Voltage-controlled spin-wave intermodal coupling in lateral ensembles of magnetic stripes with patterned piezoelectric layer

A A Grachev,A V Sadovnikov,S E Sheshukova,E N Beginin

doi:10.1063/9.0000151

Abstract

Here we report about the strain-tuned dipolar spin-wave coupling in the adjacent system of yttrium iron garnet stripes, which were strain-coupled with the patterned piezoelectric layer. Spatially-resolved laser ablation technique was used for structuring the surface of the piezoelectric layer and electrodes on top of it. Using a phenomenological model based on coupled modes equation, we demonstrate a voltage-controlled intermodal coupling in lateral magnonic stripes. The features of the tunable spin-wave coupling by changing the geometric parameters and the type of magnetization is demonstrated.

Highlights

The using elementary quanta of magnetic excitations (magnons or spin waves (SW)) as carriers of information signals has attracted more interest in recent years due to the possibility of transferring the magnetic moment of an electron without transferring an electric charge and without generating Joule heat inherent in semiconductor technologies.1–5 The properties of SWs are determined by the dipolar and exchange interactions in magnetic medias6–8 and can change significantly during structuring of magnetic films
A thin ferrites films is used for these purposes, for example, yttrium iron garnet (YIG) which demonstrates record low values of the spin-wave damping parameter
The using of YIG films opens a possibility to create functional elements of magnonic networks based on the study the properties of spin waves propagating along irregular magnetic stripes with broken translational symmetry

Summary

Introduction

The using elementary quanta of magnetic excitations (magnons or spin waves (SW)) as carriers of information signals has attracted more interest in recent years due to the possibility of transferring the magnetic moment (spin) of an electron without transferring an electric charge and without generating Joule heat inherent in semiconductor technologies.1–5 The properties of SWs are determined by the dipolar and exchange interactions in magnetic medias6–8 and can change significantly during structuring of magnetic films. The voltage-controlled tunability of the spin-wave spectra in the thin magnonic films carried out due to the transformation of the effective internal magnetic field.

Results

Conclusion