Magnetostatic Propagation in a Dielectric Layered Structure

Abstract

The presence of a conductive plane near a thin magnetic film perturbs the propagation of a surface magnetostatic wave. This paper treats the case of a dielectric layered structure, and an expression for the characteristic dispersion is derived. The dispersion is unique with respect to magnetostatic propagation in that it is nonreciprocal and nonmonotonic. A dielectric layered structure consisting of an epitaxial YIG film separated from a conductive plane by a thin dielectric layer is considered theoretically. Experimental results for this structure are given for dispersion and insertion loss.