Magnetic field direction dependent antiskyrmion motion with microwave electric fields

TL;DR

This paper demonstrates how antiskyrmions can be controlled and directed using in-plane magnetic fields and microwave electric fields, revealing their potential for low-energy spintronic device applications.

Contribution

It introduces a novel method to manipulate antiskyrmion motion through combined magnetic and microwave electric fields, highlighting the dependence on field direction and resonance effects.

Findings

Antiskyrmion velocity peaks at resonance frequency.

Propagation direction depends on magnetic field orientation.

The Hall angle can be tuned or nullified by magnetic field direction.

Abstract

Magnetic skyrmions are regarded as promising information candidates in future spintronic devices, which have been investigated theoretically and experimentally in isotropic system. Recently, the sta- bilization of antiskyrmions in the presence of anisotropic Dzyaloshinskii-Moriya interaction and its dynamics driven by current have been investigated. Here, we report the antiskyrmion motion with the combined action of the in-plane magnetic field and microwave electric fields. The in-plane mag- netic field breaks the rotation symmetry of the antiskyrmion, and perpendicular microwave electric field induces the pumping of magnetic anisotropy, leading to antiskyrmion breathing mode. With above two effects, the antiskyrmion propagates with a desired trajectory. Antiskyrmion propagation velocity depends on the frequency, amplitude of anisotropy pumping, and damping constant as well as strength of in-plane field, which reaches the maximum value when the frequency of microwave electric field is in consist with the resonance frequency of antiskyrmion. Moreover, we show that the antiskyrmion propagation depends on the direction of magnetic field, where the antiskyrmion Hall angle can be suppressed or enhanced. At a critical direction of magnetic field, the Hall angle is zero. Our results introduce a possible application of antiskyrmion in antiskyrmion-based spintronic devices with lower energy consumption.