中国物理B ›› 2018, Vol. 27 ›› Issue (6): 66802-066802.doi: 10.1088/1674-1056/27/6/066802

所属专题: TOPICAL REVIEW — Electron microscopy methods for emergent materials and life sciences

• TOPICAL REVIEW—Electron microscopy methods for the emergent materials and life sciences • 上一篇    下一篇

Lorentz transmission electron microscopy studies on topological magnetic domains

Li-Cong Peng(彭丽聪), Ying Zhang(张颖), Shu-Lan Zuo(左淑兰), Min He(何敏), Jian-Wang Cai(蔡建旺), Shou-Guo Wang(王守国), Hong-Xiang Wei(魏红祥), Jian-Qi Li(李建奇), Tong-Yun Zhao(赵同云), Bao-Gen Shen(沈保根)   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
  • 收稿日期:2018-04-19 修回日期:2018-05-09 出版日期:2018-06-05 发布日期:2018-06-05
  • 通讯作者: Ying Zhang E-mail:zhangy@iphy.ac.cn
  • 基金资助:

    Project supported by the National Key Research and Development Program of China (Grant No.2016YFB0700902),the National Natural Science Foundation of China (Grant Nos.51590880,11674379,51431009,11674373,and 51625101),and the Youth Innovation Promotion Association of the Chinese Academy of Sciences (Grant No.2015004).

Lorentz transmission electron microscopy studies on topological magnetic domains

Li-Cong Peng(彭丽聪)1,2, Ying Zhang(张颖)1, Shu-Lan Zuo(左淑兰)1,2, Min He(何敏)1,2, Jian-Wang Cai(蔡建旺)1,2, Shou-Guo Wang(王守国)3, Hong-Xiang Wei(魏红祥)1, Jian-Qi Li(李建奇)1,2, Tong-Yun Zhao(赵同云)1, Bao-Gen Shen(沈保根)1,2   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2018-04-19 Revised:2018-05-09 Online:2018-06-05 Published:2018-06-05
  • Contact: Ying Zhang E-mail:zhangy@iphy.ac.cn
  • Supported by:

    Project supported by the National Key Research and Development Program of China (Grant No.2016YFB0700902),the National Natural Science Foundation of China (Grant Nos.51590880,11674379,51431009,11674373,and 51625101),and the Youth Innovation Promotion Association of the Chinese Academy of Sciences (Grant No.2015004).

摘要:

Lorentz transmission electron microscopy (TEM) is a powerful tool to study the crystal structures and magnetic domain structures in correlation with novel physical properties. Nanometric topological magnetic configurations such as vortices, bubbles, and skyrmions have received enormous attention from the viewpoint of both fundamental science and potential applications in magnetic logic and memory devices, in which understanding the physical properties of magnetic nanodomains is essential. In this review article, several magnetic imaging methods in Lorentz TEM including the Fresnel and Foucault modes, electron holography, and differential phase contrast (DPC) techniques are discussed, where the novel properties of topological magnetic domains are well addressed. In addition, in situ Lorentz TEM demonstrates that the topological domains can be efficiently manipulated by electric currents, magnetic fields, and temperatures, exhibiting novel phenomena under external fields, which advances the development of topological nanodomain-based spintronics.

关键词: in situ Lorentz TEM, magnetic vortices, magnetic bubbles, magnetic skyrmions

Abstract:

Lorentz transmission electron microscopy (TEM) is a powerful tool to study the crystal structures and magnetic domain structures in correlation with novel physical properties. Nanometric topological magnetic configurations such as vortices, bubbles, and skyrmions have received enormous attention from the viewpoint of both fundamental science and potential applications in magnetic logic and memory devices, in which understanding the physical properties of magnetic nanodomains is essential. In this review article, several magnetic imaging methods in Lorentz TEM including the Fresnel and Foucault modes, electron holography, and differential phase contrast (DPC) techniques are discussed, where the novel properties of topological magnetic domains are well addressed. In addition, in situ Lorentz TEM demonstrates that the topological domains can be efficiently manipulated by electric currents, magnetic fields, and temperatures, exhibiting novel phenomena under external fields, which advances the development of topological nanodomain-based spintronics.

Key words: in situ Lorentz TEM, magnetic vortices, magnetic bubbles, magnetic skyrmions

中图分类号:  (Transmission electron microscopy (TEM))

  • 68.37.Lp
75.70.Kw (Domain structure (including magnetic bubbles and vortices)) 75.60.Ch (Domain walls and domain structure)