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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.

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


Authors

T.D. Skinner

M. Wang

A.W. Rushforth

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 1 nm, 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.

Citation

Skinner, T., Wang, M., Hindmarch, A., Rushforth, A., Irvine, A., Heiss, D., …Ferguson, A. (2014). Spin-orbit torque opposing the Oersted torque in ultrathin Co/Pt bilayers. Applied Physics Letters, 104(6), Article 062401. https://doi.org/10.1063/1.4864399

Journal Article Type Article
Acceptance Date Jan 24, 2014
Online Publication Date Feb 10, 2014
Publication Date Feb 10, 2014
Deposit Date Mar 21, 2014
Publicly Available Date Apr 4, 2014
Journal Applied Physics Letters
Print ISSN 0003-6951
Electronic ISSN 1077-3118
Publisher American Institute of Physics
Peer Reviewed Peer Reviewed
Volume 104
Issue 6
Article Number 062401
DOI https://doi.org/10.1063/1.4864399
Public URL https://durham-repository.worktribe.com/output/1435642

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Copyright Statement
© 2014 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. he following article appeared in Applied Physics Letters 104, 062401 (2014); doi: 10.1063/1.4864399 nd may be found at http://scitation.aip.org/content/aip/journal/apl/104/6/10.1063/1.4864399






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