Surface Magnetostatic Modes and Surface Spin Waves

Abstract

Examination of the spatial configuration of the magnetostatic modes of a ferromagnetic body shows that those modes whose frequency lies between $\omega =\gamma {\left(B_i{H}_i\right)}^{\frac{1}{2}}$ and $\omega =\gamma (H_i+2\mathrm{}\pi M)$ are surface modes. It is also found that the complete spin-wave spectrum consists of a set of surface spin waves in addition to the spin-wave band usually considered. The magnetostatic mode spectrum thus merges smoothly into the spin-wave spectrum.