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arXiv · 1605.06186

A centrosymmetric hexagonal magnet with superstable biskyrmion magnetic nanodomains in a wide temperature range of 100K to 340K

Wenhong Wang·Ying Zhang·Guizhou Xu·Licong Peng·Bei Ding·Yue Wang·Zhipeng Hou·Xiaoming Zhang·Xiyang Li·Enke Liu·Shouguo Wang·Jianwang Cai·Fangwei Wang·Jianqi Li·Fengxia Hu·Guangheng Wu·Baogen Shen·Xi-xiang Zhang
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Abstract

Here, we report on the experimental discovery of biskyrmion magnetic nanodomains at RT and the observation of a biskyrmion-derived topological Hall effect (THE) in the centrosymmetric hexagonal MnNiGa magnet. Using a phase reconstruction technique based on a transport-of-intensity equation (TIE), we established the texture of the biskyrmion spin. Results from Lorentz transmission electron microscopy (TEM) and the topological Hall effect revealed that the biskyrmion phase is stable over a much wider temperature range (100 K to ~340K) and a larger magnetic field range in our material than in skyrmion-hosting bulk crystals reported previously[1-3,6]. The super-wide operating temperature and the broad range of material options indicate important progress toward the realization of skyrmion-based spintronic devices.

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Wenhong Wang, Ying Zhang, Guizhou Xu, Licong Peng, Bei Ding, Yue Wang, Zhipeng Hou, Xiaoming Zhang, Xiyang Li, Enke Liu, Shouguo Wang, Jianwang Cai, Fangwei Wang, Jianqi Li, Fengxia Hu, Guangheng Wu, Baogen Shen, Xi-xiang Zhang. 2016-05-20. A centrosymmetric hexagonal magnet with superstable biskyrmion magnetic nanodomains in a wide temperature range of 100K to 340K. https://doi.org/10.1002/adma.201600889

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