Remarks on Spin-Wave Theory for the Ferromagnetic Exchange Problem
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概要
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A theory which is essentially equivalent to Bloch-Bethe-Van Kranendonk's formalism is developed of the properties of an ideal ferromagnet with isotropic exchange coupling between nearest neighbour spins 1 / 2. Concerning the thermodynamic properties of the system at low temperatures far below the Curie point a complete treatment is obtained. In this temperature region the excitation of the system is naturally described in terms of spin waves which obey Fermi-Dirac statistics. Interactions between spin waves are discussed in the scheme of the second quantization, and their effects to the spontaneous magnetization are also discussed.
- 理論物理学刊行会の論文
- 1958-02-25
著者
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Mannari Isao
Department Of Physics Kyoto University
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Mannari Isao
Department Of Physics Faculty Of Liberal Arts And Science Shizuoka University
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MANNARI Isao
Department of Physics, Kyoto University
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