Field-free topological behavior in the magnetic domain wall of ferrimagnetic GdFeCo

Zhuolin Li, Jian Su, Shi-Zeng Lin, Dan Liu, Yang Gao, Shouguo Wang, Hongxiang Wei, Tongyun Zhao, Ying Zhang (), Jianwang Cai and Baogen Shen
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Zhuolin Li: Chinese Academy of Sciences
Jian Su: Chinese Academy of Sciences
Shi-Zeng Lin: Los Alamos National Laboratory
Dan Liu: Beijing Technology and Business University
Yang Gao: Beijing Normal University
Shouguo Wang: Beijing Normal University
Hongxiang Wei: Chinese Academy of Sciences
Tongyun Zhao: Chinese Academy of Sciences
Ying Zhang: Chinese Academy of Sciences
Jianwang Cai: Chinese Academy of Sciences
Baogen Shen: Chinese Academy of Sciences

Nature Communications, 2021, vol. 12, issue 1, 1-7

Abstract: Abstract Exploring and controlling topological textures such as merons and skyrmions has attracted enormous interests from the perspective of fundamental research and spintronic applications. It has been predicted theoretically and proved experimentally that the lattice form of topological meron-skyrmion transformation can be realized with the requirement of external magnetic fields in chiral ferromagnets. However, such topological transition behavior has yet to be verified in other materials. Here, we report real-space observation of magnetic topology transformation between meron pairs and skyrmions in the localized domain wall of ferrimagnetic GdFeCo films without the need of magnetic fields. The topological transformation in the domain wall of ferrimagnet is introduced by temperature-induced spin reorientation transition (SRT) and the underlying mechanism is revealed by micromagnetic simulations. The convenient electric-controlling topology transformation and driving motion along the confined domain wall is further anticipated, which will enable advanced application in magnetic devices.

Date: 2021
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DOI: 10.1038/s41467-021-25926-4

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