Surface Magnetism of f.c.c. Heisenberg Ferromagnets. II. : Magnetic Field Dependence
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概要
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Magnetic field dependences of the surface magnetization are evaluated for f.c.c. Heisenberg Ferromagnets in the mean field approximation. Two different kinds of external magnetic fields, H and H_s, are assumed to exist; the former is uniform over whole crystal and the latter is localized in the surface layer. The weak field limit is examined in detail. It is found that the susceptibility of the surface layer with respect to the uniform field, H, varies in proportion to ∣T-T_c∣^<-1/2> for both above and below the Curie temperature T_c and that that with respect to the local fleld, H_s, caries as const. -(T-T_c)^<1/2> for T>T_c and as const. -(T_c-T) for T<T_c. These temperature dependences are also confirmed by the phenomenological treatments based on the Ginzburg-Landau equation. Validity of the Surface Sheet Model(SSM) is demonstrated.
- 社団法人日本物理学会の論文
- 1976-09-15
著者
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Fukuyama Hidetoshi
Department Of Applied Physics Faculty Of Science Tokyo University Of Science
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TAKEDA Tsuneharu
Department of physics, Tohoku University
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Takeda Tsuneharu
Department Of Physics Faculty Of Science Tohoku University
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Fukuyama Hidetoshi
Department of Applied Physics and Research Institute for Science and Technology, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan
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