Spin-orbit torque from a ferromagnetic metal
Abstract
The switching of magnetization by current-induced spin-orbit torque (SOT) has potential applications for energy-efficient spintronic devices. In the past, most conventional works have been focused on SOT in heavy metals. Here the SOT from a ferromagnetic metal is investigated, and two mechanisms of the field-free SOT induced magnetization switching are demonstrated to be from the interlayer exchange coupling and the tilted perpendicular magnetic anisotropy. We exclude the spin torque contribution from the anomalous Hall effect and the interfacial Rashba effect combined with spin precession. A spin Hall angle θSH = –0.022 of CoFeB is obtained by the current-induced hysteresis loop shift method, and the obtained θSH is comparable with heavy metals. This work demonstrates that a considerable SOT can come from a ferromagnetic metal, and indicates the unconventional origin of spin-orbit coupling.
- Authors:
-
- Univ. of California, Los Angeles, CA (United States)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES); Univ. of California, Riverside, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1611919
- Alternate Identifier(s):
- OSTI ID: 1510833
- Grant/Contract Number:
- SC0012670
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 99; Journal Issue: 18; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Materials Science; Physics; Exchange interaction; Magnetization switching; Spin torque; Spin-orbit coupling; Spintronics; Ferromagnets; Hall bar; Magnetization measurements
Citation Formats
Wu, Hao, Razavi, Seyed Armin, Shao, Qiming, Li, Xiang, Wong, Kin L., Liu, Yuxiang, Yin, Gen, and Wang, Kang L. Spin-orbit torque from a ferromagnetic metal. United States: N. p., 2019.
Web. doi:10.1103/physrevb.99.184403.
Wu, Hao, Razavi, Seyed Armin, Shao, Qiming, Li, Xiang, Wong, Kin L., Liu, Yuxiang, Yin, Gen, & Wang, Kang L. Spin-orbit torque from a ferromagnetic metal. United States. https://doi.org/10.1103/physrevb.99.184403
Wu, Hao, Razavi, Seyed Armin, Shao, Qiming, Li, Xiang, Wong, Kin L., Liu, Yuxiang, Yin, Gen, and Wang, Kang L. Mon .
"Spin-orbit torque from a ferromagnetic metal". United States. https://doi.org/10.1103/physrevb.99.184403. https://www.osti.gov/servlets/purl/1611919.
@article{osti_1611919,
title = {Spin-orbit torque from a ferromagnetic metal},
author = {Wu, Hao and Razavi, Seyed Armin and Shao, Qiming and Li, Xiang and Wong, Kin L. and Liu, Yuxiang and Yin, Gen and Wang, Kang L.},
abstractNote = {The switching of magnetization by current-induced spin-orbit torque (SOT) has potential applications for energy-efficient spintronic devices. In the past, most conventional works have been focused on SOT in heavy metals. Here the SOT from a ferromagnetic metal is investigated, and two mechanisms of the field-free SOT induced magnetization switching are demonstrated to be from the interlayer exchange coupling and the tilted perpendicular magnetic anisotropy. We exclude the spin torque contribution from the anomalous Hall effect and the interfacial Rashba effect combined with spin precession. A spin Hall angle θSH = –0.022 of CoFeB is obtained by the current-induced hysteresis loop shift method, and the obtained θSH is comparable with heavy metals. This work demonstrates that a considerable SOT can come from a ferromagnetic metal, and indicates the unconventional origin of spin-orbit coupling.},
doi = {10.1103/physrevb.99.184403},
journal = {Physical Review B},
number = 18,
volume = 99,
place = {United States},
year = {Mon May 06 00:00:00 EDT 2019},
month = {Mon May 06 00:00:00 EDT 2019}
}
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Works referencing / citing this record:
Structural, magnetostatic, and magnetodynamic studies of Co/Mo-based uncompensated synthetic antiferromagnets
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