Effect of exchange field on the damping of spin-wave resonance modes

Abstract

An extension of a previously used calculation has been shown to explain adequately the linewidths and intensities of the higher-order spin-wave resonances in thin films of 75%-25% permalloy. Observations at 9, 22, and 32 GHz have been used to determine that the relaxation frequency, $\lambda$, is 0.88 × ${10}^8$/sec, independent of $k$.