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.
A.W. Rushforth Andrew.Rushforth@nottingham.ac.uk
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|
|Peer Reviewed||Peer Reviewed|
|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|
|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|
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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