Nonvolatile magnetization switching in a single-layer magnetic topological insulator

Communications Physics

Article

Xuming Luo¹  Guoqiang Yu¹  Yizhou Liu¹  Yang Liu²  Daiqiang Huang²  Yu Fu³  Qing Lin He³  Mengyun He³  Huimin Sun³  Yu Huang³  Wenjie Song⁴ 

[1] Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, 100190, Beijing, China;International Center for Quantum Materials, School of Physics, Peking University, 100871, Beijing, China;Collaborative Innovation Center of Quantum Matter, 100871, Beijing, China;International Center for Quantum Materials, School of Physics, Peking University, 100871, Beijing, China;Collaborative Innovation Center of Quantum Matter, 100871, Beijing, China;Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials, Peking University, 100871, Beijing, China;Songshan Lake Materials Laboratory, 523808, Dongguan, Guangdong, China;

关键词: ;   

DOI  :  10.1038/s42005-023-01349-z

 received in 2023-03-01, accepted in 2023-08-14,  发布年份 2023

来源: Springer

【 摘 要 】

Magnetization in a ferromagnetic layer could be manipulated by the spin-orbit torque whose generation commonly relies on the spin-orbit coupling from the adjacent heavy-metal layer within the bilayer. The fact that the magnetic topological insulator possesses both the ferromagnetic order with perpendicular anisotropy and inherent spin-orbit coupling inspires to realize such a torque-induced magnetization switching without forming any heterostructure with other materials. Here, only using a single layer of magnetically-doped topological insulator Cr:(Bi,Sb)2Te3, we realize a magnetization switching only by applying a large dc current. Assisted by the magnetic history, such a switching behaves nonvolatile under zero field but becomes volatile otherwise, as consistently shown by magnetoelectric transports and magneto-optical Kerr effect measurements. Static and quasistatic current are found to be equivalent for the switching. We propose that this switching may associate with the torque resulted from the spin-orbit coupling and the compositional asymmetry in the Cr-profile of the single layer.

【 授权许可】

CC BY   
© Springer Nature Limited 2023

【 图 表 】

Fig. 7

Fig. 3

Fig. 3

Fig. 2

Fig. 6

Fig. 3

Fig. 17

Fig. 2

Fig. 9

Fig. 1

Fig. 1

Figs. 1

Fig. 3

Fig. 7

Fig. 8

40854_2023_500_Article_IEq6.gif

Fig. 2

Fig. 5

Fig. 1

Fig. 1

Fig. 4

40538_2023_441_Article_IEq3.gif

Fig. 4

Fig. 4

Fig. 3

Fig. 3

Fig. 2

Fig. 2

Fig. 6

Fig. 1

Fig. 2

Fig. 5

Fig. 3

Fig. 3

Fig. 6

Fig. 2

Fig. 3

Fig. 2

Fig. 1

Fig. 1

Fig. 2

Fig. 4

Fig. 5

Fig. 3

Fig. 4

Fig. 7

Fig. 8

Fig. 3

Fig. 1

Fig. 2

Fig. 1

Fig. 4

Fig. 5

Fig. 1

Fig. 5

12862_2023_2133_Article_IEq130.gif

Fig. 3

Fig. 4

Fig. 6

Fig. 1

Fig. 2

Fig. 2

Fig. 1

Fig. 4

13690_2023_1147_Article_IEq20.gif

13690_2023_1147_Article_IEq19.gif

13690_2023_1147_Article_IEq18.gif

13690_2023_1147_Article_IEq16.gif

Fig. 3

13690_2023_1147_Article_IEq14.gif

Fig. 2

Fig. 1

Fig. 1

13690_2023_1147_Article_IEq11.gif

13690_2023_1147_Article_IEq10.gif

13690_2023_1147_Article_IEq9.gif

13690_2023_1147_Article_IEq8.gif

13690_2023_1147_Article_IEq7.gif

13690_2023_1147_Article_IEq6.gif

Fig. 2

13690_2023_1147_Article_IEq3.gif

13690_2023_1147_Article_IEq1.gif

Fig. 3

Fig. 1.

Fig. 1

Fig. 6

Fig. 3

Fig. 2

Fig. 3

Fig. 7

Fig. 5

Fig. 2

Fig. 4

Fig. 5

Fig. 1

12862_2023_2133_Article_IEq80.gif

Fig. 6

Fig. 2

Fig. 1

Fig. 1

Fig. 2

Fig. 2

Fig. 1

Fig. 1

Fig. 1

Fig. 1

Fig. 3

Fig. 1

12862_2023_2148_Article_IEq5.gif

Fig. 11

Fig. 4

Fig. 1

Fig. 3

Fig. 3

Fig. 2

Fig. 1

Fig. 6

Fig. 2

Fig. 6

Fig. 4

Fig. 7

Fig. 4

Fig. 2

Fig. 2

Fig. 1

Fig. 1

Fig. 1

Fig. 6

Fig. 3

Fig. 2

Fig. 3

Fig. 1

Fig. 1

13690_2023_1163_Article_IEq2.gif

13690_2023_1163_Article_IEq1.gif

Fig. 1

Fig. 4

Fig. 5

Fig. 3

Fig. 2

Fig. 3

Fig. 1

Fig. 1

Fig. 1

Fig. 2

Fig. 2

Fig. 4

Fig. 4

Fig. 6

Fig. 3

Fig. 5

12888_2023_5012_Article_IEq3.gif

Fig. 1

12888_2023_5012_Article_IEq2.gif

12888_2023_5113_Article_IEq7.gif

12888_2023_5113_Article_IEq6.gif

12888_2023_5113_Article_IEq5.gif

12888_2023_5113_Article_IEq4.gif

12888_2023_5113_Article_IEq3.gif

40517_2023_261_Article_IEq45.gif

Fig. 3

Fig. 1

Fig. 2

Fig. 3

Fig. 2

Fig. 2

Fig. 6

Fig. 7

Fig. 3

40798_2023_622_Article_IEq20.gif

40798_2023_622_Article_IEq19.gif

Fig. 1

Fig. 2

Fig. 4

41512_2023_153_Article_IEq93.gif

Fig. 2

13731_2023_311_Article_IEq7.gif

13690_2023_1151_Article_IEq22.gif

13690_2023_1151_Article_IEq4.gif

Fig. 1

40517_2023_266_Article_IEq41.gif

Fig. 3

Fig. 1