Resonant Spin Pumping in an Acoustic Microwave Resonator with ZnO-GGG-YIG/Pt Structure

Abstract

A theory of acoustic spin pumping in a bulk acoustic wave resonator with a ZnO-YIG-GGG-YIG/Pt structure is presented, with allowance for the exchange contribution to the formation of a coupled magnetoelastic wave spectrum, and the back action of acoustically excited magnetic dynamics in YIG films on the elastic subsystem in all layers. Good agreement is achieved between the theoretical and experimental frequency–field dependences of the resonant frequencies of the resonator and the voltage magnitude of the inverse spin Hall effect in Pt.