) square lattice via the pyrazine molecules, with the layers held together by HF{sub 2} ligands. We also investigated Ni(NCS){sub 2}(pyzdo){sub 2}, where pyzdo = pyrazine dioxide. The samples are grown at Eastern Washington University using techniques described elsewhere. Measurements are performed at the pulsed magnetic field laboratory in Los Alamos. The magnetization of powdered samples is determined using a compensated coil magnetometer in a 65 T short pulse magnet. Temperatures as low as 500 mK are achievable using a {sup 3}He cryostat. The main figure shows the magnetization of the spin-1 [Ni(HF{sub 2})(pyz){sub 2}]PF{sub 6} compound at 1.43 K. The magnetization rises slowly at first, achieving a rounded saturation whose midpoint is around 19 T. A small anomaly is also seen in the susceptibility at low fields ({approx}3 T), which might be attributed to a spin-flop transition. In contrast, the spin-1/2 [Cu(HF{sub 2})(pyz){sub 2}]PF{sub 6} measured previously has a saturation magnetization of 35.5 T and a strongly concave form of M(B) below this field. This latter compound was shown to be a good example of a Q2D Heisenberg antiferromagnet with the strong exchange coupling (J{sub 2D} = 12.4 K, J{sub {perpendicular}}/J{sub 2D} {approx} 10{sup -2}) directed along the Cu-pyz-Cu directions. The structure of the two compounds is similar, but in the case of the Cu-compound the Cu-Cu pathways are linear, whereas in the Ni-compound they are kinked. The pulsed-field data combined with information from temperature-dependent susceptibility, muon-spin rotation, electron-spin resonance and ligand-field calculations suggest that, far from being magnetically Q2D, the Ni-compound is fairly one-dimensional with the dominant exchange (J{sub 1D} = 3.1 K and J{sub {perpendicular}}/J{sub 1D} = 0.63) directed along the Ni-FHF-Ni direction. Ni(NCS){sub 2}(pyzdo){sub 2} was also investigated. Previous ultra-high field measurements using the 100 T magnet have shown that this compound has a saturation field close to 80 T. The purpose of the present studies is to map out the phase diagram of this material at mid-range fields. The data are shown in the inset to the figure. This continuing project probes the ability of organic ligands to mediate magnetic exchange, the link between structure, dimensionality and bulk magnetic properties, as well as the role of spin number in quantum magnets. Ultimately the investigations aim to determine to what extent it is possible to produce self-assembly molecular materials with tailor-made magnetic characteristics.

Mcdonald, Ross D [Los Alamos National Laboratory; Singleton, John [Los Alamos National Laboratory; Lancaster, Tom [OXFORD UNIV.; Goddard, Paul [OXFORD UNIV.; Manson, Jamie [EASTERN WASHINGTON UNIV.

2011-01-14T23:59:59.000Z

459

High Field Magnet R&D |Superconducting Magnet Division  

NLE Websites -- All DOE Office Websites (Extended Search)

High Field Magnet R&D High Field Magnet R&D The Superconducting Magnet Division is developing advanced magnet designs and magnet-related technologies for high field accelerator magnets. We are currently working on magnets for three inter-related programs: High Field Magnets for Muon Collider Papers, Presentations Common Coil Magnets Papers, Presentations Interaction Region Magnets Papers, Presentations High Temperature Superconductor (HTS) Magnets Papers, Presentations This is part of a multi-lab superconducting magnet development program for new accelerator facilities that would be part of the U.S. High Energy Physics program. These programs (@BNL, @FNAL, @LBNL) are quite complimentary to each other, so that magnet designs and technologies developed at one laboratory can be easily transferred to another. The BNL

460

Interfacial deformation and jetting of a magnetic fluid  

E-Print Network (OSTI)

An attractive technique for forming and collecting aggregates of magnetic material at a liquid--air interface by an applied magnetic field gradient was recently addressed theoretically and experimentally [Soft Matter, (9) 2013, 8600-8608]: when the magnetic field is weak, the deflection of the liquid--air interface has a steady shape, while for sufficiently strong fields, the interface destabilizes and forms a jet that extracts magnetic material. Motivated by this work, we develop a numerical model for the closely related problem of solving two-phase Navier--Stokes equations coupled with the static Maxwell equations. We computationally model the forces generated by a magnetic field gradient produced by a permanent magnet and so determine the interfacial deflection of a magnetic fluid (a pure ferrofluid system) and the transition into a jet. We analyze the shape of the liquid--air interface during the deformation stage and the critical magnet distance for which the static interface transitions into a jet. We d...

Afkhami, Shahriar; Griffiths, Ian M

2015-01-01T23:59:59.000Z

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


461

Passive magnetic bearing system  

DOE Patents (OSTI)

An axial stabilizer for the rotor of a magnetic bearing provides external control of stiffness through switching in external inductances. External control also allows the stabilizer to become a part of a passive/active magnetic bearing system that requires no external source of power and no position sensor. Stabilizers for displacements transverse to the axis of rotation are provided that require only a single cylindrical Halbach array in its operation, and thus are especially suited for use in high rotation speed applications, such as flywheel energy storage systems. The elimination of the need of an inner cylindrical array solves the difficult mechanical problem of supplying support against centrifugal forces for the magnets of that array. Compensation is provided for the temperature variation of the strength of the magnetic fields of the permanent magnets in the levitating magnet arrays.

Post, Richard F.

2014-09-02T23:59:59.000Z

462

CHAPTER 3. STRUCTURE OF MAGNETIC FIELDS 1 Structure of Magnetic  

E-Print Network (OSTI)

CHAPTER 3. STRUCTURE OF MAGNETIC FIELDS 1 Chapter 3 Structure of Magnetic Fields Many of the most interesting plasmas are permeated by or imbedded in magnetic fields.1 As shown in Fig. 3.1, the magnetic field properties of magnetic fields in plasmas can be discussed without specifying a model for the plasma

Callen, James D.

463

MaterialsScienceandEngineeringDepartmentColloquium 4:00 P.M. Monday, March 31, 2014  

E-Print Network (OSTI)

, Materials science and engineering Building 1304 W green street, urBana Department of Materials Science for cheaper, sustainable and more efficient products has also motivated the development of new materials in the development of new devices, whether they involve charges, heat, elec- tromagnetic radiation and even magnetic

Weaver, John H.

464

L1 Adaptive Control of Hysteresis in Smart Materials Xiang Fan and Ralph C. Smith  

E-Print Network (OSTI)

L1 Adaptive Control of Hysteresis in Smart Materials Xiang Fan and Ralph C. Smith Center 27695 ABSTRACT Smart materials display coupling between electrical, magnetic, thermal and elastic inherent to smart materials presents a challenge in control of these actuators/sensors. Inverse

465

Magnetic Moment of the Free Muon  

Science Journals Connector (OSTI)

The magnetic moment of the positive ? meson has been measured in several target materials by a magnetic resonance technique. Muons were brought to rest with their spins parallel to a magnetic field. A radio-frequency pulse was applied to effect a spin reorientation which was detected by counting the decay electrons emerging after the pulse in a fixed direction. Results are expressed in terms of a g factor which for a spin 1/2 particle is the ratio of the actual moment to e?2m?c. The most accurate result obtained in a CHBr3 target, is that g=2(1.0026±0.0009) compared to the theoretical prediction of g=2(1.0012). Less accurate measurements yielded g=2.005±0.005 in a copper target and g=2.00±0.01 in a lead target.

T. Coffin; R. L. Garwin; S. Penman; L. M. Lederman; A. M. Sachs

1958-02-01T23:59:59.000Z

466

ARM - Public Information Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

govPublicationsPublic Information Materials govPublicationsPublic Information Materials Publications Journal Articles Conference Documents Program Documents Technical Reports Publications Database Public Information Materials Image Library Videos Publication Resources Submit a Publication Publishing Procedures ARM Style Guide (PDF, 448KB) Acronyms Glossary Logos Contacts RSS for Publications Public Information Materials The ARM Climate Research Facility develops public information materials to communicate the purpose and objectives of the program to general audiences. These materials are designed to increase awareness of ARM Climate Research Facility goals and to document its scientific results to a lay audience. Public information materials include fact sheets, brochures, CDs, videos, press releases, and information packets. Approved materials are made

467

Nanostructured composite reinforced material  

DOE Patents (OSTI)

A family of materials wherein nanostructures and/or nanotubes are incorporated into a multi-component material arrangement, such as a metallic or ceramic alloy or composite/aggregate, producing a new material or metallic/ceramic alloy. The new material has significantly increased strength, up to several thousands of times normal and perhaps substantially more, as well as significantly decreased weight. The new materials may be manufactured into a component where the nanostructure or nanostructure reinforcement is incorporated into the bulk and/or matrix material, or as a coating where the nanostructure or nanostructure reinforcement is incorporated into the coating or surface of a "normal" substrate material. The nanostructures are incorporated into the material structure either randomly or aligned, within grains, or along or across grain boundaries.

Seals, Roland D. (Oak Ridge, TN); Ripley, Edward B. (Knoxville, TN); Ludtka, Gerard M. (Oak Ridge, TN)

2012-07-31T23:59:59.000Z

468

Earth-Abundant Materials  

Energy.gov (U.S. Department of Energy (DOE))

DOE funds research into Earth-abundant materials for thin-film solar applications in response to the issue of materials scarcity surrounding other photovoltaic (PV) technologies. Below are a list...

469

Geopolymer Sealing Materials  

Energy.gov (U.S. Department of Energy (DOE))

DOE Geothermal Peer Review 2010 - Presentation. Project objectives: Develop and characterize field-applicable geopolymer temporary sealing materials in the laboratory and to transfer this developed material technology to geothermal drilling service companies as collaborators for field validation tests.

470

Applications of Ceramic Materials  

Science Journals Connector (OSTI)

The use of ceramic materials in science and industry is becoming increasingly widespread. As discussed in Chap. 4, ceramic materials have important advantages over metals and polymers in electronic devices at ...

Murat Bengisu

2001-01-01T23:59:59.000Z

471

Nanocomposites as thermoelectric materials  

E-Print Network (OSTI)

Thermoelectric materials have attractive applications in electric power generation and solid-state cooling. The performance of a thermoelectric device depends on the dimensionless figure of merit (ZT) of the material, ...

Hao, Qing

2010-01-01T23:59:59.000Z

472

Materials Science & Engineering  

E-Print Network (OSTI)

and Forensics team in the Polymers and Coatings Group, MST-7. He graduated from the University of Toledo, aerogels, carbon fiber composites, damaged materials, and low density materials examining defects

473

LANL: Materials Science Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Science Laboratory (MSL) is Materials Science Laboratory (MSL) is an interdisciplinary facility dedicated to research on current materials and those of future interest. It is a 56,000 square-foot modern facility that can be easily reconfigured to accom- modate new processes and operations. It compris- es 27 laboratories, 15 support rooms, and 60 offices. The MSL supports many distinct materi- als research topics, grouped into four focus areas: mechanical behavior, materials processing, syn- thesis, and characterization. Research within the MSL supports programs of national interest in defense, energy, and the basic sciences. The MSL is a non-classified area in the Materials Science Complex in close proximity to classified and other non-classified materials research facilities. The Materials Science

474

Pulse magnetic welder  

DOE Patents (OSTI)

A welder is described for automated closure of fuel pins by a pulsed magnetic process in which the open end of a length of cladding is positioned within a complementary tube surrounded by a pulsed magnetic welder. Seals are provided at each end of the tube, which can be evacuated or can receive tag gas for direct introduction to the cladding interior. Loading of magnetic rings and end caps is accomplished automatically in conjunction with the welding steps carried out within the tube.

Christiansen, D.W.; Brown, W.F.

1984-01-01T23:59:59.000Z

475

Brownian motion and magnetism  

Science Journals Connector (OSTI)

We present an interesting connection between Brownian motion and magnetism. We use this to determine the distribution of areas enclosed by the path of a particle diffusing on a sphere. In addition, we find a bound on the free energy of an arbitrary system of spinless bosons in a magnetic field. The work presented here is expected to shed light on polymer entanglement, depolarized light scattering, and magnetic behavior of spinless bosons.

Supurna Sinha and Joseph Samuel

1994-11-01T23:59:59.000Z

476

The Virtues of Magnetism  

Science Journals Connector (OSTI)

The Virtues of Magnetism ... In Mozart’s late opera Così fan tutte from 1790, Despina, the accomplice of thread puller Don Alfonso, instantly heals the two male characters who are pretending to be dying by using the virtues of magnetism. ... Although magnetism had been known for centuries, its scientific sources were not yet understood at the end of the 18th century, when Lorenzo da Ponte wrote the libretto. ...

Jan-Ole Joswig; Tommy Lorenz; Gotthard Seifert

2013-12-23T23:59:59.000Z

477

The overview and history of permanent magnet devices in accelerator technology  

SciTech Connect

This paper reviews the early history of accelerator development with a particular focus on the important discoveries that opened the door for the application of permanent-magnet materials to this area of science. Researchers began to use permanent-magnet materials in particle accelerators soon after the invention of the alternating gradient principle, that showed magnetic fields could be used to control the transverse envelope of charged-particle beams. Since that time, permanent-magnet materials have found wide application in the modern charged particle accelerator. The history of permanent-magnet use in accelerator physics and technology is outlined, general design considerations are presented, and material properties of concern for particle accelerator applications are discussed.

Kraus, R.H. Jr.

1993-10-01T23:59:59.000Z

478

Instructions and Materials  

Energy.gov (U.S. Department of Energy (DOE))

The following are 2012 Program Peer Review Meeting instructions, materials and resource links for presenters and reviewers.

479

Magnetic differential torque sensor  

SciTech Connect

A new torque sensor structure is presented. The basic idea is a simple torque sensor with a variable magnetic circuit excited by an axially magnetized permanent magnet ring. The circuit is constituted by iron toothed rings, whose teeth relative position changes whenever an applied torque twists the rotating shaft. A Hall probe measures the induction in an airgap where the induction is uniform. The new structure is an association of two previous ones, thus creating a differential system with the related advantages: diminution of thermal drifts, zero mean value for the signal. The new magnetic circuit is studied by calculating equivalent reluctances through energy calculations and by using electrical analogies.

Lemarquand, V.; Lemarquand, G. [Univ. de Savoie, Annecy-le-Vieux (France)] [Univ. de Savoie, Annecy-le-Vieux (France)

1995-11-01T23:59:59.000Z

480

Holographic Magnetic Phase Transition  

E-Print Network (OSTI)

We study four-dimensional interacting fermions in a strong magnetic field, using the holographic Sakai-Sugimoto model of intersecting D4 and D8 branes in the deconfined, chiral-symmetric parallel phase. We find that as the magnetic field is varied, while staying in the parallel phase, the fermions exhibit a first-order phase transition in which their magnetization jumps discontinuously. Properties of this transition are consistent with a picture in which some of the fermions jump to the lowest Landau level. Similarities to known magnetic phase transitions are discussed.

Gilad Lifschytz; Matthew Lippert

2009-06-21T23:59:59.000Z

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


481

Nuclear magnetic resonance imaging  

Science Journals Connector (OSTI)

Nuclear magnetic resonance imaging (NMRI) is a powerful imaging modality having a range of important applications to medicine and industry. The basic principles of NMRI are reviewed in...

Rothwell, William P

1985-01-01T23:59:59.000Z

482

Magnetic Field Viewing Cards  

Science Journals Connector (OSTI)

For some years now laminated cards containing a green magnetically sensitive film have been available from science education suppliers. When held near a magnet these cards appear dark green in regions where the field is perpendicular to the card and light green where the field is parallel to the card. The cards can be used to explore the magnetic field near a variety of magnets as well as near wire loops. In this paper we describe how to make these cards and how we have used them in our physics classrooms and labs.

Stephen Kanim; John R. Thompson

2005-01-01T23:59:59.000Z

483

Recycling Magnets | Jefferson Lab  

NLE Websites -- All DOE Office Websites (Extended Search)

Recycling Magnets July 15, 2013 The cost of a nuclear or particle physics experiment can be enormous, several hundred million dollars for the Large Hadron Collider Experiments,...

484

Nuclear Magnetic Moments  

Science Journals Connector (OSTI)

This paper contains approximate formulas (Eqs. (5) and (6) for the calculation of nuclear magnetic moments from observed hyperfine structure separations.

S. Goudsmit

1933-04-15T23:59:59.000Z

485

Magnetism in hafnium dioxide  

Science Journals Connector (OSTI)

Thin films of HfO2 produced by pulsed-laser deposition on sapphire, yttria-stabilized zirconia, or silicon substrates show ferromagnetic magnetization curves with little hysteresis and extrapolated Curie temperatures far in excess of 400K. The moment does not scale with film thickness, but in terms of substrate area it is typically in the range 150–400?Bnm?2. The magnetization exhibits a remarkable anisotropy, which depends on texture and substrate orientation. Pure HfO2 powder develops a weak magnetic moment on heating in vacuum, which is eliminated on annealing in oxygen. Lattice defects are the likely source of the magnetism.

J. M. D. Coey; M. Venkatesan; P. Stamenov; C. B. Fitzgerald; L. S. Dorneles

2005-07-22T23:59:59.000Z

486

Transverse Optical Magnetism  

Science Journals Connector (OSTI)

Magnetic interactions with light are usually so small that they are ignored, even in nonlinear optics. Scientists have discovered that parametric processes can drive the interactions...

Rand, Stephen

2010-01-01T23:59:59.000Z

487

Magnetism and Electricity  

Science Journals Connector (OSTI)

... of the mariner's compass being especially good; indeed, the whole chapter on terrestrial magnetism is the best elementary account of the subject which has come under our notice. ...

1889-11-14T23:59:59.000Z

488

Magnetic Braids Anthony Yeates  

E-Print Network (OSTI)

flux function Main result Conclusion 2. Thermonuclear confinement devices. ITER (Internat'l Thermonuclear Experimental Reactor). Inside the KSTAR tokamak. Correspond to periodic magnetic braids. 4 / 22

Dundee, University of

489

Why engineer porous materials?  

Science Journals Connector (OSTI)

...thermal conductivity materials (Maex et al. 2003...Hrubesh et al. 1993); materials remarkably similar to...reduce the oxygen at the cathode and oxidize the fuel...electrochemically active, have large surface...volume fraction of porous materials about 0.3 (Brandon...

2006-01-01T23:59:59.000Z

490

Critical Materials Workshop  

Energy.gov (U.S. Department of Energy (DOE))

AMO hosted a public workshop on Tuesday, April 3, 2012 in Arlington, VA to provide background information on critical materials assessment, the current research within DOE related to critical materials, and the foundational aspects of Energy Innovation Hubs. Additionally, the workshop solicited input from the critical materials community on R&D gaps that could be addressed by DOE.

491

PROTOSTELLAR ACCRETION FLOWS DESTABILIZED BY MAGNETIC FLUX REDISTRIBUTION  

SciTech Connect

Magnetic flux redistribution lies at the heart of the problem of star formation in dense cores of molecular clouds that are magnetized to a realistic level. If all of the magnetic flux of a typical core were to be dragged into the central star, the stellar field strength would be orders of magnitude higher than the observed values. This well-known magnetic flux problem can in principle be resolved through non-ideal MHD effects. Two-dimensional (axisymmetric) calculations have shown that ambipolar diffusion, in particular, can transport magnetic flux outward relative to matter, allowing material to enter the central object without dragging the field lines along. We show through simulations that such axisymmetric protostellar accretion flows are unstable in three dimensions to magnetic interchange instability in the azimuthal direction. The instability is driven by the magnetic flux redistributed from the matter that enters the central object. It typically starts to develop during the transition from the prestellar phase of star formation to the protostellar mass accretion phase. In the latter phase, the magnetic flux is transported outward mainly through advection by strongly magnetized low-density regions that expand against the collapsing inflow. The tussle between the gravity-driven infall and magnetically driven expansion leads to a highly filamentary inner accretion flow that is more disordered than previously envisioned. The efficient outward transport of magnetic flux by advection lowers the field strength at small radii, making the magnetic braking less efficient and the formation of rotationally supported disks easier in principle. However, we find no evidence for such disks in any of our rotating collapse simulations. We conclude that the inner protostellar accretion flow is shaped to a large extent by the flux redistribution-driven magnetic interchange instability. How disks form in such an environment is unclear.

Krasnopolsky, Ruben; Shang, Hsien [Academia Sinica, Institute of Astronomy and Astrophysics, Taipei, Taiwan (China); Li Zhiyun; Zhao Bo [University of Virginia, Astronomy Department, Charlottesville (United States)

2012-09-20T23:59:59.000Z

492

Bulk Materials Synthesis & Characterization, Condensed Matter Physics &  

NLE Websites -- All DOE Office Websites (Extended Search)

Site Details Site Details EMSC Homepage Research Publications Collaborators Laboratory People Links of Interest Other Information Basic Energy Sciences Directorate Condensed Matter Physics & Materials Science Dept Oxide Molecular Beam Epitaxy Group BNL Site Index Can't View PDFs? Exploratory Materials Synthesis & Characterization The focus of our research is design, discovery, synthesis and characterization of new model materials for condensed matter physics. Particular emphasis is devoted to the discovery of new phenomena associated with correlated electron behavior and problems in superconductivity and magnetism. Since many observables are tensor quantities, significant effort is devoted to the synthesis of materials in single crystal form. New materials are prepared by variety of growth methods: conventional arc melting and powder metallurgical techniques, solution methods, high temperature intermetallic, oxide or sulfide flux as well as chemical vapor transport and deposition. Automated physical and structural characterization is the essential component of the lab. In order to optimize synthesis parameters, it is necessary to characterize structural and physical properties of materials. Quite often the same methods are used to probe and perturb crystal structure, transport, thermodynamic and magnetic properties of new materials at extreme conditions of low temperatures, high magnetic fields and high pressures.

493

National High Magnetic Field Laboratory: An Introduction to Magnets...  

NLE Websites -- All DOE Office Websites (Extended Search)

is a magnet); opposite poles attract, like poles repel. In all magnets, the magnetic field lines run from south to north, and these fields are what produce forces on other...

494

Hydrogen Compatibility of Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Compatibility of Materials Compatibility of Materials August 13, 2013 DOE EERE Fuel Cell Technologies Office Webinar Chris San Marchi Sandia National Laboratories Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000 SAND2013-6278P 2 Webinar Objectives * Provide context for hydrogen embrittlement and hydrogen compatibility of materials - Distinguish embrittlement, compatibility and suitability - Examples of hydrogen embrittlement * Historical perspective - Previous work on hydrogen compatibility - Motivation of "Materials Guide" * Identify the landscape of materials compatibility documents

495

NEWTON's Material Science Archive  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Science Archive: Materials Science Archive: Loading Most Recent Materials Science Questions: Hydrogen Compounds and Heat Conduction Weaving Carbon Nanotubes Metal as Electrical Conductor, Not Thermal Steel Changes with Age PETE, Ultraviolet Light, Benefits Strength of Yarn by Spinning Each Substance Unique Density Alloy versus Constituent Density Knowing When Material is Melted Crystalline Metal Versus Metallic Glass and Conduction Super Glue, Surgery, and Skin Silica Gel Teflon Non-Stick Property Salt Crystal Formation Lubricating Rubber Bands and Elasticity Materials for Venus Probe Crystalline Solids and Lowest Energy Sodium Polycarbonate and Salt Water Early Adhesives Surface Energy and Temperature Separating Polypropylene, Polyester, and Nylon Factors Effecting Polymer Flexibility

496

Tailored Porous Materials  

SciTech Connect

Tailoring of porous materials involves not only chemical synthetic techniques for tailoring microscopic properties such as pore size, pore shape, pore connectivity, and pore surface reactivity, but also materials processing techniques for tailoring the meso- and the macroscopic properties of bulk materials in the form of fibers, thin films and monoliths. These issues are addressed in the context of five specific classes of porous materials: oxide molecular sieves, porous coordination solids, porous carbons, sol-gel derived oxides, and porous heteropolyanion salts. Reviews of these specific areas are preceded by a presentation of background material and review of current theoretical approaches to adsorption phenomena. A concluding section outlines current research needs and opportunities.

BARTON,THOMAS J.; BULL,LUCY M.; KLEMPERER,WALTER G.; LOY,DOUGLAS A.; MCENANEY,BRIAN; MISONO,MAKOTO; MONSON,PETER A.; PEZ,GUIDO; SCHERER,GEORGE W.; VARTULI,JAMES C.; YAGHI,OMAR M.

1999-11-09T23:59:59.000Z

497

Record Ferromagnetic Exchange through Cyanide and Elucidation of the Magnetic Phase Diagram for a CuII  

E-Print Network (OSTI)

decades.2-4 Indeed, these recent efforts have already resulted in low-density permanent magnets that order strength in magnetic materials, the compounds displaying the strongest coupling University of CaliforniaRecord Ferromagnetic Exchange through Cyanide and Elucidation of the Magnetic Phase Diagram

498

EXOTIC MAGNETS FOR ACCELERATORS.  

SciTech Connect

Over the last few years, several novel magnet designs have been introduced to meet the requirements of new, high performance accelerators and beam lines. For example, the FAIR project at GSI requires superconducting magnets ramped at high rates ({approx} 4 T/s) in order to achieve the design intensity. Magnets for the RIA and FAIR projects and for the next generation of LHC interaction regions will need to withstand high doses of radiation. Helical magnets are required to maintain and control the polarization of high energy protons at RHIC. In other cases, novel magnets have been designed in response to limited budgets and space. For example, it is planned to use combined function superconducting magnets for the 50 GeV proton transport line at J-PARC to satisfy both budget and performance requirements. Novel coil winding methods have been developed for short, large aperture magnets such as those used in the insertion region upgrade at BEPC. This paper will highlight the novel features of these exotic magnets.

WANDERER, P.

2005-09-18T23:59:59.000Z

499

Streched Magnetic Moments  

E-Print Network (OSTI)

We note that for a system of 2 nucleons in a stretched case (J=J1+J2) the magnetic moment of the combined system is the sum of the magnetic moments of the 2 constituents. We compile other simple formulas.

Larry Zamick; Yitzhak Sharon

2012-07-12T23:59:59.000Z

500

Magnetic insulation (reply)  

Science Journals Connector (OSTI)

... DR WINTERBERG REPLIES: Contrary to Blewett's belief, magnetic insulation has not only been experimentally confirmed2 since I proposed it several years ago1, but ... generators (for example, the MJ Aurora machine). The magnetic field needed for the insulation effect in this case is generated by the strong azimuthal self-induced field of the ...

F. WINTERBERG

1974-06-28T23:59:59.000Z