中国物理B ›› 2023, Vol. 32 ›› Issue (2): 27505-027505.doi: 10.1088/1674-1056/aca604

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Magnetic triangular bubble lattices in bismuth-doped yttrium iron garnet

Tao Lin(蔺涛)1, Chengxiang Wang(王承祥)1, Zhiyong Qiu(邱志勇)2,3, Chao Chen(陈超)1, Tao Xing(邢弢)1, Lu Sun(孙璐)4,5, Jianhui Liang(梁建辉)4, Yizheng Wu(吴义政)4, Zhong Shi(时钟)6, and Na Lei(雷娜)1,†   

  1. 1 Fert Beijing Institute, MIIT Key Laboratory of Spintronics, School of Integrated Circuit Science and Engineering, Beihang University, Beijing, 100191, China;
    2 Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams(Ministry of Education), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;
    3 Key Laboratory of Energy Materials and Devices(Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;
    4 Department of Physics and State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433, China;
    5 School of Information Science and Technology, Shanghai Technology University, Shanghai 201210, China;
    6 Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology&Pohl Institute of Solid State Physics, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
  • 收稿日期:2022-10-14 修回日期:2022-11-09 接受日期:2022-11-25 出版日期:2023-01-10 发布日期:2023-01-10
  • 通讯作者: Na Lei E-mail:na.lei@buaa.edu.cn
  • 基金资助:
    N. L. acknowledges support by the National Natural Science Foundation of China (Grant Nos. 52061135105 and 12074025). Y. W. acknowledges support by the National Natural Science Foundation of China (Grant Nos. 11974079, 12274083, and 12221004), and the Shanghai Municipal Science and Technology Basic Research Project (Grant No. 22JC1400200).

Magnetic triangular bubble lattices in bismuth-doped yttrium iron garnet

Tao Lin(蔺涛)1, Chengxiang Wang(王承祥)1, Zhiyong Qiu(邱志勇)2,3, Chao Chen(陈超)1, Tao Xing(邢弢)1, Lu Sun(孙璐)4,5, Jianhui Liang(梁建辉)4, Yizheng Wu(吴义政)4, Zhong Shi(时钟)6, and Na Lei(雷娜)1,†   

  1. 1 Fert Beijing Institute, MIIT Key Laboratory of Spintronics, School of Integrated Circuit Science and Engineering, Beihang University, Beijing, 100191, China;
    2 Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams(Ministry of Education), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;
    3 Key Laboratory of Energy Materials and Devices(Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;
    4 Department of Physics and State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433, China;
    5 School of Information Science and Technology, Shanghai Technology University, Shanghai 201210, China;
    6 Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology&Pohl Institute of Solid State Physics, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
  • Received:2022-10-14 Revised:2022-11-09 Accepted:2022-11-25 Online:2023-01-10 Published:2023-01-10
  • Contact: Na Lei E-mail:na.lei@buaa.edu.cn
  • Supported by:
    N. L. acknowledges support by the National Natural Science Foundation of China (Grant Nos. 52061135105 and 12074025). Y. W. acknowledges support by the National Natural Science Foundation of China (Grant Nos. 11974079, 12274083, and 12221004), and the Shanghai Municipal Science and Technology Basic Research Project (Grant No. 22JC1400200).

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摘要： Magnetic bubbles have again become a subject of significant attention following the experimental observation of topologically nontrivial magnetic skyrmions. In recent work, tailoring the shape of the bubbles is considered a key factor for their dynamics in spintronic devices. In addition to the reported circular, elliptical, and square bubbles, here we observe triangular bubble domains in bismuth-doped yttrium iron garnet (Bi-YIG) using Kerr microscopy. The bubble domains evolve from discrete circular to latticed triangular and hexagonal shapes. Further, the orientation of the triangular bubbles in the hexagonal lattices can be flipped by decreasing the magnetic field. The sixfold in-plane magnetic anisotropy of Bi-YIG(111) crystal, which is presumably the mechanism underlying the triangular shape of the bubbles, is measured as 1179 erg/cm3. The study of the morphologies of topologically trivial bubbles in YIG offers insight into nontrivial spin textures, which is appealing for future spintronic applications.

关键词: magnetic bubble, yttrium iron garnet, Kerr microscopy, spintronics

Abstract: Magnetic bubbles have again become a subject of significant attention following the experimental observation of topologically nontrivial magnetic skyrmions. In recent work, tailoring the shape of the bubbles is considered a key factor for their dynamics in spintronic devices. In addition to the reported circular, elliptical, and square bubbles, here we observe triangular bubble domains in bismuth-doped yttrium iron garnet (Bi-YIG) using Kerr microscopy. The bubble domains evolve from discrete circular to latticed triangular and hexagonal shapes. Further, the orientation of the triangular bubbles in the hexagonal lattices can be flipped by decreasing the magnetic field. The sixfold in-plane magnetic anisotropy of Bi-YIG(111) crystal, which is presumably the mechanism underlying the triangular shape of the bubbles, is measured as 1179 erg/cm3. The study of the morphologies of topologically trivial bubbles in YIG offers insight into nontrivial spin textures, which is appealing for future spintronic applications.

Key words: magnetic bubble, yttrium iron garnet, Kerr microscopy, spintronics

中图分类号:  (Domain structure (including magnetic bubbles and vortices))

  • 75.70.Kw
75.30.Gw (Magnetic anisotropy) 75.60.-d (Domain effects, magnetization curves, and hysteresis)