Journal
APPLIED PHYSICS LETTERS
Volume 106, Issue 13, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4916665
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Funding
- Center for Spintronic Materials, Interfaces and Novel Architectures (C-SPIN), one of six SRC STARnet Centers
- MARCO
- DARPA
- National Science Foundation [NSF NEB 1124831]
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1124831] Funding Source: National Science Foundation
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Spin-orbit torques are studied in Ta/TbFeCo/MgO patterned structures, where the ferrimagnetic material TbFeCo provides a strong bulk perpendicular magnetic anisotropy (bulk-PMA) independent of the interfaces. The current-induced magnetization switching in TbFeCo is investigated in the presence of a perpendicular, longitudinal, or transverse field. An unexpected partial-switching phenomenon is observed in the presence of a transverse field unique to our bulk-PMA material. It is found that the anti-damping torque related with spin Hall effect is very strong, and a spin Hall angle is determined to be 0.12. The field-like torque related with Rashba effect is unobservable, suggesting that the interface play a significant role in Rashba-like torque. (C) 2015 AIP Publishing LLC.
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