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

Journal Article · Mon Feb 10 04:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4864399· OSTI ID:22283190

Irvine, A. C.; Heiss, D.; Kurebayashi, H.; Wang, M.; Hindmarch, A. T.; Rushforth, A. W. ^[1]

---

1. School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD (United Kingdom)

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.

• OSTI ID: 22283190
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 6 Vol. 104; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COBALT
DAMPING
ELECTRIC CURRENTS
ELECTRIC POTENTIAL
FERROMAGNETIC MATERIALS
FERROMAGNETIC RESONANCE
FERROMAGNETISM
INTERFACES
LAYERS
ORBITS
PLATINUM
SPIN
SYMMETRY
THICKNESS
TORQUE