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Chin. Phys. B, 2021, Vol. 30(2): 027505    DOI: 10.1088/1674-1056/abd693

Evolution of domain structure in Fe3GeTe2

Siqi Yin(尹思琪)1, Le Zhao(赵乐)2, Cheng Song(宋成)1,†, Yuan Huang(黄元)3, Youdi Gu(顾有地)1, Ruyi Chen(陈如意)1, Wenxuan Zhu(朱文轩)1, Yiming Sun(孙一鸣)1, Wanjun Jiang(江万军)2, Xiaozhong Zhang(章晓中)1,‡, and Feng Pan(潘峰)1
1 Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China; 2 State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing 100084, China; 3 Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Abstract  Two-dimensional (2D) magnets provide an ideal platform to explore new physical phenomena in fundamental magnetism and to realize the miniaturization of magnetic devices. The study on its domain structure evolution with thickness is of great significance for better understanding the 2D magnetism. Here, we investigate the magnetization reversal and domain structure evolution in 2D ferromagnet Fe3GeTe2 (FGT) with a thickness range of 11.2-112 nm. Three types of domain structures and their corresponding hysteresis loops can be obtained. The magnetic domain varies from a circular domain via a dendritic domain to a labyrinthian domain with increasing FGT thickness, which is accompanied by a transition from squared to slanted hysteresis loops with reduced coercive fields. These features can be ascribed to the total energy changes from exchange interaction-dominated to dipolar interaction-dominated with increasing FGT thickness. Our finding not only enriches the fundamental magnetism, but also paves a way towards spintronics based on 2D magnet.
Keywords:  Fe3GeTe2      two-dimensional magnet      thickness dependent domain structure  
Received:  20 November 2020      Revised:  15 December 2020      Accepted manuscript online:  24 December 2020
PACS:  75.70.Ak (Magnetic properties of monolayers and thin films)  
  75.70.Kw (Domain structure (including magnetic bubbles and vortices))  
Fund: Project supported by the National Key R&D Program of China (Grant Nos. 2017YFA0206202 and 2019YFA0308000), the National Natural Science Foundation of China (Grant Nos. 51871130, 62022089, and 11874405), and the Youth Innovation Promotion Association of Chinese Academy of Sciences (Grant No. 2019007).
Corresponding Authors:  Corresponding author. E-mail: Corresponding author. E-mail:   

Cite this article: 

Siqi Yin(尹思琪), Le Zhao(赵乐), Cheng Song(宋成), Yuan Huang(黄元), Youdi Gu(顾有地), Ruyi Chen(陈如意), Wenxuan Zhu(朱文轩), Yiming Sun(孙一鸣), Wanjun Jiang(江万军), Xiaozhong Zhang(章晓中), and Feng Pan(潘峰) Evolution of domain structure in Fe3GeTe2 2021 Chin. Phys. B 30 027505

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