Magnon-driven dynamics of frustrated skyrmion in synthetic antiferromagnets: Effect of skyrmion precession

TL;DR

This paper theoretically investigates how magnon interactions influence the dynamics of frustrated skyrmions in synthetic antiferromagnets, revealing that skyrmion precession modulates the Hall motion and can be controlled by magnon intensity and damping.

Contribution

It introduces a theoretical model showing how skyrmion precession affects magnon scattering and skyrmion Hall motion, supported by atomistic micromagnetic simulations.

Findings

Skyrmion precession reduces the Hall angle as precession speed increases.

Magnon intensity and damping influence skyrmion precession speed and Hall angle.

Precession effectively suppresses skyrmion Hall motion in frustrated magnets.

Abstract

A theoretical study on the interplay of frustrated skyrmion and magnons is useful for revealing new physics and future experiments design. In this work, we investigated the magnon-driven dynamics of frustrated skyrmion in synthetic antiferromagnets, focusing on the effect of skyrmion precession. It is theoretically revealed that the scattering cross section of the injected magnons depends on the skyrmion precession, which in turn effectively modulates the skyrmion Hall motion. Specifically, the Hall angle decreases as the precession speed increases, which is also verified by the atomistic micromagnetic simulations. Moreover, the precession speed and the Hall angle of the frustrated skyrmion depending on the magnon intensity and damping constant are simulated, demonstrating the effective suppression of the Hall motion by the skyrmion precession. This work provides a comprehensive understanding of the magnon-skyrmion scattering in frustrated magnets, benefiting future spintronic and magnonic applications.