# Broadband magnetoelastic coupling in magphonic crystals for high-frequency nanoscale spin wave generation

## TL;DR

This paper demonstrates how a one-dimensional magphonic crystal can be engineered to efficiently generate high-frequency spin waves through magnetoelastic coupling, combining numerical methods for design and analysis.

## Contribution

It introduces a novel magphonic crystal structure optimized for broad-band hybridization of spin and acoustic waves for high-frequency spin wave generation.

## Key findings

- Effective hybridization of spin and acoustic waves across the Brillouin zone.
- Optimized multilayer structure for high-frequency spin wave generation.
- Numerical validation using plane wave and finite element methods.

## Abstract

Spin waves are promising candidates for information carriers in advanced technology. The interactions between spin waves and acoustic waves in magnetic nanostructures are of much interest because of their potential application for spin wave generation, amplification and transduction. We investigate numerically the dynamics of magnetoelastic excitations in a one-dimensional magphonic crystal consisting of alternating layers of permalloy and cobalt. We use the plane wave method and the finite element method for frequency- and time-domain simulations, respectively. The studied structure is optimized for hybridization of specific spin-wave and acoustic dispersion branches in the entire Brillouin zone in a broad frequency range. We show that this type of periodic structure can be used for efficient generation of high-frequency spin waves.