Phase Transitions in the Binary Alloys with Annealed Magnetic Impurities

Abstract

In this paper we study within the Ising model a ferromagnet with annealed impurities in thermodynamic equilibrium with the lattice by the method of averaging over the exchange-interaction fields. We show that diffusion can significantly reduce the average critical concentration of "ferromagnetic" atoms and increase the Curie temperature. Also diffusion leads to the appearance of regions with high concentrations of ferromagnetic atoms on a background field with their low content.