Emission of coherent propagating magnons by insulator-based spin-orbit torque oscillators

TL;DR

This paper demonstrates the experimental generation of coherent propagating magnons in ultra-thin magnetic-insulator films using spin-orbit torque induced by direct current, advancing insulator-based spintronic technology.

Contribution

It introduces a novel method to generate coherent magnons in magnetic insulators via spin-orbit torque, utilizing films with large perpendicular magnetic anisotropy.

Findings

Successful generation of coherent propagating magnons

Development of flexible, efficient spin-orbit torque devices

Potential applications in insulator-based spintronics

Abstract

We experimentally demonstrate generation of coherent propagating magnons in ultra-thin magnetic-insulator films by spin-orbit torque induced by dc electric current. We show that this challenging task can be accomplished by utilizing magnetic-insulator films with large perpendicular magnetic anisotropy. We demonstrate simple and flexible spin-orbit torque devices, which can be used as highly efficient nanoscale sources of coherent propagating magnons for insulator-based spintronic applications.