ON THE MICROSCOPIC MODEL OF FE AND NI - THE POSSIBLE BREAKDOWN OF THEFERROMAGNETIC FERMI-LIQUID PICTURE

A new model of strong itinerant ferromagnetism, taking into account th e presence of a narrow density-of-states peak at E(F), which is due to merging of van Hove singularities, is proposed. The states of the pea k (e(g)-type states for Fe) are treated within the framework of the Hu bbard model with strong correlations. The role of the non-quasi-partic le states, which lie near E(F) and are not described by the theory of the ferromagnetic Fermi liquid, is investigated. In particular, experi mental data on the spin polarization of conduction electrons and T-dep endence of resistivity are discussed.