Spin-Wave Resonance in Magnetic Films on the Basis of the Surface-Spin-Pinning Model and the Volume Inhomogeneity Model

Abstract

Two models of spin-wave resonance in magnetic films are briefly reviewed. These are the surface-spin-pinning model and the volume inhomogeneity model. The intensities and frequencies of the resonance lines, the spin-wave-phonon interaction, the critical angle, and several other experiments are then discussed in relation to these two models. It is concluded that the evidence tends to favor the volume inhomogeneity model with surface spin pinning being very weak or absent. A consequence of this conclusion is that it is very difficult to determine exchange parameters by means of spin-wave resonance in films.