Spin Hall switching of the magnetization in Ta/TbFeCo structures with bulk perpendicular anisotropy

Zhengyang Zhao, Mahdi Jamali, Angeline K. Smith, Jian Ping Wang

Research output: Contribution to journalArticle

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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.

Original languageEnglish (US)
Article number132404
JournalApplied Physics Letters
Volume106
Issue number13
DOIs
StatePublished - Mar 30 2015

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