Switching of a Magnet by Spin-Orbit Torque from a Topological Dirac Semimetal

Ding, Jinjun; Liu, Chuanpu; Kalappattil, Vijaysankar; Zhang, Yuejie; Mosendz, Oleksandr; Erugu, Uppalaiah; Yu, Rui; Tian, Jifa; DeMann, August; Field, Stuart B.; Yang, Xiaofei; Ding, Haifeng; Tang, Jinke; Terris, Bruce; Fert, Albert; Chen, Hua; Wu, Mingzhong

doi:10.1002/adma.202005909

Switching of a Magnet by Spin-Orbit Torque from a Topological Dirac Semimetal

Journal Article · Mon May 03 00:00:00 EDT 2021 · Advanced Materials

DOI:https://doi.org/10.1002/adma.202005909· OSTI ID:1780996

^[1]; ^[2]; Kalappattil, Vijaysankar ^[2]; Zhang, Yuejie ^[3]; Mosendz, Oleksandr ^[4]; Erugu, Uppalaiah ^[5]; Yu, Rui ^[6]; Tian, Jifa ^[5]; DeMann, August ^[2]; Field, Stuart B. ^[2]; Yang, Xiaofei ^[7]; Ding, Haifeng ^[8]; Tang, Jinke ^[5]; Terris, Bruce ^[4]; Fert, Albert ^[9]; Chen, Hua ^[2]; ^[2]

Colorado State Univ., Fort Collins, CO (United States); University of Wyoming
Colorado State Univ., Fort Collins, CO (United States)
Colorado State Univ., Fort Collins, CO (United States); Huazhong Univ. of Science and Technology, Wuhan (China)
Western Digital Corp., San Jose, CA (United States)
Univ. of Wyoming, Laramie, WY (United States)
Colorado State Univ., Fort Collins, CO (United States); Nanjing Univ. (China)
Huazhong Univ. of Science and Technology, Wuhan (China)
Nanjing Univ. (China)
Univ. Paris-Saclay, Palaiseau (France)

Recent experiments show that topological surface states (TSS) in topological insulators (TI) can be exploited to manipulate magnetic ordering in ferromagnets. In principle, TSS should also exist for other topological materials, but it remains unexplored as to whether such states can also be utilized to manipulate ferromagnets. In this paper, current-induced magnetization switching enabled by TSS in a non-TI topological material, namely, a topological Dirac semimetal α-Sn, is reported. The experiments use an α-Sn/Ag/CoFeB trilayer structure. The magnetization in the CoFeB layer can be switched by a charge current at room temperature, without an external magnetic field. The data show that the switching is driven by the TSS of the α-Sn layer, rather than spin-orbit coupling in the bulk of the α-Sn layer or current-produced heating. The switching efficiency is as high as in TI systems. This shows that the topological Dirac semimetal α-Sn is as promising as TI materials in terms of spintronic applications.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Wyoming, Laramie, WY (United States); University of Wyoming, Laramie, WY (United States)

Sponsoring Organization:: National Natural Science Foundation of China (NNSFC); National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0018994; SC0020074; SC0021281

OSTI ID:: 1780996

Alternate ID(s):: OSTI ID: 2335337
OSTI ID: 2335856
OSTI ID: 1781150

Journal Information:: Advanced Materials, Journal Name: Advanced Materials Journal Issue: 23 Vol. 33; ISSN 0935-9648

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Switching of a Magnet by Spin-Orbit Torque from a Topological Dirac Semimetal

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