New High-T_c Half-Heusler Ferromagnets NiMnZ (Z=Si, P, Ge, As)(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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Based on the first principle calculation, we propose a new class of high-T_c half-heusler ferromagnets NiMnZ (Z=Si, P, Ge, As). The structural and magnetic properties are investigated through the calculation of the electronic structure, phase stability, equilibrium lattice constant, magnetic exchange interaction J_<ij> and Curie temperature T_c. It is found that all alloys show half-metallicity and ferro-magnetism at temperatures much higher than room temperature in a wide range of lattice expansion (compression). At the equilibrium lattice constant, T_c of 715, 840, 875, and 1050K are predicted by Monte Carlo simulation for NiMnP, NiMnAs, NiMnGe, and NiMnSi, respectively. Following these results, these alloys are strongly expected to be promising candidates for spintronic applications.
- 社団法人日本物理学会の論文
- 2008-01-15
著者
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SATO Kazunori
The Institute of Scientific and Industrial Research (ISIR), Osaka University
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DINH Van
The Institute of Scientific and Industrial Research, Osaka University
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Dinh Van
The Institute Of Scientific And Industrial Research Osaka University
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YOSHIDA(KATAYAMA) Hiroshi
The Institute of Scientific and Industrial Research, Osaka University
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Yoshida(katayama) Hiroshi
The Institute Of Scientific And Industrial Research Osaka University
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Katayama-yoshida Hiroshi
The Institute Of Scientific And Industrial Research (isir) Osaka University
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