Microscopic description of relaxation of impurity magnetic atoms in spiral magnetics

Abstract

Kinetics of the impurity magnetic atoms in spiral magnetic is researched. The spectrum of the excitations of the impurity spin is obtained in approximation of weakly coupling. The equation for impurity density matrix up to second order of the perturbation theory is obtained. For impurity spin s=1/2 the kinetic coefficients in terms of correlation functions are found.