Efficient current-induced magnetization reversal by spin-orbit torque in Pt/Co/Pt

Rowan-Robinson, R.M.; Hindmarch, A.T.; Atkinson, D.

Abstract

Current-induced magnetization reversal due to spin-orbit torque is demonstrated in an anisotropy controlled Pt/Co/Pt trilayer. The samples were designed to have weak perpendicular magnetic anisotropy, with a measured anisotropy field of (1340±20) Oe. Reversal is shown to be dominated by a damping-like torque associated with the spin-Hall effect. A small in-plane magnetic field was required to break the symmetry and enable reversal. With a 273 Oe field, magnetization reversal occurred with a current density amplitude of only 5×1010 A m−2, which is shown to be consistent with a simple model. The field-like torque is negligible, so measurements indicate that the imaginary part of the spin-mixing conductance associated with Co/Pt interfaces must be negligible.

Citation

Rowan-Robinson, R., Hindmarch, A., & Atkinson, D. (2018). Efficient current-induced magnetization reversal by spin-orbit torque in Pt/Co/Pt. Journal of Applied Physics, 124(18), Article 183901. https://doi.org/10.1063/1.5046503

• Journal Article Type: Article
• Acceptance Date: Oct 15, 2018
• Online Publication Date: Nov 8, 2018
• Publication Date: Nov 8, 2018
• Deposit Date: Nov 9, 2018
• Publicly Available Date: Nov 8, 2019
• Journal: Journal of Applied Physics
• Print ISSN: 0021-8979
• Electronic ISSN: 1089-7550
• Publisher: American Institute of Physics
• Peer Reviewed: Peer Reviewed
• Volume: 124
• Issue: 18
• Article Number: 183901
• DOI: https://doi.org/10.1063/1.5046503
• Public URL: https://durham-repository.worktribe.com/output/1313867