Magnetostatic wave propagation in a multilayered magnetic structure with an arbitrary orientation between the static magnetizations

Abstract

The authors study magnetostatic wave propagation (MSW) in multilayered magnetic structure (YIG/GGG/YIG/GGG), in which the static magnetizations in the two magnetic layers are not colinear. It is assumed that there exists an arbitrary angle alpha between the two magnetizations for a given applied DC field. Therefore, the effect of the relative orientation between the two magnetizations in two different YIG layers on the dispersion and time delay can be explored. The misalignment alpha is determined by the applied DC field, the static magnetizations, and the uniaxial anisotropy fields. The general dispersion relation is strongly affected by alpha . It is this misalignment that leads to surface mode propagation in one layer and forward volume mode propagation in the other layer. One may control the applied DC field to vary alpha to obtain the desired nondispersive time delay for microwave signal processing.<>