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Spin-orbit torque in Pt/CoNiCo/Pt symmetric devices

Yang, Meiyin; Cai, Kaiming; Ju, Hailang; Edmonds, K.W.; Yang, Guang; Liu, Shuai; Li, Baohe; Zhang, Bao; Sheng, Yu; Wang, Shouguo; Ji, Yang; Wang, Kaiyou

Authors

Meiyin Yang

Kaiming Cai

Hailang Ju

KEVIN EDMONDS kevin.edmonds@nottingham.ac.uk
Associate Professor & Reader in Physics

Guang Yang

Shuai Liu

Baohe Li

Bao Zhang

Yu Sheng

Shouguo Wang

Yang Ji

Kaiyou Wang



Abstract

Current induced magnetization switching by spin-orbit torques offers an energy-efficient means of writing information in heavy metal/ferromagnet (FM) multilayer systems. The relative contributions of field-like torques and damping-like torques to the magnetization switching induced by the electrical current are still under debate. Here, we describe a device based on a symmetric Pt/FM/Pt structure, in which we demonstrate a strong damping-like torque from the spin Hall effect and unmeasurable field-like torque from Rashba effect. The spin-orbit effective fields due to the spin Hall effect were investigated quantitatively and were found to be consistent with the switching effective fields after accounting for the switching current reduction due to thermal fluctuations from the current pulse. A non-linear dependence of deterministic switching of average Mzon the in-plane magnetic field was revealed, which could be explained and understood by micromagnetic simulation.

Citation

Yang, M., Cai, K., Ju, H., Edmonds, K., Yang, G., Liu, S., …Wang, K. (2016). Spin-orbit torque in Pt/CoNiCo/Pt symmetric devices. Scientific Reports, 6, https://doi.org/10.1038/srep20778

Journal Article Type Article
Acceptance Date Jan 12, 2016
Publication Date Feb 9, 2016
Deposit Date Mar 3, 2017
Publicly Available Date Mar 3, 2017
Journal Scientific Reports
Electronic ISSN 2045-2322
Publisher Nature Publishing Group
Peer Reviewed Peer Reviewed
Volume 6
DOI https://doi.org/10.1038/srep20778
Public URL https://nottingham-repository.worktribe.com/output/776770
Publisher URL http://www.nature.com/articles/srep20778

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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