Enhanced Stability of Antiferromagnetic Skyrmion during Its Motion by Anisotropic Dzyaloshinskii Moriya Interaction

TL;DR

This paper demonstrates that anisotropic Dzyaloshinskii Moriya interaction can deform and stabilize antiferromagnetic skyrmions during motion, increasing their velocity and stability for spintronic device applications.

Contribution

It introduces the role of anisotropic DM interaction in stabilizing and enhancing the velocity of AFM skyrmions during motion, supported by numerical simulations and Thiele theory analysis.

Findings

Anisotropic DM interaction induces skyrmion deformation.

Deformation suppresses distortion during motion.

Enhanced stability and velocity of AFM skyrmions achieved.

Abstract

Searching for new methods to enhance the stability of antiferromagnetic (AFM) skyrmion during its motion is an important issue for AFM spintronic devices. Herein, the spin polarized current-induced dynamics of a distorted AFM skyrmion is numerically studied, based on the Landau Lifshitz Gilbert simulations of the model with an anisotropic Dzyaloshinskii Moriya (DM) interaction. It is demonstrated that the DM interaction anisotropy induces the skyrmion deformation, which suppresses the distortion during the motion and enhances the stability of the skyrmion. Moreover, the effect of the DM interaction anisotropy on the skyrmion velocity is investigated in detail, and the simulated results are further explained by Thiele theory. This work unveils a promising strategy to enhance the stability and the maximum velocity of AFM skyrmion, benefiting future spintronic applications.