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  1. No Access

    Article

    Formation of Ferromagnetic FePt Nanoparticles by Ion Implantation

    Oriented ferromagnetic FePt nanoparticles with the face-centered tetragonal L10 structure were produced in Al2O3 single crystal hosts by ion implantation and annealing. Both the orientation and particle-size of t...

    C. W. White, S. P. Withrow, J. D. Budai, L. A. Boatner… in MRS Online Proceedings Library (2011)

  2. No Access

    Article

    Controlling the Microstructure and Magnetic Properties of Ferromagnetic Nanocrystals Produced by Ion Implantation

    Ion implantation coupled with annealing is a versatile and flexible approach to creating ferromagnetic near-surface nanocomposites that represent a wide range of particle/host combinations. We have used ion im...

    K. S. Beaty, A. Meldrum, J. P. Franck, K. Sorge… in MRS Online Proceedings Library (2011)

  3. No Access

    Article

    Microstructure and magnetic properties of electrodeposited cobalt films

    Cobalt films were electrodeposited onto both iron and copper substrates from an aqueous solution containing a mixture of cobalt sulfate, boric acid, sodium citrate, and vanadyl sulfate. The structural, interme...

    M. S. Bhuiyan, B. J. Taylor, M. Paranthaman, J. R. Thompson… in Journal of Materials Science (2008)

  4. No Access

    Article

    Magnetic alloys in nanoscale biomaterials

    Fe−Co composition gradient and Fe−Pt multilayer alloy films were tested as catalysts for groving vertically aligned carbon nanofibers (VACNFs) by plasma-enhanced chemical vapor deposition (PECVD). The Fe−Co fi...

    T. Leventouri, A. V. Melechko, K. D. Sorge… in Metallurgical and Materials Transactions A (2006)

  5. No Access

    Article

    When Does a Crystal Conduct Heat Like a Glass?

    Semiconducting crystalline materials that are poor conductors of heat are important as thermoelectric materials and for technological applications involving thermal management. In the present article neutron s...

    B. C. Sales, B. C. Chakoumakos, V. Keppens, R. **… in MRS Online Proceedings Library (2002)

  6. No Access

    Article

    Heavy-Ion Damage to Magnesium Diboride Films: Electrical Transport-Current Characterization

    The use of magnesium diboride in superconducting magnets, transmission lines, or other large-scale applications depends on the transport-current characteristics of this material in magnetic field, and how they...

    H. R. Kerchner, C. Cantoni, M. Paranthaman… in MRS Online Proceedings Library (2002)

  7. No Access

    Article

    Superconducting Properties of High-Jc MgB2 Coatings

    We report the fabrication and superconducting properties of ~0.5 μm thick, fine-grained polycrystalline coatings of MgB2 on single-crystal substrate surfaces. The films exhibit large critical current densities, i...

    D. K. Christen, C. Cantoni, J. R. Thompson… in MRS Online Proceedings Library (2002)

  8. No Access

    Chapter

    On The Influence of a Non-Local Electrodynamics in the Irreversible Magnetization of Non-Magnetic Borocarbides

    We present an overview of the temperature, field and angular dependence of the irreversible magnetization of non-magnetic borocarbides (Y;Lu)Ni2B2C. We show that nonlocal electrodynamics influences pinning via th...

    A.V. Silhanek, L. Civale, J. R. Thompson, P. C. Canfield… in New Trends in Superconductivity (2002)

  9. No Access

    Article

    Slater Transition in the Pyrochlore Cd2Os2O7

    Cd2Os2O7 crystallizes in the pyrochlore structure and undergoes a metal-insulator transition (MIT) near 226 K. Here we present resistivity, heat capacity, and magnetization results on Cd2Os2O7. Both single crysta...

    D. Mandrus, J. R. Thompson, L. M. Woods in MRS Online Proceedings Library (2001)

  10. No Access

    Article

    The Formation of High-Coercivity, Oriented, Nanophase Cobalt Precipitates in Al2O3 Single Crystals by Ion Implantation

    Ion-implantation and thermal-processing methods have been used to form nanophase magnetic precipitates of metallic cobalt that are embedded in the near-surface region of single crystals of Al2O3. The Co precipita...

    S. Honda, F. A. Modine, T. E. Haynes, A. Meldrum… in MRS Online Proceedings Library (1999)

  11. No Access

    Article

    Epitaxial Film Growth of Tl0.78Bi0.22Sr1.6Ba0.4Ca2Cu3O9 on Rolling Assisted Biaxially Textured Nickel Substrates with YSZ And CeO2 Buffer Layers

    Epitaxial film growth of Tl0.78Bi0.22Sr1.6Ba0.4Ca2Cu3O9 ((Tl,Bi)-1223) on rolling assisted biaxially textured substrates with YSZ and CeO2 buffer layers (RABiTS) has been successfully demonstrated by laser ablati...

    Z. F. Ren, J. Y. Lao, L. P. Guo, J. H. Wang, J. D. Budai… in Journal of Superconductivity (1998)

  12. No Access

    Article

    Filled Skutterudite Antimonides: Validation of the Electron-Crystal Phonon-Glass Approach to New Thermoelectric Materials

    After a brief review of the transport and thermoelectric properties of filled skutterudite antimonides, we present resonant ultrasound, specific heat, and inelastic neutron scattering results that establish th...

    D. Mandrus, B. C. Sales, V. Keppens, B. C. Chakoumakos… in MRS Online Proceedings Library (1997)

  13. No Access

    Article

    Ferromagnetic Nanocomposite Films from Thermally Labile Nitride Precursors

    A series of nanocomposite films containing nickel or cobalt nitride dispersed in a ceramic matrix of aluminum nitride, boron nitride or silicon nitride, were prepared by reactive sputtering of selected alloys ...

    L. Maya, M. Paranthaman, J. R. Thompson, T. Thundat… in MRS Online Proceedings Library (1996)

  14. No Access

    Article

    Formation and properties of artificially-layered SrCuO2/BaCuO2 superconducting superlattices

    Pulsed-laser deposition is used to synthesize artificially-layered high-temperature superconductors. Using the constraint of epitaxy to stabilize SrCuO2/BaCuO2 superlattices in the infinite layer structure, novel...

    D. P. Norton, B. C. Chakoumakos, J. D. Budai… in Journal of Superconductivity (1995)

  15. No Access

    Article

    What Can we Learn from Magnetization Experiments on HIGH-TC Superconductors? an Overview

    Magnetization studies provide a facile and convenient means for investigating high temperature superconductors. This work provides an overview and some specific examples of the types of information attainable ...

    J. R. Thompson in MRS Online Proceedings Library (1992)

  16. No Access

    Chapter

    Magnetization Studies of Irradiation-Modified Single Crystal Y1Ba2Cu3O7 Superconductors: Flux Creep and Annealing Effects

    Using ion irradiation techniques to create defects with point-like and line-like geometries, the pinning of vortices in single crystals of Y1Ba2Cu3O7 superconductor was increased greatly, as shown by magnetic stu...

    J. R. Thompson, Yang Ren Sun, D. K. Christen… in Physics and Materials Science of High Temp… (1992)

  17. No Access

    Article

    Excimer Laser Irradiation of Metallic Films on Ceramic Substrates

    Copper films sputter deposited on mechanically polished (optical finish) and on annealed substrates were laser-irradiated at various energy densities. The effect of the substrate condition on both the evaporat...

    M. J. Godbole, A. J. Pedraza, D. H. Lowndes… in MRS Online Proceedings Library (1991)

  18. No Access

    Chapter

    Static and Time Dependent Magnetization Studies of Y1Ba2Cu3Oz Thin Films

    Thin films of Y1Ba2Cu3Oz (YBCO) were deposited by electron-beam coevaporation of Y, Cu, and BaF2 onto single-crystal substrates of SrTiO3 and KTaO3. Various oxygen annealing protocols produced different epitaxial...

    S. T. Sekula, R. Feenstra, J. R. Thompson… in Advances in Cryogenic Engineering Material… (1990)

  19. No Access

    Article

    Electrical Transport Dissipation Effects in Epitaxial Y1ba2cu3o7.X Thin Films

    The electrical transport properties of a series of Y1Ba2Cu307.x thin films deposited onto single crystal substrates by thermal coevaporation and laser ablation were investigated. For fully epitaxial, c-oriented f...

    D. K. Christen, C. E. Klabunde, R. Feenstra… in MRS Online Proceedings Library (1989)

  20. Article

    Magnetic Penetration Depth and Intragrain Critical Current Density in Grain-Aligned Tl2Ca2Ba2Cu3O10 Superconductor

    Magnetic studies were performed on the high temperature superconductor Tl2Ca2Ba2Cu3O10 (Tc = 123 K) in the form of a grain aligned composite. Investigations with the magnetic field applied parallel and perpendicu...

    J. R. Thompson, D. K. Christen, H. A. Deeds, Y. C. Kim… in MRS Online Proceedings Library (1989)

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