THE PROBLEMS OF MAGNETIC INSTABILITY OF THE SUBSYSTEM OF ZONAL D-ELECTRONS
When studying the specific features of magnetism of metals and intermetallic compounds, the phenomena associated with magnetic instability of the subsystem of zonal -electrons are of great interest. These phenomena are caused by the threshold nature of ferromagnetism of the system of collectivized electrons, according to which, with certain characteristics of the zonal structure, a situation when the density of states at the Fermi level increases with the increasing magnetic field is possible. If in the zero field the system of collectivized electrons was in a paramagnetic state, in a certain field , a jump-like (metamagnetic) transition of the system of collectivized electrons from the paramagnetic state to the ferromagnetic one takes place. The investigation of the effect of the exchange field on metamagnets is an efficient method of studying their properties. The objective of this work was to study the effect of the exchange field on the behavior of zonal metamagnets and to determine their basic magnetic state.