Reversible conversion between skyrmions and skyrmioniums

Sheng Yang, Yuelei Zhao, Kai Wu, Zhiqin Chu, Xiaohong Xu, Xiaoguang Li (), Johan Åkerman () and Yan Zhou ()
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Sheng Yang: The Chinese University of Hong Kong
Yuelei Zhao: The Chinese University of Hong Kong
Kai Wu: The Chinese University of Hong Kong
Zhiqin Chu: The University of Hong Kong
Xiaohong Xu: Research Institute of Materials Science of Shanxi Normal University & Collaborative Innovation Center for Shanxi Advanced Permanent Magnetic Materials and Technology
Xiaoguang Li: Shenzhen Technology University
Johan Åkerman: University of Gothenburg
Yan Zhou: The Chinese University of Hong Kong

Nature Communications, 2023, vol. 14, issue 1, 1-8

Abstract: Abstract Skyrmions and skyrmioniums are topologically non-trivial spin textures found in chiral magnetic systems. Understanding the dynamics of these particle-like excitations is crucial for leveraging their diverse functionalities in spintronic devices. This study investigates the dynamics and evolution of chiral spin textures in [Pt/Co]3/Ru/[Co/Pt]3 multilayers with ferromagnetic interlayer exchange coupling. By precisely controlling the excitation and relaxation processes through combined magnetic field and electric current manipulation, reversible conversion between skyrmions and skyrmioniums is achieved. Additionally, we observe the topological conversion from a skyrmionium to a skyrmion, characterized by the sudden emergence of the skyrmion Hall effect. The experimental realization of reversible conversion between distinct magnetic topological spin textures represents a significant development that promises to expedite the advancement of the next generation of spintronic devices.

Date: 2023
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DOI: 10.1038/s41467-023-39007-1

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