Non-volatile multi-state magnetic domain transformation in a Hall balance

doi:10.1088/1674-1056/ac65f5

中国物理B ›› 2022, Vol. 31 ›› Issue (6): 67502-067502.doi: 10.1088/1674-1056/ac65f5

Non-volatile multi-state magnetic domain transformation in a Hall balance

Yang Gao(高阳)^1,2, Jingyan Zhang(张静言)^3,†, Pengwei Dou(窦鹏伟)³, Zhuolin Li(李卓霖)², Zhaozhao Zhu(朱照照)^2,4, Yaqin Guo(郭雅琴)¹, Chaoqun Hu(胡超群)¹, Weidu Qin(覃维都)¹, Congli He(何聪丽)¹, Shipeng Shen(申世鹏)¹, Ying Zhang(张颖)^2,4,‡, and Shouguo Wang(王守国)^1,§

1 Institute of Advanced Materials, Beijing Normal University, Beijing 100875, China;
2 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
3 School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
4 Songshan Lake Materials Laboratory, Dongguan 523808, China

收稿日期:2022-03-28 修回日期:2022-04-03 接受日期:2022-04-11 出版日期:2022-05-17 发布日期:2022-05-31
通讯作者: Jingyan Zhang, Ying Zhang, Shouguo Wang E-mail:jyzhang@ustb.edu.cn;zhangy@iphy.ac.cn;sgwang@bnu.edu.cn
基金资助:
This work was supported by the Science Center of the National Science Foundation of China (Grant No. 52088101), the National Natural Science Foundation of China (Grant Nos. 11874408, 52130103, 51901025, and 11904025), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB33030100), and the Youth Innovation Promotion Association of Chinese Academy of Sciences (Grant No. CAS Y201903).

Non-volatile multi-state magnetic domain transformation in a Hall balance

1 Institute of Advanced Materials, Beijing Normal University, Beijing 100875, China;
2 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
3 School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
4 Songshan Lake Materials Laboratory, Dongguan 523808, China

Received:2022-03-28 Revised:2022-04-03 Accepted:2022-04-11 Online:2022-05-17 Published:2022-05-31
Contact: Jingyan Zhang, Ying Zhang, Shouguo Wang E-mail:jyzhang@ustb.edu.cn;zhangy@iphy.ac.cn;sgwang@bnu.edu.cn
Supported by:
This work was supported by the Science Center of the National Science Foundation of China (Grant No. 52088101), the National Natural Science Foundation of China (Grant Nos. 11874408, 52130103, 51901025, and 11904025), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB33030100), and the Youth Innovation Promotion Association of Chinese Academy of Sciences (Grant No. CAS Y201903).

摘要/Abstract

摘要： High performance of the generation, stabilization and manipulation of magnetic skyrmions prompts the application of topological multilayers in spintronic devices. Skyrmions in synthetic antiferromagnets (SAF) have been considered as a promising alternative to overcome the limitations of ferromagnetic skyrmions, such as the skyrmion Hall effect and stray magnetic field. Here, by using the Lorentz transmission electron microscopy, the interconversion between the single domain, labyrinth domain and skyrmion state can be observed by the combined manipulation of electric current and magnetic field in a Hall balance (a SAF with the core structure of [Co/Pt]₄/NiO/[Co/Pt]₄ showing perpendicular magnetic anisotropy). Furthermore, high-density room temperature skyrmions can be stabilized at zero field while the external stimulus is removed and the skyrmion density is tunable. The generation and manipulation method of skyrmions in Hall balance in this study opens up a promising way to engineer SAF-skyrmion-based memory devices.

关键词: magnetic skyrmion, Hall balance, electromagnetic coordinated manipulation, Lorentz transmission electron microscopy (LTEM)

Abstract: High performance of the generation, stabilization and manipulation of magnetic skyrmions prompts the application of topological multilayers in spintronic devices. Skyrmions in synthetic antiferromagnets (SAF) have been considered as a promising alternative to overcome the limitations of ferromagnetic skyrmions, such as the skyrmion Hall effect and stray magnetic field. Here, by using the Lorentz transmission electron microscopy, the interconversion between the single domain, labyrinth domain and skyrmion state can be observed by the combined manipulation of electric current and magnetic field in a Hall balance (a SAF with the core structure of [Co/Pt]₄/NiO/[Co/Pt]₄ showing perpendicular magnetic anisotropy). Furthermore, high-density room temperature skyrmions can be stabilized at zero field while the external stimulus is removed and the skyrmion density is tunable. The generation and manipulation method of skyrmions in Hall balance in this study opens up a promising way to engineer SAF-skyrmion-based memory devices.

Key words: magnetic skyrmion, Hall balance, electromagnetic coordinated manipulation, Lorentz transmission electron microscopy (LTEM)

中图分类号: (Domain walls and domain structure)

75.60.Ch

75.50.Ee (Antiferromagnetics) 75.70.Cn (Magnetic properties of interfaces (multilayers, superlattices, heterostructures)) 68.37.Lp (Transmission electron microscopy (TEM))

Yang Gao(高阳), Jingyan Zhang(张静言), Pengwei Dou(窦鹏伟), Zhuolin Li(李卓霖), Zhaozhao Zhu(朱照照), Yaqin Guo(郭雅琴), Chaoqun Hu(胡超群), Weidu Qin(覃维都), Congli He(何聪丽), Shipeng Shen(申世鹏), Ying Zhang(张颖), and Shouguo Wang(王守国). Non-volatile multi-state magnetic domain transformation in a Hall balance[J]. 中国物理B, 2022, 31(6): 67502-067502.

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Non-volatile multi-state magnetic domain transformation in a Hall balance

Non-volatile multi-state magnetic domain transformation in a Hall balance

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