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Prog. Theor. Phys. Supplement No.101 (1990) pp. 475-485
Magnetovolume Effects in Strongly and Intermediately Correlated Elecron Systems
Masayuki Shiga
Department of Metal Science and Technology, Kyoto University, Kyoto 606
(Received July 19, 1990)
Abstract:
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 effect of zero point spin fluctuations observed in the YMn2 system are discussed.
URL :
http://ptp.ipap.jp/link?PTPS/101/475/
DOI : 10.1143/PTPS.101.475
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