Platinum composition dependence of spin-orbit torque in (Fe0.8Mn0.2)1−xPtx single-layer ferromagnet

We have investigated the effect of the Pt composition on the spin–orbit torque in a (Fe0.8Mn0.2)1−xPtx single-layer ferromagnet. We observed that while the field-like torque decreases and even reverses sign with increasing the Pt composition, the damping-like torque increases monotonically and reach...

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Bibliographic Details
Published in:Applied physics letters 2020-10, Vol.117 (17)
Main Authors: Luo, Ziyan, Lu, Ling, Xie, Hang, Xu, Yanjun, Chen, Xin, Talapatra, Abhishek, Adeyeye, Adekunle Olusola, Hua, Younan, Li, Xiaomin, Wu, Yihong
Format: Article
Language:English
Subjects:
Applied physics
Composition effects
Damping
Ferromagnetism
Hall effect
Platinum
Torque
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Summary:We have investigated the effect of the Pt composition on the spin–orbit torque in a (Fe0.8Mn0.2)1−xPtx single-layer ferromagnet. We observed that while the field-like torque decreases and even reverses sign with increasing the Pt composition, the damping-like torque increases monotonically and reaches 0.99 Oe / ( 10 10   A / m 2 ) in a single-layer (Fe0.8Mn0.2)0.52Pt0.48 film. The results corroborate the anomalous Hall effect and surface spin rotation model presented previously, and the relative ratio between the damping-like and field-like torques can be qualitatively understood as the relative phase change in spin-conserving and spin-flip scattering.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0023957