Abstract
The relaxation times of spin waves in ferromagnetic dilute alloys of transition metals are calculated in the Wolff-Clogston model for dilute alloys, by using the random phase approximation and by taking into account exchange interactions among electrons in the host metal. It is found that there are two mechanisms of the damping of spin waves by an impurity i. e. , ordinary scatterings of spin waves and decompositions of spin waves into individual particles of an electron with down spin and a hole with up spin. It is shown that the relaxation time of a spin wave in the former process has the same dependence on the wave vector of the spin wave as that obtained in the Heisenberg model and the latter process of the damping of a spin wave is important in unsaturated ferromagnetic dilute alloys.
Published Version
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