Journal
APPLIED PHYSICS LETTERS
Volume 104, Issue 6, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4864399
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Funding
- EPSRC [EP/H003487/1]
- Hitachi
- Royal Society Research [RG110616]
- EPSRC [EP/H003487/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/H003487/1] Funding Source: researchfish
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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. (C) 2014 AIP Publishing LLC.
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