Influence of the electrical conductivity of a metal screen on the propagation of spin waves in YIG bilayer films

This study investigates the influence of the electrical conductivity of a metal screen on the propagation characteristics of spin waves in a bilayer film consisting of yttrium iron garnet (YIG). Using numerical modeling with the finite element method, dispersion characteristics were obtained for various values of the metal screen's electrical conductivity. It was found that decreasing the electrical conductivity of the metal screen reduces the interaction of the waves with it. As frequency and wave number increase, the propagation characteristics of spin waves become more similar to those in a regular bilayer film without a metal screen. These results can be utilized in developing new magnonic devices with improved characteristics and the ability to control spin wave propagation processes, opening new prospects for the advancement of magnonics and spintronics.