National Library of Energy BETA

Sample records for magnetic materials center

  1. Kazuhiro Hono, Magnetic Materials Center Managing Director, NIMS...

    Energy.gov [DOE] (indexed site)

    PDF icon SessionA7HonoNIMS.pdf More Documents & Publications Spomenka Kobe, Jozef Stefan Institut, Rare Earth Magnets in Europe Tom Lograsso, Ames Laboratory (Iowa State ...

  2. Energy Frontier Research Center Center for Materials Science...

    Office of Scientific and Technical Information (OSTI)

    Energy Frontier Research Center Center for Materials Science of Nuclear Fuels Citation Details In-Document Search Title: Energy Frontier Research Center Center for Materials ...

  3. Center Organization | Center for Energy Efficient Materials

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Center Organization People People Scientific Advisory Board Center Organization

  4. Center for Energy Efficient Materials

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Plastic Solar Solid State Lighting High-Efficiency Solar Cells Thermoelectrics Undergraduate Internship Program Overview The Center for Energy Efficient Materials (CEEM) is an ...

  5. Magnetic Materials | Advanced Photon Source

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Materials Internal Magnetic Materials The Magnetic Material Group (MMG) is part of the X-ray Science Division (XSD) at the Advanced Photon Source (APS). Our research focuses on the...

  6. Contact Us | Center for Energy Efficient Materials

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Mailing Address: Center for Energy Efficient Materials University of California Santa Barbara, CA 93106-9560 Location: Center for Energy Efficient Materials Phelps 2300 University ...

  7. Energy Frontier Research Center Center for Materials Science...

    Office of Scientific and Technical Information (OSTI)

    Frontier Research Center Center for Materials Science of Nuclear Fuels Citation Details ... of ab initio PDOS simulations. * Direct comparison between anharmonicity-smoothed ...

  8. Energy Frontier Research Center Center for Materials Science...

    Office of Scientific and Technical Information (OSTI)

    Technical Report: Energy Frontier Research Center Center for Materials Science of Nuclear Fuels Citation ... dispersion, and, further, that advanced lattice dynamics simulations ...

  9. Center for Lightweighting Automotive Materials and Processing...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Center for Lightweighting Automotive Materials and Processing 2008 Annual Merit Review Results Summary - 16. Technology Integration and Education GATE Center of Excellence in ...

  10. Energy Frontier Research Center Center for Materials Science of Nuclear

    Office of Scientific and Technical Information (OSTI)

    Fuels (Technical Report) | SciTech Connect Technical Report: Energy Frontier Research Center Center for Materials Science of Nuclear Fuels Citation Details In-Document Search Title: Energy Frontier Research Center Center for Materials Science of Nuclear Fuels Scientific Successes * The first phonon density of states (PDOS) measurements for UO2 to include anharmonicity were obtained using time-of-flight inelastic neutron scattering at the Spallation Neutron Source (SNS), and an innovative,

  11. Magnetic Materials Group

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    4-ID-C: Soft X-ray Magnetic Spectroscopy This beamline operates in the soft x-ray energy spectrum (500 - 2700 eV) using an electromagnetic helical undulator to provide circularly...

  12. Center for Lightweighting Automotive Materials and Processing...

    Energy.gov [DOE] (indexed site)

    GATE Center of Excellence in Lightweight Materials and Manufacturing Technologies Vehicle Technologies Office Merit Review 2014: Improving Fatigue Performance of AHSS Welds

  13. Center for Nanophase Materials Sciences - Newsletter January...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Center for Nanophase Materials Sciences and Panos Datskos of ORNL Measurement Science and Systems Engineering Division The technology, based on nonlinear nanomechanical resonators,...

  14. Center for Nanoscale Materials | Argonne National Laboratory

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    CNM on Facebook Career Opportunities CNM Intranet CNM on Facebook Argonne National Laboratory Center for Nanoscale Materials About Research Capabilities For Users People...

  15. Magnetic and Superconducting Materials at High Pressures

    SciTech Connect

    Struzhkin, Viktor V.

    2015-03-24

    The work concentrates on few important tasks in enabling techniques for search of superconducting compressed hydrogen compounds and pure hydrogen, investigation of mechanisms of high-Tc superconductivity, and exploring new superconducting materials. Along that route we performed several challenging tasks, including discovery of new forms of polyhydrides of alkali metal Na at very high pressures. These experiments help us to establish the experimental environment that will provide important information on the high-pressure properties of hydrogen-rich compounds. Our recent progress in RIXS measurements opens a whole field of strongly correlated 3d materials. We have developed a systematic approach to measure major electronic parameters, like Hubbard energy U, and charge transfer energy Δ, as function of pressure. This technique will enable also RIXS studies of magnetic excitations in iridates and other 5d materials at the L edge, which attract a lot of interest recently. We have developed new magnetic sensing technique based on optically detected magnetic resonance from NV centers in diamond. The technique can be applied to study superconductivity in high-TC materials, to search for magnetic transitions in strongly correlated and itinerant magnetic materials under pressure. Summary of Project Activities; development of high-pressure experimentation platform for exploration of new potential superconductors, metal polyhydrides (including newly discovered alkali metal polyhydrides), and already known superconductors at the limit of static high-pressure techniques; investigation of special classes of superconducting compounds (high-Tc superconductors, new superconducting materials), that may provide new fundamental knowledge and may prove important for application as high-temperature/high-critical parameter superconductors; investigation of the pressure dependence of superconductivity and magnetic/phase transformations in 3d transition metal compounds, including

  16. Design Principles for Materials with Magnetic Functionality ...

    Office of Scientific and Technical Information (OSTI)

    Design Principles for Materials with Magnetic Functionality Citation Details In-Document Search Title: Design Principles for Materials with Magnetic Functionality This report ...

  17. Magnetic filtration process, magnetic filtering material, and...

    Office of Scientific and Technical Information (OSTI)

    The present invention provides magnetically responsive activated carbon, and a method of forming magnetically responsive activated carbon. The method of forming magnetically ...

  18. Center for Nanophase Materials Sciences - Newsletter January...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    CNMS Updates The CNMS has a new director Sean Smith from the University of Queensland in Australia has accepted the position of director for the Center for Nanophase Materials...

  19. Design Principles for Materials with Magnetic Functionality

    SciTech Connect

    Thompson, Joe David

    2015-11-05

    This report describes the processes involved with refining and testing design principles of high density, magnetic materials and while observing their magnetic functionality.

  20. Research | Center for Energy Efficient Materials

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Research CEEM is one of 46 Energy Frontier Research Centers funded by the Department of Energy to address the energy challenge through technological advancements. The Center was launched in August 2009 and focuses on fundamental research in the three key areas of photovoltaics, thermoelectrics, and solid-state lighting. These technologies are strongly inter-related, not only through the materials they employ and physical principles upon which they operate, but also in the synergies resulting

  1. Facilities | Center for Energy Efficient Materials

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Facilities The Center for Energy Efficient Materials occupies approximately 3,000 square feet of assignable space in Phelps Hall. This space houses the Administrative offices of the Center, including offices for the Director, the Executive Director, the Financial Analyst, visiting scientists, and a number of post-docs, graduate students and undergraduate students. Two small seminar rooms are also included. The Institute for Energy Efficiency is co-located on the same floor, providing close

  2. Method and apparatus for separating materials magnetically

    DOEpatents

    Hise, Jr., Eugene C.; Holman, Allen S.

    1982-01-01

    Magnetic and non-magnetic materials are separated by passing stream thereof past coaxial current-carrying coils which produce a magnetic field wherein intensity varies sharply with distance radially of the axis of the coils.

  3. Magnetic Filtration Process, Magnetic Filtering Material, and Method of

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Forming Magnetic Filtering Material - Energy Innovation Portal Industrial Technologies Industrial Technologies Find More Like This Return to Search Magnetic Filtration Process, Magnetic Filtering Material, and Method of Forming Magnetic Filtering Material Oak Ridge National Laboratory Contact ORNL About This Technology Technology Marketing SummaryORNL researchers developed a new method for filtering materials and managing wastewater. This invention offers an integrated, intensified process

  4. International Center for Materials Research ICMR | Open Energy...

    OpenEI (Open Energy Information) [EERE & EIA]

    Name: International Center for Materials Research (ICMR) Place: Kawasaki-shi, Kanagawa, Japan Zip: 210-0855 Product: International Center for Materials Reseach is a Japanese...

  5. Edison Material Technology Center EMTEC | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Material Technology Center EMTEC Jump to: navigation, search Name: Edison Material Technology Center (EMTEC) Place: Dayton, Ohio Zip: 45420 Product: String representation "A...

  6. Arc Casting Intermetallic Alloy (Materials Preparation Center)

    SciTech Connect

    2010-01-01

    Arc casting of intermetallic (La-Ni-Sn) AB5 alloy used for metal hydride hydrogen storage. Upon solidification the Sn is partially rejected and increases in concentration in the remaining liquid. Upon completing solidification there is a great deal of internal stress in the ingot. As the ingot cools further the stress is relieved. This material was cast at the Ames Laboratorys Materials Preparation Center http://www.mpc.ameslab.gov

  7. Magnetic refrigeration apparatus with belt of ferro or paramagnetic material

    DOEpatents

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

    1986-04-03

    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.

  8. Magnetic refrigeration apparatus with belt of ferro or paramagnetic material

    DOEpatents

    Barclay, John A.; Stewart, Walter F.; Henke, Michael D.; Kalash, Kenneth E.

    1987-01-01

    A magnetic refrigerator operating in the 12 to 77K 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.

  9. A Look Inside Argonne's Center for Nanoscale Materials | Argonne National

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Laboratory A Look Inside Argonne's Center for Nanoscale Materials Share Topic Programs Materials science Nanoscience

  10. Energy Materials Center at Cornell: Final Report

    SciTech Connect

    Abruña, Héctor; Mutolo, Paul F

    2015-01-02

    The mission of the Energy Materials Center at Cornell (emc2) was to achieve a detailed understanding, via a combination of synthesis of new materials, experimental and computational approaches, of how the nature, structure, and dynamics of nanostructured interfaces affect energy conversion and storage with emphasis on fuel cells, batteries and supercapacitors. Our research on these systems was organized around a full system strategy for; the development and improved performance of materials for both electrodes at which storage or conversion occurs; understanding their internal interfaces, such as SEI layers in batteries and electrocatalyst supports in fuel cells, and methods for structuring them to enable high mass transport as well as high ionic and electronic conductivity; development of ion-conducting electrolytes for batteries and fuel cells (separately) and other separator components, as needed; and development of methods for the characterization of these systems under operating conditions (operando methods) Generally, our work took industry and DOE report findings of current materials as a point of departure to focus on novel material sets for improved performance. In addition, some of our work focused on studying existing materials, for example observing battery solvent degradation, fuel cell catalyst coarsening or monitoring lithium dendrite growth, employing in operando methods developed within the center.

  11. Executive Summaries for the Hydrogen Storage Materials Center...

    Energy.gov [DOE] (indexed site)

    storage materials in the areas of Chemical Hydrogen Storage Materials, Hydrogen ... Storage Materials Center of Excellence - Chemical Hydrogen Storage CoE, Hydrogen Sorption ...

  12. Electronic & Magnetic Materials & Devices Capabilities | Argonne...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Electronic & Magnetic Materials & Devices Capabilities Synthesis Colloidal chemistry and self-assembly techniques Complex oxide film synthesis via molecular beam epitaxy (DCA R450...

  13. Hazardous materials (HAZMAT) Spill Center strategic plan

    SciTech Connect

    1996-01-01

    This strategic Plan was developed in keeping with the Department of Energy`s mission for partnership with its customers to contribute to our Nation`s welfare by providing the technical information and the scientific and educational foundation for the technology, policy and institutional leadership necessary to achieve efficiency in energy use, diversity in energy sources, a more productive and competitive economy, improved environmental quality, and a secure national defense. The Plan provides the concepts for realigning the Departments`s Hazardous Materials Spill Center (HSC) in achieving its vision of becoming the global leader in meeting the diverse HAZMAT needs in the areas of testing, training, and technology. Each of these areas encompass many facets and a multitude of functional and operational requirements at the Federal, state, tribal, and local government levels, as well as those of foreign governments and the private sector. The evolution of the limited dimensional Liquefied Gaseous Fuels Spill Test Facility into a multifaceted HAZMAT Spill Center will require us to totally redefine our way of thinking as related to our business approach, both within and outside of the Department. We need to establish and maintain a viable and vibrant outreach program through all aspects of the public (via government agencies) and private sectors, to include foreign partnerships. The HAZMAT Spill Center goals and objectives provide the direction for meeting our vision. This direction takes into consideration the trends and happenings identified in the {open_quotes}Strategic Outlook{close_quotes}, which includes valuable input from our stakeholders and our present and future customers. It is our worldwide customers that provide the essence of the strategic outlook for the HAZMAT Spill Center.

  14. Center for Next Generation of Materials by Design: Incorporating

    Office of Science (SC)

    Metastability (CNGMD) | U.S. DOE Office of Science (SC) Center for Next Generation of Materials by Design: Incorporating Metastability (CNGMD) Energy Frontier Research Centers (EFRCs) EFRCs Home Centers EFRC External Websites Research Science Highlights News & Events Publications History Contact BES Home Centers Center for Next Generation of Materials by Design: Incorporating Metastability (CNGMD) Print Text Size: A A A FeedbackShare Page CNGMD Header Director William Tumas Lead

  15. Herty Advanced Materials Development Center | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Herty Advanced Materials Development Center Herty Advanced Materials Development Center Session 1-B: Advancing Alternative Fuels for the Military and Aviation Sector Breakout Session 1: New Developments and Hot Topics Jill Stuckey, Acting Director, Herty Advanced Materials Development Center b13_stuckey_2-b.pdf (2.33 MB) More Documents & Publications Center of Innovation - Energy Biomass 2013: Breakout Speaker Biographies Biomass 2013 Agenda

  16. Center for Nanophase Materials Sciences (CNMS) - Nanomaterials...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    of magnetic nanosystems. Additionally, support of classical atomistic and coarse-grained molecular dynamics methods as well as self-consistent field theoretic approaches are also...

  17. Center for the Computational Design of Functional Layered Materials (CCDM)

    Office of Science (SC)

    | U.S. DOE Office of Science (SC) the Computational Design of Functional Layered Materials (CCDM) Energy Frontier Research Centers (EFRCs) EFRCs Home Centers EFRC External Websites Research Science Highlights News & Events Publications History Contact BES Home Centers Center for the Computational Design of Functional Layered Materials (CCDM) Print Text Size: A A A FeedbackShare Page CCDM Header Director John Perdew Lead Institution Temple University Year Established 2014 Mission To

  18. Exploring nanoscale magnetism in advanced materials with polarized...

    Office of Scientific and Technical Information (OSTI)

    Exploring nanoscale magnetism in advanced materials with polarized X-rays Citation Details In-Document Search Title: Exploring nanoscale magnetism in advanced materials with ...

  19. Probing nanoscale behavior of magnetic materials with soft x...

    Office of Scientific and Technical Information (OSTI)

    Probing nanoscale behavior of magnetic materials with soft x-ray spectromicroscopy Citation Details In-Document Search Title: Probing nanoscale behavior of magnetic materials with soft ...

  20. Center for Nanophase Materials Sciences - Conference 2015

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    highly promising approach to expedite the materials discovery process using theory-guided electronic and structural engineering. This roundtable will bring together materials...

  1. GATE Center of Excellence in Lightweight Materials and Manufacturing

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Technologies | Department of Energy Lightweight Materials and Manufacturing Technologies GATE Center of Excellence in Lightweight Materials and Manufacturing Technologies 2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting ti026_vaidya_2012_p.pdf (4.01 MB) More Documents & Publications GATE Center of Excellence at UAB in Lightweight Materials for Automotive Applications GATE Center of Excellence in Lightweight

  2. Center for Nanophase Materials Sciences (CNMS) - Publications

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    in Good Solvent," Soft Matter 5 (9), 1897-1904 (2009). Arenholz, E.; van der Laan, G.; Yang, F.; Kemik, N.; Biegalski, M. D.; Christen, H. M.; Takamura, Y, "Magnetic Structure of...

  3. GATE Center of Excellence in Lightweight Materials and Manufacturing...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Technologies Vehicle Technologies Office Merit Review 2014: GATE Center of Excellence at UAB for Lightweight Materials and Manufacturing for Automotive, Truck and Mass Transit...

  4. SciDAC Outreach Center Participates in "Materials for Energy...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Center Participates in "Materials for Energy Applications" Workshop February 1, 2012 David Skinner From Jan. 30 to Feb. 1 Berkeley Lab hosted an invitation-only workshop on...

  5. Center for Nanophase Materials Sciences (CNMS) - CNMS Research

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Micronanofabricated environments for synthetic biology C. Patrick Collier and Michael L. Simpson Nanofabrication Research Laboratory, Center for Nanophase Materials Sciences Oak...

  6. Center for Nanophase Materials Sciences - Summer Newsletter 2010

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    1 Department of Chemistry, Vanderbilt University, Station B 351824, Nashville, TN 37235, USA 2 Center for Nanophase Materials Sciences at Oak Ridge National Laboratory, 1 Bethel...

  7. Center for Nanophase Materials Sciences (CNMS) - CNMS Research

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    AL 35487 (USA) 2-Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831 (USA) 3-Department of Chemistry, University of Kentucky,...

  8. Magnetic spectroscopy and microscopy of functional materials

    SciTech Connect

    Jenkins, C.A.

    2011-01-28

    Heusler intermetallics Mn{sub 2}Y Ga and X{sub 2}MnGa (X; Y =Fe, Co, Ni) undergo tetragonal magnetostructural transitions that can result in half metallicity, magnetic shape memory, or the magnetocaloric effect. Understanding the magnetism and magnetic behavior in functional materials is often the most direct route to being able to optimize current materials for todays applications and to design novel ones for tomorrow. Synchrotron soft x-ray magnetic spectromicroscopy techniques are well suited to explore the the competing effects from the magnetization and the lattice parameters in these materials as they provide detailed element-, valence-, and site-specifc information on the coupling of crystallographic ordering and electronic structure as well as external parameters like temperature and pressure on the bonding and exchange. Fundamental work preparing the model systems of spintronic, multiferroic, and energy-related compositions is presented for context. The methodology of synchrotron spectroscopy is presented and applied to not only magnetic characterization but also of developing a systematic screening method for future examples of materials exhibiting any of the above effects. The chapter progression is as follows: an introduction to the concepts and materials under consideration (Chapter 1); an overview of sample preparation techniques and results, and the kinds of characterization methods employed (Chapter 2); spectro- and microscopic explorations of X{sub 2}MnGa/Ge (Chapter 3); spectroscopic investigations of the composition series Mn{sub 2}Y Ga to the logical Mn{sub 3}Ga endpoint (Chapter 4); and a summary and overview of upcoming work (Chapter 5). Appendices include the results of a Think Tank for the Graduate School of Excellence MAINZ (Appendix A) and details of an imaging project now in progress on magnetic reversal and domain wall observation in the classical Heusler material Co{sub 2}FeSi (Appendix B).

  9. Final Technical Progress Report NANOSTRUCTURED MAGNETIC MATERIALS

    SciTech Connect

    Charles M. Falco

    2012-09-13

    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.

  10. Center for Nanophase Materials Sciences (CNMS) - Themes

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    is home to our synthetic macromolecular capabilities and our complementary efforts in designing functional materials, including those with hybrid molecular architectures, for...

  11. Center for Nanophase Materials Sciences (CNMS) - Nanofabrication...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    clean room space for carrying out material modification using advanced lithographic, etching, thin-film deposition, and characterization tools. Process Design Assistance with...

  12. Center for Nanophase Materials Sciences (CNMS) - News

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    ... "ORNL materials researchers get first look at atom-thin boundaries," Space Daily (November 11, 2014) "UT, ORNL Team Up in Possible Spintronics Advancement," Tennessee Today ...

  13. Center for Nanophase Materials Sciences - Newsletter

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    can provide insights for the development of new materials for solar cells, solid-state lighting and superconductor power transmission. Computer codes will be made...

  14. 2009 > Publications > Research > The Energy Materials Center...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    sols Morgan Stefik, Surbhi Mahajan, Hiroaki Sai, Thomas H. Epps III, Frank S. Bates, Sol M. Gruner, Francis J. DiSalvo and Ulrich Wiesner Chemistry of Materials Vol.21, p....

  15. Center for Nanophase Materials Sciences - Newsletter January...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    were recently purchased with American Recovery and Reinvestment Act funds, including new SEM and TEMSTEM capabilities for soft materials, small-angle x-ray scattering, and in the...

  16. Featured Projects: Center for Materials at Irradiation and Mechanical

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Extremes: Los Alamos Lab About CMIME The Center for Materials at Irradiation and Mechanical Extremes (CMIME) is a Department of Energy (DOE) Energy Frontier Research Center (EFRC) designed to understand, at the atomic scale, the behavior of materials subject to extreme radiation doses and mechanical stress in order to synthesize new materials that can tolerate such conditions. It is a collaborative effort led by Los Alamos National Laboratory (LANL) that includes the Massachusetts Institute

  17. EFRC - Center for Defect Physics in Structural Materials | The Ames

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Laboratory EFRC - Center for Defect Physics in Structural Materials Research Personnel Publications Modeling This project will help incorporate our new, efficient, order-N (where N is the number of scattering sites in a defected crystal) method for solving the Poisson's equation for site-centered electronic-structure method used within the center (i.e., the LSMS code) for critical simulations. The method will be extended in collaboration to develop capabilities for relaxation by atomic

  18. Center for Nanophase Materials Sciences (CNMS) - CNMS User Research

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Rouleau,3 Karren L. More,5 G. Tayhas R. Palmore,2 and Robert H. Hurt2 1-Dept Chemistry, Brown University 2-School of Engineering, Brown University 3-Center for Nanophase Materials...

  19. Center for Nanoscale Materials Fact Sheet | Argonne National Laboratory

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Fact Sheet The Center for Nanoscale Materials at Argonne National Laboratory is a premier user facility providing expertise, instruments, and infrastructure for interdisciplinary nanoscience and nanotechnology research. Academic, industrial, and international researchers can access the center through its user program for both nonproprietary and proprietary research. PDF icon CNM_fact_sheet

  20. Materials Preparation Center turns 35 | The Ames Laboratory

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Materials Preparation Center turns 35 Jacob Fischer, undergraduate research assistant, prepares the injection casting system for operation. The injection casting system is used to study the solidification behavior of alloys by rapidly solidifying ingots with diameters on the order of 1-2mm. After 35 years of producing research and developmental quantities of metals for internal Ames Laboratory, university, industry, and government facilities, the Materials Preparation Center (MPC) has developed

  1. Center for Materials at Irradiation and Mechanical Extremes: Los National

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Alamos Laboratory Nastasi image of George Gray Contact Information Professor, University of Nebraska-Lincoln Email: Mike Nastasi Phone: 402-472-3852 Bio Education Ph.D., Materials Science and Engineering, Cornell University, 1986 M.S., Materials Science and Engineering, Cornell University, 1983 B.S., Materials Science and Engineering, Cornell University, 1981 Research and Professional Experience Director, Center for Materials at Irradiation and Mechanical Extremes, 2009-present Nano

  2. Center for Intelligent Fuel Cell Materials Design

    SciTech Connect

    Santurri, P.R.,; Hartmann-Thompson, C.; Keinath, S.E.

    2008-08-26

    The goal of this work was to develop a composite proton exchange membrane utilizing 1) readily available, low cost materials 2) readily modified and 3) easily processed to meet the chemical, mechanical and electrical requirements of high temperature PEM fuel cells. One of the primary goals was to produce a conducting polymer that met the criteria for strength, binding capability for additives, chemical stability, dimensional stability and good conductivity. In addition compatible, specialty nanoparticles were synthesized to provide water management and enhanced conductivity. The combination of these components in a multilayered, composite PEM has demonstrated improved conductivity at high temperatures and low humidity over commercially available polymers. The research reported in this final document has greatly increased the knowledge base related to post sulfonation of chemically and mechanically stable engineered polymers (Radel). Both electrical and strength factors for the degree of post sulfonation far exceed previous data, indicating the potential use of these materials in suitable proton exchange membrane architectures for the development of fuel cells. In addition compatible, hydrophilic, conductive nano-structures have been synthesized and incorporated into unique proton exchange membrane architectures. The use of post sulfonation for the engineered polymer and nano-particle provide cost effective techniques to produce the required components of a proton exchange membrane. The development of a multilayer proton exchange membrane as described in our work has produced a highly stable membrane at 170°C with conductivities exceeding commercially available proton exchange membranes at high temperatures and low humidity. The components and architecture of the proton exchange membrane discussed will provide low cost components for the portable market and potentially the transportation market. The development of unique components and membrane architecture

  3. A Look Inside Argonne's Center for Nanoscale Materials

    ScienceCinema

    Divan, Ralu; Rosenthal, Dan; Rose, Volker; Wai Hla, Saw; Liu, Yuzi

    2014-09-15

    At a very small, or "nano" scale, materials behave differently. The study of nanomaterials is much more than miniaturization - scientists are discovering how changes in size change a material's properties. From sunscreen to computer memory, the applications of nanoscale materials research are all around us. Researchers at Argonne's Center for Nanoscale Materials are creating new materials, methods and technologies to address some of the world's greatest challenges in energy security, lightweight but durable materials, high-efficiency lighting, information storage, environmental stewardship and advanced medical devices.

  4. A Look Inside Argonne's Center for Nanoscale Materials

    SciTech Connect

    Divan, Ralu; Rosenthal, Dan; Rose, Volker; Wai Hla, Saw; Liu, Yuzi

    2014-01-29

    At a very small, or "nano" scale, materials behave differently. The study of nanomaterials is much more than miniaturization - scientists are discovering how changes in size change a material's properties. From sunscreen to computer memory, the applications of nanoscale materials research are all around us. Researchers at Argonne's Center for Nanoscale Materials are creating new materials, methods and technologies to address some of the world's greatest challenges in energy security, lightweight but durable materials, high-efficiency lighting, information storage, environmental stewardship and advanced medical devices.

  5. Ames Laboratory scientists create cheaper magnetic material for...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Laboratory scientists create cheaper magnetic material for cars, wind turbines Contacts: For release: April 23, 2015 Karl A. Gschneidner, Division of Materials Sciences and...

  6. Center for Materials at Irradiation and Mechanical Extremes: Los National

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Alamos Laboratory Amit Misra IMage of Nathan Mar Contact Information Los Alamos National Laboratory Materials Physics and Applications Division Center for Integrated Nanotechnologies Phone: (505) 667-9860 amisra@lanl.gov Bio Education Ph.D. (Sep'1994), Materials Science and Engineering, University of Michigan, Ann Arbor M.S. (May 1991), Materials Science and Engineering, University of Michigan, Ann Arbor B.S. (May 1989), Metallurgical Engineering, Institute of Technology-BHU, India Research

  7. 2004 research briefs :Materials and Process Sciences Center.

    SciTech Connect

    Cieslak, Michael J.

    2004-01-01

    This report is the latest in a continuing series that highlights the recent technical accomplishments associated with the work being performed within the Materials and Process Sciences Center. Our research and development activities primarily address the materials-engineering needs of Sandia's Nuclear-Weapons (NW) program. In addition, we have significant efforts that support programs managed by the other laboratory business units. Our wide range of activities occurs within six thematic areas: Materials Aging and Reliability, Scientifically Engineered Materials, Materials Processing, Materials Characterization, Materials for Microsystems, and Materials Modeling and Simulation. We believe these highlights collectively demonstrate the importance that a strong materials-science base has on the ultimate success of the NW program and the overall DOE technology portfolio.

  8. Magnetism in Non-Traditional Materials

    SciTech Connect

    Menon, Madhu

    2013-09-17

    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

  9. SYNTHESIS AND CHARACTERIZATION OF ADVANCED MAGNETIC MATERIALS

    SciTech Connect

    Monica Sorescu

    2004-09-22

    The work described in this grant report was focused mainly on the properties of novel magnetic intermetallics. In the first project, we synthesized several 2:17 intermetallic compounds, namely Nd{sub 2}Fe{sub 15}Si{sub 2}, Nd{sub 2}Fe{sub 15}Al{sub 2}, Nd{sub 2}Fe{sub 15}SiAl and Nd{sub 2}Fe{sub 15}SiMn, as well as several 1:12 intermetallic compounds, such as NdFe{sub 10}Si{sub 2}, NdFe{sub 10}Al{sub 2}, NdFe{sub 10}SiAl and NdFe{sub 10}MnAl. In the second project, seven compositions of Nd{sub x}Fe{sub 100-x-y}B{sub y} ribbons were prepared by a melt spinning method with Nd and B content increasing from 7.3 and 3.6 to 11 and 6, respectively. The alloys were annealed under optimized conditions to obtain a composite material consisting of the hard magnetic Nd{sub 2}Fe{sub 14}B and soft magnetic {alpha}-Fe phases, typical of a spring magnet structure. In the third project, intermetallic compounds of the type Zr{sub 1}Cr{sub 1}Fe{sub 1}T{sub 0.8} with T = Al, Co and Fe were subjected to hydrogenation. In the fourth project, we performed three crucial experiments. In the first experiment, we subjected a mixture of Fe{sub 3}O{sub 4} and Fe (80-20 wt %) to mechanochemical activation by high-energy ball milling, for time periods ranging from 0.5 to 14 hours. In the second experiment, we ball-milled Fe{sub 3}O{sub 4}:Co{sup 2+} (x = 0.1) for time intervals between 2.5 and 17.5 hours. Finally, we exposed a mixture of Fe{sub 3}O{sub 4} and Co (80-20 wt %) to mechanochemical activation for time periods ranging from 0.5 to 10 hours. In all cases, the structural and magnetic properties of the systems involved were elucidated by X-ray diffraction (XRD), Moessbauer spectroscopy and hysteresis loop measurements. The four projects resulted in four papers, which were published in Intermetallics, IEEE Transactions on Magnetics, Journal of Materials Science Letters and Materials Chemistry and Physics. The contributions reveal for the first time in literature the effect of

  10. rare earth magnets | Critical Materials Institute

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    magnets mlthach's picture Magnetic moments: 3D printers promise better, cheaper and more powerful magnets Submitted by mlthach on Thu, 11/17/2016 - 12:35 Article on two recent papers about 3D printing of magnets -- one is CMI-funded research based at Oak Ridge National Laboratory Tags: rare earth magnets Read more about Magnetic moments: 3D printers promise better, cheaper and more powerful magnets Subscribe to RSS - rare earth magnets

  11. REACT: Alternatives to Critical Materials in Magnets

    SciTech Connect

    2012-01-01

    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.

  12. Apparatus for magnetic separation of paramagnetic and diamagnetic material

    DOEpatents

    Doctor, R.D.

    1986-07-24

    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 quadrupole 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. 5 figs.

  13. Apparatus for magnetic separation of paramagnetic and diamagnetic material

    DOEpatents

    Doctor, R.D.

    1988-10-18

    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 quadrupole 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. 5 figs.

  14. Apparatus for magnetic separation of paramagnetic and diamagnetic material

    DOEpatents

    Doctor, Richard D.

    1988-01-01

    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.

  15. Magnetic filtration process, magnetic filtering material, and methods of forming magnetic filtering material

    DOEpatents

    Taboada-Serrano, Patricia; Tsouris, Constantino; Contescu, Cristian I; McFarlane, Joanna

    2013-10-08

    The present invention provides magnetically responsive activated carbon, and a method of forming magnetically responsive activated carbon. The method of forming magnetically responsive activated carbon typically includes providing activated carbon in a solution containing ions of ferrite forming elements, wherein at least one of the ferrite forming elements has an oxidation state of +3 and at least a second of the ferrite forming elements has an oxidation state of +2, and increasing pH of the solution to precipitate particles of ferrite that bond to the activated carbon, wherein the activated carbon having the ferrite particles bonded thereto have a positive magnetic susceptibility. The present invention also provides a method of filtering waste water using magnetic activated carbon.

  16. Magnetic Material for PM Motors | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Magnetic Material for PM Motors Magnetic Material for PM Motors 2009 DOE Hydrogen Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting, May 18-22, 2009 -- Washington D.C. pmp_23_anderson.pdf (2.23 MB) More Documents & Publications Permanent Magnet Development for Automotive Traction Motors Vehicle Technologies Office: 2009 Propulsion Materials R&D Annual Progress Report Iver Anderson, Division of Materials Sciences and Engineering, The Ames Laboratory,

  17. Energy Frontier Research Center, Center for Materials Science of Nuclear Fuels

    SciTech Connect

    Todd R. Allen

    2011-12-01

    This is a document required by Basic Energy Sciences as part of a mid-term review, in the third year of the five-year award period and is intended to provide a critical assessment of the Center for Materials Science of Nuclear Fuels (strategic vision, scientific plans and progress, and technical accomplishments).

  18. Center for Nanophase Materials Sciences (CNMS) | U.S. DOE Office of Science

    Office of Science (SC)

    (SC) Nanophase Materials Sciences (CNMS) Scientific User Facilities (SUF) Division SUF Home About User Facilities X-Ray Light Sources Neutron Scattering Facilities Nanoscale Science Research Centers (NSRCs) Center for Functional Nanomaterials (CFN) Center for Integrated Nanotechnologies (CINT) Center for Nanophase Materials Sciences (CNMS) Center for Nanoscale Materials (CNM) The Molecular Foundry (TMF) Projects Accelerator & Detector Research Science Highlights Principal Investigators'

  19. Center for Nanoscale Materials (CNM) | U.S. DOE Office of Science (SC)

    Office of Science (SC)

    Nanoscale Materials (CNM) Scientific User Facilities (SUF) Division SUF Home About User Facilities X-Ray Light Sources Neutron Scattering Facilities Nanoscale Science Research Centers (NSRCs) Center for Functional Nanomaterials (CFN) Center for Integrated Nanotechnologies (CINT) Center for Nanophase Materials Sciences (CNMS) Center for Nanoscale Materials (CNM) The Molecular Foundry (TMF) Projects Accelerator & Detector Research Science Highlights Principal Investigators' Meetings BES Home

  20. Final Report: Stability and Novel Properties of Magnetic Materials...

    Office of Scientific and Technical Information (OSTI)

    Final Report: Stability and Novel Properties of Magnetic Materials and Ferromagnet Insulator Interfaces Citation Details In-Document Search Title: Final Report: Stability and ...

  1. CMI Magnet 101 | Critical Materials Institute

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Magnet 101 At the beginning of the CMI webinar on Sept. 21, CMI researcher Parans Paranthaman described general information about magnets. This video clip from the webinar is 7:31.60. The full webinar archive file includes more introduction of Parans, and goes into detail on CMI research related to magnets. This webpage has links to the full webinar and other CMI webinars

  2. Staff > Center Alumni > The Energy Materials Center at Cornell

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Center Alumni Page 1 of 3 ⇐ Previous | Next ⇒ Here are past members and where they are now. List Image Mahmut Aksit Senior Materials Chemist - 3M ma573@cornell.edu List Image Nicole Benedek Asst. Professor - UT Austin nicole.benedek@austin.utexas.edu List Image Robert Berger Asst. Professor - Western Washington University robert.berger@wwu.edu List Image Turan Birol Postdoc - Rutgers University tb238@cornell.edu List Image Raymond Burns Product Research Technologist - Exxon Mobile

  3. Microporous magnets | Center for Gas SeparationsRelevant to Clean...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Microporous magnets Previous Next List Pierre Dechambenoit and Jeffrey R. Long, Chem. Soc. Rev., 2011,40, 3249-3265 DOI: 10.1039C0CS00167H Graphical abstract: Microporous magnets...

  4. Electronic & Magnetic Materials & Devices | Argonne National...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    laser spectroscopy, molecular beam epitaxy, and novel approaches for hybrid, organic and nanoparticle materials synthesis. Research activities include: Low-dimensional materials...

  5. Experimental Characterization of Magnetic Materials for the Magnetic Shielding of Cryomodules in Particle Accelerators

    DOE PAGES [OSTI]

    Sah, Sanjay; Myneni, Ganapati; Atulasimha, Jayasimha

    2016-02-01

    The magnetic properties of two important passive magnetic shielding materials (A4K and Amumetal) for accelerator applications, subjected to various processing and heat treatment conditions are studied comprehensively over a wide range of temperatures: from cryogenic to room temperature. We analyze the effect of processing on the extent of degradation of the magnetic properties of both materials and investigate the possibility of restoring these properties by reannealing.

  6. Experimental characterization of magnetic materials for the magnetic shielding of cryomodules in particle accelerators

    SciTech Connect

    Sah, Sanjay; Myneni, Ganapati; Atulasimha, Jayasimha

    2015-10-26

    The magnetic properties of two important passive magnetic shielding materials (A4K and Amumetal) for accelerator applications, subjected to various processing and heat treatment conditions are studied comprehensively over a wide range of temperatures: from cryogenic to room temperature. Furthermore, we analyze the effect of processing on the extent of degradation of the magnetic properties of both materials and investigate the possibility of restoring these properties by re-annealing.

  7. Feed Materials Production Center annual environmental report for calendar 1989

    SciTech Connect

    Dugan, T.A.; Gels, G.L.; Oberjohn, J.S.; Rogers, L.K.

    1990-10-01

    The mission of the Department of Energy's (DOE) Feed Materials Production Center (FMPC) has been to process uranium for United States' defense programs. On July 10, 1989, the FMPC suspended production operations, but remains on standby for certain segments of production. The FMPC also manages the storage of some radioactive and hazardous materials. As part of its operations, the FMPC continuously monitors the environment to determine that it is operating within federal and state standards and guidelines regarding emission of radioactive and nonradioactive materials. Data collected from the FMPC monitoring program are used to calculate estimates of radiation dose for residents due to FMPC operations. For 1989, the estimate of dose through the air pathway, excluding radon, indicated that people in the area were exposed to less than 6% of the DOE guideline established to protect the public from radiation exposure. When radon emissions are included, the dose from FMPC operations during 1989 was less than 22% of the annual background radiation dose in the Greater Cincinnati area. This report is a summary of FMPC's environmental activities and monitoring program for 1989. An Environmental Compliance Self-Assessment presents the FMPC's efforts to comply with environmental regulations through June 1990. 44 refs., 48 figs.

  8. Critical Magnetic Field Determination of Superconducting Materials

    SciTech Connect

    Canabal, A.; Tajima, T.; Dolgashev, V.A.; Tantawi, S.G.; Yamamoto, T.; /Tsukuba, Natl. Res. Lab. Metrol.

    2011-11-04

    Superconducting RF technology is becoming more and more important. With some recent cavity test results showing close to or even higher than the critical magnetic field of 170-180 mT that had been considered a limit, it is very important to develop a way to correctly measure the critical magnetic field (H{sup RF}{sub c}) of superconductors in the RF regime. Using a 11.4 GHz, 50-MW, <1 {mu}s, pulsed power source and a TE013-like mode copper cavity, we have been measuring critical magnetic fields of superconductors for accelerator cavity applications. This device can eliminate both thermal and field emission effects due to a short pulse and no electric field at the sample surface. A model of the system is presented in this paper along with a discussion of preliminary experimental data.

  9. Extraordinary Responsive Rare Earth Magnetic Materials | The Ames

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Laboratory Extraordinary Responsive Rare Earth Magnetic Materials Research Personnel Updates Publications Synthesis Responsive systems, where a small change of an extrinsic thermodynamic variable, such as temperature, pressure, or magnetic field, triggers an intrinsic phase change, have both fundamental and technological significance. Alloys and compounds that exhibit strong field-, temperature-, or pressure-controlled reactions, tunable by chemistry, crystallography, and processing, provide

  10. Modeling Magnetism in Rare-Earth Intermetallic Materials | The...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Modeling Magnetism in Rare-Earth Intermetallic Materials Theoretical modeling has led to a ... Rare-earth elements are unique in that their cores hold strongly localized electrons that ...

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

    DOEpatents

    Haskel, Daniel; Lang, Jonathan C.; Srajer, George

    2008-07-22

    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.

  12. Electromagnetic valve for controlling the flow of molten, magnetic material

    DOEpatents

    Richter, Tomas

    1998-01-01

    An electromagnetic valve for controlling the flow of molten, magnetic material is provided, which comprises an induction coil for generating a magnetic field in response to an applied alternating electrical current, a housing, and a refractory composite nozzle. The nozzle is comprised of an inner sleeve composed of an erosion resistant refractory material (e.g., a zirconia ceramic) through which molten, magnetic metal flows, a refractory outer shell, and an intermediate compressible refractory material, e.g., unset, high alumina, thermosetting mortar. The compressible refractory material is sandwiched between the inner sleeve and outer shell, and absorbs differential expansion stresses that develop within the nozzle due to extreme thermal gradients. The sandwiched layer of compressible refractory material prevents destructive cracks from developing in the refractory outer shell.

  13. Electromagnetic valve for controlling the flow of molten, magnetic material

    DOEpatents

    Richter, T.

    1998-06-16

    An electromagnetic valve for controlling the flow of molten, magnetic material is provided, which comprises an induction coil for generating a magnetic field in response to an applied alternating electrical current, a housing, and a refractory composite nozzle. The nozzle is comprised of an inner sleeve composed of an erosion resistant refractory material (e.g., a zirconia ceramic) through which molten, magnetic metal flows, a refractory outer shell, and an intermediate compressible refractory material, e.g., unset, high alumina, thermosetting mortar. The compressible refractory material is sandwiched between the inner sleeve and outer shell, and absorbs differential expansion stresses that develop within the nozzle due to extreme thermal gradients. The sandwiched layer of compressible refractory material prevents destructive cracks from developing in the refractory outer shell. 5 figs.

  14. Postdoctoral Research Fellow Center for Nanophase Materials Sciences

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    & transport properties of the materials, which in turn can be used to engineer better solid electrolyte materials 2. Automation & Data Analytics * Designing a new material for...

  15. Environmental Survey preliminary report, Feed Materials Production Center, Fernald, Ohio

    SciTech Connect

    Not Available

    1987-03-01

    This report presents the preliminary findings from the first phase of the environmental survey of the United States Department of Energy (DOE) Feed Materials Production Center (FMPC), conducted June 16 through 27, 1986. The survey is being conducted by an interdisciplinary team of environmental specialists, led and managed by the Office of Environment, Safety and Health's Office of Environmental Audit. Individual team components are being supplied by a private contractor. The objective of the survey is to identify environmental problems and areas of environmental risk associated with the FMPC. The survey covers all environmental media and all areas of environmental regulation. It is being performed in accordance with the DOE Environmental Survey Manual. This phase of the survey involves the review of existing site environmental data, observations of the operations carried on at FMPC, and interviews with site personnel. The survey team developed a Sampling and Analysis Plan to assist in further assessing certain of the environmental problems identified during its onsite activities. The Sampling and Analysis Plan will be executed by a DOE national laboratory or a support contractor. When completed, the results will be incorporated into the FMPC Environmental Survey Interim Report. The Interim Report will reflect the final determinations of the FMPC survey. 41 refs., 20 figs., 25 tabs.

  16. Center for Nanophase Materials Sciences (CNMS) - Imaging Functionality...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Ambient Scanning Probe Microscopy Magnetic Force Microscopy Electrical Force Microscopy Kelvin Probe Force Microscopy Conductive Atomic Force Microscopy Heated tip (blueDrive)...

  17. Center for Defect Physics in Structural Materials - CDP

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    LLNL Research Atomic and magnetic interactions treated using ab initio density functional theory (DFT). Quantum Monte Carlo (QMC) calculations of defect structures and energetics...

  18. QMC simulations reveal magnetic properties of titanium oxide material |

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Argonne Leadership Computing Facility QMC simulations reveal magnetic properties of titanium oxide material Author: Katie Jones November 10, 2016 Facebook Twitter LinkedIn Google E-mail Printer-friendly version By running computationally intensive quantum Monte Carlo simulations at the Argonne Leadership Computing Facility (ALCF), a U.S. Department of Energy (DOE) Office of Science User Facility, researchers have demonstrated the ability to accurately calculate the magnetic properties of a

  19. Rare-earth-free magnet made from cheap materials

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Rare-earth-free magnet Rare-earth-free magnet made from cheap materials Researchers create a powerful permanent magnet out of iron and nitrogen as part of a program to cut the need for rare-earth metals May 17, 2016 Mars (a) 2 × 1016/cm2 fluence, embedded dots can be observed (rich N region), with a diameter of 20 nm, separated by 140 to 200 nm; (b) 8 × 1016/cm2 fluence, besides embedded dots, obvious cracks appeared; (c) 1 × 1017/cm2 fluence, an obvious microstructure is generated, with

  20. Staff > > The Energy Materials Center at Cornell

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    People Leadership Team Faculty Directory Researchers, Postdocs & Graduates Scientific Advisory Board Center Alumni Here are past members and where they are now.

  1. Center for Materials at Irradiation and Mechanical Extremes:...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    In theoretical research, skills in atomistic modeling are required. US citizenship is not required. Want more info? Interested candidates may contact the Center's co-directors at ...

  2. Scientific Advisory Board | Center for Energy Efficient Materials

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    ... the company's U.S. Advanced R&D Center and created ... research in the areas of microstructures and nanotechnology. Waguih has authored about 80 journal and ...

  3. Center for Materials at Irradiation and Mechanical Extremes:...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Related EFRC News What are EFRCs? Energy Frontier Research Centers address energy and science "grand challenges" in a broad range of research areas, which were defined through a...

  4. Young scientist discovers magnetic material unnecessary to create spin

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    current | Argonne National Laboratory Young scientist discovers magnetic material unnecessary to create spin current By Carla Reiter * July 23, 2015 Tweet EmailPrint It doesn't happen often that a young scientist makes a significant and unexpected discovery, but postdoctoral researcher Stephen Wu of the U.S. Department of Energy's Argonne National Laboratory just did exactly that. What he found-that you don't need a magnetic material to create spin current from insulators-has important

  5. Ames Laboratory a partner in DOE Center for Computational Materials...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    materials, as well as a companion database to predict targeted properties with energy-related application to thermoelectric materials. READ MORE at Brookhaven National Laboratory....

  6. Center for Materials at Irradiation and Mechanical Extremes:...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    damage in materials Materials modification and synthesis through ion implantation ... Y. Q. Wang, L. B. Bridwell, and R. E. Giedd, "Modification of Polymers by Ion ...

  7. Héctor D. Abruña > Director, Energy Materials Center at Cornell...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Director, Energy Materials Center at Cornell Emile M. Chamot Professor Chemistry and Chemical Biology Research Group Webpage hda1@cornell.edu Professor Abrua, Emile M. Chamot ...

  8. Materials Down Select Decisions Made Within the Department of Energy Hydrogen Sorption Center of Excellence

    Publication and Product Library

    Technical report describing DOE's Hydrogen Sorption Center of Excellence investigation into various adsorbent and chemisorption materials and progress towards meeting DOE's hydrogen storage targets. T

  9. Applied magnetism: A supply-driven materials challenge

    DOE PAGES [OSTI]

    Rios, Orlando; McCall, Scott K.

    2016-05-27

    Permanent magnets are important in many green energy technologies including wind turbine generators and hybrid-electric vehicle motors. For these applications, volume and weight are important factors driving the overall design, and therefore a high energy density, or energy product, is an important figure of merit. This quantity defines the magnetic energy contained in a given volume of material, and so higher energy density magnets enable smaller, lighter applications. Currently, the most powerful magnets suitable for commercial purposes contain rare earth elements (REE), usually neodymium and dysprosium in the neodymium-iron-boride class of magnets. However, for select applications, often requiring high temperatures,more » samarium cobalt is the alloy of choice. These magnets have energy densities several times greater than their nearest non-REE-based competitor, which for some applications is the defining factor in creating a viable device. The global supply of these REE is overwhelmingly produced in China, which in 2015 mined more than ten times as much as the next largest producer (Australia). Such market domination effectively creates a single source of supply, leaving industries which rely on REE consumption susceptible to price shocks and supply disruptions of these critical materials. Furthermore, this supply sensitivity may act as a drag on the adaptation rate of green energy technologies, particularly for large-scale users.« less

  10. News > > The Energy Materials Center at Cornell

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    News + Events In This Section Why Partnerships? Current Partners Project Updates News & Events Resources Join News EMC2 News Center news updates 37 entries Archived News Stories Previous news stories from emc2 97 entries Home » News

  11. Center for Nanophase Materials Sciences (CNMS) - CNMS Research

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    a whole new family of previously unknown electronic properties. Credit Published in Nano Letters, DOI: 10.1021nl203349b. Research at Oak Ridge National Laboratory's Center for...

  12. Center for Nanophase Materials Sciences (CNMS) - Archived CNMS...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    ARCHIVED CNMS IN THE NEWS Sergei V. Kalinin Wins ACerS Robert L. Coble Award for Young Scholars Sergei V. Kalinin, who is a member of the Imaging Functionality Group in the Center...

  13. Center for Nanophase Materials Sciences (CNMS) - CNMS Research

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Standing Friedel Waves, Standing Spin Waves, and Indirect Bandgap Optical Transition in Nanostructures Jun-Qiang Lu1, X.-G. Zhang1,2, and Sokrates T. Pantelides3 1Center for...

  14. News > > The Energy Materials Center at Cornell

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    News + Events In This Section EMC2 News Archived News Stories News EMC2 News Center news updates 37 entries Archived News Stories Previous news stories from emc2 97 entries Home » News

  15. Center for Nanophase Materials Sciences (CNMS) - CNMS Research

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Expression Optimization and Synthetic Gene Networks in Cell-free Systems David K. Karig,1 Sukanya Iyer,2,3 Michael L. Simpson,1,4,5 Mitchel J. Doktycz,1,2 1-Center for Nanophase...

  16. Mahmut Aksit > Senior Materials Chemist - 3M > Center Alumni > The Energy

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Materials Center at Cornell Mahmut Aksit Senior Materials Chemist - 3M ma573@cornell.edu Formerly a member of the Robinson Group, he received his PhD in June 2014.

  17. Analysis of NSTX Upgrade OH Magnet and Center Stack

    SciTech Connect

    A. Zolfaghari, P. Titus, J. Chrzanowski, A. Salehzadeh, F. Dahlgren

    2010-11-30

    The new ohmic heating (OH) coil and center stack for the National Spherical Torus Experiment (NSTX) upgrade are required to meet cooling and structural requirements for operation at the enhanced 1 Tesla toroidal field and 2 MA plasma current. The OH coil is designed to be cooled in the time between discharges by water flowing in the center of the coil conductor. We performed resistive heating and thermal hydraulic analyses to optimize coolant channel size to keep the coil temperature below 100 C and meet the required 20 minute cooling time. Coupled electromagnetic, thermal and structural FEA analyses were performed to determine if the OH coil meets the requirements of the structural design criteria. Structural response of the OH coil to its self-field and the field from other coils was analyzed. A model was developed to analyze the thermal and electromagnetic interaction of centerstack components such as the OH coil, TF inner legs and the Bellville washer preload mechanism. Torsional loads from the TF interaction with the OH and poloidal fields are transferred through the TF flag extensions via a torque transfer coupling to the rest of the tokamak structure. A 3D FEA analysis was performed to qualify this design. The results of these analyses, which will be presented in this paper, have led to the design of OH coil and centerstack components that meet the requirements of the NSTX-upgrade structural design criteria.

  18. The Center for Nanophase Materials Sciences (Other) | SciTech...

    Office of Scientific and Technical Information (OSTI)

    National Laboratory (ORNL) integrates nanoscale science with neutron science; synthesis ... environment for research to understand nanoscale materials and phenomena. ...

  19. Center for Materials at Irradiation and Mechanical Extremes: Los National

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Alamos Laboratory Anthony David Rollett image of anthony rollet Contact Information Carnegie Mellon University Department of Materials Sci.& Eng. Wean Hall 3313, 5000 Forbes Ave. Pittsburgh, PA 15213-3890 Phone: (412) 268-3177 Email: rollett@andrew.cmu.edu Bio Education M.A. (1976), Metallurgy and Materials Science, Cambridge University, United Kingdom Ph.D. (1987) Materials Engineering, Drexel University Research and Professional Experience Professor of Materials Science &

  20. Center for Materials at Irradiation and Mechanical Extremes: Los National

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Alamos Laboratory Kenneth J. McClellan Contact Information Los Alamos National Laboratory Materials Science & Technology Division Structure/Property Relations, MS G755 Phone: (505) 667-5452 kmcclellan@lanl.gov Bio Education Ph.D., Materials Science and Engineering, Case Western Reserve University, 1994 M.S., Materials Science and Engineering, Case Western Reserve University, 1991 B.S., Metallurgy and Materials Science, Case Western Reserve University, 1988 Research and Professional

  1. Center for Materials at Irradiation and Mechanical Extremes: Los National

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Alamos Laboratory Stuart A. Maloy image of Stuart Maloy Contact Information Los Alamos National Laboratory Materials Science & Technology Division, MS H816 Phone: (505) 667-9784 maloy@lanl.gov Bio Education Ph.D., Metallurgy and Materials Science, Case Western Reserve University, 1994 M.S., Metallurgy and Materials Science, Case Western Reserve University, 1991 B.S. w/honors, Metallurgy and Materials Science, Case Western Reserve University, 1989 Lancaster University, England, 1987

  2. Argonne's Materials Engineering Research Facility - Joint Center for

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Energy Storage Research August 8, 2012, Videos Argonne's Materials Engineering Research Facility Argonne's Materials Engineering Research Facility (MERF) enables the development of manufacturing processes for producing advanced battery materials in sufficient quantity for industrial testing. The research conducted in this program is known as process scale-up

  3. Staff > Center Alumni > The Energy Materials Center at Cornell

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Center Alumni Page 2 of 3 ⇐ Previous | Next ⇒ Here are past members and where they are now. List Image Jimmy John Postdoc - California Institute of Technology jj383@cornell.edu List Image Antonios Kelarakis Sr. Researcher - University of Central Lancashire antonios.kelarakis@gmail.com List Image Graham Kerslick Associate Director - Atkins Center for Sustainable Futures gsk2@cornell.edu List Image Mihir Khadilkar Postdoc - UC Santa Barbara mihir@ucsb.edu List Image Jeung Gon Kim Principle

  4. 3-D Imaging Technique Maps DNA-Carrying Material at Center of Cells

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    3-D Imaging Technique Maps DNA-Carrying Material at Center of Cells Scientists have produced detailed 3-D visualizations that show an unexpected connectivity in the genetic material at the center of cells, providing a new understanding of a cell's evolving architecture.

  5. Center for Materials at Irradiation and Mechanical Extremes: Los National

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Alamos Laboratory - Ellen Cerreta Image of Ellen Contact Information Los Alamos National Laboratory Materials Science and Technology Division MST-8, Structure/Property Relations Group Phone: (505) 665-2576 ecerreta@lanl.gov Bio Education Ph.D. (2001), Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania M.S. (1997), Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania B.S. (1996), Aerospace Engineering, University of

  6. Center for Materials at Irradiation and Mechanical Extremes: Los National

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Alamos Laboratory Pascal Bellon image of George Gray Contact Information Professor University of Illinois, Urbana-Champaign Department of Materials Science and Engineering Phone: (217)2675-0284 bellon@uiuc.edu http://www.mse.uiuc.edu/faculty/Bellon.html Bio Education Post-Doctoral Research Associate, Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, 1993-1994 Ph.D., Materials Science, Université Pierre et Marie Curie, Paris, France, 1989

  7. Center for Materials at Irradiation and Mechanical Extremes: Los National

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Alamos Laboratory Robert S. Averback Contact Information University of Illinois at Urbana-Champaign Department of Materials Science and Engineering Donald W. Hamer Professor and Interim Department Head Phone: (217) 333-4302 averback@illinois.edu Bio Education Postdoctoral fellow in Materials Science, Cornell University, 1973 Ph.D., Physics, Michigan State University, 1966 B.S., Physics, Dickinson College, 1966 Research and Professional Experience Professor of Materials Science and

  8. Center for Inverse Design: Modality 3 - Discovery of Missing Materials

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    3: Discovery of Missing Materials Modality 3 applies to yet discovered, currently undocumented materials. This approach is designed for a different class of problems: when the materials we would like to consider are simply undocumented standard compilations, i.e., they have not yet been made. Like the other two modalities, this one also involves a search space. But unlike Modalities 1 and 2, the steps involved in Modality 3 are: Calculate the stable crystal structure of a given hypothetical

  9. Center for Nanophase Materials Sciences (CNMS) - 2014 CNMS User...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Materials Sciences Oak Ridge National Laboratory September 15-19, 2014 Chestnut Ridge Campus of Oak Ridge National Laboratory Oak Ridge, Tennessee User Meeting Announcement User...

  10. Center for Nanophase Materials Sciences (CNMS) - 2011 CNMS User...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Materials Sciences Oak Ridge National Laboratory September 19-20, 2011 Chestnut Ridge Campus of Oak Ridge National Laboratory Oak Ridge, Tennessee User Meeting Announcement User...

  11. Center for Materials at Irradiation and Mechanical Extremes:...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    a Cu 10 nm nanocrystalline sample being uni-axial compressed to strain of 20% and then stress released. Irradiation Extremes Thrust Traditional structural materials degrade and...

  12. Center for Nanophase Materials Sciences (CNMS) - 2012 CNMS User...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    on 911) Transmission Electron Microscopy for Soft Materials September 12-13, 2012 Second Photovoltaics School (Photovoltaics from Fundamentals to Applications) September 13, 2012...

  13. Center for Nanophase Materials Sciences (CNMS) - Related ORNL...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    In particular, the facilities listed on this page offer a variety of capabilities for materials characterization and computational nanoscience that may enhance the research...

  14. Center for Nanophase Materials Sciences (CNMS) - CNMS Research

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    a diverse collection of leading journals, such as Nano Letters, Advanced Materials, and ACS Nano. They have also built capabilities for nanofiber synthesis and characterization at...

  15. Center for Nanophase Materials Sciences (CNMS) - CNMS User Research

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 4-Department of Physics and Department of Electrical Engineering and Computer...

  16. Center for Nanophase Materials Sciences (CNMS) - CNMS Research

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831 2-Materials Science & Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 3-Physics Department,...

  17. Materials Project and Electrolyte Genome - Joint Center for Energy...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Developing beyond-lithium-ion batteries requires the ... some of the guesswork out of materials design for new battery systems. ... by JCESR to apply simulation techniques to liquid ...

  18. Center for Materials at Irradiation and Mechanical Extremes:...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    (CINT), Physical Synthesis Lab: J. Kevin Baldwin LANL Technologist Ion Beam Materials Lab: Yongqiang Wang LANL Scientist Irradiation Thrust Electron Microscopy Lab: Rob...

  19. Resources > Partnerships > The Energy Materials Center at Cornell

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    In This Section Why Partnerships? Current Partners Project Updates News & Events Resources Join PARTNERSHIPS Why Partnerships? ›Project Updates ›News + Events › Resources for Prospective Partners CONTENT COMING SOON Cornell Standard NDA Sample Sponsored Contract Language Standard Intellectual Property terms Center member form

  20. Design and Analyisi of a Self-centered Cold Mass Support for the MICE Coupling Magnet

    SciTech Connect

    Wang, Li; Pan, Heng; Wu, Hong; Li, S. Y.; Guo, Xing Long; Zheng, Shi Xian; Green, Michael A.

    2011-05-04

    The Muon Ionization Cooling Experiment (MICE) consists of eighteen superconducting solenoid coils in seven modules, which are magnetically hooked together since there is no iron to shield the coils and the return flux. The RF coupling coil (RFCC) module consists of a superconducting coupling solenoid mounted around four conventional conducting 201.25 MHz closed RF cavities. The coupling coil will produce up to a 2.2 T magnetic field on the centerline to keep the beam within the RF cavities. The peak magnetic force on the coupling magnet from other magnets in MICE is up to 500 kN in longitudinal direction, which will be transferred to the base of the RF coupling coil (RFCC) module through a cold mass support system. A self-centered double-band cold mass support system with intermediate thermal interruption is applied to the coupling magnet, and the design is introduced in detail in this paper. The thermal and structural analysis on the cold mass support assembly has been carried out using ANSYS. The present design of the cold mass support can satisfy with the stringent requirements for the magnet center and axis azimuthal angle at 4.2 K and fully charged.

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

    DOEpatents

    Kraus, Robert H.; Matlashov, Andrei N.; Espy, Michelle A.; Volegov, Petr L.

    2010-03-30

    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.

  2. Methane storage in advanced porous materials | Center for Gas...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Methane storage in advanced porous materials Previous Next List Trevor A. Makal, Jian-Rong Li, Weigang Lu and Hong-Cai Zhou, Chem. Soc. Rev., 2012,41, 7761-7779 DOI: 10.1039...

  3. The Materials Preparation Center - Making Rare Earth Metals - Part 3

    ScienceCinema

    Riedemann, Trevor

    2013-03-01

    Trevor Riedeman, manager of the MPC Rare Earth Materials Section, gives a presentation on the importance of rare earth metals and how they are made at Ames Laboratory. Part 3 of 4.

  4. The Materials Preparation Center - Making Rare Earth Metals - Part 4

    ScienceCinema

    Riedemann, Trevor

    2016-07-12

    Trevor Riedeman, manager of the MPC Rare Earth Materials Section, gives a presentation on the importance of rare earth metals and how they are made at Ames Laboratory. Part 4 of 4.

  5. In silico screening of carbon-capture materials | Center for...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    In silico screening of carbon-capture materials Previous Next List L.-C. Lin, A. H. Berger, R. L. Martin, J. Kim, J. A. Swisher, K. Jariwala, C. H. Rycroft, A. S. Bhown, M. W....

  6. Center for Nanophase Materials Sciences (CNMS) - CNMS Research

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    in multiferroic BiFeO3, only 2-3 nm wide and distinct from the surrounding insulating material.1 Conductivity was completely unexpected since domain walls present only a subtle...

  7. The Materials Preparation Center - Making Rare Earth Metals - Part 1

    ScienceCinema

    Riedemann, Trevor

    2016-07-12

    Trevor Riedeman, manager of the MPC Rare Earth Materials Section, gives a presentation on the importance of rare earth metals and how they are made at Ames Laboratory. Part 1 of 4.

  8. Center for Nanophase Materials Sciences (CNMS) - CNMS User Research

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    H. Weitering, Nature Materials 7, 539 (2008). The research was sponsored by the National Human Genome Research Institute, National Institutes of Health Grant R01HG002647 (CZ), NSF...

  9. Center for Nanophase Materials Sciences - Summer Newsletter 2010

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    were recently purchased with American Recovery and Reinvestment Act funds, including new SEM and TEMSTEM capabilities for soft materials, small-angle x-ray scattering, and in the...

  10. Center for Nanophase Materials Sciences (CNMS) - CNMS User Research

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Achievement: The material of choice for spintronics device today is FeMgOFe tunnel ... by modi?cation of the interface is an important topic in spintronics research. ...

  11. Carbon Dioxide Capture: Prospects for New Materials | Center...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Carbon Dioxide Capture: Prospects for New Materials Previous Next List D. M. D'Alessandro, B. Smit, and J. R. Long, Angew. Chem.-Int. Edit. 49 (35), 6058 (2010) DOI: 10.1002...

  12. The Materials Preparation Center - Making Rare Earth Metals - Part 2

    ScienceCinema

    Riedemann, Trevor

    2013-03-01

    Trevor Riedeman, manager of the MPC Rare Earth Materials Section, gives a presentation on the importance of rare earth metals and how they are made at Ames Laboratory. Part 2 of 4.

  13. Center for Materials at Irradiation and Mechanical Extremes: Los National

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Alamos Laboratory Nathan Mara IMage of Nathan Mar Contact Information Staff Scientist Los Alamos National Laboratory Metallurgy, MS G770 Phone: (505) 667-8665 Fax: (505) 667-5268 namara@lanl.gov Bio Education Ph.D., Materials Science and Eng., University of California-Davis, 2005 B.S., Mechanical Engineering and Materials Science, University of California-Davis, 2000 Research and Professional Experience Technical staff member, Los Alamos National Lab, March 2008 - present Director's

  14. Dynamic high pressure process for fabricating superconducting and permanent magnetic materials

    DOEpatents

    Nellis, William J.; Geballe, Theodore H.; Maple, M. Brian

    1988-01-01

    Shock wave formation of thin layers of materials with improved superconducting and permanent magnetic properties and improved microstructures.

  15. Materials Project - Joint Center for Energy Storage Research

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Materials Project October 1, 2015, News Articles Promising Directions and the Tools to Get Us There At the halfway point in our five-year charter, we have narrowed our research directions within the three promising energy storage concepts we are pursuing: multivalent intercalation, chemical transformation, non-aqueous redox flow. In converging these directions to proof-of-concept prototypes, we make extensive use of JCESR's distinguishing tools. Read More Chemical Transformation Electrochemical

  16. Summary 2012 Internship Projects | Center for Energy Efficient Materials

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    2 Internship Projects Name Mentor Advisor Major Project Title Benjamin Abrams Ferenc Somodi Dan Morse Physics Preparation of Silicon Containing Anode Materials for Lithium-Ion Batteries Carl Bycraft Emmett Perl John Bowers Electrical Engineering Quantum Efficiency Measurement for Multijunction Photovoltaics Benjamin Campo Nathan Pffaf Steve DenBaars Electrical Engineering Temperature Evolution of Light Emitting Diode Efficiency Rachel Harris Chris Liman Michael Chabynic Investigating Degradation

  17. Center for Materials at Irradiation and Mechanical Extremes: Los National

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Alamos Laboratory Alfredo Caro Image of Alfredo Caro Contact Information MST-8, MS G755 Los Alamos National Laboratory 505-665-2083 Bio Alfredo Caro joined Los Alamos National Laboratory in March 2010, coming from Lawrence Livermore National Lab, where he worked for seven years in fusion and fission computational materials science. While completing his Ph.D. at the Swiss Federal Institute of Technology, Caro's research covered experimental work on radiation damage; later, during his years at

  18. Center for Materials at Irradiation and Mechanical Extremes: Los National

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Alamos Laboratory Blas Uberuaga image of blas urberuaga Contact Information Technical Staff Member Los Alamos National Laboratory Materials Science and Technology Division Phone: (505) 667-9105 blas@lanl.gov Bio Education: Ph.D. in Physics, University of Washington, 2000 M.S. in Physics, University of Washington, 1996 B.A. in Physics, University of Idaho, 1994 Research and Professional Experience: Technical Staff Member, Los Alamos National Laboratory, 2004-present Postdoctoral Researcher,

  19. Center for Materials at Irradiation and Mechanical Extremes: Los National

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Alamos Laboratory George T. (Rusty) Gray III image of George Gray Contact Information Laboratory Fellow Los Alamos National Laboratory Dynamic Materials Properties, Testing, and Modeling Los Alamos, NM 87545 Phone: (505) 667-5452 rusty@lanl.gov Bio Education Ph.D. in Metallurgical Engineering, Carnegie-Mellon University, 1981 M.S. in Metallurgical Engineering, South Dakota School of Mines and Technology, 1977 B.S. in Metallurgical Engineering, South Dakota School of Mines and Technology,

  20. Center for Materials at Irradiation and Mechanical Extremes: Los National

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Alamos Laboratory Irene J. Beyerlein image of Irene Beyerlain Contact Information Los Alamos National Laboratory Theoretical Division Fluid Dynamics and Solid Mechanics Phone: (505) 665-2231 irene@lanl.gov Bio Education Ph.D., Theoretical and Applied Mechanics, Cornell University, 1997; Minors in Materials Science and Probability and Statistics B.S., Mechanical Engineering, Clemson University, 1993 Research and Professional Experience Technical Staff Member, Los Alamos National Laboratory,

  1. Center for Materials at Irradiation and Mechanical Extremes: Los National

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Alamos Laboratory Quanxi Jia image of George Gray Contact Information Laboratory Fellow Los Alamos National Laboratory Materials Physics and Applications Division Phone: (505) 667-2716 qxjia@lanl.gov Bio Education Ph.D., Electrical & Computer Engineering from SUNY at Buffalo, NY, 1991 M.S., Electronic Engineering, Jiaotong University, Xian, China, 1985 B.S., Electronic Engineering, Jiaotong University, Xian, China, 1982 Research and Professional Experience Laboratory Fellow, Los Alamos

  2. Center for Materials at Irradiation and Mechanical Extremes: Los National

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Alamos Laboratory Timothy Germann german Contact Information Los Alamos National Laboratory Theoretical Division Physics and Chemistry of Materials Group Phone: (505) 665-9772 tcg@lanl.gov Bio Education Ph.D., Chemical Physics, Harvard University, 1995 B.S., Computer Science, University of Illinois, Urbana-Champaign, 1991 B.S., Chemistry, University of Illinois, Urbana-Champaign, 1991 Research and Professional Experience Technical Staff Member, Los Alamos National Laboratory, April

  3. Staff > Center Alumni > The Energy Materials Center at Cornell

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Center Alumni Page 3 of 3 ⇐ Previous | Next ⇒ Here are past members and where they are now. List Image Eric Rus Postdoc - Brookhaven National Laboratory erus@bnl.gov List Image Jennifer Schaefer NRC Postdoctoral Fellow - National Institute of Standards and Technology List Image Katharine Silberstein Scientist - Arkema kes272@cornell.edu List Image Morgan Stefik Postdoc - École Polytechnique Fédérale de Lausanne morgan.stefik@epfl.ch List Image Chinmayee Subban Postdoc - Université de

  4. Magnetic Resonance Facility (Fact Sheet), National Bioenergy Center Laboratory Capabilities (NBCLC)

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Resonance Facility Liquid and solid-state analysis capability for a variety of biomass, photovoltaic, and materials characterization applications across NREL NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. NREL scientists analyze solid and liquid samples on three nuclear magnetic resonance (NMR) spectrometers. NREL's state-of-the-art Magnetic Resonance Facility provides: *

  5. First Principles Design of Magnetic Materials, Models, and Mechanisms...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    This projects studies the role of magnetism at the nanoscale. Magnetism is a quantum ... Magnetism arises from the combination of quantum effects and the interaction between ...

  6. Center for Materials at Irradiation and Mechanical Extremes: Los National

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Alamos Laboratory Steve Valone IMage of Steve Valone Contact Information MST-8, MS G755 Los Alamos National Laboratory 505-667-2067 Bio Steve Valone received his Ph.D. in theoretical chemistry from the University of North Carolina in 1980. In 1981, he became a Director's-funded postdoc at Los Alamos National Laboratory in the physical chemistry group; in 1984, he joined the technical staff in the Materials Science & Technology Division, where he worked on a wide variety of modeling

  7. Center for Materials at Irradiation and Mechanical Extremes: Los Alamos Lab

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Center for Materials at Irradiation and Mechanical Extremes A BES Energy Frontier Research Center Home Teams Partners Others Summer School G. R. Odette Professional Preparation Department of Mechanical Engineering and Department of Materials University of California Santa Barbara, Santa Barbara, CA 93016 odette@engineering.ucsb.edu , 805-893-3525 1965 Rensselaer Polytechnic Institute, Engineering Science, B.S.; 1968 Massachusetts Institute of Technology, Nuclear Engineering, M.S; 1971

  8. Development of Variational Guiding Center Algorithms for Parallel Calculations in Experimental Magnetic Equilibria

    SciTech Connect

    Ellison, C. Leland; Finn, J. M.; Qin, H.; Tang, William M.

    2014-10-01

    Structure-preserving algorithms obtained via discrete variational principles exhibit strong promise for the calculation of guiding center test particle trajectories. The non-canonical Hamiltonian structure of the guiding center equations forms a novel and challenging context for geometric integration. To demonstrate the practical relevance of these methods, a prototypical variational midpoint algorithm is applied to an experimental magnetic equilibrium. The stability characteristics, conservation properties, and implementation requirements associated with the variational algorithms are addressed. Furthermore, computational run time is reduced for large numbers of particles by parallelizing the calculation on GPU hardware.

  9. Magnetic preferential orientation of metal oxide superconducting materials

    DOEpatents

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

    1990-07-17

    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.

  10. Magnetic preferential orientation of metal oxide superconducting materials

    DOEpatents

    Capone, Donald W.; Dunlap, Bobby D.; Veal, Boyd W.

    1990-01-01

    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.

  11. Use of High Magnetic Field to Control Microstructural Evolution in Metallic and Magnetic Materials

    SciTech Connect

    Ludtka, G.M.; Mackiewicz- Ludtka, G.; Wilgen, J.B.; Kisner, R.A.

    2010-06-27

    The Amendment 1, referred to as Phase 2, to the original CRADA NFE-06-00414 added tasks 3 through 7 to the original statement of work that had two main tasks that were successfully accomplished in Phase 1 of this project. In this Phase 2 CRADA extension, extensive research and development activities were conducted using high magnetic field processing effects for the purpose of manipulating microstructure in the SAE 5160 steel to refine grain size isothermally and to develop nanocrystalline spacing pearlite during continuous cooling, and to enhance the formability/forgability of the non-ferrous precipitation hardening magnesium alloy AZ90 by applying a high magnetic field during deformation processing to investigate potential magnetoplasticity in this material. Significant experimental issues (especially non-isothermal conditions evolving upon insertion of an isothermal sample in the high magnetic field) were encountered in the isothermal phase transformation reversal experiments (Task 4) that later were determined to be due to various condensed matter physics phenomenon such as the magnetocaloric (MCE) effect that occurs in the vicinity of a materials Curie temperature. Similarly the experimental deformation rig had components for monitoring deformation/strain (Task 3) that were susceptible to the high magnetic field of the ORNL Thermomagnetic Processing facility 9-T superconducting magnet that caused electronic components to fail or record erroneous (very noisy) signals. Limited experiments on developing nanocrystalline spacing pearlite were not sufficient to elucidate the impact of high magnetic field processing on the final pearlite spacing since significant statistical evaluation of many pearlite colonies would need to be done to be conclusive. Since extensive effort was devoted to resolving issues for Tasks 3 and 7, only results for these focused activities are included in this final CRADA report along with those for Task 7 (described in the Objectives Section

  12. Fabrication and characterization of MCC (Materials Characterization Center) approved testing material: ATM-10 glass

    SciTech Connect

    Maupin, G.D.; Bowen, W.M.; Daniel, J.L.

    1988-04-01

    The Materials Characterization Center ATM-10 glass represents a reference commercial high-level waste form similar to that which will be produced by the West Valley Nuclear Service Co. Inc., West Valley, New York. The target composition and acceptable range of composition were defined by the sponsor, West Valley Nuclear Service. The ATM-10 glass was produced in accordance with the Pacific Northwest Laboratory QA Manual for License-Related Programs, MCC technical procedures, and MCC QA Plan that were in effect during the course of the work. The method and procedure to be used in the fabrication and characterization of the ATM-10 glass were specified in two run plans for glass preparation and a characterization plan. All of the ATM-10 glass was produced in the form of bars 1.9 /times/ 1.9 /times/ 10 cm nominal size, and 93 g nominal mass. A total of 15 bars of ATM-10 glass weighing 1394 g was produced. The production bars were characterized to determine the mean composition, oxidation state, and microstructure of the ATM-10 product. Table A summarizes the characterization results. The ATM-10 glass meets all specifications. The elemental composition and oxidation state of the glass are within the specifications of the client. Visually, the ATM-10 glass bars appear uniformly glassy and generally without exterior features. Microscopic examination revealed low (less than 2 wt %) concentractions of 3-..mu..m iron-chrome (suspected spinel) crystals and /approximately/0.5-..mu..m ruthenium inclusions scattered randomly throughout the glassy matrix. Closed porosity, with pores ranging in diameter from 5 to 250 ..mu..m, was observed in all samples. 4 refs., 10 figs., 21 tabs.

  13. Materials Down Select Decisions Made Within the Department of Energy Hydrogen Sorption Center of Excellence

    SciTech Connect

    Simpson, Lin

    2009-11-30

    Technical report describing DOE's Hydrogen Sorption Center of Excellence investigation into various adsorbent and chemisorption materials and progress towards meeting DOE's hydrogen storage targets. The report presents a review of the material status as related to DOE hydrogen storage targets and explains the basis for the down select decisions.

  14. Materials, Strands, and Cables for Superconducting Accelerator Magnets. Final Report

    SciTech Connect

    Sumption, Mike D.; Collings, Edward W.

    2014-09-19

    This report focuses on Materials, Strands and Cables for High Energy Physics Particle accelerators. In the materials area, work has included studies of basic reactions, diffusion, transformations, and phase assemblage of Nb3Sn. These materials science aspects have been married to results, in the form of flux pinning, Bc2, Birr, and transport Jc, with an emphasis on obtaining the needed Jc for HEP needs. Attention has also been paid to the “intermediate-temperature superconductor”, magnesium diboride emphasis being placed on (i) irreversibility field enhancement, (ii) critical current density and flux pinning, and (iii) connectivity. We also report on studies of Bi-2212. The second area of the program has been in the area of “Strands” in which, aside from the materials aspect of the conductor, its physical properties and their influence on performance have been studied. Much of this work has been in the area of magnetization estimation and flux jump calculation and control. One of the areas of this work was strand instabilities in high-performance Nb3Sn conductors due to combined fields and currents. Additionally, we investigated quench and thermal propagation in YBCO coated conductors at low temperatures and high fields. The last section, “Cables”, focussed on interstrand contact resistance, ICR, it origins, control, and implications. Following on from earlier work in NbTi, the present work in Nb3Sn has aimed to make ICR intermediate between the two extremes of too little contact (no current sharing) and too much (large and unacceptable magnetization and associated beam de-focussing). Interstrand contact and current sharing measurements are being made on YBCO based Roebel cables using transport current methods. Finally, quench was investigated for YBCO cables and the magnets wound from them, presently with a focus on 50 T solenoids for muon collider applications.

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

    DOEpatents

    Viswanathan, Tito

    2015-10-27

    A method of separating a liquid hydrocarbon material from a body of water, includes: (a) mixing magnetic carbon-metal nanocomposites with a liquid hydrocarbon material dispersed in a body of water to allow the magnetic carbon-metal nanocomposites each to be adhered by the liquid hydrocarbon material to form a mixture; (b) applying a magnetic force to the mixture to attract the magnetic carbon-metal nanocomposites each adhered by the liquid hydrocarbon material; and (c) removing the body of water from the magnetic carbon-metal nanocomposites each adhered by the liquid hydrocarbon material while maintaining the applied magnetic force. The 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, for a period of time effective to allow the carbon-metal nanocomposites to be formed.

  16. Method and apparatus for separating materials magnetically. [Patent application; iron pyrite from coal

    DOEpatents

    Hise, E.C. Jr.; Holman, A.S.; Friedlaender, F.J.

    1980-11-06

    Magnetic and nonmagnetic materials are separated by passing stream thereof past coaxial current-carrying coils which produce a magnetic field wherein intensity varies sharply with distance radially of the axis of the coils.

  17. Novel Magnetic States in the Heavy-Fermion Quantum-Critical Material...

    Office of Scientific and Technical Information (OSTI)

    by NMR Citation Details In-Document Search Title: Novel Magnetic States in the Heavy-Fermion Quantum-Critical Material CeRhIn5 at High Magnetic Fields Studied by NMR Authors: ...

  18. Novel Magnetic States in the Heavy-Fermion Quantum-Critical Material...

    Office of Scientific and Technical Information (OSTI)

    by NMR Citation Details In-Document Search Title: Novel Magnetic States in the Heavy-Fermion Quantum-Critical Material CeRhIn5 at High Magnetic Fields Studied by NMR You ...

  19. Materials Dow Select Decisions Made Within DOEs Chemical Hydrogen Storage Center of Excellence

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Down Select Report of Chemical Hydrogen Storage Materials, Catalysts, and Spent Fuel Regeneration Processes Chemical Hydrogen Storage Center of Excellence FY2008 Second Quarter Milestone Report Submitted by: The Chemical Hydrogen Storage Center of Excellence Coordinating Council Authors: Kevin C. Ott, Los Alamos National Laboratory Sue Linehan, Rohm and Haas Company Frank Lipiecki, Rohm and Haas Company Christopher L. Aardahl, Pacific Northwest National Laboratory May 2008 Acknowledgements The

  20. Contract administration involving the remedial investigation and feasibility study at the Feed Materials Production Center

    SciTech Connect

    Not Available

    1991-08-28

    Advanced Sciences, Incorporated (ASI), has been performing a Remedial Investigation and Feasibility Study (RI/FS) at the Feed Materials Production Center (Fernald Facility) at Fernald, Ohio, under an 8 (a) contract with the US Small Business Administration (SBA). The Fernald Facility is a Government-owned facility operated by Westinghouse Materials Company of Ohio (WMCO) under a management and operating contract. The objective of this audit was to evaluate the award and administration of the ASI contract.

  1. Magnetic mesoporous material for the sequestration of algae

    DOEpatents

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

    2014-09-09

    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.

  2. Upgrading the Center for Lightweighting Automotive Materials and Processing - a GATE Center of Excellence at the University of Michigan-Dearborn

    SciTech Connect

    Mallick, P. K.

    2012-08-30

    The Center for Lightweighting Materials and Processing (CLAMP) was established in September 1998 with a grant from the Department of Energy’s Graduate Automotive Technology Education (GATE) program. The center received the second round of GATE grant in 2005 under the title “Upgrading the Center for Lightweighting Automotive Materials and Processing”. Using the two grants, the Center has successfully created 10 graduate level courses on lightweight automotive materials, integrated them into master’s and PhD programs in Automotive Systems Engineering, and offered them regularly to the graduate students in the program. In addition, the Center has created a web-based lightweight automotive materials database, conducted research on lightweight automotive materials and organized seminars/symposia on lightweight automotive materials for both academia and industry. The faculty involved with the Center has conducted research on a variety of topics related to design, testing, characterization and processing of lightweight materials for automotive applications and have received numerous research grants from automotive companies and government agencies to support their research. The materials considered included advanced steels, light alloys (aluminum, magnesium and titanium) and fiber reinforced polymer composites. In some of these research projects, CLAMP faculty have collaborated with industry partners and students have used the research facilities at industry locations. The specific objectives of the project during the current funding period (2005 – 2012) were as follows: (1) develop new graduate courses and incorporate them in the automotive systems engineering curriculum (2) improve and update two existing courses on automotive materials and processing (3) upgrade the laboratory facilities used by graduate students to conduct research (4) expand the Lightweight Automotive Materials Database to include additional materials, design case studies and make it more

  3. Center for Coal-Derived Low Energy Materials for Sustainable Construction

    SciTech Connect

    Jewell, Robert; Robl, Tom; Rathbone, Robert

    2012-06-30

    The overarching goal of this project was to create a sustained center to support the continued development of new products and industries that manufacture construction materials from coal combustion by-products or CCB’s (e.g., cements, grouts, wallboard, masonry block, fillers, roofing materials, etc). Specific objectives includes the development of a research kiln and associated system and the formulation and production of high performance low-energy, low-CO2 emitting calcium sulfoaluminate (CAS) cement that utilize coal combustion byproducts as raw materials.

  4. Biasing and fast degaussing circuit for magnetic materials

    DOEpatents

    Dress, W.B. Jr.; McNeilly, D.R.

    1983-10-04

    A dual-function circuit is provided which may be used to both magnetically bias and alternately, quickly degauss a magnetic device. The circuit may be magnetically coupled or directly connected electrically to a magnetic device, such as a magnetostrictive transducer, to magnetically bias the device by applying a dc current and alternately apply a selectively damped ac current to the device to degauss the device. The circuit is of particular value in many systems which use magnetostrictive transducers for ultrasonic transmission in different propagation modes over very short time periods.

  5. Biasing and fast degaussing circuit for magnetic materials

    DOEpatents

    Dress, Jr., William B.; McNeilly, David R.

    1984-01-01

    A dual-function circuit is provided which may be used to both magnetically bias and alternately, quickly degauss a magnetic device. The circuit may be magnetically coupled or directly connected electrically to a magnetic device, such as a magnetostrictive transducer, to magnetically bias the device by applying a d.c. current and alternately apply a selectively damped a.c. current to the device to degauss the device. The circuit is of particular value in many systems which use magnetostrictive transducers for ultrasonic transmission in different propagation modes over very short time periods.

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

    SciTech Connect

    2012-01-01

    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.

  7. High frequency transformers and high Q factor inductors formed using epoxy-based magnetic polymer materials

    DOEpatents

    Sanchez, Robert O.; Gunewardena, Shelton; Masi, James V.

    2007-11-27

    An electrical component in the form of an inductor or transformer is disclosed which includes one or more coils and a magnetic polymer material located near the coils or supporting the coils to provide an electromagnetic interaction therewith. The magnetic polymer material is preferably a cured magnetic epoxy which includes a mercaptan derivative having a ferromagnetic atom chemically bonded therein. The ferromagnetic atom can be either a transition metal or rare-earth atom.

  8. High frequency transformers and high Q factor inductors formed using epoxy-based magnetic polymer materials

    DOEpatents

    Sanchez, Robert O.; Gunewardena, Shelton; Masi, James V.

    2005-03-29

    An electrical component in the form of an inductor or transformer is disclosed which includes one or more coils and a magnetic polymer material located near the coils or supporting the coils to provide an electromagnetic interaction therewith. The magnetic polymer material is preferably a cured magnetic epoxy which includes a mercaptan derivative having a ferromagnetic atom chemically bonded therein. The ferromagnetic atom can be either a transition metal or rare-earth atom.

  9. Conceptual design report, Hazardous Materials Management and Emergency Response (HAMMER) Training Center

    SciTech Connect

    Kelly, K.E.

    1994-11-09

    For the next 30 years, the main activities at the US Department of Energy (DOE) Hanford Site will involve the management, handling, and cleanup of toxic substances. If the DOE is to meet its high standards of safety, the thousands of workers involved in these activities will need systematic training appropriate to their tasks and the risks associated with these tasks. Furthermore, emergency response for DOE shipments is the primary responsibility of state, tribal, and local governments. A collaborative training initiative with the DOE will strengthen emergency response at the Hanford Site and within the regional communities. Local and international labor has joined the Hazardous Materials Management and Emergency Response (HAMMER) partnership, and will share in the HAMMER Training Center core programs and facilities using their own specialized trainers and training programs. The HAMMER Training Center will provide a centralized regional site dedicated to the training of hazardous material, emergency response, and fire fighting personnel.

  10. Project plan, Hazardous Materials Management and Emergency Response Training Center: Project 95L-EWT-100

    SciTech Connect

    Borgeson, M.E.

    1994-11-09

    The Hazardous Materials Management and Emergency Response (HAMMER) Training Center will provide for classroom lectures and hands-on practical training in realistic situations for workers and emergency responders who are tasked with handling and cleanup of toxic substances. The primary objective of the HAMMER project is to provide hands-on training and classroom facilities for hazardous material workers and emergency responders. This project will also contribute towards complying with the planning and training provisions of recent legislation. In March 1989 Title 29 Code of Federal Regulations Occupational Safety and Health Administration 1910 Rules and National Fire Protection Association Standard 472 defined professional requirements for responders to hazardous materials incidents. Two general types of training are addressed for hazardous materials: training for hazardous waste site workers and managers, and training for emergency response organizations.

  11. Electronic & magnetic materials and devices at the CNM | Argonne...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    ... Image: Photo courtesy of Argonne National Laboratory Nanostructured organic photovoltaic cells 11 of 24 Nanostructured organic photovoltaic cells Argonne's Center for Nanoscale ...

  12. Center for Fundamental and Applied Research in Nanostructured and Lightweight Materials. Final Technical Summary

    SciTech Connect

    Mullins, Michael; Rogers, Tony; King, Julia; Keith, Jason; Cornilsen, Bahne; Allen, Jeffrey; Gilbert, Ryan; Holles, Joseph

    2010-09-28

    The core projects for this DOE-sponsored Center at Michigan Tech have focused on several of the materials problems identified by the NAS. These include: new electrode materials, enhanced PEM materials, lighter and more effective bipolar plates, and improvement of the carbon used as a current carrier. This project involved fundamental and applied research in the development and testing of lightweight and nanostructured materials to be used in fuel cell applications and for chemical synthesis. The advent of new classes of materials engineered at the nanometer level can produce materials that are lightweight and have unique physical and chemical properties. The grant was used to obtain and improve the equipment infrastructure to support this research and also served to fund seven research projects. These included: 1. Development of lightweight, thermally conductive bipolar plates for improved thermal management in fuel cells; 2. Exploration of pseudomorphic nanoscale overlayer bimetallic catalysts for fuel cells; 3. Development of hybrid inorganic/organic polymer nanocomposites with improved ionic and electronic properties; 4. Development of oriented polymeric materials for membrane applications; 5. Preparation of a graphitic carbon foam current collectors; 6. The development of lightweight carbon electrodes using graphitic carbon foams for battery and fuel cell applications; and 7. Movement of water in fuel cell electrodes.

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

    SciTech Connect

    Johnson, Francis

    2014-06-30

    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

  14. Perspectives on Permanent Magnetic Materials for Energy Conversion and Power Generation

    SciTech Connect

    Lewis, LH; Jimenez-Villacorta, F

    2012-07-18

    Permanent magnet development has historically been driven by the need to supply larger magnetic energy in ever smaller volumes for incorporation in an enormous variety of applications that include consumer products, transportation components, military hardware, and clean energy technologies such as wind turbine generators and hybrid vehicle regenerative motors. Since the 1960s, the so-called rare-earth "supermagnets," composed of iron, cobalt, and rare-earth elements such as Nd, Pr, and Sm, have accounted for the majority of global sales of high-energy-product permanent magnets for advanced applications. In rare-earth magnets, the transition-metal components provide high magnetization, and the rare-earth components contribute a very large magnetocrystalline anisotropy that donates high resistance to demagnetization. However, at the end of 2009, geopolitical influences created a worldwide strategic shortage of rare-earth elements that may be addressed, among other actions, through the development of rare-earth-free magnetic materials harnessing sources of magnetic anisotropy other than that provided by the rare-earth components. Materials engineering at the micron scale, nanoscale, and Angstrom scales, accompanied by improvements in the understanding and characterization of nanoscale magnetic phenomena, is anticipated to result in new types of permanent magnetic materials with superior performance. DOI: 10.1007/s11661-012-1278-2 (C) The Minerals, Metals & Materials Society and ASM International 2012

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

    DOEpatents

    Viswanathan, Tito

    2014-02-11

    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.

  16. GATE Center of Excellence at UAB in Lightweight Materials for Automotive Applications

    SciTech Connect

    2011-07-31

    This report summarizes the accomplishments of the UAB GATE Center of Excellence in Lightweight Materials for Automotive Applications. The first Phase of the UAB DOE GATE center spanned the period 2005-2011. The UAB GATE goals coordinated with the overall goals of DOE's FreedomCAR and Vehicles Technologies initiative and DOE GATE program. The FCVT goals are: (1) Development and validation of advanced materials and manufacturing technologies to significantly reduce automotive vehicle body and chassis weight without compromising other attributes such as safety, performance, recyclability, and cost; (2) To provide a new generation of engineers and scientists with knowledge and skills in advanced automotive technologies. The UAB GATE focused on both the FCVT and GATE goals in the following manner: (1) Train and produce graduates in lightweight automotive materials technologies; (2) Structure the engineering curricula to produce specialists in the automotive area; (3) Leverage automotive related industry in the State of Alabama; (4) Expose minority students to advanced technologies early in their career; (5) Develop innovative virtual classroom capabilities tied to real manufacturing operations; and (6) Integrate synergistic, multi-departmental activities to produce new product and manufacturing technologies for more damage tolerant, cost-effective, and lighter automotive structures.

  17. Project T100 -- Hazardous Materials Management and Emergency Response Training Center (HAMMER)

    SciTech Connect

    Norton, C.E.

    1994-11-09

    The scope of this Quality Assurance Program Plan (QAPP) is to provide a system of Quality Assurance reviews and verifications on the design and construction of the Hazardous Materials Management and Emergency Response (HAMMER) Training Center, project 95L-EWT-100 at Hanford. The reviews and verifications will be on activities associated with design, procurement, and construction of the HAMMER project which includes, but is not limited to earthwork, placement of concrete, laying of rail, drilling of wells, water and sewer line fabrication and installation, communications systems, fire protection/detection systems, line tie-ins, building and mock-up (prop) construction, electrical, instrumentation, pump and valves and special coatings.

  18. International Nuclear Safety Center database on thermophysical properties of reactor materials

    SciTech Connect

    Fink, J.K.; Sofu, T.; Ley, H.

    1997-08-01

    The International Nuclear Safety Center (INSC) database has been established at Argonne National Laboratory to provide easily accessible data and information necessary to perform nuclear safety analyses and to promote international collaboration through the exchange of nuclear safety information. The INSC database, located on the World Wide Web at http://www.insc.anl.gov, contains critically assessed recommendations for reactor material properties for normal operating conditions, transients, and severe accidents. The initial focus of the database is on thermodynamic and transport properties of materials for water reactors. Materials that are being included in the database are fuel, absorbers, cladding, structural materials, coolant, and liquid mixtures of combinations of UO{sub 2}, ZrO{sub 2}, Zr, stainless steel, absorber materials, and concrete. For each property, the database includes: (1) a summary of recommended equations with uncertainties; (2) a detailed data assessment giving the basis for the recommendations, comparisons with experimental data and previous recommendations, and uncertainties; (3) graphs showing recommendations, uncertainties, and comparisons with data and other equations; and (4) property values tabulated as a function of temperature.

  19. Materials Down-selection Decisions Made within the DOE Metal Hydride Center of Excellence (MHCoE) - September-October 2007

    Publication and Product Library

    Reports on which hydrogen storage materials offer potential for further research as decided by DOE's Metal Hydride Center of Excellence.

  20. Materials Down-selection Decisions Made within the DOE Metal Hydride Center of Excellence (MHCoE) - September-October 2007

    SciTech Connect

    Klebanoff, Lennie

    2007-09-01

    Reports on which hydrogen storage materials offer potential for further research as decided by DOE's Metal Hydride Center of Excellence.

  1. Dynamic high pressure process for fabricating superconducting and permanent magnetic materials

    DOEpatents

    Nellis, William J.; Geballe, Theodore H.; Maple, M. Brian

    1990-01-01

    Shock wave formation of thin layers of materials with improved superconducting and permanent magnetic properties and improved microstructures. 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.degree.-100.degree. 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.

  2. Dynamic high pressure process for fabricating superconducting and permanent magnetic materials

    DOEpatents

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

    1990-03-13

    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.

  3. Environment, safety and health compliance assessment, Feed Materials Production Center, Fernald, Ohio

    SciTech Connect

    Not Available

    1989-09-01

    The Secretary of Energy established independent Tiger Teams to conduct environment, safety, and health (ES H) compliance assessments at US Department of Energy (DOE) facilities. This report presents the assessment of the Feed Materials Production Center (FMPC) at Fernald, Ohio. The purpose of the assessment at FMPC is to provide the Secretary with information regarding current ES H compliance status, specific ES H noncompliance items, evaluation of the adequacy of the ES H organizations and resources (DOE and contractor), and root causes for noncompliance items. Areas reviewed included performance under Federal, state, and local agreements and permits; compliance with Federal, state and DOE orders and requirements; adequacy of operations and other site activities, such as training, procedures, document control, quality assurance, and emergency preparedness; and management and staff, including resources, planning, and interactions with outside agencies.

  4. Ion energy-angle distribution functions at the plasma-material interface in oblique magnetic fields

    SciTech Connect

    Khaziev, Rinat; Curreli, Davide

    2015-04-15

    The ion energy-angle distribution (IEAD) at the wall of a magnetized plasma is of fundamental importance for the determination of the material processes occurring at the plasma-material interface, comprising secondary emissions and material sputtering. Here, we present a numerical characterization of the IEAD at the wall of a weakly collisional magnetized plasma with the magnetic field inclined at an arbitrary angle with respect to the wall. The analysis has been done using two different techniques: (1) a fluid-Monte Carlo method, and (2) particle-in-cell simulations, the former offering a fast but approximate method for the determination of the IEADs, the latter giving a computationally intensive but self-consistent treatment of the plasma behavior from the quasi-neutral region to the material boundary. The two models predict similar IEADs, whose similarities and differences are discussed. Data are presented for magnetic fields inclined at angles from normal to grazing incidence (0°–85°). We show the scaling factors of the average and peak ion energy and trends of the pitch angle at the wall as a function of the magnetic angle, for use in the correlation of fluid plasma models to material models.

  5. Use of High Magnetic Fields to Improve Material Properties for Hydraulics, Automotive and Truck Components

    SciTech Connect

    Ludtka, Gerard Michael; Ludtka, Gail Mackiewicz-; Wilgen, John B; Kisner, Roger A; Ahmad, Aquil

    2010-08-01

    In this CRADA, research and development activities were successfully conducted on magnetic processing effects for the purpose of manipulating microstructure and the application specific performance of three alloys provided by Eaton (alloys provided were: carburized steel, plain low carbon steel and medium carbon spring steel). Three specific industrial/commercial application areas were considered where HMFP can be used to provide significant energy savings and improve materials performance include using HMFP to: 1.) Produce higher material strengths enabling higher torque bearing capability for drive shafts and other motor components; 2.) Increase the magnetic response in an iron-based material, thereby improving its magnetic permeability resulting in improved magnetic coupling and power density, and 3.) Improve wear resistance. The very promising results achieved in this endeavor include: 1.) a significant increase in tensile strength and a major reduction in volume percent retained austenite for the carburized alloy, and 2.) a substantial improvement in magnetic perm respect to a no-field processed sample (which also represents a significant improvement over the nominal conventional automotive condition of no heat treatment). The successful completion of these activities has resulted in the current 3-year CRADA No. NFE-09-02522 Prototyping Energy Efficient ThermoMagnetic and Induction Hardening for Heat Treat and Net Shape Forming Applications .

  6. The proposed fixation of sludge in cement at the Feed Materials Production Center

    SciTech Connect

    Gimpel, R.F.

    1990-12-01

    The Feed Materials Production Center (FMPC), located near Cincinnati, Ohio, is a government-owned facility. Westinghouse Materials Company of Ohio (WMCO) is the prime contractor to the United States Department of Energy (DOE) at the FMPC. DOE has entered into a Consent Agreement with the United States Environmental Protection Agency (US EPA) to remediate the FMPC site. A project known as the Environmental Remedial Action (ERA) Project was created to accomplish the task of remediating the site. The majority of the estimated $2-billion ERA Project was broken into five smaller manageable subtasks called operable units.'' Each operable unit is handled as a project with its own project manager/engineer. Due to the project's complexity and stringent completion dates, DOE and WMCO have devised a project management philosophy to ensure the successful completion of the ERA Project. This paper will discuss the ERA project and the development needs to accomplish this project. In particular, development of processes for the treatment of waste sludges for Operable Units 1 and 4 will be discussed. Operable Units 2 sludges will be treated in a similar fashion to Operable Unit 1 if it is determined these sludges need treatment. 4 refs., 5 figs., 9 tabs.

  7. THERMAL IMAGING OF ACTIVE MAGNETIC REGERNERATOR MCE MATERIALS DURING OPERATION

    SciTech Connect

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

    2012-01-01

    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.

  8. Thermal effects on transducer material for heat assisted magnetic recording application

    SciTech Connect

    Ji, Rong Xu, Baoxi; Cen, Zhanhong; Ying, Ji Feng; Toh, Yeow Teck

    2015-05-07

    Heat Assisted Magnetic Recording (HAMR) is a promising technology for next generation hard disk drives with significantly increased data recording capacities. In HAMR, an optical near-field transducer (NFT) is used to concentrate laser energy on a magnetic recording medium to fulfill the heat assist function. The key components of a NFT are transducer material, cladding material, and adhesion material between the cladding and the transducer materials. Since transducer materials and cladding materials have been widely reported, this paper focuses on the adhesion materials between the Au transducer and the Al{sub 2}O{sub 3} cladding material. A comparative study for two kinds of adhesion material, Ta and Cr, has been conducted. We found that Ta provides better thermal stability to the whole transducer than Cr. This is because after thermal annealing, chromium forms oxide material at interfaces and chromium atoms diffuse remarkably into the Au layer and react with Au to form Au alloy. This study also provides insights on the selection of adhesion material for HAMR transducer.

  9. (110) Orientation growth of magnetic metal nanowires with face-centered cubic structure using template synthesis technique

    SciTech Connect

    Wang Xuewei; Yuan Zhihao; Li Jushan

    2011-06-15

    A template-assisted assembly technique has been used to synthesize magnetic metal nanowire arrays. Fe, Co, Ni nanowires are fabricated using direct-current electrodeposition in the pores of anodic alumina membranes. The morphology and the crystal structure of the samples are characterized by field-emission scanning electron microscopy, transmission electron microscopy, and X-ray diffractometer. The results indicate that Fe, Co, and Ni nanowires all have face-centered cubic (FCC) structure and a preferred orientation along the [110] direction. The ability to prepare well-defined orientation growth of magnetic metal nanowires with FCC structure opens up new opportunities for both fundamental studies and nanodevice applications. - Research Highlights: {yields} Fe, Co, and Ni nanowires are fabricated in the AAM templates by electrodeposition. {yields} Well-defined orientation growth of the nanowires with FCC structure were investigated. {yields} The electrodeposition parameters affect the crystal structure and growth orientation.

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

    DOEpatents

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

    2013-03-05

    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.

  11. Center for Electrocatalysis, Transport Phenomena, and Materials (CETM) for Innovative Energy Storage - Final Report

    SciTech Connect

    Soloveichik, Grigorii

    2015-11-30

    EFRC vision. The direct use of organic hydrides in fuel cells as virtual hydrogen carriers that generate stable organic molecules, protons, and electrons upon electro-oxidation and can be electrochemically charged by re-hydrogenating the oxidized carrier was the major focus of the Center for Electrocatalysis, Transport Phenomena and Materials for Innovative Energy Storage (EFRC-ETM). Compared to a hydrogen-on-demand design that includes thermal decomposition of organic hydrides in a catalytic reactor, the proposed approach is much simpler and does not require additional dehydrogenation catalysts or heat exchangers. Further, this approach utilizes the advantages of a flow battery (i.e., separation of power and energy, ease of transport and storage of liquid fuels) with fuels that have system energy densities similar to current hydrogen PEM fuel cells. EFRC challenges. Two major EFRC challenges were electrocatalysis and transport phenomena. The electrocatalysis challenge addresses fundamental processes which occur at a single molecular catalyst (microscopic level) and involve electron and proton transfer between the hydrogen rich and hydrogen depleted forms of organic liquid fuel and the catalyst. To form stable, non-radical dehydrogenation products from the organic liquid fuel, it is necessary to ensure fast transport of at least two electrons and two protons (per double bond formation). The same is true for the reverse hydrogenation reaction. The transport phenomena challenge addresses transport of electrons to/from the electrocatalyst and the current collector as well as protons across the polymer membrane. Additionally it addresses prevention of organic liquid fuel, water and oxygen transport through the PEM. In this challenge, the transport of protons or molecules involves multiple sites or a continuum (macroscopic level) and water serves as a proton conducting medium for the majority of known sulfonic acid based PEMs. Proton transfer in the presence of

  12. Thermal plasma processed ferro-magnetically ordered face-centered cubic iron at room temperature

    SciTech Connect

    Raut, Suyog A.; Kanhe, Nilesh S.; Bhoraskar, S. V.; Mathe, V. L.; Das, A. K.

    2014-10-28

    Here, we report tailor made phase of iron nanoparticles using homogeneous gas phase condensation process via thermal plasma route. It was observed that crystal lattice of nano-crystalline iron changes as a function of operating parameters of the plasma reactor. In the present investigation iron nanoparticles have been synthesized in presence of argon at operating pressures of 1251000?Torr and fixed plasma input DC power of 6?kW. It was possible to obtain pure fcc, pure bcc as well as the mixed phases for iron nanoparticles in powder form as a function of operating pressure. The as synthesized product was characterized for understanding the structural and magnetic properties by using X-ray diffraction, vibrating sample magnetometer, and Mssbauer spectroscopy. The data reveal that fcc phase is ferromagnetically ordered with high spin state, which is unusual whereas bcc phase is found to be ferromagnetic as usual. Finally, the structural and magnetic properties are co-related.

  13. Stimuli-responsive hybrid materials: breathing in magnetic layered double hydroxides induced by a thermoresponsive molecule

    SciTech Connect

    Abellán, Gonzalo; Jordá, Jose Luis; Atienzar, Pedro; Varela, María; Jaafar, Miriam; Gómez-Herrero, Julio; Zamora, Félix; Ribera, Antonio; García, Hermenegildo; Coronado, Eugenio

    2014-12-04

    In this study, a hybrid magnetic multilayer material of micrometric size, with highly crystalline hexagonal crystals consisting of CoAl–LDH ferromagnetic layers intercalated with thermoresponsive 4-(4 anilinophenylazo)benzenesulfonate (AO5) molecules diluted (ratio 9 : 1) with a flexible sodium dodecylsulphate (SDS) surfactant has been obtained. The resulting material exhibits thermochromism attributable to the isomerization between the azo (prevalent at room temperature) and the hydrazone (favoured at higher temperatures) tautomers, leading to a thermomechanical response. In fact, these crystals exhibited thermally induced motion triggering remarkable changes in the crystal morphology and volume. In situ variable temperature XRD of these thin hybrids shows that the reversible change into the two tautomers is reflected in a shift of the position of the diffraction peaks at high temperatures towards lower interlayer spacing for the hydrazone form, as well as a broadening of the peaks reflecting lower crystallinity and ordering due to non-uniform spacing between the layers. These structural variations between room temperature (basal spacing (BS) = 25.91 Å) and 100 °C (BS = 25.05 Å) are also reflected in the magnetic properties of the layered double hydroxide (LDH) due to the variation of the magnetic coupling between the layers. Finally and in conclusion, our study constitutes one of the few examples showing fully reversible thermo-responsive breathing in a 2D hybrid material. In addition, the magnetic response of the hybrid can be modulated due to the thermotropism of the organic component that, by influencing the distance and in-plane correlation of the inorganic LDH, modulates the magnetism of the CoAl–LDH sheets in a certain range.

  14. Stimuli-responsive hybrid materials: breathing in magnetic layered double hydroxides induced by a thermoresponsive molecule

    DOE PAGES [OSTI]

    Abellán, Gonzalo; Jordá, Jose Luis; Atienzar, Pedro; Varela, María; Jaafar, Miriam; Gómez-Herrero, Julio; Zamora, Félix; Ribera, Antonio; García, Hermenegildo; Coronado, Eugenio

    2014-12-04

    In this study, a hybrid magnetic multilayer material of micrometric size, with highly crystalline hexagonal crystals consisting of CoAl–LDH ferromagnetic layers intercalated with thermoresponsive 4-(4 anilinophenylazo)benzenesulfonate (AO5) molecules diluted (ratio 9 : 1) with a flexible sodium dodecylsulphate (SDS) surfactant has been obtained. The resulting material exhibits thermochromism attributable to the isomerization between the azo (prevalent at room temperature) and the hydrazone (favoured at higher temperatures) tautomers, leading to a thermomechanical response. In fact, these crystals exhibited thermally induced motion triggering remarkable changes in the crystal morphology and volume. In situ variable temperature XRD of these thin hybrids shows thatmore » the reversible change into the two tautomers is reflected in a shift of the position of the diffraction peaks at high temperatures towards lower interlayer spacing for the hydrazone form, as well as a broadening of the peaks reflecting lower crystallinity and ordering due to non-uniform spacing between the layers. These structural variations between room temperature (basal spacing (BS) = 25.91 Å) and 100 °C (BS = 25.05 Å) are also reflected in the magnetic properties of the layered double hydroxide (LDH) due to the variation of the magnetic coupling between the layers. Finally and in conclusion, our study constitutes one of the few examples showing fully reversible thermo-responsive breathing in a 2D hybrid material. In addition, the magnetic response of the hybrid can be modulated due to the thermotropism of the organic component that, by influencing the distance and in-plane correlation of the inorganic LDH, modulates the magnetism of the CoAl–LDH sheets in a certain range.« less

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

    DOEpatents

    Jiles, David C.; Sipahi, Levent B.

    1994-05-17

    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.

  16. Young Investigator Program > Research > The Energy Materials Center at

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Cornell Young Investigator Program In This Section YIA1 - Chen YIA2 - Rodríguez-Calero YIA3 - Rodriguez-López YIA4 - Hernández-Burgos YIA5 - Khurana YIA6 - Potash Young Investigator Program This program is designed to encourage Center postdocs and students to submit collaborative proposals for new research projects that advance the Center's overall programmatic goal of advancing the science of energy conversion and storage by understanding and exploiting fundamental properties of active

  17. Explosives Center

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Explosives Center Explosives Center at Los Alamos National Laboratory A world leader in energetic materials research, development and applications, the Explosives Center's unique capabilities enable a dynamic, flexible response to address multiple evolving mission needs. explosives experiment Comprehensive energetic materials development, characterization and testing are key strengths at Los Alamos National Laboratory. An experimental explosive is shown igniting during small-scale impact

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

    DOEpatents

    Pecharsky, Alexandra O.; Gschneidner, Jr., Karl A.; Pecharsky, Vitalij K.

    2006-10-03

    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.

  19. Cryogenic Considerations for Superconducting Magnet Design for the Material Plasma Exposure eXperiment

    SciTech Connect

    Duckworth, Robert C; Demko, Dr. Jonathan A; Lumsdaine, Arnold; Caughman, John B; Goulding, Richard Howell; McGinnis, William Dean; Bjorholm, Thomas P; Rapp, Juergen

    2015-01-01

    In order to determine long term performance of plasma facing components such as diverters and first walls for fusion devices, next generation plasma generators are needed. A Material Plasma Exposure eXperiment (MPEX) has been proposed to address this need through the generation of plasmas in front of the target with electron temperatures of 1-15 eV and electron densities of 1020 to 1021 m-3. Heat fluxes on target diverters could reach 20 MW/m2. In order generate this plasma, a unique radio frequency helicon source and heating of electrons and ions through Electron Bernstein Wave (EBW) and Ion Cyclotron Resonance Heating (ICRH) has been proposed. MPEX requires a series of magnets with non-uniform central fields up to 2 T over a 5m length in the heating and transport region and 1 T uniform central field over a 1-m length on a diameter of 1.3 m. Given the field requirements, superconducting magnets are under consideration for MPEX. In order to determine the best construction method for the magnets, the cryogenic refrigeration has been analyzed with respect to cooldown and operational performance criteria for open-cycle and closed-cycle systems, capital and operating costs of these system, and maturity of supporting technology such as cryocoolers. These systems will be compared within the context of commercially available magnet constructions to determine the most economical method for MPEX operation. The current state of the MPEX magnet design including details on possible superconducting magnet configurations will be presented.

  20. Tokamak Physics EXperiment (TPX): Toroidal field magnet design, development and manufacture. SDRL 21, Materials and processes selection. Volume 2

    SciTech Connect

    Smith, B.R.

    1995-08-15

    This document identifies the candidate materials and manufacturing processes selected for development of the TPX Toroidal Field (TF) Magnet. Supporting rationale and selection criteria are provided for justification and the materials properties database report is included for completeness. Specific properties for each material selection are included in this document.

  1. Center for Materials at Irradiation and Mechanical Extremes: Los Alamos Lab

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Adrian Sutton Adrian is Head of Condensed Matter Theory in the Department of Physics at Imperial College London, which is a group of 11 distinguished condensed matter and materials physicists. He is also Director of the Doctoral Training Centre on Theory and Simulation of Materials at Imperial, where he leads 50 academics in the Departments of Physics, Chemistry, Materials, Mechanical Engineering, Aeronautics and Chemical Engineering in the provision of advanced training and research in theory

  2. Center for Inverse Design: Modality 2 - Design of Materials with Targeted

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Functionality 2: Design of Materials with Targeted Functionality Modality 2 applies to cases where we have numerous-perhaps thousands-of materials, each with a single (usually ground-state) configuration, and the desired target property is complex, so it currently cannot be computed on the fly. In this case, we use "design principles"-derived quantities that can be calculated for each material and which suggest key materials parameters that need to be obtained to get the relevant

  3. Calendar of Research Meetings > News + Events > The Energy Materials Center

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    at Cornell News + Events In This Section EMC2 News Upcoming Events Calendar of Research Meetings Archived News RSS & Calender Feeds 2013-2014 Research Meetings To download a pdf listing of upcoming Center Research Meetings and Seminars click here

  4. Nuclear Waste Materials Characterization Center. Semiannual progress report, April 1985-September 1985

    SciTech Connect

    Mendel, J.E.

    1985-12-01

    Work continued on converting MCC Quality Assurance practices to comply with the national QA standard for nuclear facilities, ANSI/ASME NQA-1. Support was provided to the following: Office of Geologic Repositories; Salt Repository Project; Basalt Waste Isolation Project; Office of Defense Waste and Byproducts Management; Hanford Programs; Transportation Technology Center; and West Valley Demonstration Project. (LM)

  5. Henry Kostalik > Researcher - 3M > Center Alumni > The Energy Materials

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Center at Cornell Henry Kostalik Researcher - 3M hak27@cornell.edu Originally a member of the Coates Group, Henry received his PhD from Cornell in 2011. He is now working as a Sr. Research Specialist at 3M Corporate Research Laboratory.

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

    SciTech Connect

    Carwell, H.

    1997-09-19

    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.

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

    SciTech Connect

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

    2014-08-17

    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.

  8. The Ohio State University Bioproducts Innovation Center Sustainable Materials Networking Event

    Energy.gov [DOE]

    The U.S. Department of Energy Bioenergy Technologies Office Deputy Director Dr. Valerie Reed addressed members of The Ohio State University Bioproducts Innovation Center on October 15, 2015, on the main campus of The Ohio State University. Dr. Reed spoke about important upcoming opportunities from the U.S. Department of Energy and the U.S. Department of Agriculture supporting the national bioeconomy.

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

    SciTech Connect

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

    2014-10-01

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

  10. Center for Materials at Irradiation and Mechanical Extremes: Los Alamos Lab

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Michael I. Baskes Dr. Baskes obtained his B.S. degree at Caltech in 1965 in engineering and received his Ph.D. in 1970 at Caltech in Materials Science. He was then employed at Sandia National Laboratories, Livermore for 29 years. At Sandia he was a staff member until 1983. He was then supervisor of the Scientific Computing Division, the Theoretical Division, the Joining and Physical Metallurgy Division, and the Materials and Process Research Division. He was also manager of the Materials and

  11. Biomimicry in metal-organic materials | Center for GasSeparationsRele...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Biomimicry in metal-organic materials Previous Next List Muwei Zhang, Zhi-Yuan Gu, Mathieu Bosch, Zachary Perry, Hong-Cai Zhou, Coordination Chemistry Reviews, (2014) DOI: 10.1016...

  12. Harvesting Solar Energy from Singlet Fission Materials | MIT-Harvard Center

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    for Excitonics Harvesting Solar Energy from Singlet Fission Materials April 19, 2016 at 4:30pm/ 36-428 Sean Roberts Department of Chemistry, The University of Texas at Austin s.roberts.001 A loss mechanism that strongly impacts the performance of photovoltaic cells is the thermalization of charge carriers produced by high energy photons. One strategy to negate these losses is to combine PV cells with materials that capture energetic photons and use their energy to excite multiple

  13. Naval Air Warfare Center, Aircraft Division at Warminster Environmental Materials Program. Phase 1. Interim report, October 1989-May 1992

    SciTech Connect

    Spadafora, S.J.; Hegedus, C.R.; Clark, K.J.; Eng, A.T.; Pulley, D.F.

    1992-06-24

    With the recent increase in awareness about the environment, there is an expanding concern of the deleterious effects of current materials and processes. Federal, state and local environmental agencies such as the EPA, State Air Resource Boards and local Air Quality Management Districts (AQMD) have issued legislation that restrict or prohibit the use and disposal of hazardous materials. National and local laws like the Clean Air and Clean Water Acts, Resource Conservation and Recovery Act, and AQMD regulations are examples of rules that govern the handling and disposal of hazardous materials and waste. The Department of Defense (DoD), in support of this effort, has identified the major generators of hazardous materials and hazardous waste to be maintenance depots and operations, particularly cleaning, pretreating, plating, painting and paint removal processes. Reductions of waste in these areas has been targeted as a primary goal in the DOD. The Navy is committed to significantly reducing its current hazardous waste generation and is working to attain a near zero discharge of hazardous waste by the year 2000. In order to attain these goals, the Naval Air Warfare Center Aircraft Division at Warminster has organized and is carrying out a comprehensive program in cooperation with the Naval Air Systems Command, the Air Force and the Department of Energy that deal with the elimination or reduction of hazardous materials. .... Environmental materials, Organic coatings, Inorganic pretreatments, Paint removal techniques, Cleaners, CFC'S.

  14. Magnetic Materials at finite Temperatures: thermodynamics and combined spin and molecular dynamics derived from first principles calculations

    SciTech Connect

    Eisenbach, Markus; Perera, Meewanage Dilina N; Landau, David P; Nicholson, Don M; Yin, Junqi; Brown, Greg

    2015-01-01

    We present a unified approach to describe the combined behavior of the atomic and magnetic degrees of freedom in magnetic materials. Using Monte Carlo simulations directly combined with first principles the Curie temperature can be obtained ab initio in good agreement with experimental values. The large scale constrained first principles calculations have been used to construct effective potentials for both the atomic and magnetic degrees of freedom that allow the unified study of influence of phonon-magnon coupling on the thermodynamics and dynamics of magnetic systems. The MC calculations predict the specific heat of iron in near perfect agreement with experimental results from 300K to above Tc and allow the identification of the importance of the magnon-phonon interaction at the phase-transition. Further Molecular Dynamics and Spin Dynamics calculations elucidate the dynamics of this coupling and open the potential for quantitative and predictive descriptions of dynamic structure factors in magnetic materials using first principles derived simulations.

  15. Building America Solution Center Shows Builders How to Save Materials Costs While Saving Energy

    SciTech Connect

    Gilbride, Theresa L.

    2015-06-15

    This short article was prepared for the U.S. Department of Energy's Building America Update newsletter. The article identifies energy and cost-saving benefits of using advanced framing techniques in new construction identified by research teams working with the DOE's Building America program. The article also provides links to guides in the Building America Solution Center that give how-to instructions for builders who want to implement advanced framing construction. The newsletter is issued monthly and can be accessed at http://energy.gov/eere/buildings/building-america-update-newsletter

  16. Center for Materials at Irradiation and Mechanical Extremes: Los Alamos Lab

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    William D. Nix Professor Nix obtained his B.S. degree in Metallurgical Engineering from San Jose State College, and his M.S. and Ph.D. degrees in Metallurgical Engineering and Materials Science, respectively, from Stanford University. He joined the faculty at Stanford in 1963 and was appointed Professor in 1972. He was named the Lee Otterson Professor of Engineering at Stanford University in 1989 and served as Chairman of the Department of Materials Science and Engineering from 1991 to 1996. He

  17. Magnetic Resonance Facility (Fact Sheet)

    SciTech Connect

    Not Available

    2012-03-01

    This fact sheet provides information about Magnetic Resonance Facility capabilities and applications at NREL's National Bioenergy Center. Liquid and solid-state analysis capability for a variety of biomass, photovoltaic, and materials characterization applications across NREL. NREL scientists analyze solid and liquid samples on three nuclear magnetic resonance (NMR) spectrometers as well as an electron paramagnetic resonance (EPR) spectrometer.

  18. Current Partners > Partnerships > The Energy Materials Center at Cornell

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    In This Section Why Partnerships? Current Partners Project Updates News & Events Resources Join PARTNERSHIPS Why Partnerships? ›Project Updates ›News + Events › Current Partners Some of our partner companies appear below. More information about each of these, and other partners coming soon. General Motors Honeoye Falls, NY Primet Precision Materials Ithaca, NY Ford Motor Corporation Dearborn, MI

  19. Nanoparticles > Complex Oxides > Research > The Energy Materials Center at

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Cornell Nanoparticles The nanoparticle synthesis efforts at EMC2 mostly take place in the Frank DiSalvo group, and focus on preparing useful fuel cell electrocatalysts in nanoparticle form. The research groups in EMC2 (formerly the Cornell Fuel Cell Institute) have discovered that bulk ordered intermetallic compounds- a class of solid materials that are made of multiple metals, but are not random alloys- show impressive resistance to poisoning as anode catalysts, and amazing activity for

  20. Center for Materials at Irradiation and Mechanical Extremes: Los Alamos Lab

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Contacts Project Office Director Michael Nastasi (505) 667-7007 Co-Director Amit Misra (505) 667-9860 cmime@lanl.gov Resources Employment Opportunities News Related EFRC News - What are EFRCs? - Another LANL EFRC - Materials at Extremes EFRCs Upcoming Events Scientific Hypotheses Absorption and recombination of point and line defects at interfaces Hypotheses: The atomic structure of the interface controls the absorption, emission, storage and annihilation of defects at the interface. Misfit

  1. Energy Frontier Research Center Materials Science of Actinides (A "Life at the Frontiers of Energy Research" contest entry from the 2011 Energy Frontier Research Centers (EFRCs) Summit and Forum)

    ScienceCinema

    Burns, Peter (Director, Materials Science of Actinides); MSA Staff

    2011-11-03

    'Energy Frontier Research Center Materials Science of Actinides' was submitted by the EFRC for Materials Science of Actinides (MSA) to the 'Life at the Frontiers of Energy Research' video contest at the 2011 Science for Our Nation's Energy Future: Energy Frontier Research Centers (EFRCs) Summit and Forum. Twenty-six EFRCs created short videos to highlight their mission and their work. MSA is directed by Peter Burns at the University of Notre Dame, and is a partnership of scientists from ten institutions.The Office of Basic Energy Sciences in the U.S. Department of Energy's Office of Science established the 46 Energy Frontier Research Centers (EFRCs) in 2009. These collaboratively-organized centers conduct fundamental research focused on 'grand challenges' and use-inspired 'basic research needs' recently identified in major strategic planning efforts by the scientific community. The overall purpose is to accelerate scientific progress toward meeting the nation's critical energy challenges.

  2. Energy Frontier Research Center Materials Science of Actinides (A "Life at the Frontiers of Energy Research" contest entry from the 2011 Energy Frontier Research Centers (EFRCs) Summit and Forum)

    SciTech Connect

    Burns, Peter; MSA Staff

    2011-05-01

    'Energy Frontier Research Center Materials Science of Actinides' was submitted by the EFRC for Materials Science of Actinides (MSA) to the 'Life at the Frontiers of Energy Research' video contest at the 2011 Science for Our Nation's Energy Future: Energy Frontier Research Centers (EFRCs) Summit and Forum. Twenty-six EFRCs created short videos to highlight their mission and their work. MSA is directed by Peter Burns at the University of Notre Dame, and is a partnership of scientists from ten institutions.The Office of Basic Energy Sciences in the U.S. Department of Energy's Office of Science established the 46 Energy Frontier Research Centers (EFRCs) in 2009. These collaboratively-organized centers conduct fundamental research focused on 'grand challenges' and use-inspired 'basic research needs' recently identified in major strategic planning efforts by the scientific community. The overall purpose is to accelerate scientific progress toward meeting the nation's critical energy challenges.

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

    SciTech Connect

    Mackiewicz-Ludtka, G.; Ludtka, G.M.; Ray, P.; Magee, J.

    2010-09-10

    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 ORNLs 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 ORNLs 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 ORNLs 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

  4. 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

    Hong, Yang-Ki; Haskew, Timothy; Myryasov, Oleg; Jin, Sungho; Berkowitz, Ami

    2014-06-05

    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.

  5. Undergraduate Research at the Center for Energy Efficient Materials (A "Life at the Frontiers of Energy Research" contest entry from the 2011 Energy Frontier Research Centers (EFRCs) Summit and Forum

    SciTech Connect

    Bowers, John; CEEM Staff

    2011-05-01

    'Undergraduate Research at the Center for Energy Efficient Materials (CEEM)' was submitted by CEEM to the 'Life at the Frontiers of Energy Research' video contest at the 2011 Science for Our Nation's Energy Future: Energy Frontier Research Centers (EFRCs) Summit and Forum. Twenty-six EFRCs created short videos to highlight their mission and their work. CEEM, an EFRC directed by John Bowers at the University of California, Santa Barbara is a partnership of scientists from four institutions: UC, Santa Barbara (lead), UC, Santa Cruz, Los Alamos National Laboratory, and National Renewable Energy Laboratory. The Office of Basic Energy Sciences in the U.S. Department of Energy's Office of Science established the 46 Energy Frontier Research Centers (EFRCs) in 2009. These collaboratively-organized centers conduct fundamental research focused on 'grand challenges' and use-inspired 'basic research needs' recently identified in major strategic planning efforts by the scientific community. The overall purpose is to accelerate scientific progress toward meeting the nation's critical energy challenges. The mission of the Center for Energy Efficient Materials is 'to discover and develop materials that control the interactions between light, electricity, and heat at the nanoscale for improved solar energy conversion, solid-state lighting, and conversion of heat into electricity.' Research topics are: solar photovoltaic, photonic, solid state lighting, optics, thermoelectric, bio-inspired, electrical energy storage, batteries, battery electrodes, novel materials synthesis, and scalable processing.

  6. Undergraduate Research at the Center for Energy Efficient Materials (A "Life at the Frontiers of Energy Research" contest entry from the 2011 Energy Frontier Research Centers (EFRCs) Summit and Forum

    ScienceCinema

    Bowers, John (Director, Center for Energy Efficient Materials ); CEEM Staff

    2016-07-12

    'Undergraduate Research at the Center for Energy Efficient Materials (CEEM)' was submitted by CEEM to the 'Life at the Frontiers of Energy Research' video contest at the 2011 Science for Our Nation's Energy Future: Energy Frontier Research Centers (EFRCs) Summit and Forum. Twenty-six EFRCs created short videos to highlight their mission and their work. CEEM, an EFRC directed by John Bowers at the University of California, Santa Barbara is a partnership of scientists from four institutions: UC, Santa Barbara (lead), UC, Santa Cruz, Los Alamos National Laboratory, and National Renewable Energy Laboratory. The Office of Basic Energy Sciences in the U.S. Department of Energy's Office of Science established the 46 Energy Frontier Research Centers (EFRCs) in 2009. These collaboratively-organized centers conduct fundamental research focused on 'grand challenges' and use-inspired 'basic research needs' recently identified in major strategic planning efforts by the scientific community. The overall purpose is to accelerate scientific progress toward meeting the nation's critical energy challenges. The mission of the Center for Energy Efficient Materials is 'to discover and develop materials that control the interactions between light, electricity, and heat at the nanoscale for improved solar energy conversion, solid-state lighting, and conversion of heat into electricity.' Research topics are: solar photovoltaic, photonic, solid state lighting, optics, thermoelectric, bio-inspired, electrical energy storage, batteries, battery electrodes, novel materials synthesis, and scalable processing.

  7. Executive Summaries for the Hydrogen Storage Materials Center of Excellence- Chemical Hydrogen Storage CoE, Hydrogen Sorption CoE, and Metal Hydride CoE

    Energy.gov [DOE]

    This report contains the executive summaries of the final technical reports from the three Hydrogen Storage Centers of Excellence that operated from 2005 through 2010 to develop advanced hydrogen storage materials in the areas of Chemical Hydrogen Storage Materials, Hydrogen Sorbents, and Reversible Metal Hydrides.

  8. Correlation between charge transfer and exchange coupling in carbon-based magnetic materials

    SciTech Connect

    Nguyen, Anh Tuan; Nguyen, Van Thanh; Nguyen, Huy Sinh; Pham, Thi Tuan Anh; Do, Viet Thang; Dam, Hieu Chi

    2015-10-15

    Several forms of carbon-based magnetic materials, i.e. single radicals, radical dimers, and alternating stacks of radicals and diamagnetic molecules, have been investigated using density-functional theory with dispersion correction and full geometry optimization. Our calculated results demonstrate that the C{sub 31}H{sub 15} (R{sub 4}) radical has a spin of ½. However, in its [R{sub 4}]{sub 2} dimer structure, the net spin becomes zero due to antiferromagnetic spin-exchange between radicals. To avoid antiferromagnetic spin-exchange of identical face-to-face radicals, eight alternating stacks, R{sub 4}/D{sub 2m}/R{sub 4} (with m = 3-10), were designed. Our calculated results show that charge transfer (Δn) between R{sub 4} radicals and the diamagnetic molecule D{sub 2m} occurs with a mechanism of spin exchange (J) in stacks. The more electrons that transfer from R{sub 4} to D{sub 2m}, the stronger the ferromagnetic spin-exchange in stacks. In addition, our calculated results show that Δn can be tailored by adjusting the electron affinity (E{sub a}) of D{sub 2m}. The correlation between Δn, E{sub a}, m, and J is discussed. These results give some hints for the design of new ferromagnetic carbon-based materials.

  9. Suboxide/subnitride formation on Ta masks during magnetic material etching by reactive plasmas

    SciTech Connect

    Li, Hu; Muraki, Yu; Karahashi, Kazuhiro; Hamaguchi, Satoshi

    2015-07-15

    Etching characteristics of tantalum (Ta) masks used in magnetoresistive random-access memory etching processes by carbon monoxide and ammonium (CO/NH{sub 3}) or methanol (CH{sub 3}OH) plasmas have been examined by mass-selected ion beam experiments with in-situ surface analyses. It has been suggested in earlier studies that etching of magnetic materials, i.e., Fe, Ni, Co, and their alloys, by such plasmas is mostly due to physical sputtering and etch selectivity of the process arises from etch resistance (i.e., low-sputtering yield) of the hard mask materials such as Ta. In this study, it is shown that, during Ta etching by energetic CO{sup +} or N{sup +} ions, suboxides or subnitrides are formed on the Ta surface, which reduces the apparent sputtering yield of Ta. It is also shown that the sputtering yield of Ta by energetic CO{sup +} or N{sup +} ions has a strong dependence on the angle of ion incidence, which suggests a correlation between the sputtering yield and the oxidation states of Ta in the suboxide or subnitride; the higher the oxidation state of Ta, the lower is the sputtering yield. These data account for the observed etch selectivity by CO/NH{sub 3} and CH{sub 3}OH plasmas.

  10. Anomalous magnetic behavior in nanocomposite materials of reduced graphene oxide-Ni/NiFe{sub 2}O{sub 4}

    SciTech Connect

    Kollu, Pratap E-mail: anirmalagrace@vit.ac.in; Prathapani, Sateesh; Varaprasadarao, Eswara K.; Mallick, Sudhanshu; Bahadur, D. E-mail: anirmalagrace@vit.ac.in; Santosh, Chella; Grace, Andrews Nirmala E-mail: anirmalagrace@vit.ac.in

    2014-08-04

    Magnetic Reduced Graphene Oxide-Nickel/NiFe{sub 2}O{sub 4} (RGO-Ni/NF) nanocomposite has been synthesized by one pot solvothermal method. Respective phase formations and their purities in the composite are confirmed by High Resolution Transmission Electron Microscope and X Ray Diffraction, respectively. For the RGO-Ni/NF composite material finite-size effects lead to the anomalous magnetic behavior, which is corroborated in temperature and field dependent magnetization curves. Here, we are reporting the behavior of higher magnetization values for Zero Field Cooled condition to that of Field Cooled for the RGO-Ni/NF nanocomposite. Also, the observed negative and positive moments in Hysteresis loops at relatively smaller applied fields (100?Oe and 200?Oe) are explained on the basis of surface spin disorder.

  11. Magnetic Systems Mimic Granular Materials | U.S. DOE Office of...

    Office of Science (SC)

    ... magnetic x-ray photon correlation spectroscopy" that uses coherent x-ray beams (similar to laser light) whose energy is tuned to resonantly interact with atomic magnetic moments. ...

  12. Thermal and high magnetic field treatment of materials and associated apparatus

    DOEpatents

    Kisner, Roger A.; Wilgen, John B.; Ludtka, Gerard M.; Jaramillo, Roger A.; Mackiewicz-Ludtka, Gail

    2010-06-29

    An apparatus and method for altering characteristics, such as can include structural, magnetic, electrical, optical or acoustical characteristics, of an electrically-conductive workpiece utilizes a magnetic field within which the workpiece is positionable and schemes for thermally treating the workpiece by heating or cooling techniques in conjunction with the generated magnetic field so that the characteristics of the workpiece are effected by both the generated magnetic field and the thermal treatment of the workpiece.

  13. Thermal and high magnetic field treatment of materials and associated apparatus

    DOEpatents

    Kisner, Roger A.; Wilgen, John B.; Ludtka, Gerard M.; Jaramillo, Roger A.; Mackiewicz-Ludtka, Gail

    2007-01-09

    An apparatus and method for altering characteristics, such as can include structural, magnetic, electrical, optical or acoustical characteristics, of an electrically-conductive workpiece utilizes a magnetic field within which the workpiece is positionable and schemes for thermally treating the workpiece by heating or cooling techniques in conjunction with the generated magnetic field so that the characteristics of the workpiece are effected by both the generated magnetic field and the thermal treatment of the workpiece.

  14. Dynamic high pressure process for fabricating superconducting and permanent magnetic materials

    DOEpatents

    Nellis, William J.; Maple, M. Brian; Geballe, Theodore H.

    1988-01-01

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

  15. Dynamic high pressure process for fabricating superconducting and permanent magnetic materials

    DOEpatents

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

    1987-10-23

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

  16. Center for Nonlinear Studies

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Applied Geophysical Experiences Materials Design Calendar NSEC Center for Nonlinear Studies Center for Nonlinear Studies Serving as an interface between mission...

  17. Vanadium oxide based nanostructured materials for catalytic oxidative dehydrogenation of propane : effect of heterometallic centers on the catalyst performance.

    SciTech Connect

    Khan, M. I.; Deb, S.; Aydemir, K.; Alwarthan, A. A.; Chattopadhyay, S.; Miller, J. T.; Marshall, C. L.

    2010-01-01

    Catalytic properties of a series of new class of catalysts materials-[Co{sub 3}(H{sub 2}O){sub 12}V{sub 18}O{sub 42} (XO{sub 4})].24H{sub 2}O (VNM-Co), [Fe{sub 3}(H{sub 2}O){sub 12}V{sub 18}O{sub 42}(XO{sub 4})].24H{sub 2}O (VNM-Fe) (X = V, S) and [H{sub 6}Mn{sub 3}(H{sub 2}O){sub 12}V{sub 18}O{sub 42}(VO{sub 4})].30H{sub 2}O for the oxidative dehydrogenation of propane is studied. The open-framework nanostructures in these novel materials consist of three-dimensional arrays of {l_brace}V{sub 18}O{sub 42}(XO{sub 4}){r_brace} (X = V, S) clusters interconnected by {l_brace}-O-M-O-{r_brace} (M = Mn, Fe, Co) linkers. The effect of change in the heterometallic center M (M = Mn, Co, Fe) of the linkers on the catalyst performance was studied. The catalyst material with Co in the linker showed the best performance in terms of propane conversion and selectivity at 350 C. The material containing Fe was most active but least selective and Mn containing catalyst was least active. The catalysts were characterized by Temperature Programmed Reduction (TPR), BET surface area measurement, Diffuse Reflectance Infrared Fourier Transform Spectroscopy, and X-ray Absorption Spectroscopy. TPR results show that all three catalysts are easily reducible and therefore are active at relatively low temperature. In situ X-ray absorption near edge spectroscopy (XANES) and extended X-ray absorption fine structure spectroscopy (EXAFS) studies revealed that the oxidation state of Co(II) remained unchanged up to 425 C (even after pretreatment). The reduction of Co(II) into metallic form starts at 425 C and this process is completed at 600 C.

  18. Inverse Design: Playing "Jeopardy" in Materials Science (A "Life at the Frontiers of Energy Research" contest entry from the 2011 Energy Frontier Research Centers (EFRCs) Summit and Forum)

    SciTech Connect

    Alex Zunger; Tumas, Bill; CID Staff

    2011-05-01

    'Inverse Design: Playing 'Jeopardy' in Materials Science' was submitted by the Center for Inverse Design (CID) to the 'Life at the Frontiers of Energy Research' video contest at the 2011 Science for Our Nation's Energy Future: Energy Frontier Research Centers (EFRCs) Summit and Forum. Twenty-six EFRCs created short videos to highlight their mission and their work. CID, an EFRC directed by Bill Tumas at the National Renewable Energy Laboratory is a partnership of scientists from five institutions: NREL (lead), Northwestern University, University of Colorado, Stanford University, and Oregon State University. The Office of Basic Energy Sciences in the U.S. Department of Energy's Office of Science established the 46 Energy Frontier Research Centers (EFRCs) in 2009. These collaboratively-organized centers conduct fundamental research focused on 'grand challenges' and use-inspired 'basic research needs' recently identified in major strategic planning efforts by the scientific community. The overall purpose is to accelerate scientific progress toward meeting the nation's critical energy challenges. The mission of the Center for Inverse Design is 'to replace trial-and-error methods used in the development of materials for solar energy conversion with an inverse design approach powered by theory and computation.' Research topics are: solar photovoltaic, photonic, metamaterial, defects, spin dynamics, matter by design, novel materials synthesis, and defect tolerant materials.

  19. Inverse Design: Playing "Jeopardy" in Materials Science (A "Life at the Frontiers of Energy Research" contest entry from the 2011 Energy Frontier Research Centers (EFRCs) Summit and Forum)

    ScienceCinema

    Alex Zunger (former Director, Center for Inverse Design); Tumas, Bill (Director, Center for Inverse Design); CID Staff

    2011-11-02

    'Inverse Design: Playing 'Jeopardy' in Materials Science' was submitted by the Center for Inverse Design (CID) to the 'Life at the Frontiers of Energy Research' video contest at the 2011 Science for Our Nation's Energy Future: Energy Frontier Research Centers (EFRCs) Summit and Forum. Twenty-six EFRCs created short videos to highlight their mission and their work. CID, an EFRC directed by Bill Tumas at the National Renewable Energy Laboratory is a partnership of scientists from five institutions: NREL (lead), Northwestern University, University of Colorado, Stanford University, and Oregon State University. The Office of Basic Energy Sciences in the U.S. Department of Energy's Office of Science established the 46 Energy Frontier Research Centers (EFRCs) in 2009. These collaboratively-organized centers conduct fundamental research focused on 'grand challenges' and use-inspired 'basic research needs' recently identified in major strategic planning efforts by the scientific community. The overall purpose is to accelerate scientific progress toward meeting the nation's critical energy challenges. The mission of the Center for Inverse Design is 'to replace trial-and-error methods used in the development of materials for solar energy conversion with an inverse design approach powered by theory and computation.' Research topics are: solar photovoltaic, photonic, metamaterial, defects, spin dynamics, matter by design, novel materials synthesis, and defect tolerant materials.

  20. Induced magnetic anisotropy in Si-free nanocrystalline soft magnetic materials: A transmission x-ray diffraction study

    SciTech Connect

    Parsons, R. Suzuki, K.; Yanai, T.; Kishimoto, H.; Kato, A.; Ohnuma, M.

    2015-05-07

    In order to better understand the origin of field-induced anisotropy (K{sub u}) in Si-free nanocrystalline soft magnetic alloys, the lattice spacing of the bcc-Fe phase in nanocrystalline Fe{sub 94?x}Nb{sub 6}B{sub x} (x?=?10, 12, 14) alloys annealed under an applied magnetic field has been investigated by X-ray diffraction in transmission geometry (t-XRD) with the diffraction vector parallel and perpendicular to the field direction. The saturation magnetostriction (?{sub s}) of nanocrystalline Fe{sub 94?x}Nb{sub 6}B{sub x} was found to increase linearly with the volume fraction of the residual amorphous phase and is well described by taking into account the volume-weighted average of two local ?{sub s} values for the bcc-Fe nanocrystallites (?5??2?ppm) and the residual amorphous matrix (+8??2?ppm). The lattice distortion required to produce the measured K{sub u} values (?100?J/m{sup 3}) was estimated via the inverse magnetostrictive effect using the measured ?{sub s} values and was compared to the lattice spacing estimations made by t-XRD. The lattice strain required to produce K{sub u} under the magnetoelastic model was not observed by the t-XRD experiments and so the findings of this study suggest that the origin of magnetic field induced K{sub u} cannot be explained through the magnetoelastic effect.

  1. The Center for Material Science of Nuclear Fuel (A "Life at the Frontiers of Energy Research" contest entry from the 2011 Energy Frontier Research Centers (EFRCs) Summit and Forum)

    ScienceCinema

    Allen, Todd (Director, Center for Material Science of Nuclear Fuel); CMSNF Staff

    2016-07-12

    'The Center for Material Science of Nuclear Fuel (CMSNF)' was submitted by the CMSNF to the 'Life at the Frontiers of Energy Research' video contest at the 2011 Science for Our Nation's Energy Future: Energy Frontier Research Centers (EFRCs) Summit and Forum. Twenty-six EFRCs created short videos to highlight their mission and their work. CMSNF, an EFRC directed by Todd Allen at the Idaho National Laboratory is a partnership of scientists from six institutions: INL (lead), Colorado School of Mines, University of Florida, Florida State University, Oak Ridge National Laboratory, and the University of Wisconsin at Madison. The Office of Basic Energy Sciences in the U.S. Department of Energy's Office of Science established the 46 Energy Frontier Research Centers (EFRCs) in 2009. These collaboratively-organized centers conduct fundamental research focused on 'grand challenges' and use-inspired 'basic research needs' recently identified in major strategic planning efforts by the scientific community. The overall purpose is to accelerate scientific progress toward meeting the nation's critical energy challenges. The mission of the Center for Materials Science of Nuclear Fuels is 'to achieve a first-principles based understanding of the effect of irradiation-induced defects and microstructures on thermal transport in oxide nuclear fuels.' Research topics are: phonons, thermal conductivity, nuclear, extreme environment, radiation effects, defects, and matter by design.

  2. The Center for Material Science of Nuclear Fuel (A "Life at the Frontiers of Energy Research" contest entry from the 2011 Energy Frontier Research Centers (EFRCs) Summit and Forum)

    SciTech Connect

    Allen, Todd; CMSNF Staff

    2011-05-01

    'The Center for Material Science of Nuclear Fuel (CMSNF)' was submitted by the CMSNF to the 'Life at the Frontiers of Energy Research' video contest at the 2011 Science for Our Nation's Energy Future: Energy Frontier Research Centers (EFRCs) Summit and Forum. Twenty-six EFRCs created short videos to highlight their mission and their work. CMSNF, an EFRC directed by Todd Allen at the Idaho National Laboratory is a partnership of scientists from six institutions: INL (lead), Colorado School of Mines, University of Florida, Florida State University, Oak Ridge National Laboratory, and the University of Wisconsin at Madison. The Office of Basic Energy Sciences in the U.S. Department of Energy's Office of Science established the 46 Energy Frontier Research Centers (EFRCs) in 2009. These collaboratively-organized centers conduct fundamental research focused on 'grand challenges' and use-inspired 'basic research needs' recently identified in major strategic planning efforts by the scientific community. The overall purpose is to accelerate scientific progress toward meeting the nation's critical energy challenges. The mission of the Center for Materials Science of Nuclear Fuels is 'to achieve a first-principles based understanding of the effect of irradiation-induced defects and microstructures on thermal transport in oxide nuclear fuels.' Research topics are: phonons, thermal conductivity, nuclear, extreme environment, radiation effects, defects, and matter by design.

  3. Final Technical Report on DE-SC00002460 [Bimetallic or trimetallic materials with structural metal centers based on Mn, Fe or V

    SciTech Connect

    Takeuchi, Esther Sans; Takeuchi, Kenneth James; Marschilok, Amy Catherine

    2013-07-26

    Bimetallic or trimetallic materials with structural metal centers based on Mn, Fe or V were investigated under this project. These metal centers are the focus of this research as they have high earth abundance and have each shown success as cathode materials in lithium batteries. Silver ion, Ag{sup +}, was initially selected as the displacement material as reduction of this center should result in increased conductivity as Ag{sup 0} metal particles are formed in-situ upon electrochemical reduction. The in-situ formation of metal nanoparticles upon electrochemical reduction has been previously noted, and more recently, we have investigated the resulting increase in conductivity. Layered materials as well as materials with tunnel or channel type structures were selected. Layered materials are of interest as they can provide 2-dimensional ion mobility. Tunnel or channel structures are also of interest as they provide a rigid framework that should remain stable over many discharge/charge cycles. We describe some examples of materials we have synthesized that demonstrate promising electrochemistry.

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

    DOEpatents

    Kochen, Robert L. (Boulder, CO); Navratil, James D. (Simi Valley, CA)

    1997-01-21

    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.

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

    DOEpatents

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

    1997-01-21

    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.

  6. MAGNETS

    DOEpatents

    Hofacker, H.B.

    1958-09-23

    This patent relates to nmgnets used in a calutron and more particularly to means fur clamping an assembly of magnet coils and coil spacers into tightly assembled relation in a fluid-tight vessel. The magnet comprises windings made up of an assembly of alternate pan-cake type coils and spacers disposed in a fluid-tight vessel. At one end of the tank a plurality of clamping strips are held firmly against the assembly by adjustable bolts extending through the adjacent wall. The foregoing arrangement permits taking up any looseness which may develop in the assembly of coils and spacers.

  7. Facilities and Centers | Argonne National Laboratory

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Facilities and Centers Center for Electrical Energy Storage Argonne Tandem Linac Accelerator System Argonne-Northwestern Solar Energy Research Center Center for Nanoscale Materials ...

  8. Final Report: MATERIALS, STRANDS, AND CABLES FOR SUPERCONDUCTING ACCELERATOR MAGNETS [Grant Number DE-SC0010312

    SciTech Connect

    Sumption, Mike; Collings, E.

    2014-10-29

    Our program consisted of the two components: Strand Research and Cable Research, with a focus on Nb3Sn, Bi2212, and YBCO for accelerator magnet applications. We demonstrated a method to refine the grains in Nb3Sn by a factor of two, reaching 45 nm grain sizes, and layer Jcs of 6 kA/mm2 at 12 T. W also measured conductor magnetization for field quality. This has been done both with Nb3Sn conductor, as well as Bi:2212 strand. Work in support of quench studies of YBCO coils was also performed. Cable loss studies in Nb3Sn focused on connecting and comparing persistent magnetization and coupling magnetization for considering their relative impact on HEP machines. In the area of HTS cables, we have investigated both the quench in multistrand YBCO CORC cables, as well as the magnetization of these cables for use in high field magnets. In addition, we examined the magnetic and thermal properties of large (50 T) solenoids.

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

    DOEpatents

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

    1998-04-28

    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.

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

    DOEpatents

    Gschneidner, Jr., Karl A.; Pecharsky, Vitalij K.

    1998-04-28

    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.

  11. Method for preparing high cure temperature rare earth iron compound magnetic material

    DOEpatents

    Huang, Yuhong; Wei, Qiang; Zheng, Haixing

    2002-01-01

    Insertion of light elements such as H,C, or N in the R.sub.2 Fe.sub.17 (R=rare earth metal) series has been found to modify the magnetic properties of these compounds, which thus become prospective candidates for high performance permanent magnets. The most spectacular changes are increases of the Curie temperature, T.sub.c, of the magnetization, M.sub.s, and of coercivity, H.sub.c, upon interstitial insertion. A preliminary product having a component R--Fe--C,N phase is produced by a chemical route. Rare earth metal and iron amides are synthesized followed by pyrolysis and sintering in an inert or reduced atmosphere, as a result of which, the R--Fe--C,N phases are formed. Fabrication of sintered rare earth iron nitride and carbonitride bulk magnet is impossible via conventional process due to the limitation of nitridation method.

  12. Magnetic Force Microscopy Study of Zr2Co11 -Based Nanocrystalline Materials: Effect of Mo Addition

    DOE PAGES [OSTI]

    Yue, Lanping; Jin, Yunlong; Zhang, Wenyong; Sellmyer, David J.

    2015-01-01

    Tmore » he addition of Molybdenum was used to modify the nanostructure and enhance coercivity of rare-earth-free Zr2Co11-based nanocrystalline permanent magnets. he effect of Mo addition on magnetic domain structures of melt spun nanocrystalline Zr16Co84-xMox(x=0, 0.5, 1, 1.5, and 2.0) ribbons has been investigated. It was found that magnetic properties and local domain structures are strongly influenced by Mo doping. he coercivity of the samples increases with the increase in Mo content (x≤1.5). he maximum energy product(BH)maxincreases with increasingxfrom 0.5 MGOe forx=0to a maximum value of 4.2 MGOe forx=1.5. he smallest domain size with a relatively short magnetic correlation length of 128 nm and largest root-mean-square phase shiftΦrmsvalue of 0.66° are observed for thex=1.5. he optimal Mo addition promotes magnetic domain structure refinement and thus leads to a significant increase in coercivity and energy product in this sample.« less

  13. Center for Materials at Irradiation and Mechanical Extremes at LANL (A "Life at the Frontiers of Energy Research" contest entry from the 2011 Energy Frontier Research Centers (EFRCs) Summit and Forum)

    ScienceCinema

    Michael Nastasi (Director, Center for Materials at Irradiation and Mechanical Extremes); CMIME Staff

    2011-11-03

    'Center for Materials at Irradiation and Mechanical Extremes (CMIME) at LANL' was submitted by CMIME to the 'Life at the Frontiers of Energy Research' video contest at the 2011 Science for Our Nation's Energy Future: Energy Frontier Research Centers (EFRCs) Summit and Forum. Twenty-six EFRCs created short videos to highlight their mission and their work. CMIME, an EFRC directed by Michael Nastasi at Los Alamos National Laboratory is a partnership of scientists from four institutions: LANL (lead), Carnegia Mellon University, the University of Illinois at Urbana Champaign, and the Massachusetts Institute of Technology. The Office of Basic Energy Sciences in the U.S. Department of Energy's Office of Science established the 46 Energy Frontier Research Centers (EFRCs) in 2009. These collaboratively-organized centers conduct fundamental research focused on 'grand challenges' and use-inspired 'basic research needs' recently identified in major strategic planning efforts by the scientific community. The overall purpose is to accelerate scientific progress toward meeting the nation's critical energy challenges.

  14. Center for Materials at Irradiation and Mechanical Extremes at LANL (A "Life at the Frontiers of Energy Research" contest entry from the 2011 Energy Frontier Research Centers (EFRCs) Summit and Forum)

    SciTech Connect

    Michael Nastasi; CMIME Staff

    2011-05-01

    'Center for Materials at Irradiation and Mechanical Extremes (CMIME) at LANL' was submitted by CMIME to the 'Life at the Frontiers of Energy Research' video contest at the 2011 Science for Our Nation's Energy Future: Energy Frontier Research Centers (EFRCs) Summit and Forum. Twenty-six EFRCs created short videos to highlight their mission and their work. CMIME, an EFRC directed by Michael Nastasi at Los Alamos National Laboratory is a partnership of scientists from four institutions: LANL (lead), Carnegia Mellon University, the University of Illinois at Urbana Champaign, and the Massachusetts Institute of Technology. The Office of Basic Energy Sciences in the U.S. Department of Energy's Office of Science established the 46 Energy Frontier Research Centers (EFRCs) in 2009. These collaboratively-organized centers conduct fundamental research focused on 'grand challenges' and use-inspired 'basic research needs' recently identified in major strategic planning efforts by the scientific community. The overall purpose is to accelerate scientific progress toward meeting the nation's critical energy challenges.

  15. Executive Summaries for the Hydrogen Storage Materials Center of Excellence - Chemical Hydrogen Storage CoE, Hydrogen Sorption CoE, and Metal Hydride CoE

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Executive Summaries for the Hydrogen Storage Materials Centers of Excellence Chemical Hydrogen Storage CoE, Hydrogen Sorption CoE, and Metal Hydride CoE Period of Performance: 2005-2010 Fuel Cell Technologies Program Office of Energy Efficiency and Renewable Energy U. S. Department of Energy April 2012 2 3 Primary Authors: Chemical Hydrogen Storage (CHSCoE): Kevin Ott, Los Alamos National Laboratory Hydrogen Sorption (HSCoE): Lin Simpson, National Renewable Energy Laboratory Metal Hydride

  16. U.S. Rare Earth Magnet Patents Table | Critical Materials Institute

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Policy Analysts This page features the most requested EIA reports and features for policy analysts. If you can't find what you're looking for, please contact the EIA Information Center. Featured Links Responses to Congressional and other requests Congressional testimony Analysis papers from Annual Energy Outlook Financial data and analysis Environmental data and analysis National Energy Modeling System (NEMS) documentation Energy in Brief Maps Featured Reports Annual Energy Outlook International

  17. Materials

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Materials Materials Access to Hopper Phase II (Cray XE6) If you are a current NERSC user, you are enabled to use Hopper Phase II. Use your SSH client to connect to Hopper II:...

  18. History of Resistance Welding Oxide Dispersion Strengthened Cladding and other High Temperature Materials at Center for Advanced Energy Studies

    SciTech Connect

    Larry Zirker; Nathan Jerred; Dr. Indrajit Charit; James Cole

    2012-03-01

    Research proposal 08-1079, 'A Comparative Study of Welded ODS Cladding Materials for AFCI/GNEP,' was funded in 2008 under an Advanced Fuel Cycle Initiative (AFCI) Research and Development Funding Opportunity, number DE-PS07-08ID14906. Th proposal sought to conduct research on joining oxide dispersion strengthen (ODS) tubing material to a solid end plug. This document summarizes the scientific and technical progress achieved during the project, which ran from 2008 to 2011.

  19. 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

    2012-01-01

    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.

  20. Effect of substitutional defects on Kambersky damping in L1{sub 0} magnetic materials

    SciTech Connect

    Qu, T.; Victora, R. H.

    2015-02-16

    Kambersky damping, representing the loss of magnetic energy from the electrons to the lattice through the spin orbit interaction, is calculated for L1{sub 0} FePt, FePd, CoPt, and CoPd alloys versus chemical degree of order. When more substitutional defects exist in the alloys, damping is predicted to increase due to the increase of the spin-flip channels allowed by the broken symmetry. It is demonstrated that this corresponds to an enhanced density of states (DOS) at the Fermi level, owing to the rounding of the DOS with loss of long-range order. Both the damping and the DOS of the Co-based alloy are found to be less affected by the disorder. Pd-based alloys are predicted to have lower damping than Pt-based alloys, making them more suitable for high density spintronic applications.

  1. The Ohio State University Bioproducts Innovation Center Sustainable...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Ohio State University Bioproducts Innovation Center Sustainable Materials Networking Event The Ohio State University Bioproducts Innovation Center Sustainable Materials Networking...

  2. Instability growth for magnetized liner inertial fusion seeded by electro-thermal, electro-choric, and material strength effects

    SciTech Connect

    Pecover, J. D.; Chittenden, J. P.

    2015-10-15

    A critical limitation of magnetically imploded systems such as magnetized liner inertial fusion (MagLIF) [Slutz et al., Phys. Plasmas 17, 056303 (2010)] is the magneto-Rayleigh-Taylor (MRT) instability which primarily disrupts the outer surface of the liner. MagLIF-relevant experiments have showed large amplitude multi-mode MRT instability growth growing from surface roughness [McBride et al., Phys. Rev. Lett. 109, 135004 (2012)], which is only reproduced by 3D simulations using our MHD code Gorgon when an artificially azimuthally correlated initialisation is added. We have shown that the missing azimuthal correlation could be provided by a combination of the electro-thermal instability (ETI) and an “electro-choric” instability (ECI); describing, respectively, the tendency of current to correlate azimuthally early in time due to temperature dependent Ohmic heating; and an amplification of the ETI driven by density dependent resistivity around vapourisation. We developed and implemented a material strength model in Gorgon to improve simulation of the solid phase of liner implosions which, when applied to simulations exhibiting the ETI and ECI, gave a significant increase in wavelength and amplitude. Full circumference simulations of the MRT instability provided a significant improvement on previous randomly initialised results and approached agreement with experiment.

  3. Extreme Environments (EFree) Center

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Extreme Environments (EFree ) Center LLNL Co-PI: Jonathon Crowhurst e-mail bio Novel materials for energy applications Ultrafast reflectivity measurements under high pressure...

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

    DOEpatents

    Gschneidner, Jr., Karl A.; Pecharsky, Alexandra O.; Pecharsky, Vitalij K.

    2003-07-08

    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.

  5. LANL Virtual Center for Chemical Hydrogen Storage: Chemical Hydrogen Storage Using Ultra-high Surface Area Main Group Materials

    SciTech Connect

    Susan M. Kauzlarich; Phillip P. Power; Doinita Neiner; Alex Pickering; Eric Rivard; Bobby Ellis, T. M.; Atkins, A. Merrill; R. Wolf; Julia Wang

    2010-09-05

    The focus of the project was to design and synthesize light element compounds and nanomaterials that will reversibly store molecular hydrogen for hydrogen storage materials. The primary targets investigated during the last year were amine and hydrogen terminated silicon (Si) nanoparticles, Si alloyed with lighter elements (carbon (C) and boron (B)) and boron nanoparticles. The large surface area of nanoparticles should facilitate a favorable weight to volume ratio, while the low molecular weight elements such as B, nitrogen (N), and Si exist in a variety of inexpensive and readily available precursors. Furthermore, small NPs of Si are nontoxic and non-corrosive. Insights gained from these studies will be applied toward the design and synthesis of hydrogen storage materials that meet the DOE 2010 hydrogen storage targets: cost, hydrogen capacity and reversibility. Two primary routes were explored for the production of nanoparticles smaller than 10 nm in diameter. The first was the reduction of the elemental halides to achieve nanomaterials with chloride surface termination that could subsequently be replaced with amine or hydrogen. The second was the reaction of alkali metal Si or Si alloys with ammonium halides to produce hydrogen capped nanomaterials. These materials were characterized via X-ray powder diffraction, TEM, FTIR, TG/DSC, and NMR spectroscopy.

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

    SciTech Connect

    Kong, Zueqian

    2010-03-15

    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.

  7. Cool Magnetic Molecules

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Conversely, introducing a magnetic field to certain materials will cause the material to heat up. This happens because, as the spins in such (paramagnetic) materials align with...

  8. Mineral Magnetism

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Mineral Magnetism 1663 Los Alamos science and technology magazine Latest Issue:July 2016 past issues All Issues » submit Mineral Magnetism By understanding what makes a material magnetic, scientists want to create new strongly magnetic materials that don't rely on hard-to-get precursor elements. March 8, 2016 Small piles of rare earth elements In the United States, rare-earth elements used in strong magnets, such as neodymium and samarium, are scarce due to limits on foreign sources. CREDIT:

  9. Magnetic shielding

    DOEpatents

    Kerns, John A.; Stone, Roger R.; Fabyan, Joseph

    1987-01-01

    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.

  10. Magnetic shielding

    DOEpatents

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

    1987-10-06

    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.

  11. Functional Materials

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Functional Materials Researchers in NETL's Functional Materials Development competency work to discover and develop advanced functional materials and component processing technologies to meet technology performance requirements and enable scale-up for proof-of-concept studies. Research includes separations materials and electrochemical and magnetic materials, specifically: Separations Materials Synthesis, purification, and basic characterization of organic substances, including polymers and

  12. Magnetic Refrigeration | GE Global Research

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Johnson, a materials scientist and project leader on GE's magnetic refrigeration project. ... materials would further improve the competitiveness of magnetic refrigeration technology. ...

  13. Co-Design Center

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Co-Design Center Co-Design Center Enabling a new era of computational and scientific capabilities by advancing high-performance computing on an exponential scale. Contact Timothy Germann Physics and Chemistry of Materials (505) 665-9772 Email Co-Design Center for Particle-Based Methods: From Quantum to Classical, Molecular to Cosmological This co-design center will serve as a centralized clearinghouse for particle-based ECP applications, communicating their requirements and evaluating potential

  14. Magnetic shielding

    DOEpatents

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

    1985-02-12

    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.

  15. Final Technical Report for the Energy Frontier Research Center Understanding Charge Separation and Transfer at Interfaces in Energy Materials (EFRC:CST)

    SciTech Connect

    Vanden Bout, David A.

    2015-09-14

    Our EFRC was founded with the vision of creating a broadly collaborative and synergistic program that would lead to major breakthroughs in the molecular-level understanding of the critical interfacial charge separation and charge transfer (CST) processes that underpin the function of candidate materials for organic photovoltaic (OPV) and electrical-energy-storage (EES) applications. Research in these energy contexts shares an imposing challenge: How can we understand charge separation and transfer mechanisms in the presence of immense materials complexity that spans multiple length scales? To address this challenge, our 50-member Center undertook a total of 28 coordinated research projects aimed at unraveling the CST mechanisms that occur at interfaces in these nanostructured materials. This rigorous multi-year study of CST interfaces has greatly illuminated our understanding of early-timescale processes (e.g., exciton generation and dissociation dynamics at OPV heterojunctions; control of Li+-ion charging kinetics by surface chemistry) occurring in the immediate vicinity of interfaces. Program outcomes included: training of 72 graduate student and postdoctoral energy researchers at 5 institutions and spanning 7 academic disciplines in science and engineering; publication of 94 peer-reviewed journal articles; and dissemination of research outcomes via 340 conference, poster and other presentations. Major scientific outcomes included: implementation of a hierarchical strategy for understanding the electronic communication mechanisms and ultimate fate of charge carriers in bulk heterojunction OPV materials; systematic investigation of ion-coupled electron transfer processes in model Li-ion battery electrode/electrolyte systems; and the development and implementation of 14 unique technologies and instrumentation capabilities to aid in probing sub-ensemble charge separation and transfer mechanisms.

  16. Organic Light-Emitting Diodes (OLEDs) and Optically-Detected Magnetic Resonance (ODMR) studies on organic materials

    SciTech Connect

    Cai, Min

    2011-01-01

    Organic semiconductors have evolved rapidly over the last decades and currently are considered as the next-generation technology for many applications, such as organic light-emitting diodes (OLEDs) in flat-panel displays (FPDs) and solid state lighting (SSL), and organic solar cells (OSCs) in clean renewable energy. This dissertation focuses mainly on OLEDs. Although the commercialization of the OLED technology in FPDs is growing and appears to be just around the corner for SSL, there are still several key issues that need to be addressed: (1) the cost of OLEDs is very high, largely due to the costly current manufacturing process; (2) the efficiency of OLEDs needs to be improved. This is vital to the success of OLEDs in the FPD and SSL industries; (3) the lifetime of OLEDs, especially blue OLEDs, is the biggest technical challenge. All these issues raise the demand for new organic materials, new device structures, and continued lower-cost fabrication methods. In an attempt to address these issues, we used solution-processing methods to fabricate highly efficient small molecule OLEDs (SMOLEDs); this approach is costeffective in comparison to the more common thermal vacuum evaporation. We also successfully made efficient indium tin oxide (ITO)-free SMOLEDs to further improve the efficiency of the OLEDs. We employed the spin-dependent optically-detected magnetic resonance (ODMR) technique to study the luminescence quenching processes in OLEDs and organic materials in order to understand the intrinsic degradation mechanisms. We also fabricated polymer LEDs (PLEDs) based on a new electron-accepting blue-emitting polymer and studied the effect of molecular weight on the efficiency of PLEDs. All these studies helped us to better understand the underlying relationship between the organic semiconductor materials and the OLEDs’ performance, and will subsequently assist in further enhancing the efficiency of OLEDs. With strongly improved device performance (in addition to

  17. The Nature of the Distinctive Microscopic Features in R5(SixGe1-x)4 Magnetic Refrigeration Materials

    SciTech Connect

    Ozan Ugurlu

    2006-05-01

    Magnetic refrigeration is a promising technology that offers a potential for high energy efficiency. The giant magnetocaloric effect of the R{sub 5}(Si{sub x}, Ge{sub 1-x}){sub 4} alloys (where R=rare-earth and O {le} x {le} 1), which was discovered in 1997, make them perfect candidates for magnetic refrigeration applications. In this study the microstructures of Gd{sub 5}(Si{sub x}Ge{sub 1-x}){sub 4} alloys have been characterized using electron microscopy techniques, with the focus being on distinctive linear features first examined in 1999. These linear features have been observed in R{sub 5}(Si{sub x}, Ge{sub 1-x}){sub 4} alloys prepared from different rare-earths (Gd, Tb, Dy and Er) with different crystal structures (Gd{sub 5}Si{sub 4}-type orthorhombic, monoclinic and Gd{sub 5}Ge{sub 4}-type orthorhombic). Systematic scanning electron microscope studies revealed that these linear features are actually thin-plates, which grow along specific directions in the matrix material. The crystal structure of the thin-plates has been determined as hexagonal with lattice parameters a=b=8.53 {angstrom} and c=6.40 {angstrom} using selected area diffraction (SAD). Energy dispersive spectroscopy analysis, carried out in both scanning and transmission electron microscopes, showed that the features have a composition approximating to R{sub 5}(Si{sub x},Ge{sub 1-x}){sub 3}.phase. Orientation relationship between the matrix and the thin-plates has been calculated as [- 1010](1-211){sub p}//[010](10-2){sub m}. The growth direction of the thin plates are calculated as (22 0 19) and (-22 0 19) by applying the Ag approach of Zhang and Purdy to the SAD patterns of this system. High Resolution TEM images of the Gd{sub 5}Ge{sub 4} were used to study the crystallographic relationship. A terrace-ledge structure was observed at the interface and a 7{sup o} rotation of the reciprocal lattices with respect to each other, consistent with the determined orientation relationship, was noted

  18. Magnetic Materials (MM)

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

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

  19. Magnetic Materials Group - Staff

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    davegag@aps.anl.gov Visiting Scientists, Post-Docs, & Students Lawrie Skinner Rick Weber Vladimir Stoica Lawrie Skinner Research Asst. Prof. Stony Brook 432B003 (630)...

  20. Center for Nanophase Materials Sciences

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    neutron scattering of deuterated block copolymers demonstrates how an applied electric field (left) alters structure and performance Energy filtered TEM of P3HT and P3HT-b-PEO...

  1. About Us | Energy Frontier Research Centers

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    understanding of how advanced thermoelectric materials function and the design and synthesis of such materials. Focus The Center for Revolutionary Materials for Solid State...

  2. Autonomic Materials for Smarter, Safer, Longer-Lasting Batteries (A "Life at the Frontiers of Energy Research" contest entry from the 2011 Energy Frontier Research Centers (EFRCs) Summit and Forum)

    ScienceCinema

    Thackeray, Michael (Director, Center for Electrical Energy Storage); CEES Staff

    2016-07-12

    'Autonomic Materials for Smarter, Safer, Longer-Lasting Batteries' was submitted by the Center for Electrical Energy Storage (CEES) to the 'Life at the Frontiers of Energy Research' video contest at the 2011 Science for Our Nation's Energy Future: Energy Frontier Research Centers (EFRCs) Summit and Forum. Twenty-six EFRCs created short videos to highlight their mission and their work. CEES, an EFRC directed by Michael Thackery at Argonne National Laboratory is a partnership of scientists from three institutions: ANL (lead), Northwestern University, and the University of Illinois at Urbana-Champaign. The Office of Basic Energy Sciences in the U.S. Department of Energy's Office of Science established the 46 Energy Frontier Research Centers (EFRCs) in 2009. These collaboratively-organized centers conduct fundamental research focused on 'grand challenges' and use-inspired 'basic research needs' recently identified in major strategic planning efforts by the scientific community. The overall purpose is to accelerate scientific progress toward meeting the nation's critical energy challenges. The mission of the Center for Electrical Energy Storage is 'to acquire a fundamental understanding of interfacial phenomena controlling electrochemical processes that will enable dramatic improvements in the properties and performance of energy storage devices, notable Li ion batteries.' Research topics are: electrical energy storage, batteries, battery electrodes, electrolytes, adaptive materials, interfacial characterization, matter by design; novel materials synthesis, charge transport, and defect tolerant materials.

  3. Autonomic Materials for Smarter, Safer, Longer-Lasting Batteries (A "Life at the Frontiers of Energy Research" contest entry from the 2011 Energy Frontier Research Centers (EFRCs) Summit and Forum)

    SciTech Connect

    Thackeray, Michael; CEES Staff

    2011-05-01

    'Autonomic Materials for Smarter, Safer, Longer-Lasting Batteries' was submitted by the Center for Electrical Energy Storage (CEES) to the 'Life at the Frontiers of Energy Research' video contest at the 2011 Science for Our Nation's Energy Future: Energy Frontier Research Centers (EFRCs) Summit and Forum. Twenty-six EFRCs created short videos to highlight their mission and their work. CEES, an EFRC directed by Michael Thackery at Argonne National Laboratory is a partnership of scientists from three institutions: ANL (lead), Northwestern University, and the University of Illinois at Urbana-Champaign. The Office of Basic Energy Sciences in the U.S. Department of Energy's Office of Science established the 46 Energy Frontier Research Centers (EFRCs) in 2009. These collaboratively-organized centers conduct fundamental research focused on 'grand challenges' and use-inspired 'basic research needs' recently identified in major strategic planning efforts by the scientific community. The overall purpose is to accelerate scientific progress toward meeting the nation's critical energy challenges. The mission of the Center for Electrical Energy Storage is 'to acquire a fundamental understanding of interfacial phenomena controlling electrochemical processes that will enable dramatic improvements in the properties and performance of energy storage devices, notable Li ion batteries.' Research topics are: electrical energy storage, batteries, battery electrodes, electrolytes, adaptive materials, interfacial characterization, matter by design; novel materials synthesis, charge transport, and defect tolerant materials.

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

    SciTech Connect

    Maple, Brian; Jeffires, Jason

    2006-07-28

    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).

  5. Polymer Engineering Center

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Polymer Engineering Center University of Wisconsin-Madison Experimental and Numerical Studies of the Temperature Field in Selective Laser Sintering to Improve Shrinkage and Warpage Prediction Prof. Dr.-Ing. Natalie Rudolph Polymer Engineering Center Department of Mechanical Engineering University of Wisconsin-Madison 1513 University Ave Madison, WI 53706 Advanced Qualification of Additive Manufacturing Materials Workshop, July 20-21, 2015 in Santa Fe, NM Polymer Engineering Center University of

  6. Magnetic coherence in cuprate superconductors (Journal Article...

    Office of Scientific and Technical Information (OSTI)

    Subject: 36 MATERIALS SCIENCE; HIGH-TC SUPERCONDUCTORS; LANTHANUM OXIDES; STRONTIUM OXIDES; COPPER OXIDES; COHERENCE LENGTH; NEUTRON DIFFRACTION; MAGNETIZATION; MAGNETIC ...

  7. Polymer Engineering Center

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Powder bed fusion: SLS Material extrusion: FDM Directed energy depos.: AFP v v v F q ... Pfeifer, 2015 4" Polymer Engineering Center University of Wisconsin-Madison Layup on cold ...

  8. Rewritable Artificial Magnetic Charge Ice | Argonne National Laboratory

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Rewritable Artificial Magnetic Charge Ice June 17, 2016 Tweet EmailPrint Artificial ices enable the study of geometrical frustration by design and through direct observation. However, it has proven difficult to achieve tailored long-range ordering of their diverse configurations, limiting both fundamental and applied research directions. A team of researchers using the Center for Nanoscale Materials (CNM) designed an artificial spin structure that produces a magnetic charge ice with tunable

  9. magnets | National Nuclear Security Administration

    National Nuclear Security Administration (NNSA)

    magnets NNSA-lab-created new magnets will power renewable technology The Ion Beam Materials Laboratory at NNSA's Los Alamos National Laboratory (LANL) works to characterize and ...

  10. Vehicle Technologies Office Merit Review 2015: GATE Center of Excellence at UAB for Lightweight Materials and Manufacturing for Automotive, Truck and Mass Transit

    Office of Energy Efficiency and Renewable Energy (EERE)

    Presentation given by University of Alabama Birmingham at 2015 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about GATE Center...

  11. Vehicle Technologies Office Merit Review 2014: GATE Center of Excellence at UAB for Lightweight Materials and Manufacturing for Automotive, Truck and Mass Transit

    Office of Energy Efficiency and Renewable Energy (EERE)

    Presentation given by University of Alabama at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about GATE Center of...

  12. Iron dominated magnets

    SciTech Connect

    Fischer, G.E.

    1985-07-01

    These two lectures on iron dominated magnets are meant for the student of accelerator science and contain general treatments of the subjects design and construction. The material is arranged in the categories: General Concepts and Cost Considerations, Profile Configuration and Harmonics, Magnetic Measurements, a few examples of ''special magnets'' and Materials and Practices. Extensive literature is provided.

  13. Magnetic nanohole superlattices

    DOEpatents

    Liu, Feng

    2013-05-14

    A magnetic material is disclosed including a two-dimensional array of carbon atoms and a two-dimensional array of nanoholes patterned in the two-dimensional array of carbon atoms. The magnetic material has long-range magnetic ordering at a temperature below a critical temperature Tc.

  14. Magnetically attached sputter targets

    DOEpatents

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

    1994-02-15

    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.

  15. Center for Functional Nanomaterials

    ScienceCinema

    BNL

    2009-09-01

    Staff from Brookhaven's new Center for Functional Nanomaterials (CFN) describe how this advanced facility will focus on the development and understanding of nanoscale materials. The CFN provides state-of-the-art capabilities for the fabrication and study of nanoscale materials, with an emphasis on atomic-level tailoring to achieve desired properties and functions. The overarching scientific theme of the CFN is the development and understanding of nanoscale materials that address the Nation's challenges in energy security.

  16. Contact us | Energy Frontier Research Centers

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Contact us Home Director Donald T Morelli Professor of Materials Science and Director, MSUDOE Energy Frontier Research Center Department of Chemical Engineering & Materials...

  17. Fundamental Scientific Problems in Magnetic Recording

    SciTech Connect

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

    2007-06-27

    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.

  18. Effect of La{sub 2}O{sub 3}, CoO, Cr{sub 2}O{sub 3} and MoO{sub 3} nucleating agents on crystallization behavior and magnetic properties of ferromagnetic glass-ceramic in the system Fe{sub 2}O{sub 3}{center_dot}CaO{center_dot}ZnO{center_dot}SiO{sub 2}

    SciTech Connect

    Abdel-Hameed, Salwa A.M.; Elwan, Rawhia L.

    2012-05-15

    Highlights: Black-Right-Pointing-Pointer Crystallization of magnetic glass ceramic with different nucleating agents. Black-Right-Pointing-Pointer The effect of La{sub 2}O{sub 3}, CoO, Cr{sub 2}O{sub 3} and MoO{sub 3} as nucleating agents was studied. Black-Right-Pointing-Pointer XRD for as prepared samples revealed crystallization of pure magnetite. Black-Right-Pointing-Pointer Heat treatment revealed minor calcium silicate, hematite and cristobalite. Black-Right-Pointing-Pointer TEM revealed crystallization of crystallite size in the range 50-100 nm. -- Abstract: Preparation and characterization of ferromagnetic glass ceramic in the system Fe{sub 2}O{sub 3}{center_dot}CaO{center_dot}ZnO{center_dot}SiO{sub 2} with different nucleating agents was studied. The effect of La{sub 2}O{sub 3}, CoO, Cr{sub 2}O{sub 3} and MoO{sub 3} as nucleating agents was investigated. Differential thermal analysis; X-ray diffraction and transmission electron microscope were used to investigate thermal behavior, sequence of crystallization and microstructure of the samples. XRD analysis for as prepared samples revealed the crystallization of single magnetite phase. Heat treatment at 900 Degree-Sign C/2 h revealed the appearance of minor amounts of calcium silicate, hematite and cristobalite beside magnetite. TEM revealed crystallization of crystallite size in the range 50-100 nm. Lattice parameters, cell volume and crystallite size were stimulated from XRD data. Magnetic properties of quenched samples were measured under 20 kG.

  19. Facility for low-temperature spin-polarized-scanning tunneling microscopy studies of magnetic/spintronic materials prepared in situ by nitride molecular beam epitaxy

    SciTech Connect

    Lin, Wenzhi; Foley, Andrew; Alam, Khan; Wang, Kangkang; Liu, Yinghao; Chen, Tianjiao; Pak, Jeongihm; Smith, Arthur R.

    2014-04-15

    Based on the interest in, as well as exciting outlook for, nitride semiconductor based structures with regard to electronic, optoelectronic, and spintronic applications, it is compelling to investigate these systems using the powerful technique of spin-polarized scanning tunneling microscopy (STM), a technique capable of achieving magnetic resolution down to the atomic scale. However, the delicate surfaces of these materials are easily corrupted by in-air transfers, making it unfeasible to study them in stand-alone ultra-high vacuum STM facilities. Therefore, we have carried out the development of a hybrid system including a nitrogen plasma assisted molecular beam epitaxy/pulsed laser epitaxy facility for sample growth combined with a low-temperature, spin-polarized scanning tunneling microscope system. The custom-designed molecular beam epitaxy growth system supports up to eight sources, including up to seven effusion cells plus a radio frequency nitrogen plasma source, for epitaxially growing a variety of materials, such as nitride semiconductors, magnetic materials, and their hetero-structures, and also incorporating in situ reflection high energy electron diffraction. The growth system also enables integration of pulsed laser epitaxy. The STM unit has a modular design, consisting of an upper body and a lower body. The upper body contains the coarse approach mechanism and the scanner unit, while the lower body accepts molecular beam epitaxy grown samples using compression springs and sample skis. The design of the system employs two stages of vibration isolation as well as a layer of acoustic noise isolation in order to reduce noise during STM measurements. This isolation allows the system to effectively acquire STM data in a typical lab space, which during its construction had no special and highly costly elements included, (such as isolated slabs) which would lower the environmental noise. The design further enables tip exchange and tip coating without

  20. Mesoporous Co{sub 3}O{sub 4} nanostructured material synthesized by one-step soft-templating: A magnetic study

    SciTech Connect

    Poyraz, Altug S.; Kuo, Chung-Hao; Li, Nan; Hines, William A. Perry, David M.; Suib, Steven L.

    2014-03-21

    A combined magnetization and zero-field {sup 59}Co spin-echo nuclear magnetic resonance (NMR) study has been carried out on one member of a recently developed class of highly ordered mesoporous nanostructured materials, mesoporous Co{sub 3}O{sub 4} (designated UCT-8, University of Connecticut, mesoporous materials). The material was synthesized using one-step soft-templating by an inverse micelles packing approach. Characterization of UCT-8 by powder x-ray diffraction and electron microscopy reveals that the mesostructure consists of random close-packed Co{sub 3}O{sub 4} nanoparticles ??12?nm in diameter. The N{sub 2} sorption isotherm for UCT-8, which is type IV with a type H1 hysteresis loop, yields a 134 m{sup 2}/g BET surface area and a 7.7?nm BJH desorption pore diameter. The effect of heat treatment on the structure is discussed. The antiferromagnetic Co{sub 3}O{sub 4} nanoparticles have a Nel temperature T{sub N}?=?27?K, somewhat lower than the bulk. A fit to the Curie-Weiss law over the temperature range 75?K???T???300?K yields an effective magnetic moment of ?{sub eff}?=?4.36??{sub B} for the Co{sup 2+} ions, indicative of some orbital contribution, and a Curie-Weiss temperature ??=??93.5?K, consistent with antiferromagnetic ordering. The inter-sublattice and intra-sublattice exchange constants for the Co{sup 2+} ions are J{sub 1}/k{sub B}?=?(?)4.75?K and J{sub 2}/k{sub B}?=?(?)0.87?K, respectively, both corresponding to antiferromagnetic coupling. The presence of uncompensated surface spins is observed below T{sub N} with shifts in the hysteresis loops, i.e., an exchange-bias effect. The {sup 59}Co NMR spectrum for UCT-8, which is attributed to Co{sup 2+} ions at the tetrahedral A sites, is asymmetrically broadened with a peak at ?55?MHz (T?=?4.2?K). Since there is cubic symmetry at the A-sites, the broadening is indicative of a magnetic field distribution due to the uncompensated surface spins. The spectrum is consistent with antiferromagnetically

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

    SciTech Connect

    Maple, M. Brian

    2005-09-13

    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

  2. Cool Magnetic Molecules

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    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....

  3. CNEEC - Center Goals

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Goals Concept of the integrated center The overarching goal of the Center is to increase the efficiency of energy conversion by manipulating materials at the nanometer scale. We develop advanced fabrication and characterization methodologies to understand how nanostructuring can optimize light absorption through quantum and optical confinement and improve catalysis through theory-driven design. Each is manipulated to improve performance and efficiency in energy conversion and storage devices.

  4. LANSCE | Lujan Center | Highlights

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    The Lujan Center: Science & People The Lujan Center, Science & People April 2014 In This Issue: * Olivier Gourdon: A crystallographer keen on showing off the revealing properties of neutrons *Seeking design rules for efficient lighting sources * Rate-dependent deformation mechanisms in beryllium * Improved understanding of a semiconductor used in infrared detectors * Mike Fitzsimmons elected NNSA Fellow * Pressure tuning: a new approach for making zero thermal expansion materials *

  5. Engineers Create room-temperatuer multiferroic material > EMC2 News > The

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Energy Materials Center at Cornell Engineers Create room-temperatuer multiferroic material September 22nd, 2016 › By Tom Fleischman Emily Ryan, Megan Holtz/Provided The magnetoelectric multiferroic created by a group led by Darrell Schlom, the Herbert Fisk Johnson Professor of Industrial Chemistry. The double strand of purple represents the extra layer of iron oxide, which makes the material a multiferroic at near room temperature. Multiferroics - materials that exhibit both magnetic and

  6. Comparison of the order of magnetic phase transitions in several magnetocaloric materials using the rescaled universal curve, Banerjee and mean field theory criteria

    SciTech Connect

    Burrola-Gándara, L. A. Santillan-Rodriguez, C. R.; Rivera-Gomez, F. J.; Saenz-Hernandez, R. J.; Botello-Zubiate, M. E.; Matutes-Aquino, J. A.

    2015-05-07

    Magnetocaloric materials with second order phase transition near the Curie temperature can be described by critical phenomena theory. In this theory, scaling, universality, and renormalization are key concepts from which several phase transition order criteria are derived. In this work, the rescaled universal curve, Banerjee and mean field theory criteria were used to make a comparison for several magnetocaloric materials including pure Gd, SmCo{sub 1.8}Fe{sub 0.2}, MnFeP{sub 0.46}As{sub 0.54}, and La{sub 0.7}Ca{sub 0.15}Sr{sub 0.15}MnO{sub 3}. Pure Gd, SmCo{sub 1.8}Fe{sub 0.2}, and La{sub 0.7}Ca{sub 0.15}Sr{sub 0.15}MnO{sub 3} present a collapse of the rescaled magnetic entropy change curves into a universal curve, which indicates a second order phase transition; applying Banerjee criterion to H/σ vs σ{sup 2} Arrot plots and the mean field theory relation |ΔS{sub M}| ∝ (μ{sub 0}H/T{sub c}){sup 2/3} for the same materials also determines a second order phase transition. However, in the MnFeP{sub 0.46}As{sub 0.54} sample, the Banerjee criterion applied to the H/σ vs σ{sup 2} Arrot plot indicates a first order magnetic phase transition, while the mean field theory prediction for a second order phase transition, |ΔS{sub M}| ∝ (μ{sub 0}H/T{sub c}){sup 2/3}, describes a second order behavior. Also, a mixture of first and second order behavior was indicated by the rescaled universal curve criterion. The diverse results obtained for each criterion in MnFeP{sub 0.46}As{sub 0.54} are apparently related to the magnetoelastic effect and to the simultaneous presence of weak and strong magnetism in Fe (3f) and Mn (3g) alternate atomic layers, respectively. The simultaneous application of the universal curve, the Banerjee and the mean field theory criteria has allowed a better understanding about the nature of the order of the phase transitions in different magnetocaloric materials.

  7. operations center

    National Nuclear Security Administration (NNSA)

    servers and other critical Operations Center equipment

  8. Independent air supply system filtered to protect against biological and radiological agents (99.7%).
  9. <...

  10. Help Center

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Los Alamos National Laboratory Advanced Simulation and Computing Menu Events Partnerships Help Center Events Partnerships Help Center Videos Advanced Simulation and Computing Program » Help Center Computing Help Center Help hotlines, hours of operation, training, technical assistance, general information Los Alamos National Laboratory Hours: Monday through Friday, 8:00 a.m. - noon, 1:00-5:00 p.m. Mountain time Telephone: (505) 665-4444 option 3 Fax: (505) 665-6333 E-mail: consult@lanl.gov 24

  11. Y-12 History Center | Y-12 National Security Complex

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Y-12 History Center Y-12 History Center Located within the New Hope Center at Y-12, the History Center houses a fascinating collection of informational materials and historical...

  12. Origin of the positive spin-12 photoluminescence-detected magnetic resonance in π-conjugated materials and devices

    DOE PAGES [OSTI]

    Chen, Ying; Cai, Min; Hellerich, Emily; Shinar, Ruth; Shinar, Joseph

    2015-09-02

    The spin-1/2 single-modulation (SM) and double-modulation (DM) photoluminescence (PL) detected magnetic resonance (PLDMR) in poly(2-methoxy-5-(2'-ethyl)–hexoxy-1,4- phenylene vinylene) (MEH-PPV) films and poly(3-hexylthiophene) (P3HT) films is described, analyzed, and discussed. In particular, the models based on spin-dependent recombination of charge pairs (SDR) and triplet-polaron quenching (TPQ) are evaluated. By analyzing the dependence of the resonance amplitude on the microwave chopping (modulation) frequency using rate equations, it is demonstrated that the TPQ model can well explain the observed resonance behavior, while SDR model cannot reproduce the results of the observed DM-PLDMR. As a result, the observed spin-1/2 PLDMR is assigned to TPQ rathermore » than SDR, even though the latter may also be present.« less

  13. Ames Lab 101: Magnetic Refrigeration

    SciTech Connect

    Pecharsky, Vitalij

    2011-01-01

    Vitalij Pecharsky, distinguished professor of materials science and engineering, discusses his research in magnetic refrigeration at Ames Lab.

  14. Ames Lab 101: Magnetic Refrigeration

    ScienceCinema

    Pecharsky, Vitalij

    2013-03-01

    Vitalij Pecharsky, distinguished professor of materials science and engineering, discusses his research in magnetic refrigeration at Ames Lab.

  15. Magnet design considerations for Fusion Nuclear Science Facility

    DOE PAGES [OSTI]

    Zhai, Yuhu; Kessel, Chuck; El-guebaly, Laila; Titus, Peter

    2016-02-25

    The Fusion Nuclear Science Facility (FNSF) is a nuclear confinement facility to provide a fusion environment with components of the reactor integrated together to bridge the technical gaps of burning plasma and nuclear science between ITER and the demonstration power plant (DEMO). Compared to ITER, the FNSF is smaller in size but generates much higher magnetic field, 30 times higher neutron fluence with 3 orders of magnitude longer plasma operation at higher operating temperatures for structures surrounding the plasma. Input parameters to the magnet design from system code analysis include magnetic field of 7.5 T at the plasma center withmore » plasma major radius of 4.8 m and minor radius of 1.2 m, and a peak field of 15.5 T on the TF coils for FNSF. Both low temperature superconductor (LTS) and high temperature superconductor (HTS) are considered for the FNSF magnet design based on the state-of-the-art fusion magnet technology. The higher magnetic field can be achieved by using the high performance ternary Restack Rod Process (RRP) Nb3Sn strands for toroidal field (TF) magnets. The circular cable-in-conduit conductor (CICC) design similar to ITER magnets and a high aspect ratio rectangular CICC design are evaluated for FNSF magnets but low activation jacket materials may need to be selected. The conductor design concept and TF coil winding pack composition and dimension based on the horizontal maintenance schemes are discussed. Neutron radiation limits for the LTS and HTS superconductors and electrical insulation materials are also reviewed based on the available materials previously tested. As a result, the material radiation limits for FNSF magnets are defined as part of the conceptual design studies for FNSF magnets.« less

  16. Cool Magnetic Molecules

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    (Gd). While some of this research is focused on materials that would operate near room temperature, Karotsis et al. here investigate the magnetic cooling properties of...

  17. A HUMAN RELIABILITY-CENTERED APPROACH TO THE DEVELOPMENT OF JOB AIDS FOR REVIEWERS OF MEDICAL DEVICES THAT USE RADIOLOGICAL BYPRODUCT MATERIALS.

    SciTech Connect

    COOPER, S.E.; BROWN, W.S.; WREATHALL, J.

    2005-02-02

    The U.S. Nuclear Regulatory Commission (NRC) is engaged in an initiative to risk-inform the regulation of byproduct materials. Operating experience indicates that human actions play a dominant role in most of the activities involving byproduct materials, which are radioactive materials other than those used in nuclear power plants or in weapons production, primarily for medical or industrial purposes. The overall risk of these activities is strongly influenced by human performance. Hence, an improved understanding of human error, its causes and contexts, and human reliability analysis (HRA) is important in risk-informing the regulation of these activities. The development of the human performance job aids was undertaken by stages, with frequent interaction with the prospective users. First, potentially risk significant human actions were identified based on reviews of available risk studies for byproduct material applications and of descriptions of events for byproduct materials applications that involved potentially significant human actions. Applications from the medical and the industrial domains were sampled. Next, the specific needs of the expected users of the human performance-related capabilities were determined. To do this, NRC headquarters and region staff were interviewed to identify the types of activities (e.g., license reviews, inspections, event assessments) that need HRA support and the form in which such support might best be offered. Because the range of byproduct uses regulated by NRC is so broad, it was decided that initial development of knowledge and tools would be undertaken in the context of a specific use of byproduct material, which was selected in consultation with NRC staff. Based on needs of NRC staff and the human performance related characteristics of the context chosen, knowledge resources were then compiled to support consideration of human performance issues related to the regulation of byproduct materials. Finally, with

  18. Materials Videos

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Materials Videos Materials

  19. Superconducting Magnet Technology for Future Hadron Colliders

    SciTech Connect

    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.

    1994-10-01

    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.

  20. Data Center Metering and Power Usage Effectiveness

    Energy.gov [DOE]

    Webinar will cover material from the Data Center Metering and Resource Guide, including how to diagnose data center type, necessary metering, and how to calculate power usage effectiveness (PUE).

  21. National High Magnetic Field Laboratory moves closer

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    researchers to carefully tune material parameters while perfectly reproducing the non-invasive magnetic field. Such high magnetic fields confine electrons to nanometer scale...

  22. Disorder-Induced Microscopic Magnetic Memory

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Disorder-Induced Microscopic Magnetic Memory Print The magnetic-recording industry deliberately introduces carefully controlled disorder into its materials to obtain the desired...

  1. Comments on "Guiding Center Plasma Models in Three D

    SciTech Connect

    J.A. Krommes

    2009-05-29

    Recent assertions that guiding-center theory breaks down at second order for 3D magnetic fields with nonzero torsion are argued to be incorrect. __________________________________________________

  2. Nanocomposite Magnets: Transformational Nanostructured Permanent Magnets

    SciTech Connect

    2010-10-01

    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.

  3. Magnetic infrasound sensor

    DOEpatents

    Mueller, Fred M. (Los Alamos, NM); Bronisz, Lawrence (Los Alamos, NM); Grube, Holger (Los Alamos, NM); Nelson, David C. (Santa Fe, NM); Mace, Jonathan L. (Los Alamos, NM)

    2006-11-14

    A magnetic infrasound sensor is produced by constraining a permanent magnet inside a magnetic potential well above the surface of superconducting material. The magnetic infrasound sensor measures the position or movement of the permanent magnet within the magnetic potential well, and interprets the measurements. Infrasound sources can be located and characterized by combining the measurements from one or more infrasound sensors. The magnetic infrasound sensor can be tuned to match infrasound source types, resulting in better signal-to-noise ratio. The present invention can operate in frequency modulation mode to improve sensitivity and signal-to-noise ratio. In an alternate construction, the superconductor can be levitated over a magnet or magnets. The system can also be driven, so that time resolved perturbations are sensed, resulting in a frequency modulation version with improved sensitivity and signal-to-noise ratio.

  4. Joint China-United States Report for Year 1 Insulation Materials and Systems Project Area Clean Energy Research Center Building Energy Efficiency (CERC-BEE)

    SciTech Connect

    Stovall, Therese K; Biswas, Kaushik; Song, Bo; Zhang, Sisi

    2012-08-01

    In November of 2009, the presidents of China and the U.S. announced the establishment of the Clean Energy Research Center (CERC). This broad research effort is co-funded by both countries and involves a large number of research centers and universities in both countries. One part of this program is focused on improving the energy efficiency of buildings. One portion of the CERC-BEE was focused on building insulation systems. The research objective of this effort was to Identify and investigate candidate high performance fire resistant building insulation technologies that meet the goal of building code compliance for exterior wall applications in green buildings in multiple climate zones. A Joint Work Plan was established between researchers at the China Academy of Building Research and Oak Ridge National Laboratory. Efforts in the first year under this plan focused on information gathering. The objective of this research program is to reduce building energy use in China via improved building insulation technology. In cold regions in China, residents often use inefficient heating systems to provide a minimal comfort level within inefficient buildings. In warmer regions, air conditioning has not been commonly used. As living standards rise, energy consumption in these regions will increase dramatically unless significant improvements are made in building energy performance. Previous efforts that defined the current state of the built environment in China and in the U.S. will be used in this research. In countries around the world, building improvements have typically followed the implementation of more stringent building codes. There have been several changes in building codes in both the U.S. and China within the last few years. New U.S. building codes have increased the amount of wall insulation required in new buildings. New government statements from multiple agencies in China have recently changed the requirements for buildings in terms of energy efficiency and

  5. Feed Materials Production Center. Final phase-in report volume 11 of 15 waste management, October 25, 1985--December 31, 1985

    SciTech Connect

    Watts, R.E.

    1986-01-17

    This volume of the Transition Final Report provides the findings, recommendations and corrective actions for the Waste Management areas developed during the phase-in actions by Westinghouse Materials Company (WMCO). The objective is to provide a summary of the studies and investigations performed by the WMCO Company during the transition period. The Waste Management effort at FMPC was expanded in 1984 when a separate group was formed within the NLO organization. This is considered to be an area where significant increase in priority and effort must be applied to resolve waste management problems and to bring the site in conformity to regulations and the Environmental Health/Safety Standards. During the transition, there was a comprehensive investigation in all areas of air, liquid and solid waste management for nuclear, chemical and conventional wastes. Not all of these investigations are documented in this report, but the information gathered was used in the development of the budgets (cost accounts), programs, and organizational planning.

  6. Magnet pole tips

    DOEpatents

    Thorn, C.E.; Chasman, C.; Baltz, A.J.

    1981-11-19

    An improved magnet more easily provides a radially increasing magnetic field, as well as reduced fringe field and requires less power for a given field intensity. The subject invention comprises a pair of spaced, opposed magnetic poles which further comprise a pair of pole roots, each having a pole tip attached to its center. The pole tips define the gap between the magnetic poles and at least a portion of each pole tip is separated from its associated pole root. The separation begins at a predetermined distance from the center of the pole root and increases with increasing radial distance while being constant with azimuth within that portion. Magnets in accordance with the subject invention have been found to be particularly advantageous for use in large isochronous cyclotrons.

  7. Magnet pole tips

    DOEpatents

    Thorn, Craig E. (Wading River, NY); Chasman, Chellis (Setauket, NY); Baltz, Anthony J. (Coram, NY)

    1984-04-24

    An improved magnet which more easily provides a radially increasing magnetic field, as well as reduced fringe field and requires less power for a given field intensity. The subject invention comprises a pair of spaced, opposed magnetic poles which further comprise a pair of pole roots, each having a pole tip attached to its center. The pole tips define the gap between the magnetic poles and at least a portion of each pole tip is separated from its associated pole root. The separation begins at a predetermined distance from the center of the pole root and increases with increasing radial distance while being constant with azimuth within that portion. Magnets in accordance with the subject invention have been found to be particularly advantageous for use in large isochronous cyclotrons.

  8. Electron Microscopy Center | Argonne National Laboratory

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Electron Microscopy Center Electron Microscopy Center The Electron Microscopy Center Group (EMC) develops and maintains unique capabilities for electron beam characterization and applies those capabilities to solve materials challenges. EMC emphasizes three major areas: materials research, experimental technique and instrumentation development, and operation of unique and state-of-the-art instrumentation. The goals of EMC materials research are closely aligned with those of our user community.

  9. Magnetic refrigeration apparatus with heat pipes

    DOEpatents

    Barclay, J.A.; Prenger, F.C. Jr.

    1985-10-25

    A magnetic refrigerator operating in the 4 to 20 K range utilizes heat pipes to transfer heat to and from the magnetic material at the appropriate points during the material's movement. In one embodiment circular disks of magnetic material can be interleaved with the ends of the heat pipes. In another embodiment a mass of magnetic material reciprocatingly moves between the end of the heat pipe or pipes that transmits heat from the object of cooling to the magnetic material and the end of the heat pipe or pipes that transmits heat from the magnetic material to a heat sink.

  10. Magnetic refrigeration apparatus with heat pipes

    DOEpatents

    Barclay, John A.; Prenger, Jr., F. Coyne

    1987-01-01

    A magnetic refrigerator operating in the 4 to 20 K range utilizes heat pipes to transfer heat to and from the magnetic material at the appropriate points during the material's movement. In one embodiment circular disks of magnetic material can be interleaved with the ends of the heat pipes. In another embodiment a mass of magnetic material reciprocatingly moves between the end of the heat pipe of pipes that transmits heat from the object of cooling to the magnetic material and the end of the heat pipe or pipes that transmits heat from the magnetic material to a heat sink.

  11. Energy Frontier Research Center Center for Materials Science...

    Office of Scientific and Technical Information (OSTI)

    finite temperatures approaches will be required for handling this strongly correlated nuclear fuel. * PDOS measurements performed on polycrystalline samples have identified the...

  12. Conventional magnetic superconductors

    DOE PAGES [OSTI]

    Wolowiec, C. T.; White, B. D.; Maple, M. B.

    2015-07-01

    We discuss several classes of conventional magnetic superconductors including the ternary rhodium borides and molybdenum chalcogenides (or Chevrel phases), and the quaternary nickel-borocarbides. These materials exhibit some exotic phenomena related to the interplay between superconductivity and long-range magnetic order including: the coexistence of superconductivity and antiferromagnetic order; reentrant and double reentrant superconductivity, magnetic field induced superconductivity, and the formation of a sinusoidally-modulated magnetic state that coexists with superconductivity. We introduce the article with a discussion of the binary and pseudobinary superconducting materials containing magnetic impurities which at best exhibit short-range “glassy” magnetic order. Early experiments on these materials led tomore » the idea of a magnetic exchange interaction between the localized spins of magnetic impurity ions and the spins of the conduction electrons which plays an important role in understanding conventional magnetic superconductors. Furthermore, these advances provide a natural foundation for investigating unconventional superconductivity in heavy-fermion compounds, cuprates, and other classes of materials in which superconductivity coexists with, or is in proximity to, a magnetically-ordered phase.« less

  13. Conventional magnetic superconductors

    SciTech Connect

    Wolowiec, C. T.; White, B. D.; Maple, M. B.

    2015-07-01

    We discuss several classes of conventional magnetic superconductors including the ternary rhodium borides and molybdenum chalcogenides (or Chevrel phases), and the quaternary nickel-borocarbides. These materials exhibit some exotic phenomena related to the interplay between superconductivity and long-range magnetic order including: the coexistence of superconductivity and antiferromagnetic order; reentrant and double reentrant superconductivity, magnetic field induced superconductivity, and the formation of a sinusoidally-modulated magnetic state that coexists with superconductivity. We introduce the article with a discussion of the binary and pseudobinary superconducting materials containing magnetic impurities which at best exhibit short-range “glassy” magnetic order. Early experiments on these materials led to the idea of a magnetic exchange interaction between the localized spins of magnetic impurity ions and the spins of the conduction electrons which plays an important role in understanding conventional magnetic superconductors. Furthermore, these advances provide a natural foundation for investigating unconventional superconductivity in heavy-fermion compounds, cuprates, and other classes of materials in which superconductivity coexists with, or is in proximity to, a magnetically-ordered phase.

  14. Materials Characterization Center state-of-the-art report on corrosion data pertaining to metallic barriers for nuclear-waste repositories

    SciTech Connect

    Merz, M.D.

    1982-10-01

    A compilation of published corrosion data on metals that have been suggested as canisters and overpack materials is presented. The data were categorized according to the solutions used in testing and divided into two parts: high-ionic strength solutions (such as seawater and brine) and low-ionic-strength waters (such as basalt and tuff waters). This distinction was made primarily because of the general difference in aggressiveness of these solutions with respect to general corrosion. A considerable amount of data indicated that titanium alloys have acceptably low uniform corrosion rates in anticipated repository sites; the other possible corrosion failure modes for titanium alloys, such as stress corrosion cracking and delayed failure due to hydrogen, have not been sufficiently studied to make any similar conclusions about lifetime with respect to these particular degradation processes. Other data suggested that iron-base alloys are sufficiently resistant to corrosion in basalt and tuff waters, although the effects of radiation and radiation combined with elevated temperature have not been reported in enough detail to conclusively qualify iron-base alloys for any particular barrier thickness in regard to uniform corrosion rate. The effect of overpack size on corrosion rate has been given little attention. A review of long-term underground data indicated that temperature and accessibility to oxygen were too different for deep geologic repositories to make the underground corrosion data directly applicable. However, the characteristics of corrosion attack, statistical treatment of data, and kinetics of corrosion showed that corrosion proceeds in a systematic and predictable way.

  15. Center for Inverse Design: Inverse Design Approach

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Inverse Design Approach This page describes the inverse materials design methodology used by the Center for Inverse Design, which integrates and combines the following: (1) theory, ...

  16. Center for Electrochemical Energy Science | Argonne National...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Energy Science Research Program Publications & Presentations News An Energy Frontier Research Center Exploring the electrochemical reactivity of oxide materials and their...

  17. ENERGY FRONTIER RESEARCH CENTERS SCIENCE FOR OUR...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    FRONTIER RESEARCH CENTERS SCIENCE FOR OUR NATION'S ENERGY FUTURE September 2016 CALIFORNIA Light-Material Interactions in Energy Conversion (LMI) California Institute of Technology ...

  18. National Energy Research Scientific Computing Center

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    3,072 Material Simulations in Joint Center for Artificial Photosynthesis (JCAP) PI: Frances A. Houle, Lawrence Berkeley National Laboratory Edison 3,072 LLNL MFE Supercomputing...

  19. Center for Energy Nanoscience at USC

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    Photovoltaics The Center for Energy Nanoscience (CEN) synthesizes a variety of semiconductor nanostructure materials to exploit their unique geometrical, electrical, and optical...

  20. Critical Materials:

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Critical Materials: 1 Technology Assessment 2 Contents 3 1. Introduction to the Technology/System ............................................................................................... 2 4 2. Technology Assessment and Potential ................................................................................................. 5 5 2.1 Major Trends in Selected Clean Energy Application Areas ........................................................... 5 6 2.1.1 Permanent Magnets for Wind

  1. Microsoft Word - TRILATERAL CRITICAL MATERIALS WORKSHOP Summary...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    ... magnetic mechanisms (for nanocomposites, non-rare-earth materials, and neodymium-iron-boron magnets). * Techniques to enhance the stability and texture of nanocomposite structures ...

  2. Dependence of beam emittance on plasma electrode temperature and rf-power, and filter-field tuning with center-gapped rod-filter magnets in J-PARC rf-driven H{sup ?} ion source

    SciTech Connect

    Ueno, A. Koizumi, I.; Ohkoshi, K.; Ikegami, K.; Takagi, A.; Yamazaki, S.; Oguri, H.

    2014-02-15

    The prototype rf-driven H{sup ?} ion-source with a nickel plated oxygen-free-copper (OFC) plasma chamber, which satisfies the Japan Proton Accelerator Research Complex (J-PARC) 2nd stage requirements of a H{sup ?} ion beam current of 60 mA within normalized emittances of 1.5 ? mm mrad both horizontally and vertically, a flat top beam duty factor of 1.25% (500 ?s 25 Hz) and a life-time of more than 50 days, was reported at the 3rd international symposium on negative ions, beams, and sources (NIBS2012). The experimental results of the J-PARC ion source with a plasma chamber made of stainless-steel, instead of nickel plated OFC used in the prototype source, are presented in this paper. By comparing these two sources, the following two important results were acquired. One was that the about 20% lower emittance was produced by the rather low plasma electrode (PE) temperature (T{sub PE}) of about 120?C compared with the typically used T{sub PE} of about 200?C to maximize the beam current for the plasma with the abundant cesium (Cs). The other was that by using the rod-filter magnets with a gap at each center and tuning the gap-lengths, the filter-field was optimized and the rf-power necessary to produce the J-PARC required H{sup ?} ion beam current was reduced typically 18%. The lower rf-power also decreases the emittances.

  3. Permanent Magnet Ecr Plasma Source With Magnetic Field Optimization

    DOEpatents

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

    2000-12-19

    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.

  4. Danforth Center Tour | Photosynthetic Antenna Research Center

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Danforth Center Tour Danforth Center Tour As part of our Events & Topics in Bioenergy and the Environment series, we hosted a tour to the Donald Danforth Plant Science Center to...

  5. Enhanced magnetocaloric effect material

    DOEpatents

    Lewis, Laura J. H.

    2006-07-18

    A magnetocaloric effect heterostructure having a core layer of a magnetostructural material with a giant magnetocaloric effect having a magnetic transition temperature equal to or greater than 150 K, and a constricting material layer coated on at least one surface of the magnetocaloric material core layer. The constricting material layer may enhance the magnetocaloric effect by restriction of volume changes of the core layer during application of a magnetic field to the heterostructure. A magnetocaloric effect heterostructure powder comprising a plurality of core particles of a magnetostructural material with a giant magnetocaloric effect having a magnetic transition temperature equal to or greater than 150 K, wherein each of the core particles is encapsulated within a coating of a constricting material is also disclosed. A method for enhancing the magnetocaloric effect within a giant magnetocaloric material including the step of coating a surface of the magnetocaloric material with a constricting material is disclosed.

  6. Directory - Center for Plasma in the Laboratory and Astrophysics - UW

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Madison Physics Department Directory UW Madison Center for Plasma in the Laboratory and Astrophysics Directory CPLA Home - Experiments Madison Symmetric Torus Madsion Dynamo Experiment Rotating Wall Machine Plasma-Couette Experiment Madison Plasma Dynamo Experiment - Theory Groups MHD Turbulence Transport in Fusion Devices Plasma Astrophysics RFP Theory - Multi-Institutional Centers Center for Magnetic Self Organization Center for Theory and Computation Center for Momentum Transport and Flow

  7. Talks - Publications - Center for Plasma in the Laboratory and Astrophysics

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    - UW Madison Physics Department Talks UW Madison Center for Plasma in the Laboratory and Astrophysics Publications: Talks CPLA Home - Experiments Madison Symmetric Torus Madsion Dynamo Experiment Rotating Wall Machine Plasma-Couette Experiment Madison Plasma Dynamo Experiment - Theory Groups MHD Turbulence Transport in Fusion Devices Plasma Astrophysics RFP Theory - Multi-Institutional Centers Center for Magnetic Self Organization Center for Theory and Computation Center for Momentum

  8. Gluon propagators and center vortices in gluon plasma

    SciTech Connect

    Chernodub, M. N.; Nakagawa, Y.; Nakamura, A.; Saito, T.; Zakharov, V. I.

    2011-06-01

    We study electric and magnetic components of the gluon propagators in quark-gluon plasma in terms of center vortices by using a quenched simulation of SU(2) lattice theory. In the Landau gauge, the magnetic components of the propagators are strongly affected in the infrared region by removal of the center vortices, while the electric components are almost unchanged by this procedure. In the Coulomb gauge, the time-time correlators, including an instantaneous interaction, also have an essential contribution from the center vortices. As a result, one finds that magnetic degrees of freedom in the infrared region couple strongly to the center vortices in the deconfinement phase.

  9. Chemical synthesis, characterizations and magnetic properties...

    Office of Scientific and Technical Information (OSTI)

    PHYSICAL AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; ALLOYS; BCC LATTICES; COERCIVE FORCE; CRYSTALS; LATTICE PARAMETERS; MAGNETIC...

  10. Dramatic impact of the giant local magnetic fields on spin-dependent recombination processes in gadolinium based garnets

    SciTech Connect

    Romanov, N. G. Tolmachev, D. O.; Gurin, A. S.; Uspenskaya, Yu. A.; Asatryan, H. R.; Badalyan, A. G.; Baranov, P. G.; Wieczorek, H.; Ronda, C.

    2015-06-29

    A giant magnetic field effect on spin-dependent recombination of the radiation-induced defects has been found in cerium doped gadolinium based garnet crystals and ceramics, promising materials for scintillator applications. A sharp and strong increase in the afterglow intensity stimulated by external magnetic field and an evidence of the magnetic field memory have been discovered. The effect was ascribed to huge Gd-induced internal magnetic fields, which suppress the recombination, and cross-relaxation with Gd{sup 3+} ions leading to reorientation of the spins of the electron and hole centers. Thus, the spin system of radiation-induced defects in gadolinium garnet based scintillator materials was shown to accumulate significant energy which can be released in external magnetic fields.

  11. ARM - External Data Center

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    govExternal Data Center External Data Center Order Data Description of External Data Streams Data Viewers and Plots (selected data sets) XDC Documentation External Data Center The ...

  12. Information Center | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Center Information Center Congressional Testimony Testimony to Congress by various members of OE. Library Repository of reports and documents; fact sheets; presentations and other documentation from peer review events; and Federal Register notices. Educational Resources Educational material on the generation, transmission, and usage of electricity as well as how the electric grid works and how it needs to be modernized. Reporting Reporting to OE including Electric Disturbance Incidents and

  13. The Center for Nanophase Materials Sciences

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    relationship between the probability of negative entropy producing states (i.e., violations of the second law of thermodynamics), the probability of positive entropy...

  14. Center for Nanophase Materials Sciences - Newsletter

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    alcohol-free facility. The Guest House is a 3 floor, 47 room, 71 bed inn (23 rooms with King beds and 24 rooms with 2 ex-long double beds). All rooms have a mini fridge and...

  15. 2010 > Publications > Research > The Energy Materials Center...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    CV Subban, Q Zhou, A Hu, TE Moylan, FT Wagner and FJ DiSalvo Journal of the American Chemical Society, 132(49), pp 17531-17536, 2010 DOI: 10.1021ja1074163 Pt-Decorated PdCo@PdC...

  16. Center for Nanophase Materials Sciences (CNMS) - Publications

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    M.; Decker, S. .R; Bu, L. T.; Zhao, X. C.; McCabe, C.; Wohlert, J.; Bergenstrahle, M.; Brady, J. W.; Adney, W. S.; Himmel, M. E.; Crowley, M. F., ":The O-Glycosylated Linker from...

  17. Center for Nanophase Materials Sciences - Newsletter January...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    in a cryo-ultra-microtome, to be transferred into the microscope while being held at liquid nitrogen temperatures. Plans are being made for a two day workshop on operating and...

  18. Center for Lightweighting Automotive Materials and Processing

    Energy.gov [DOE]

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

  19. Center for Nanophase Materials Sciences - Conference 2015

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    September 1-2, 2015. Instructions for preparing posters: Tabletop poster boards and adhesive Velcro tabs will be provided for mounting posters. You may bring your poster to the...

  20. Analytical Resources > Research > The Energy Materials Center...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Differential Electrochemical Mass Spectroscopy (DEMS) Electron Microscopy X-Ray Diffraction Analytical Resources Differential Electrochemical Mass Spectroscopy (DEMS) Electron...

  1. Center for Nanophase Materials Sciences - Newsletter

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Oak Ridge National Laboratory in Oak Ridge, Tennessee. The annual user meeting combines oral presentations, poster sessions, workshops and tutorials into a compact program designed...

  2. Center for Nanophase Materials Sciences (CNMS) - Publications

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    ... Res. 47, 6426-6433 (2008). Jang, H. W., S. H. Baek, D. Ortiz, C. M. Folkman, R. R. Das, Y. H. Chu, P. Shafer, J. X. Zhang, S. Choudhury, V. Vaithyanathan, Y. B. Chen, D. A. Felker, ...

  3. Center for Nanophase Materials Sciences - Newsletter

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    its start, it is clear to me the obvious advantages of becoming an active user, and I hope that you will too. The success of CNMS is strongly dependent on the cutting-edge...

  4. 2012 > Publications > Research > The Energy Materials Center...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    ... 10.1021nl301642g Interconversion of Inverse Opals of Electrically Conducting Doped Titanium Oxides and Nitrides CV Subban, IC Smith, FJ DiSalvo Small, 8(18), pp 2824-2832, 2012 ...

  5. Center for Nanophase Materials Sciences - Conference 2015

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    spectroscopy for chemical analysis Organizers: Sergey Shilov and James Burgess (Bruker Optics) Local Contact: Brad Lokitz, ORNL Event overview: Join us to learn about Infrared and...

  6. Center for Lightweighting Automotive Materials and Processing

    Energy.gov [DOE]

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

  7. Why Partnerships? > Partnerships > The Energy Materials Center...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    by funding industry-university joint projects. New York State support of industry partnerships accelerates the technology development pipeline outlined by the DOE. Adapted from ...

  8. Center for Nanophase Materials Sciences - Newsletter January...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    (NIST), Gaithersburg, MD where I lead a project on Nanoparticle Assembly in Complex Fluids. Before joining NIST, I completed my Ph.D. in 2001 in Polymer Science and...

  9. Organic Photovoltaics | Center for Energy Efficient Materials

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Organic Photovoltaics As an overarching goal, the CEEM OPV group seeks to understand conjugated polymer and small molecule semiconductor blends that function as the active layer in solar cell devices. The effort brings together a cohesive and mutually complementary set of experts to understand what may appear at first sight to be unrelated phenomena. Indeed, the collective CEEM OPV effort very recently led to the design, processing, structural characterization, theoretical understanding and

  10. People | Center for Energy Efficient Materials

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    People Administration/Staff Name E-mail Address Telephone Title Allen, Jane jane [at] iee [dot] ucsb [dot] edu (805) 893-3488 Business Officer Auston, David auston [at] iee [dot] ucsb [dot] edu (805) 893-3376 Executive Director Bowers, John bowers [at] ece [dot] ucsb [dot] edu (805) 893-8447 Director Faculty/Researchers Name E-mail Address Telephone Group(s)* Bazan, Guillermo bazan [at] chem [dot] ucsb [dot] edu (805) 893-5538 OPV Bowers, John bowers [at] ece [dot] ucsb [dot] edu (805) 893-8447

  11. Upcoming Events | Center for Energy Efficient Materials

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Upcoming Events Events Upcoming Events Past Events

  12. Center for Nanophase Materials Sciences - Newsletter January...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    The results of the user survey we conducted are presented in this issue. The UEC elections have just concluded, and our users community has elected a new committee to serve...

  13. Center for Nanophase Materials Sciences Strategic Plan

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    ... overall theme of understanding and controlling the complexity of electronic, ionic, and molecular behavior at the nanoscale to enable the design of new functional nanomaterials. ...

  14. Center for Nanophase Materials Sciences - Newsletter

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    anions where capable of inducing cage formation. In a current user project (for Ken Jacobson, NIH), we are preparing polyamido(amine) (PAMAM) dendrimers for investigation as...

  15. Resources | Center for Energy Efficient Materials

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Resources Simulation Techniques 1. MATLAB program for calculating drift mobilities of III-V compound semiconductors using the Rode iterative method. Click here to download Online...

  16. Center for Nanophase Materials Sciences (CNMS)

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    "Controllable Complex Oxide Heterointerface" - Zhiqun Lin, Georgia Institute of Technology "Crafting Functional Nanocrystals by Capitalizing on Nonlinear Block Copolymers...

  17. Iowa lab gets critical materials research center

    Office of Energy Efficiency and Renewable Energy (EERE)

    The DOE hub is set to be the largest R&D effort toward alleviating the global shortage of rare earth metals.

  18. Center for Nanophase Materials Sciences (CNMS) - Instructions...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    forms. Use the links below to download each of the necessary forms. CNMS Proposal Form (LaTex version) - You must use the latest version from one of these links Neutron Scattering...

  19. Past Events | Center for Energy Efficient Materials

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Seminar Series John Papanikolas: Visualizing Charge Carrier Motion in Nanowires Using ... Personal Perspectives on Advancing Energy Sustainability Seminar Series Vidvuds ...

  20. Center for Nanophase Materials Sciences - Newsletter

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    solid. Inelastic neutron scattering measurements of Fe1-xCoxSi alloys were combined with quantum mechanics based calculations to show why the alloys exhibit unusual softening as...

  1. 2014 > Publications > Research > The Energy Materials Center...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    HD Abrua, D Muller, and T Hanrath ACS Nano, 8(5), pp 5315-5322, 2014 DOI: 10.1021... TA Arias, HD Abrua, and DA Muller Nano Letters, 14(3), pp 1453-1459, 2014 DOI: ...

  2. Center for Nanophase Materials Sciences (CNMS) - Publications

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    "Technique to automatically measure electron beam diameter and astigmatism," J. Vac. Sci. Tech. B 24, 2956-2959 (2006). Choi, Y. R., P. D. Rack, S. J. Randolph, D. A. Smith, and D....

  3. Center for Nanophase Materials Sciences (CNMS) - Publications

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    ... Zutic, "Semiconductor Spintronics," Acta Physica Slovaca, 57, 565-907 (342 pages) (2007). ... Zutic, I., J. Fabian, and S. C. Erwin, "Bipolar Spintronics: from Spin injection to ...

  4. Center for Nanophase Materials Sciences (CNMS) - Macromolecular...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Polymerization: Extensive expertise in free radical and controlled radical (ATRP, NMP, RAFT) polymerizations. Ring Opening Polymerization: Expertise in the controlled ring-opening...

  5. Publications | Center for Energy Efficient Materials

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    and Stucky, G. D. (2014), HOT CARRIER FILTERING IN ... for Light Extraction Efficiency (LEE) Modeling in Nitride LEDs,Springer Netherlands, III-Nitride Based Light Emitting ...

  6. Center for Nanophase Materials Sciences - Newsletter

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    meet various research needs. The chemical or physical exfoliation of graphite is a straightforward method to produce graphene with least synthesis effort, since it takes advantage...

  7. Center for Nanophase Materials Sciences (CNMS) - Highlights

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    that limit the optimal electronic and optoelectronic properties of semiconductors. "Alloy Engineering of Defect Properties in Semiconductors: Suppression of Deep Levels in...

  8. Center for Nanophase Materials Sciences - Newsletter

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Summer Newsletter 2010 Welcome Sean Smith CNMS Division Director Editor's Note: On August 1, the CNMS was pleased to welcome its new director, Sean Smith, who joined us from the...

  9. Center for Nanophase Materials Sciences - Newsletter

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    solids, and thin films. Non-ambient options include controlled temperature and humidity cells, flow cells, and grazing-incidence SAXS for in-plane characterization of thin...

  10. Center for Nanophase Materials Sciences (CNMS) - News

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Physics, National Academy of Science of Ukraine, Kiev, Ukraine 8 Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, 7500 AE,...

  11. Center for Nanophase Materials Sciences (CNMS) - Publications

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    W. Lu, J. Bernholc, and B. Sumpter, "Electron Transport in Molecular Electronics Systems," J. Phys. Conf. Series 16, 283 (2005). V. V. Osipov, A. G. Petukhov, and V. N....

  12. Center for Nanophase Materials Sciences (CNMS) - Microsocpy,...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    chemical composition in sample environment. 4-circle X-ray diffraction 4-circle plus translation stage, high temperature, in-plane thin film diffraction. Also texture,...

  13. Center for Nanophase Materials Sciences (CNMS)

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Newsletters People Contact Us Upcoming Events and Latest News Call For Proposals - Next Cycle Spring 2016 CNMS User Meeting - August 10-12, 2016 Career Opportunities Recent News:...

  14. Center for Nanophase Materials Sciences (CNMS) - Microsocpy,...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    gas environmental cell holder for conducting in-situ gas reactions at pressures to 1 atm. and temperatures up to 1000C. This new holder complements other specializedin-situ...

  15. Center for Nanophase Materials Sciences (CNMS) - Policies

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    officio seat on the SAC. Proposal Review Committees (PRCs) Evaluation of General User (GU) proposals will be carried out by appropriately constituted Proposal Review Committees....

  16. Home > The Energy Materials Center at Cornell

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Catalyst aging The Muller group helps determine aging mechanisms in fuel cell nanoparticle cata... A recipe for the future Prof. Darrell Schlom and his research group are cooking...

  17. 2015 > Publications > Research > The Energy Materials Center...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Rapid and Efficient Redox Processes within 2D Covalent Organic Framework Thin Films CR DeBlase, K Hernndez-Burgos, KE Silberstein, GG Rodrguez-Calero, RP Bisbey, HD Abrua, ...

  18. 2013 > Publications > Research > The Energy Materials Center...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Sulfur for Lithium-Sulfur Batteries W Zhou, Y ... of battery systems D Gunceler, K Letchworth-Weaver, R Sundararaman, KA Schwarz and TA Arias Modeling and Simulation in ...

  19. Center for Nanophase Materials Sciences (CNMS) - Publications

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Alkemade, P.F.A.; Miro, H.; van Veldhoven, E.; Maas, D. J.; Smith, D. A.; Rack, P. D., ... Jo, J. Y.; Chen, P.; Sichel, R. J.; Baek, S. H.; Smith, R. T.; Balke, N.; Kalinin, S. V.; ...

  20. Center for Nanophase Materials Sciences (CNMS) - Publications

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    may be required to access online publications. L. R. Baylor, W. L. Gardner, X. Yang, R. J. Kasica, M. A. Guillorn, B. Blalock, H. Cui, D. K. Hensley, S. Islam, D. H....

  1. News | Center for Energy Efficient Materials

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Aug 28, 2013 "Morphology-dependent light trapping in thin-film organic solar cells" -- CEEM faculty Jon Schuller's research published in Optics Express. Jun 7, 2013 CEEM Faculty ...

  2. Center for Nanoscale Materials | Argonne National Laboratory

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Publications 2015 Publications 2014 Publications 2013 Publications 2012 Publications 2011 Publications 2010 Publications 2009 Publications 2008 Publications 2007 Publications 2006 Publications Fact Sheets & Other Documents Acknowledgment Statement News & Events RESEARCH HIGHLIGHTS COLLOQUIUM SERIES SEMINAR SERIES Argonne Press Releases Feature Stories In the News Users Meetings Workshops Photos Videos Career Opportunities CNM Intranet CNM on Facebook Career Opportunities CNM Intranet

  3. Center for Nanophase Materials Sciences (CNMS) - Publications

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    ... Reaction with Tin Anodes: Experiment and Theory," ... for High Avidity Microbial Capture," ... Layers of Proton Exchange Membrane Fuel Cells," J. Phys. Chem. ...

  4. Center for Nanophase Materials Sciences (CNMS) - Publications

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Brankovic, S. R.; Strasser, P.; Mavrikakis, M., "Bifunctional Anode Catalysts for Direct Methanol Fuel Cells," Energy Environ. Sci. 5, 8335-8342 (2012). Ryckman, J. D.;...

  5. Instructional Materials | Photosynthetic Antenna Research Center

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Solar Energy Learn about the quality of electromagnetic radiation produced by the sun and ... Kit 5: Making a Dye Sensitized Solar Cell Kit 6A: Efficiency of Solar Cells Kit ...

  6. 2011 > Publications > Research > The Energy Materials Center...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    connected quantum dots H Zhang, B Hu, L Sun, R Hovden, FW Wise, DA Muller, and RD ... Revealing atomic-scale surface segregation, intermixing and internal ordering in fuel cell ...

  7. Center for Nanophase Materials Sciences (CNMS) - Publications

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    N.; Kalinin, S. V.; Rodriguez, B. J., "Probing Charge Screening Dynamics and Electrochemical Processes at the Solid-Liquid Interface with Electrochemical Force Microscopy,"...

  8. Center for Nanophase Materials Sciences (CNMS) - Nanomaterials...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    THEORY INSTITUTE (NTI): THEORY, MODELING & SIMULATION CAPABILITIES NTI Computational Cluster The NTI maintains a 12 teraflop Beowulf cluster in support of the capacity-level...

  9. Travel & Hotels | Center for Energy Efficient Materials

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    time and hassle saved will be more than worth it. UC Santa Barbara is an easy 5 minute cab ride from the Santa Barbara Airport, see taxi information below. For Santa Barbara...

  10. Los Alamos National Laboratory * Est. 1943 The Pulse-Newsletter of the Los Alamos Neutron Science Center and Accelerator Operations and Technology Division

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    1 Los Alamos National Laboratory * Est. 1943 The Pulse-Newsletter of the Los Alamos Neutron Science Center and Accelerator Operations and Technology Division I N S I D E 2 From Alex's Desk 3 lujAn Center reseArCh FeAtureD on Cover oF Langmuir 4 FunCtionAl oxiDes unDer extreme ConDi- tions-quest For new mAteriAls 6 heADs uP! By Diana Del Mauro ADEPS Communications Inside the Lujan Neutron Scattering Center, Victor Fanelli is busy preparing a superconducting magnet. In a series of delicate steps,

  11. Materials Down Select Decisions Made Within DOE's Chemical Hydrogen...

    Energy Saver

    Materials Down Select Decisions Made Within DOE's Chemical Hydrogen Storage Center of Excellence Materials Down Select Decisions Made Within DOE's Chemical Hydrogen Storage Center ...

  12. COMPUTATIONAL SCIENCE CENTER

    SciTech Connect

    DAVENPORT, J.

    2005-11-01

    The Brookhaven Computational Science Center brings together researchers in biology, chemistry, physics, and medicine with applied mathematicians and computer scientists to exploit the remarkable opportunities for scientific discovery which have been enabled by modern computers. These opportunities are especially great in computational biology and nanoscience, but extend throughout science and technology and include, for example, nuclear and high energy physics, astrophysics, materials and chemical science, sustainable energy, environment, and homeland security. To achieve our goals we have established a close alliance with applied mathematicians and computer scientists at Stony Brook and Columbia Universities.

  13. Bisfuel links - Research centers

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Research centers http://bioenergy.asu.edu/" target="_blank">Center for Bioenergy and Photosynthesis

  14. Low-temperature magnetic refrigerator

    DOEpatents

    Barclay, J.A.

    1983-05-26

    The invention relates to magnetic refrigeration and more particularly to low temperature refrigeration between about 4 and about 20 K, with an apparatus and method utilizing a belt of magnetic material passed in and out of a magnetic field with heat exchangers within and outside the field operably disposed to accomplish refrigeration.

  15. Low-temperature magnetic refrigerator

    DOEpatents

    Barclay, John A.

    1985-01-01

    The disclosure is directed to a low temperature 4 to 20 K. refrigeration apparatus and method utilizing a ring of magnetic material moving through a magnetic field. Heat exchange is accomplished in and out of the magnetic field to appropriately utilize the device to execute Carnot and Stirling cycles.

  16. Magnetic switches and circuits

    SciTech Connect

    Nunnally, W.C.

    1982-05-01

    This report outlines the use of saturable inductors as switches in lumped-element, magnetic-pulse compression circuits is discussed and the characteristic use of each is defined. In addition, the geometric constraints and magnetic pulse compression circuits used in short-pulse, low-inductance systems are considered. The scaling of presaturation leakage currents, magnetic energy losses, and switching times with geometrical and material parameters are developed to aid in evaluating magnetic pulse compression systems in a particular application. Finally, a scheme for increasing the couping coefficient in saturable stripline transformers is proposed to enable their use in the short-pulse, high-voltage regime.

  17. Soft X-ray techniques to study mesoscale magnetism

    SciTech Connect

    Kortright, Jeffrey B.

    2003-06-26

    Heterogeneity in magnetization (M) is ubiquitous in modern systems. Even in nominally homogeneous materials, domains or pinning centers typically mediate magnetization reversal. Fundamental lengths determining M structure include the domain wall width and the exchange stiffness length, typically in the 4-400 nm range. Chemical heterogeneity (phase separation, polycrystalline microstructure, lithographic or other patterning, etc.) with length scales from nanometers to microns is often introduced to influence magnetic properties. With 1-2 nm wavelengths {lambda}, soft x-rays in principle can resolve structure down to {lambda}/2, and are well suited to study these mesoscopic length scales [1, 2]. This article highlights recent advances in resonant soft x-ray methods to resolve lateral magnetic structure [3], and discusses some of their relative merits and limitations. Only techniques detecting x-ray photons (rather than photo-electrons) are considered [4], since they are compatible with strong applied fields to probe relatively deeply into samples. The magneto-optical (MO) effects discovered by Faraday and Kerr were observed in the x-ray range over a century later, first at ''hard'' wavelengths in diffraction experiments probing interatomic magnetic structure [5]. In the soft x-ray range, magnetic linear [6] and circular [7] dichroism spectroscopies first developed that average over lateral magnetic structure. These large resonant MO effects enable different approaches to study magnetic structure or heterogeneity that can be categorized as microscopy or scattering [1]. Direct images of magnetic structure result from photo-emission electron microscopes [4, 8] and zone-plate microscopes [9, 10]. Scattering techniques extended into the soft x-ray include familiar specular reflection that laterally averages over structure but can provide depth-resolved information, and diffuse scattering and diffraction that provide direct information about lateral magnetic structure

  18. Magnetic excitations in Kondo liquid: superconductivity and hidden magnetic

    Office of Scientific and Technical Information (OSTI)

    quantum critical fluctuations (Journal Article) | SciTech Connect Magnetic excitations in Kondo liquid: superconductivity and hidden magnetic quantum critical fluctuations Citation Details In-Document Search Title: Magnetic excitations in Kondo liquid: superconductivity and hidden magnetic quantum critical fluctuations We report Knight shift experiments on the superconducting heavy electron material CeCoIn{sub 5} that allow one to track with some precision the behavior of the heavy electron

  19. Cosmic magnetism

    SciTech Connect

    Seymour, P.

    1986-01-01

    This book deals with the cosmic magnetism in a non-mathematical way. It uses Faraday's very powerful and highly pictorial concept of lines of magnetic force and their associated physical properties to explain the structure and behavior of magnetic fields in extraterrestrial objects. Contents include: forces of nature; magnetic field of earth; solar and interplanetary magnetic fields; magnetic fields in the solar system; stars and pulsars; and magnetic fields of the milky way and other galaxies.

  20. Alternative Fuels Data Center

    Alternative Fuels and Advanced Vehicles Data Center

    Incentives Printable Version Share this resource Send a link to Alternative Fuels Data Center to someone by E-mail Share Alternative Fuels Data Center on Facebook Tweet about Alternative Fuels Data Center on Twitter Bookmark Alternative Fuels Data Center on Google Bookmark Alternative Fuels Data Center on Delicious Rank Alternative Fuels Data Center on Digg Find More places to share Alternative Fuels Data Center on AddThis.com... More in this section... Search Federal State Local Examples

  1. Alternative Fuels Data Center

    Alternative Fuels and Advanced Vehicles Data Center

    Summary Tables Printable Version Share this resource Send a link to Alternative Fuels Data Center to someone by E-mail Share Alternative Fuels Data Center on Facebook Tweet about Alternative Fuels Data Center on Twitter Bookmark Alternative Fuels Data Center on Google Bookmark Alternative Fuels Data Center on Delicious Rank Alternative Fuels Data Center on Digg Find More places to share Alternative Fuels Data Center on AddThis.com... More in this section... Search Federal State Local Examples

  2. Alternative Fuels Data Center

    Alternative Fuels and Advanced Vehicles Data Center

    Federal Printable Version Share this resource Send a link to Alternative Fuels Data Center to someone by E-mail Share Alternative Fuels Data Center on Facebook Tweet about Alternative Fuels Data Center on Twitter Bookmark Alternative Fuels Data Center on Google Bookmark Alternative Fuels Data Center on Delicious Rank Alternative Fuels Data Center on Digg Find More places to share Alternative Fuels Data Center on AddThis.com... More in this section... Search Federal State Local Examples Summary

  3. Alternative Fuels Data Center

    Alternative Fuels and Advanced Vehicles Data Center

    Tools Printable Version Share this resource Send a link to Alternative Fuels Data Center to someone by E-mail Share Alternative Fuels Data Center on Facebook Tweet about Alternative Fuels Data Center on Twitter Bookmark Alternative Fuels Data Center on Google Bookmark Alternative Fuels Data Center on Delicious Rank Alternative Fuels Data Center on Digg Find More places to share Alternative Fuels Data Center on AddThis.com... Truckstop Electrification Truck Stop Electrification Locator Locate

  4. Alternative Fuels Data Center

    Alternative Fuels and Advanced Vehicles Data Center

    AFDC Printable Version Share this resource Send a link to Alternative Fuels Data Center to someone by E-mail Share Alternative Fuels Data Center on Facebook Tweet about Alternative Fuels Data Center on Twitter Bookmark Alternative Fuels Data Center on Google Bookmark Alternative Fuels Data Center on Delicious Rank Alternative Fuels Data Center on Digg Find More places to share Alternative Fuels Data Center on AddThis.com... Vehicle and Infrastructure Cash-Flow Evaluation Model VICE 2.0: Vehicle

  5. Alternative Fuels Data Center

    Alternative Fuels and Advanced Vehicles Data Center

    Incentives » Federal Printable Version Share this resource Send a link to Alternative Fuels Data Center to someone by E-mail Share Alternative Fuels Data Center on Facebook Tweet about Alternative Fuels Data Center on Twitter Bookmark Alternative Fuels Data Center on Google Bookmark Alternative Fuels Data Center on Delicious Rank Alternative Fuels Data Center on Digg Find More places to share Alternative Fuels Data Center on AddThis.com... More in this section... Search Federal State Local

  6. Regenerator for Magnetic Refrigerants - Energy Innovation Portal

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Industrial Technologies Industrial Technologies Building Energy Efficiency Building Energy Efficiency Advanced Materials Advanced Materials Find More Like This Return to Search Regenerator for Magnetic Refrigerants Ames Laboratory Contact AMES About This Technology Technology Marketing SummaryIowa State University and Ames Laboratory researchers have developed a new magnetic material that can be used at low temperatures (sub liquid hydrogen) for magnetic refrigerators. Magnetic refrigeration is

  7. materials science | National Nuclear Security Administration

    National Nuclear Security Administration (NNSA)

    materials science NNSA-lab-created new magnets will power renewable technology The Ion Beam Materials Laboratory at NNSA's Los Alamos National Laboratory (LANL) works to ...

  8. Centers | U.S. DOE Office of Science (SC)

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Centers Energy Frontier Research Centers (EFRCs) EFRCs Home Centers EFRC External Websites Research Science Highlights News & Events Publications History Contact BES Home Centers Print Text Size: A A A FeedbackShare Page EFRC Map Centers ordered alphabetically by state and then by institution California Light-Material Interactions in Energy Conversion (LMI) Ralph Nuzzo, California Institute of Technology Center for Nanoscale Controls on Geologic CO2 (NCGC) Donald DePaolo, Lawrence Berkeley

  9. Recycling Magnets from the Factory Floor | The Ames Laboratory

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Energy Innovation Hub led by the Ames Laboratory, recovers valuable rare-earth magnetic material from manufacturing waste and creates useful magnets out of it. Ames Laboratory...

  10. The Mystery of the Missing Materials

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    The Mystery of the Missing Materials Stay alert, Sherlock Holmes. The Center for Inverse Design is "afoot" The Center (CID)-an Office of Science Energy Frontier Research Center-is...

  11. Publications - Center for Plasma in the Laboratory and Astrophysics - UW

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Madison Physics Department Publications CPLA Home - Experiments Madison Symmetric Torus Madsion Dynamo Experiment Rotating Wall Machine Plasma-Couette Experiment Madison Plasma Dynamo Experiment - Theory Groups MHD Turbulence Transport in Fusion Devices Plasma Astrophysics RFP Theory - Multi-Institutional Centers Center for Magnetic Self Organization Center for Theory and Computation Center for Momentum Transport and Flow Organization About CPLA Directory Publications Links CPLA Schedule

  12. Conferences - Publications - Center for Plasma in the Laboratory and

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Astrophysics - UW Madison Physics Department Publications: Conferences CPLA Home - Experiments Madison Symmetric Torus Madsion Dynamo Experiment Rotating Wall Machine Plasma-Couette Experiment Madison Plasma Dynamo Experiment - Theory Groups MHD Turbulence Transport in Fusion Devices Plasma Astrophysics RFP Theory - Multi-Institutional Centers Center for Magnetic Self Organization Center for Theory and Computation Center for Momentum Transport and Flow Organization About CPLA Directory

  13. Material Transfer Agreements

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Material Transfer Agreements Material Transfer Agreements Enables the transfer of tangible consumable research materials between two organizations, when the recipient intends to use the material for research purposes Contact thumbnail of Marcus Lucero Head of Licensing Marcus Lucero Richard P. Feynman Center for Innovation (505) 665-6569 Email Overview The ability to exchange materials freely and without delay is an important part of a healthy scientific laboratory. Los Alamos National

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

    SciTech Connect

    Ni Chunlin; Dang Dongbin; Li Yizhi; Gao Song; Ni Zhaoping; Tian Zhengfang; Meng Qingjin . E-mail: njuchem1024@163.com

    2005-01-15

    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.

  15. Center for Functional Nanomaterials (CFN) | U.S. DOE Office of Science (SC)

    Office of Science (SC)

    Functional Nanomaterials (CFN) Scientific User Facilities (SUF) Division SUF Home About User Facilities X-Ray Light Sources Neutron Scattering Facilities Nanoscale Science Research Centers (NSRCs) Center for Functional Nanomaterials (CFN) Center for Integrated Nanotechnologies (CINT) Center for Nanophase Materials Sciences (CNMS) Center for Nanoscale Materials (CNM) The Molecular Foundry (TMF) Projects Accelerator & Detector Research Science Highlights Principal Investigators' Meetings BES

  16. Center for Integrated Nanotechnologies (CINT) | U.S. DOE Office of Science

    Office of Science (SC)

    (SC) Integrated Nanotechnologies (CINT) Scientific User Facilities (SUF) Division SUF Home About User Facilities X-Ray Light Sources Neutron Scattering Facilities Nanoscale Science Research Centers (NSRCs) Center for Functional Nanomaterials (CFN) Center for Integrated Nanotechnologies (CINT) Center for Nanophase Materials Sciences (CNMS) Center for Nanoscale Materials (CNM) The Molecular Foundry (TMF) Projects Accelerator & Detector Research Science Highlights Principal Investigators'

  17. NREL: Education Center - Programs

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Education Center Printable Version Programs NREL's Education Center in Golden, Colorado, offers a variety of program topics and experiences for students and adult groups addressing...

  18. NREL: Education Center - Events

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Education Center Printable Version Events Unless otherwise notified, events listed here will be held at the NREL Education Center, 15013 Denver West Parkway, Golden, CO. The...

  19. Electron Microscopy Center

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Electron Microscopy Center Argonne Home > EMC > EMC Home Electron Microscopy Center Web Site has moved This page has moved to http:www.anl.govcnmgroupelectron-microscopy-cente...

  20. Household magnets

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Household magnets Chances are very good that you have experimented with magnets. People have been fascinated with magnetism for thousands of years. As familiar to us as they may be, magnets still have some surprises for us. Here is a small collection of some of our favorite magnet experiments. What happens when we break a magnet in half? Radio Shack sells cheap ceramic magnets in several shapes. Get a ring shaped magnet and break it with pliers or a tap with a hammer. Try to put it back

  1. NREL: Photovoltaics Research - Materials Applications and Performance...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    about the scientists specializing in each area of PV research: National Center for Photovoltaics research staff Materials Applications and Performance research staff Materials...

  2. Fast superconducting magnetic field switch

    DOEpatents

    Goren, Y.; Mahale, N.K.

    1996-08-06

    The superconducting magnetic switch or fast kicker magnet is employed with electron stream or a bunch of electrons to rapidly change the direction of flow of the electron stream or bunch of electrons. The apparatus employs a beam tube which is coated with a film of superconducting material. The tube is cooled to a temperature below the superconducting transition temperature and is subjected to a constant magnetic field which is produced by an external dc magnet. The magnetic field produced by the dc magnet is less than the critical field for the superconducting material, thus, creating a Meissner Effect condition. A controllable fast electromagnet is used to provide a magnetic field which supplements that of the dc magnet so that when the fast magnet is energized the combined magnetic field is now greater that the critical field and the superconducting material returns to its normal state allowing the magnetic field to penetrate the tube. This produces an internal field which effects the direction of motion and of the electron stream or electron bunch. The switch can also operate as a switching mechanism for charged particles. 6 figs.

  3. Fast superconducting magnetic field switch

    DOEpatents

    Goren, Yehuda; Mahale, Narayan K.

    1996-01-01

    The superconducting magnetic switch or fast kicker magnet is employed with electron stream or a bunch of electrons to rapidly change the direction of flow of the electron stream or bunch of electrons. The apparatus employs a beam tube which is coated with a film of superconducting material. The tube is cooled to a temperature below the superconducting transition temperature and is subjected to a constant magnetic field which is produced by an external dc magnet. The magnetic field produced by the dc magnet is less than the critical field for the superconducting material, thus, creating a Meissner Effect condition. A controllable fast electromagnet is used to provide a magnetic field which supplements that of the dc magnet so that when the fast magnet is energized the combined magnetic field is now greater that the critical field and the superconducting material returns to its normal state allowing the magnetic field to penetrate the tube. This produces an internal field which effects the direction of motion and of the electron stream or electron bunch. The switch can also operate as a switching mechanism for charged particles.

  4. MAGNETIC DENSITOMETER

    DOEpatents

    McCann, J.A.; Jones, R.H.

    1961-08-15

    A magnetic densitometer for locating defects and metallic inclusions in materials is described. The apparatus consists of two primary coils connected in series opposition and adapted te be placed in inductive relation to the material under test, a source of constant frequency alternating current coupled across the primary coil combination, a pick-up coil disposed in symmetrical inductive relationship with said primary coils, a phase-shifter coupled to the output of the energizing source. The output of the phase-shifter is coupled in series with the pick-up coil. An amplifier is provided selective to the third harmonic of the energizing source frequency. The series combination of the pick-up coil and the phase-shifter output are connected across the input of the amplifier, and an amplitude comparitor is coupled to the output of the amplifier and the energizing source for comparing the instantaneous amplitude of the amplifier output and the instantaneous output of the energizing source and producing an output proportional to the difference in amplitude. A recorder is coupled to the output of the amplitude comparison means to give an indication of the amplitude difference, thereby providing a permanent presentation of the character of the changes in characteristics exhibited by the material under test. (AEC)

  5. Analysis of Nitrogen Incorporation in Group III-Nitride-Arsenide Materials Using a Magnetic Sector Secondary-Ion Mass Spectrometry (SIMS) Instrument: Preprint

    SciTech Connect

    Reedy, R. C.; Geisz, J. F.; Kurtz, S. R.; Adams, R. O.; Perkins, C. L.

    2001-10-01

    Presented at the 2001 NCPV Program Review Meeting: Group III-nitride-arsenide materials were studied by SIMS, XRD, and Profiler to determine small amounts of nitrogen that can lower the alloys bandgap significantly.

  6. Materials Discovery | Photovoltaic Research | NREL

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Discovery The National Center for Photovoltaics (NCPV) research in materials discovery serves as a foundation for technological progress in renewable energies. Our experimental ...

  7. Vehicle Technologies Office: 2009 Propulsion Materials R&D Annual...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    PDF icon 2009propulsionmaterials.pdf More Documents & Publications Magnetic Material for PM Motors Permanent Magnet Development for Automotive Traction Motors Vehicle ...

  8. Multiparameter magnetic inspection system with magnetic field control and plural magnetic transducers

    DOEpatents

    Jiles, David C. (Ames, IA)

    1991-04-16

    A multiparameter magnetic inspection system for providing an efficient and economical way to derive a plurality of independent measurements regarding magnetic properties of the magnetic material under investigation. The plurality of transducers for a plurality of different types of measurements operatively connected to the specimen. The transducers are in turn connected to analytical circuits for converting transducer signals to meaningful measurement signals of the magnetic properties of the specimen. The measurement signals are processed and can be simultaneously communicated to a control component. The measurement signals can also be selectively plotted against one another. The control component operates the functioning of the analytical circuits and operates and controls components to impose magnetic fields of desired characteristics upon the specimen. The system therefore allows contemporaneous or simultaneous derivation of the plurality of different independent magnetic properties of the material which can then be processed to derive characteristics of the material.

  9. Multiparameter magnetic inspection system with magnetic field control and plural magnetic transducers

    DOEpatents

    Jiles, D.C.

    1991-04-16

    A multiparameter magnetic inspection system is disclosed for providing an efficient and economical way to derive a plurality of independent measurements regarding magnetic properties of the magnetic material under investigation. The plurality of transducers for a plurality of different types of measurements operatively connected to the specimen. The transducers are in turn connected to analytical circuits for converting transducer signals to meaningful measurement signals of the magnetic properties of the specimen. The measurement signals are processed and can be simultaneously communicated to a control component. The measurement signals can also be selectively plotted against one another. The control component operates the functioning of the analytical circuits and operates and controls components to impose magnetic fields of desired characteristics upon the specimen. The system therefore allows contemporaneous or simultaneous derivation of the plurality of different independent magnetic properties of the material which can then be processed to derive characteristics of the material. 1 figure.

  10. CMI in the News | Critical Materials Institute

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    in the News The Economist: Magnetic moments: 3D printers promise better, cheaper and more powerful magnets Plastics Today: 3D-printed permanent magnets employing polyamide binder outperform conventional versions, conserve rare materials tct mag: Research shows 3D printed magnets outperform traditionally made versions nextbigfuture: 3D-printed permanent magnets outperform conventional versions and enables batteries with complex shapes EurekAlert!: 3-D-printed permanent magnets outperform

  11. Hole in one: Technicians smoothly install the center stack in...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    construction of the center stack, which houses the bundle of magnetic coils that form ... The clearances were tiny: The bottom of the casing passed just inches over the shielding ...

  12. Permanent-magnet multipole with adjustable strength

    DOEpatents

    Halbach, K.

    1982-09-20

    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.

  13. Permanent magnet multipole with adjustable strength

    DOEpatents

    Halbach, Klaus

    1985-01-01

    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.

  14. Direct Imaging of Asymmetric Magnetization Reversal

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    material like iron is itself a tiny magnet represented by a magnetic moment. If the atomic moments are pointing in random directions, they cancel each other out. So, to bring...

  15. Reversing the Circulation of Magnetic Vortices

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    very stable and form readily in soft magnetic materials of the sort useful for magnetic random-access memory (MRAM) devices. Interestingly, the formation of such vortices was at...

  16. Theory Center | Jefferson Lab

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Theory Center The Center for Theoretical and Computational Physics pursues a broad program of research in support of the physics being studied at Jefferson Lab and related facilities around the world. The Theory Center provides opportunities for interested scientists and students to visit the lab and work closely with theoretical and experimental colleagues.The center also advises the lab on the scientific merit of its program and its plans for future development. The center provides scientific

  17. RSF Data Center Tour

    SciTech Connect

    Powers, Chuck

    2011-01-01

    The Data Center in the Research Support Facility on the campus of the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) marks a significant accomplishment in its ultra-efficiency. Data centers by nature are very energy intensive. The RSF Data Center was designed to use 80% less energy than NREL's old data center, which had been in use for the last 30 years. This tour takes you through the data center highlighting its energy saving techniques.

  18. tracc-comuting-center-html

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Transportation Research and Analysis Computing Center

  19. High magnetic field ohmically decoupled non-contact technology

    DOEpatents

    Wilgen, John [Oak Ridge, TN; Kisner, Roger [Knoxville, TN; Ludtka, Gerard [Oak Ridge, TN; Ludtka, Gail [Oak Ridge, TN; Jaramillo, Roger [Knoxville, TN

    2009-05-19

    Methods and apparatus are described for high magnetic field ohmically decoupled non-contact treatment of conductive materials in a high magnetic field. A method includes applying a high magnetic field to at least a portion of a conductive material; and applying an inductive magnetic field to at least a fraction of the conductive material to induce a surface current within the fraction of the conductive material, the surface current generating a substantially bi-directional force that defines a vibration. The high magnetic field and the inductive magnetic field are substantially confocal, the fraction of the conductive material is located within the portion of the conductive material and ohmic heating from the surface current is ohmically decoupled from the vibration. An apparatus includes a high magnetic field coil defining an applied high magnetic field; an inductive magnetic field coil coupled to the high magnetic field coil, the inductive magnetic field coil defining an applied inductive magnetic field; and a processing zone located within both the applied high magnetic field and the applied inductive magnetic field. The high magnetic field and the inductive magnetic field are substantially confocal, and ohmic heating of a conductive material located in the processing zone is ohmically decoupled from a vibration of the conductive material.

  20. About | Center for Gas Separations

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    About Novel Adsorbent Synthesis A major thrust within the CGS is to design new adsorbents tuned to efficiently carry out a given gas separation. Research in the Center focuses heavily on metal-organic framework (MOF) adsorbents, which are a relatively new class of porous materials composed of metal ions connected by organic linkers in three dimensions. An essentially infinite library of possible metal and ligand combinations and their porous nature has rendered MOFs promising for specifically

  1. Comparison of ferrite materials for pulse applications

    SciTech Connect

    Dinkel, J.A.; Jensen, C.C.

    1993-06-01

    Materials are the limiting factor in many pulse power projects. The magnetic materials available from several manufacturers were experimentally compared for their usefulness in high speed magnetic field applications. This particular application is a high speed kicker magnet for manipulation of a charged particle beam.

  2. Method for obtaining large levitation pressure in superconducting magnetic bearings

    DOEpatents

    Hull, John R. (Hinsdale, IL)

    1996-01-01

    A method and apparatus 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.

  3. Method for obtaining large levitation pressure in superconducting magnetic bearings

    DOEpatents

    Hull, John R. (Hinsdale, IL)

    1997-01-01

    A method and apparatus 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. Method for obtaining large levitation pressure in superconducting magnetic bearings

    DOEpatents

    Hull, J.R.

    1997-08-05

    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.

  5. Method for obtaining large levitation pressure in superconducting magnetic bearings

    DOEpatents

    Hull, J.R.

    1996-10-08

    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.

  6. How to Apply - Combustion Energy Frontier Research Center

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    of the proposed research project Heshe should also arrange to have the following material directly sent to the Center: Two recommendation letters A letter of endorsement...

  7. ODU establishes a Center for Accelerator Science | Jefferson...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    atom-smashing experiments, as well as for materials processing, medical imaging and radiation therapies against cancer. The center will receive personnel and funding support from...

  8. Sergey Maximoff | Center for Gas SeparationsRelevant to Clean...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    TX EFRC research: Dr. Maximoff's interest within this EFRC centers on theory of adsorption, desorption, and chemical conversion of small molecules within porous materials. He...

  9. Research Highlights - Joint Center for Energy Storage Research

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    the possibility of future optimization of functional K-doping in carbon cathode materials. ... Strategy of the Joint Center for Energy Storage Research to Influence Laboratory Safety ...

  10. Abramovo Counterterrorism Training Center

    SciTech Connect

    Hayes, Christopher M; Ross, Larry; Lingenfelter, Forrest E; Sokolnikov, Pavel I; Kaldenbach, Karen Yvonne; Estigneev, Yuri; Murievav, Andrey

    2011-01-01

    The U.S. government has been assisting the Russian Federation (RF) Ministry of Defense (MOD) for many years with nuclear weapons transportation security (NWTS) through the provision of specialized guard escort railcars and cargo railcars with integrated physical security and communication systems, armored transport vehicles, and armored escort vehicles. As a natural continuation of the NWTS program, a partnership has been formed to construct a training center that will provide counterterrorism training to personnel in all branches of the RF MOD. The Abramovo Counterterrorism Training Center (ACTC) is a multinational, multiagency project with funding from Canada, RF and the U.S. Departments of Defense and Energy. ACTC will be a facility where MOD personnel can conduct basic through advanced training in various security measures to protect Category IA material against the threat of terrorist attack. The training will enhance defense-in-depth principles by integrating MOD guard force personnel into the overall physical protection systems and improving their overall response time and neutralization capabilities. The ACTC project includes infrastructure improvements, renovation of existing buildings, construction of new buildings, construction of new training facilities, and provision of training and other equipment. Classroom training will be conducted in a renovated training building. Basic and intermediate training will be conducted on three different security training areas where various obstacles and static training devices will be constructed. The central element of ACTC, where advanced training will be held, is the 'autodrome,' a 3 km road along which various terrorist events can be staged to challenge MOD personnel in realistic and dynamic nuclear weapons transportation scenarios. This paper will address the ACTC project elements and the vision for training development and integrating this training into actual nuclear weapons transportation operations.

  11. MAGNETIC NEUTRON SCATTERING

    SciTech Connect

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

    2004-07-30

    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

  12. UAIEE and Industrial Assessment Centers

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    55-62011| Industrial Assessment Centers * Started in 1976 * Currently 26 Centers across the US * Almost...

  13. Data Center Energy Efficiency

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Center Energy Efficiency In 2014, data centers in the U.S. con- sumed an estimated 70 billion kWh, 1.8% of total U.S. electricity consump- tion. 1 Thus, it is no surprise that both ...

  14. Dynamic Control of Spin Sates in Interacting Magnetic Elements...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Advanced Materials Advanced Materials Find More Like This Return to Search Dynamic Control of Spin Sates in Interacting Magnetic Elements DOE Grant Recipients Argonne National...

  15. ASU EFRC - Center researchers

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Center researchers Chad Simmons Academic Professional Gerdenis Kodis Research Assistant Professor Raimund Fromme Faculty Research Associate Yuichi Terazono Faculty Research...

  16. Green Jobs Training Center

    Energy.gov [DOE]

    Provides an overview of the training available through the Green Jobs Training Center including certification courses and the apprenticeship program.

  17. Data center cooling method

    DOEpatents

    Chainer, Timothy J.; Dang, Hien P.; Parida, Pritish R.; Schultz, Mark D.; Sharma, Arun

    2015-08-11

    A method aspect for removing heat from a data center may use liquid coolant cooled without vapor compression refrigeration on a liquid cooled information technology equipment rack. The method may also include regulating liquid coolant flow to the data center through a range of liquid coolant flow values with a controller-apparatus based upon information technology equipment temperature threshold of the data center.

  18. Nuclear Reaction Data Centers

    SciTech Connect

    McLane, V.; Nordborg, C.; Lemmel, H.D.; Manokhin, V.N.

    1988-01-01

    The cooperating Nuclear Reaction Data Centers are involved in the compilation and exchange of nuclear reaction data for incident neutrons, charged particles and photons. Individual centers may also have services in other areas, e.g., evaluated data, nuclear structure and decay data, reactor physics, nuclear safety; some of this information may also be exchanged between interested centers. 20 refs., 1 tab.

  19. Superconducting magnetic coil

    DOEpatents

    Aized, D.; Schwall, R.E.

    1999-06-22

    A superconducting magnetic coil includes a plurality of sections positioned axially along the longitudinal axis of the coil, each section being formed of an anisotropic high temperature superconductor material wound about a longitudinal axis of the coil and having an associated critical current value that is dependent on the orientation of the magnetic field of the coil. The cross section of the superconductor, or the type of superconductor material, at sections along the axial and radial axes of the coil are changed to provide an increased critical current at those regions where the magnetic field is oriented more perpendicularly to the conductor plane, to thereby increase the critical current at these regions and to maintain an overall higher critical current of the coil. 15 figs.

  20. Superconducting magnetic coil

    DOEpatents

    Aized, Dawood; Schwall, Robert E.

    1999-06-22

    A superconducting magnetic coil includes a plurality of sections positioned axially along the longitudinal axis of the coil, each section being formed of an anisotropic high temperature superconductor material wound about a longitudinal axis of the coil and having an associated critical current value that is dependent on the orientation of the magnetic field of the coil. The cross section of the superconductor, or the type of superconductor material, at sections along the axial and radial axes of the coil are changed to provide an increased critical current at those regions where the magnetic field is oriented more perpendicularly to the conductor plane, to thereby increase the critical current at these regions and to maintain an overall higher critical current of the coil.