Interplay between spin wave and magnetic vortex

TL;DR

This paper investigates the interactions between spin waves and magnetic vortices, revealing three magnon scattering types, vortex core modes, and proposing a vortex-based spin wave valve for phase control.

Contribution

It introduces a detailed analysis of magnon scattering mechanisms and vortex core modes, and proposes a novel vortex-based spin wave valve with phase control capabilities.

Findings

Identified three magnon scattering types linked to magnetic topology and energy distribution.

Discovered two vortex core translational modes excited by spin-transfer torque.

Proposed a vortex-based spin wave valve enabling arbitrary phase shift control.

Abstract

In this paper, the interplay between spin wave and magnetic vortex is studied. We find three types of magnon scatterings: skew scattering, symmetric side deflection and back reflection, which associate with respectively magnetic topology, energy density distribution and linear momentum transfer torque within vortex. The vortex core exhibits two translational modes: the intrinsic circular mode and a coercive elliptical mode, which can be excited based on permanent and periodic magnon spin-transfer torque effects of spin wave. Lastly, we propose a vortex-based spin wave valve in which via inhomogeneity modulation we access arbitrary control of the phase shift.