Abstract
A new model of strong itinerant ferromagnetism, taking into account the presence of a narrow density-of-states peak at EF, which is due to merging of van Hove singularities, is proposed. The states of the peak (eg-type states for Fe) are treated within the framework of the Hubbard model with strong correlations. The role of the non-quasi-particle states, which lie near EF and are not described by the theory of the ferromagnetic Fermi liquid, is investigated. In particular, experimental data on the spin polarization of conduction electrons and T-dependence of resistivity are discussed.
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