Spin-orbit torque and spin Hall magnetoresistance in Pt/Co/Ru/AlOx multilayers with modifying spin transport at interfaces

We report the spin-orbit torque and spin Hall magnetoresistance (SMR) in Pt/Co/Ru/AlOx multilayers with modifying spin transport at interfaces. Through current induced magnetization switching and harmonic measurements, we have found that the switching current is decreased and the damping-like effect...

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Bibliographic Details
Published in:Physica scripta 2019-08, Vol.94 (8)
Main Authors: Wu, Yunchen, Meng, Kangkang, Liu, Qianbiao, Zheng, Shiqi, Miao, Jun, Xu, Xiaoguang, Jiang, Yong
Format: Article
Language:English
Subjects:
spin transport in metals
spin-orbit coupling
spin-orbit torques
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Summary:We report the spin-orbit torque and spin Hall magnetoresistance (SMR) in Pt/Co/Ru/AlOx multilayers with modifying spin transport at interfaces. Through current induced magnetization switching and harmonic measurements, we have found that the switching current is decreased and the damping-like effective field is enhanced after inserting Ru layer in Pt/Co/AlOx multilayers. This variation is firstly ascribed to the enhancement of the spin accumulation at the Co/Ru interfaces as discussed in our previous work. Then, the temperature dependence of the SMR in Pt/Co/AlOx and Pt/Co/Ru/AlOx multilayers has been compared. The unexpected temperature dependence of SMR in Pt/Co/Ru/AlOx multilayers is suggested to be the interfacial-generated spin current that transverse into Pt.
ISSN:0031-8949
1402-4896
DOI:10.1088/1402-4896/ab149a