Effect of Spin Fluctuations on Itinerant Electron Ferromagnetism. II
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概要
- 論文の詳細を見る
The theory of the effect of spin fluctuations on itinerant electron ferromagnetism, which we have developed previously, is extended to include the ferromagnetic phase. The correction to the Hartree-Fock free energy as a function of magnetization is expressed in terms of the transversal dynamical susceptibilities and is actually calculated by using a modifiied random phase approximation for the dynamical susceptibilities; the random phase approximation is modified so as to give a consistent static limit throughout the whole temperature range covering both below and above the Curie point. As a result, the magnetization at low temperatures shows a T^<3/2> dependence due to the spin wave excitations, the Curie temperature is generally lowered from the Stoner (Hartree-Fock) value and the magnetic susceptibility above the Curie temperature shows an approximate Curie-Weiss behavior.
- 社団法人日本物理学会の論文
- 1973-09-05
著者
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KAWABATA Arisato
Research Institute for Fundamental Physics Kyoto University
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Moriya Toru
Institute For Solid State Physics The University Of Tokyo
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