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

Skinner, T. D. and Wang, M. and Hindmarch, A. T. and Rushforth, A. W. and Irvine, A. C. and Heiss, D. and Kurebayashi, H. and Ferguson, A. J. (2014) Spin-orbit torque opposing the Oersted torque in ultrathin Co/Pt bilayers. Applied Physics Letters, 104 (6). 062401/1-062401/4. ISSN 0003-6951

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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.

Item Type: Article
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
Schools/Departments: University of Nottingham UK Campus > Faculty of Science > School of Physics and Astronomy
Identification Number: https://doi.org/10.1063/1.4864399
Depositing User: Rushforth, Andrew
Date Deposited: 23 Jun 2016 12:44
Last Modified: 13 Sep 2016 13:49
URI: http://eprints.nottingham.ac.uk/id/eprint/34353

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