On the theory of phase transitions in conducting magnets
A. P. IvashinNational Research Center, Kharkov Physicotechnical Institute, 310108 KharkovВ. В. КрасильниковNational Research Center, Kharkov Physicotechnical Institute, 310108 KharkovА. А. РожковNational Research Center, Kharkov Physicotechnical Institute, 310108 Kharkov
ABI
Abstract
Various types of magnetic ordering (ferromagnetic, spiral, and modulated structures) in a system of electrons and localized spins are considered by using the Fermi-liquid approach, taking the RKKY interaction into account. Self-consistent equations are derived for the order parameters of magnetically ordered phases. These equations are used in the analysis of the first- and second-order phase transitions in the Landau theory. The phase diagram is constructed, and the conditions of existence of the ferromagnetic, spiral, and modulated phases are determined.
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