Stabilization and current-induced motion of antiskyrmion in the presence of anisotropic Dzyaloshinskii-Moriya interaction

Topological defects in magnetism have attracted great attention due to fundamental research interests and potential novel spintronics applications. Rich examples of topological defects can be found in nanoscale nonuniform spin textures, such as monopoles, domain walls, vortices, and skyrmions. Recen...

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Bibliographic Details
Published in:Physical review. B 2017-10, Vol.96 (14), Article 144412
Main Authors: Huang, Siying, Zhou, Chao, Chen, Gong, Shen, Hongyi, Schmid, Andreas K., Liu, Kai, Wu, Yizheng
Format: Article
Language:English
Subjects:
Anisotropy
Computer simulation
Defects
Domain walls
Electromagnetism
Hall effect
Hypothetical particles
Magnetism
Particle theory
Spintronics
Stabilization
Topology
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Summary:Topological defects in magnetism have attracted great attention due to fundamental research interests and potential novel spintronics applications. Rich examples of topological defects can be found in nanoscale nonuniform spin textures, such as monopoles, domain walls, vortices, and skyrmions. Recently, skyrmions stabilized by the Dzyaloshinskii-Moriya interaction have been studied extensively. However, the stabilization of antiskyrmions is less straightforward. Here, using numerical simulations we demonstrate that antiskyrmions can be a stable spin configuration in the presence of anisotropic Dzyaloshinskii-Moriya interaction. We find current-driven antiskyrmion motion that has a transverse component, namely, the antiskyrmion Hall effect. The antiskyrmion gyroconstant is opposite to that for skyrmion, which allows the current-driven propagation of coupled skyrmion-antiskyrmion pairs without an apparent skyrmion Hall effect. The antiskyrmion Hall angle strongly depends on the current direction, and a zero antiskyrmion Hall angle can be achieved at a critic current direction. These results open up possibilities to tailor the spin topology in nanoscale magnetism, which may be useful in the emerging field of skyrmionics.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.96.144412