Static and Dynamical Properties of Antiferromagnetic Skyrmions in the Presence of Applied Current and Temperature

TL;DR

This paper explores the stabilization and manipulation of antiferromagnetic Skyrmions, revealing their unique dynamical properties under current and temperature, which could advance spintronic applications.

Contribution

It demonstrates that antiferromagnetic Skyrmions can be stabilized and manipulated, overcoming limitations of ferromagnetic Skyrmions, and analyzes their distinct dynamical behaviors.

Findings

Antiferromagnetic Skyrmions can be stabilized in magnetic materials.

They exhibit different dynamical responses to current and temperature.

Their composite nature cancels the Magnus force, enabling straight-line motion.

Abstract

Skyrmions are topologically protected entities in magnetic materials which have the potential to be used in spintronics for information storage and processing. However, Skyrmions in ferromagnets have some intrinsic difficulties which must be overcome to use them for spintronic applications, such as the inability to move straight along current. We show that Skyrmions can also be stabilized and manipulated in antiferromagnetic materials. An antiferromagnetic Skyrmion is a compound topological object with a similar but of opposite sign spin texture on each sublattice, which e.g. results in a complete cancelation of the Magnus force. We find that the composite nature of antiferromagnetic Skyrmions gives rise to different dynamical behavior, both due to an applied current and temperature effects.