Magnetic Properties of Half-Metallic f-Electron Systems
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概要
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A microscopic model is proposed to describe magnetic properties of half-metallic f-electron systems. We explicitly take into account the energy gap in the conduction band and the intra-atomic exchange interaction between localized f-electrons and conduction electrons. Based on the model Hamiltonian, the temperature dependence of the magnetic properties are studied assuming the ferromagnetic ground state. The relative stability of ferromagnetic state against antiferromagnetic state is also discussed by perturbation expansion in terms of the hybridization between the conduction and the localized f-electron states. Some implications are given for UNiSn, which shows the transition from paramagnetic semiconductor to antiferromagnetic metal by lowering temperature.
- 社団法人日本物理学会の論文
- 1994-05-15
著者
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SAKAI Toru
Faculty of Science, Himeji Institute of Technology
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TAKAHASHI Yoshinori
Faculty of Science,Himeji institute of Technology
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Isoda Makoto
Department Of Materials Science Faculty Of Science Hiroshima University
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Isoda Makoto
Department Of Physics Fukuyama University
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Sakai Toru
Faculty Of Science Himeji Institute Of Technology
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Takahashi Yoshinori
Faculty Of Science Himeji Institute Of Technology
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Isoda Makoto
Department of Physics, Fukuyama University
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Takahashi Yoshinori
Faculty of Science, Himeji Institute of Technology
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