Magnetovolume Effects in Strongly and Intermediately Correlated Electron Systems
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概要
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Analyses of magnetovolume effects such as the forced volume magnetostriction and the thermal expansion anomaly can give estimation of local amplitude of spin fluctuations. We have shown that bcc Fe has a rigid magnetic moment and that the magnetic moment of Invar type alloys is rather soft. It is pointed out that the total energy difference between the magnetized state and the nonmagnetic state obtained by self-consistent energy band calculations using a local-spin-density approximation is much higher than the Curie temperature for rigid spin systems and comparable for soft spin systems. The effects of zero point spin fluctuations observed in the YMn_2, system are discussed.
- 理論物理学刊行会の論文
- 1991-02-05
著者
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Shiga Masayuki
Department Of Material Science And Engineering Kyoto University
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Shiga Masayuki
Department Of Metal Science And Technology Kyoto University
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