Bulk and surface spin waves in thin‐film antiferromagnets

摘要

We discuss antiferromagnetic bulk and surface spin waves, in the long wavelength region, on a finite thickness slab geometry. Implicit dispersion relations for both surface and bulk modes are derived, along with numerical calculations for MnF2 and GdAlO3. We find that the application of a magnetic field strongly localizes the surface spin wave to either the top or bottom surface of the film.