Electronic and Magnetic Properties of X_2Mn_<1-x>V_xSi (X=Fe and Co)
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概要
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We have performed energy-band calculations of X_2Mn_<1-x>V_xSi (X=Fe and Co) at x=0, 0.25, 0.5, 0.75, 1.0. In ferromagnetic ordering, we obtain excellent agreement between calculated and experimental data for the magnetic moment per formula unit and the lattice constant, at each Mn content. We have obtained the result that state densities in Fe_2Mn_<1-x>V_xSi have a large peak at the Fermi level, while they do not in Co_2 Mn_<1-x>V_xSi. We have also estimated Heisenberg exchange constants from total energy differences between ferromagnetic and antiferromagnetic orderings. The Curie temperature roughly calculated from the exchange constants increases from x=0 to x=0.5 and then decreases rapidly in Fe_2Mn_<1-x>V_xSi, though it monotonically decreases from x=0 to x=0.75 in Co_2 Mn_<1-x>V_xSi. The behavior of calculated Curie temperatures in Fe_2Mn_<1-x>V_xSi is consistent with the observed one.
- 社団法人日本物理学会の論文
- 1994-05-15
著者
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FUJII Shinpei
Department of Physics, Faculty of Science, Kagoshima University
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ISHIDA Shoji
Department of Physics, Faculty of Science, Kagoshima University
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ASANO Setsuro
Institute of Physics, College of Arts and Sciences, University of Tokyo
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Ishida Shoji
Department Of Physics Faculty Of Science Kagoshima University
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Fujii Shinpei
Department Of Physics Faculty Of Science Kagoshima University
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Asano Setsuro
Institute For Solid State Physics The University Of Tokyo
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Ishida Shuichi
Division Of Cardiovascular Medicine Department Of Internal Medicine Ohmori Hospital Toho University
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Fujii S
Department Of Physics Faculty Of Science Kagoshima University
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