Spin Hall switching of the magnetization in Ta/TbFeCo structures with bulk perpendicular anisotropy
Abstract
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 30, 2015
- Source ID
- 10.1063/1.4916665
Entities
People
- Angeline K. Smith
- Jian-Ping Wang
- Mahdi Jamali
- Zhengyang Zhao
Organizations
- Defense Advanced Research Projects Agency
- National Science Foundation
- Semiconductor Research Corporation
- University of Minnesota