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Spin-orbit torque opposing the Oersted torque in ultrathin Co/Pt bilayers

Skinner, T.D.; Wang, M.; Hindmarch, A.T.; Rushforth, A.W.; Irvine, A.C.; Heiss, D.; Kurebayashi, H.; Ferguson, A.J.

Authors

T.D. Skinner

M. Wang

A.T. Hindmarch

A.W. Rushforth Andrew.Rushforth@nottingham.ac.uk

A.C. Irvine

D. Heiss

H. Kurebayashi

A.J. Ferguson



Abstract

Current-induced torques in ultrathin Co/Pt bilayers were investigated using an electrically driven ferromagnetic resonance technique. The angle dependence of the resonances, detected by a rectification effect as a voltage, was analysed to determine the symmetries and relative magnitudes of the spin-orbit torques. Both anti-damping (Slonczewski) and field-like torques were observed. As the ferromagnet thickness was reduced from 3 to 1nm, the sign of the sum of the field-like torque and Oersted torque reversed. This observation is consistent with the emergence of a Rashba spin orbit torque in ultra-thin bilayers.

Journal Article Type Article
Journal Applied Physics Letters
Print ISSN 0003-6951
Electronic ISSN 1077-3118
Publisher AIP Publishing
Peer Reviewed Peer Reviewed
Volume 104
Issue 6
Article Number 062401
APA6 Citation Skinner, T., Wang, M., Hindmarch, A., Rushforth, A., Irvine, A., Heiss, D., …Ferguson, A. (in press). Spin-orbit torque opposing the Oersted torque in ultrathin Co/Pt bilayers. Applied Physics Letters, 104(6), doi:10.1063/1.4864399
DOI https://doi.org/10.1063/1.4864399
Publisher URL http://scitation.aip.org/content/aip/journal/apl/104/6/10.1063/1.4864399
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information Spin-orbit torque opposing the Oersted torque in ultrathin Co/Pt bilayers, T.D. Skinner, M. Wang, A.T. Hindmarch, A.W. Rushforth, A.C. Irvine, D. Heiss, H. Kurebayashi, and A.J. Ferguson. Applied Physics Letters 104, 062401 (2014). doi: 10.1063/1.4864399

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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