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arXiv · 2604.08845

Antitopological magnetic textures in an antiferromagnetically coupled bilayer with frustration

Lewei Zhou·Jun Chen·Zhong Shen·Shuai Dong·Xiaoyan Yao
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Abstract

The bilayer skyrmion composed of upper and lower tightly coupled skyrmions on two layers with completely compensated topological charges (called as anti-topology here), has become one feasible improvement of conventional skyrmion to realize straight motion without skyrmion Hall effect, which has aroused great interest in practical applications. The present work investigates a general model (without external magnetic field) for the frustration-induced anti-topological bilayer magnetic textures with rich morphologies, and discusses the modulations of key parameters on the energy barrier and the current-driven dynamics. It is revealed that the interlayer coupling plays a key role in preventing distortion, and thus helps to reach a faster velocity. This model can be realized in various frustrated magnetic materials with antiferromagnetically coupled bilayer, providing a helpful guidance for the material design and application of topological magnetic textures.

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Lewei Zhou, Jun Chen, Zhong Shen, Shuai Dong, Xiaoyan Yao. 2026-04-10. Antitopological magnetic textures in an antiferromagnetically coupled bilayer with frustration. https://doi.org/10.1103/c93q-gcf3

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