Effect of Spin Fluctuations on Itinerant Electron Ferromagnetism
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概要
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The effect of electron correlation on itinerant electron ferromagnetism, or the correction to the Stoner (Hartree-Fock) theory, is studied. The additional free energy (correction to the Hartree-Fock contribution) as a function of magnetization is expressed exactly in terms of the transversal spin fluctuations or the transversal dynamical susceptibilities and is actually calculated by using a modified random phase approximation for the dynamical susceptibilities. This contribution turns out to be predominant in describing the thermodynamical properties of itinerant ferromagnets, leading to serious modification of the Stoner theory; the Curie temperature is lowered and the magnetic susceptibility shows approximate Curie-Weiss behavior.
- 社団法人日本物理学会の論文
- 1973-03-05
著者
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Moriya Toru
Institute For Solid State Physics The University Of Tokyo
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Kawabata Arisato
Institute For Solid State Physics University Of Tokyo:(present Address) Research Institute For Funda
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Kawabata Arisato
Institute For Solid State Physics University Of Tokyo
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