Hund's-Rule Coupling Effect in Itinerant Ferromagnetism

Details Hund's-Rule Coupling Effect in Itinerant Ferromagnetism Hund's-Rule Coupling Effect in Itinerant Ferromagnetism

1997-07-03

arxiv.org/abs/cond-mat/9707032v1

Physics

Condensed Matter

Strongly Correlated Electrons

19 pages, 10 figures, to appear in Prog.Theor.Phys

Scientific paper

10.1143/PTP.98.331

We present a general model which includes the ferromagnetic Kondo lattice and
the Hubbard model as special cases. The stability of the ferromagnetic state is
investigated variationally. We discuss the mechanism of ferromagnetism in
metallic nickel, emphasizing the importance of orbital degeneracy and the
effect of the Hund's-rule coupling.

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