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

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

doi:10.1063/1.4916665

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

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

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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 language	English (US)
Article number	132404
Journal	Applied Physics Letters
Volume	106
Issue number	13
DOIs	https://doi.org/10.1063/1.4916665
State	Published - Mar 30 2015

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title = "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.",

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T1 - Spin Hall switching of the magnetization in Ta/TbFeCo structures with bulk perpendicular anisotropy

AU - Zhao, Zhengyang

AU - Jamali, Mahdi

AU - Smith, Angeline K.

AU - Wang, Jian Ping

PY - 2015/3/30

Y1 - 2015/3/30

N2 - 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.

AB - 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.

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

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