Tuning edge localized spin waves in magnetic microstripes by proximate magnetic structures

TL;DR

This study uses micromagnetic simulations to explore how proximate magnetic structures, like permalloy stripes, influence edge localized spin waves in YIG microstripes, revealing potential for advanced spin wave logic devices.

Contribution

It demonstrates how magnetic microstructures can tune edge localized spin waves in YIG microstripes, introducing a new method for controlling spin wave properties.

Findings

Splitting of the dispersion curve due to permalloy stripe

Different wavelengths, velocities, and decay lengths of E-SWs on two edges

Permalloy stripe induces inhomogeneous static dipolar fields without dynamic coupling

Abstract

The propagation of edge localized spin waves (E-SWs) in yttrium iron garnet (YIG) microstripes with/without the proximate magnetic microstructures is investigated by micromagnetic simulations. A splitting of the dispersion curve with the presence of permalloy (Py) stripe is also observed. The E-SWs on the two edges of YIG stripe have different wavelengths, group velocities, and decay lengths at the same frequencies. The role of the Py stripe was found to be the source of the inhomogeneous static dipolar field without dynamic coupling with YIG. This work opens new perspectives for the design of innovative SW interference-based logic devices.