Temperature dependence of SSW linewidth in metallic thin films

Abstract

Measurements of the standing spin wave linewidth ΔH _n at 17·6 GHz from 6 °K to 400 °K are presented for two permalloy films whose structure is either polycrystalline or epitaxial. It is shown that in both films, ΔH _n is proportional ton² (n is the mode number). Although ΔH _n is little modified by temperature (20% variation maximum over the entire temperature range), we experimentally state that the slopep of ΔH _n (n²) is a linear function of the saturation magnetizationM which agrees with a planar inhomogeneity model.