Magnetic Properties of Dilute Alloys: Equations for Magnetization and Its Structural Fluctuations

Abstract

The dilute Heisenberg ferromagnet is studied taking into account fluctuations of magnetization caused by disorder. A self-consistent system of equations for magnetization and its mean quadratic fluctuations are derived within the configurationally averaged two-time temperature Green's function method. This system of equations is analyzed at low concentration of nonmagnetic impurities. Mean relative quadratic fluctuations of magnetization are revealed to be proportional to the square of concentration of impurities.