1991 Fiscal Year Final Research Report Summary
Role of Spin-Orbit Interaction in Magnetic Materials
| Project/Area Number |
02640262
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
固体物性
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| Research Institution | Kagoshima University |
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Principal Investigator |
ISHIDA Shoji Kagoshima University, Faculty of Science, Professor, 理学部, 教授 (10041237)
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| Co-Investigator(Kenkyū-buntansha) |
FUJII Shinpei Kagoshima University, Faculty of Science, Assistant, 理学部, 助手 (90189994)
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| Project Period (FY) |
1990 – 1991
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| Keywords | Electronic Structure / Spin Arrangement / Magnetic Anisotropy / Spin-Orbit Interaction / Magnetic Structure |
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| Research Abstract |
A great number of electronic structures have been calculated for materials with a simple magnetic structure such as ferromagnetic or collinear antiferromagnetic structure. However, the electronic structures for complicated magnetic structures have not been calculated except for some cases. Then, the calculations for complicated magnetic structures were planned by making a new computer program where the spin-orbit interaction is considered in hamiltonian and magnetic moments can point to arbitrary directions. Using this program, we carried out following calculations.
1. We calculated magnetic anisotropy energies for Fe, Co and Ni, which is appropriate to evaluate the spin-orbit interaction(sl). It was found that when for a wave vector k, the degenerate energy levels in the case of sl=O, split near Fermi level in the case of sl=O, the magnetic easy axis appears in the direction of the wave vector k.
2. The compounds Mn_3MC (C=In, Sn), Mn_4N, MnHg and MnZn have noncollinear spin arrangements. The electronic structures arid total energies were also calculated for the other spin arrangements except for the observed magnetic state. Comparing the total energies of these magnetic, states, we found that the observed magnetic state is most stable and the characteristics of the electronic structure was made clear for the complicated magnetic states.
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Research Products
(8 results)
