SPIN FLUCTUATIONS IN ITINERANT ELECTRON MAGNETISM

T. Moriya , Y. Takahashi

A general theory of spin fluctuations and thermodynamical properties of itinerant electron magnets is developed, interpolating between the weakly and strongly ferromagnetic limits. A unified expression is given for the Curie temperature and the physical meaning of the Curie-Weiss magnetic susceptibility is discussed. As new phenomena derived from this theory the temperature-induced local magnetic moments as observed in CoS2, CoSe2, etc. and peculiar magnetic and thermal properties of nearly ferromagnetic semiconductors such as FeSi are discussed.

Domaines: Articles anciens

T. Moriya, Y. Takahashi. SPIN FLUCTUATIONS IN ITINERANT ELECTRON MAGNETISM. Journal de Physique Colloques, 1978, 39 (C6), pp.C6-1466-C6-1471. ⟨10.1051/jphyscol:19786588⟩. ⟨jpa-00218080⟩