Theory of ferromagnetism for metals of cubic symmetry

The conditions for the occurrence of ferromagnetism in 3d metals of cubic s ymmetry are obtained based on the concept of strong interaction in a single unit cell. The Hubbard model with infinitely strong repulsion is invoked f or a quantitative description. The calculations are carried out in the zero -loop and one-loop approximations. The reasons for the occurrence of ferrom agnetism in nickel and alpha-iron and its absence in Pd, Pt, and gamma-iron are analyzed. (C) 2000 MAIK "Nauka/Interperiodica".