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arXiv · 2311.17411

Current-Controlled Skyrmion Number in Confined Ferromagnetic Nanostripes

Jialiang Jiang·Jin Tang·Yaodong Wu·Qi Zhang·Yihao Wang·Junbo Li·Yimin Xiong·Lingyao Kong·Shouguo Wang·Mingliang Tian·Haifeng Du
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Abstract

Skyrmions are vortex-like localized magnetic structures that possess an integer-valued topological index known as the skyrmion number or topological charge. Skyrmion number determines the topology-related emergent magnetism, which is highly desirable for advanced storage and computing devices. In order to achieve device functions, it is necessary to manipulate the skyrmion number in confined nanostructured geometries using electrical methods. Here, we report the reliable current-controlled operations for manipulating the skyrmion number through reversible topological transformations between skyrmion chains and stripe domains in confined Fe3Sn2 nanostripes. The results of micromagnetic simulations are successful in numerically reproducing our experiments and explaining them through the combined effect of current-induced Joule heating and magnetic hysteresis. These findings hold the potential to advance the development of topological spintronic devices.

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Jialiang Jiang, Jin Tang, Yaodong Wu, Qi Zhang, Yihao Wang, Junbo Li, Yimin Xiong, Lingyao Kong, Shouguo Wang, Mingliang Tian, Haifeng Du. 2023-11-29. Current-Controlled Skyrmion Number in Confined Ferromagnetic Nanostripes. https://doi.org/10.1002/adfm.202304044

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