Lorentz transmission electron microscopy for magnetic skyrmions imaging

doi:10.1088/1674-1056/28/8/087503

中国物理B ›› 2019, Vol. 28 ›› Issue (8): 87503-087503.doi: 10.1088/1674-1056/28/8/087503

所属专题： TOPICAL REVIEW — Fundamental research under high magnetic fields

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇下一篇

Lorentz transmission electron microscopy for magnetic skyrmions imaging

Jin Tang(汤进), Lingyao Kong(孔令尧), Weiwei Wang(王伟伟), Haifeng Du(杜海峰), Mingliang Tian(田明亮)

1 High Magnetic Field Laboratory, Chinese Academy of Sciences(CAS), Hefei 230031, China;
2 School of Physics and Materials Science, Anhui University, Hefei 230601, China;
3 Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China

收稿日期:2019-05-17 修回日期:2019-06-29 出版日期:2019-08-05 发布日期:2019-08-05
通讯作者: Weiwei Wang E-mail:wangweiwei@ahu.edu.cn
基金资助:
Project supported by the National Key Research and Development Program of China, (Grant No. 2017YFA0303201), the Key Research Program of Frontier Sciences, CAS, (Grant No. QYZDB-SSW-SLH009), the National Natural Science Foundation of China (Grant Nos. 51622105 and 11804343), the President Foundation of Hefei Institutes of Physical Science, CAS (Grant No. YZJJ2018QN15), and the Major/Innovative Program of Development Foundation of Hefei Center for Physical Science and Technology, (Grant No. 2016FXCX001).

Lorentz transmission electron microscopy for magnetic skyrmions imaging

Jin Tang(汤进)¹, Lingyao Kong(孔令尧)², Weiwei Wang(王伟伟)³, Haifeng Du(杜海峰)^1,3, Mingliang Tian(田明亮)^1,2

1 High Magnetic Field Laboratory, Chinese Academy of Sciences(CAS), Hefei 230031, China;
2 School of Physics and Materials Science, Anhui University, Hefei 230601, China;
3 Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China

Received:2019-05-17 Revised:2019-06-29 Online:2019-08-05 Published:2019-08-05
Contact: Weiwei Wang E-mail:wangweiwei@ahu.edu.cn
Supported by:
Project supported by the National Key Research and Development Program of China, (Grant No. 2017YFA0303201), the Key Research Program of Frontier Sciences, CAS, (Grant No. QYZDB-SSW-SLH009), the National Natural Science Foundation of China (Grant Nos. 51622105 and 11804343), the President Foundation of Hefei Institutes of Physical Science, CAS (Grant No. YZJJ2018QN15), and the Major/Innovative Program of Development Foundation of Hefei Center for Physical Science and Technology, (Grant No. 2016FXCX001).

摘要/Abstract

摘要： Magnetic skyrmions have interesting properties, including their small size, topological stability, and extremely low threshold current for current-driven motion. Therefore, they are regarded as promising candidates for next-generation magnetic memory devices. Lorentz transmission electron microscopy (TEM) has an ultrahigh magnetic domain resolution (~2 nm), it is thus an ideal method for direct real-space imaging of fine magnetic configurations of ultra-small skyrmions. In this paper, we describe the basic principles of Lorentz-TEM and off-axis electron holography and review recent experimental developments in magnetic skyrmion imaging using these two methods.

关键词: magnetic skyrmion, Lorentz transmission microscope, nanostructures

Abstract: Magnetic skyrmions have interesting properties, including their small size, topological stability, and extremely low threshold current for current-driven motion. Therefore, they are regarded as promising candidates for next-generation magnetic memory devices. Lorentz transmission electron microscopy (TEM) has an ultrahigh magnetic domain resolution (~2 nm), it is thus an ideal method for direct real-space imaging of fine magnetic configurations of ultra-small skyrmions. In this paper, we describe the basic principles of Lorentz-TEM and off-axis electron holography and review recent experimental developments in magnetic skyrmion imaging using these two methods.

Key words: magnetic skyrmion, Lorentz transmission microscope, nanostructures

中图分类号: (Magnetic properties of nanostructures)

75.75.-c

75.75.Fk (Domain structures in nanoparticles)

汤进, 孔令尧, 王伟伟, 杜海峰, 田明亮. Lorentz transmission electron microscopy for magnetic skyrmions imaging[J]. 中国物理B, 2019, 28(8): 87503-087503.

Jin Tang(汤进), Lingyao Kong(孔令尧), Weiwei Wang(王伟伟), Haifeng Du(杜海峰), Mingliang Tian(田明亮). Lorentz transmission electron microscopy for magnetic skyrmions imaging[J]. Chin. Phys. B, 2019, 28(8): 87503-087503.

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Lorentz transmission electron microscopy for magnetic skyrmions imaging

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