Hirosi Katayama-Yoshida

Osaka University, Ibaraki, Osaka-fu, Japan

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Publications (1)0 Total impact

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    Van An Dinh, Kazunori Sato, Hirosi Katayama-Yoshida
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    ABSTRACT: We present a first principle study of new class of high-$T_c$ half-heusler ferromagnets NiCrZ (Z = Si, P, Ge, As, Te). The structure and magnetic properties are investigated through the calculation of the electronic structure, equilibrium lattice constant, magnetic exchange interaction $J_{ij}$ and Curie temperature $T_c$. The role of $sp$-elements and the influence of lattice expansion/compression are also studied. In alloys having 20 valence electrons, a pseudo-gap of the majority band can be formed at Fermi level. Otherwise, the half-metallicity and ferromagnetism at temperatures much higher than room temperature are found to be stable in a wide range of lattice expansion. Based on these results, NiCrZ can be expected to be promising materials for spintronics.
    01/2008;

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Institutions

  • 2008
    • Osaka University
      • The Institute of Scientific and Industrial Research (ISIR)
      Ibaraki, Osaka-fu, Japan