Semirealistic tight-binding model for spin-orbit torques

Nanowire spin torque oscillator driven by spin orbit torques.

Spin torque from spin current applied to a nanoscale region of a ferromagnet can act as negative magnetic damping and thereby excite self-oscillations of its magnetization. In contrast, spin torque uniformly applied to the magnetization of an extended ferromagnetic film does not generate self-oscillatory magnetic dynamics but leads to reduction of the saturation magnetization. Here we report st...

Spin-orbit torques in two-dimensional Rashba ferromagnets

Enhanced spin-orbit torques in Pt/Co/Ta heterostructures

Spin-orbit torques (SOTs) are studied in perpendicularly magnetized ultrathin Co films sandwiched between two heavy metals, Pt and Ta. A significant enhancement of the Slonczewski-like torque is achieved by placing dissimilar metals with opposite spin Hall angles on opposite sides of the ferromagnet. SOTs were characterized through harmonic measurements and the contribution by the Ta overlayer ...

Current-induced torques in the presence of spin-orbit coupling.

In systems with strong spin-orbit coupling, the relationship between spin transfer torque and the divergence of the spin current is generalized to a relation between spin transfer torques, total angular momentum current, and mechanical torques. In ferromagnetic semiconductors, where the spin-orbit coupling is large, these considerations modify the behavior of the spin transfer torques. One exam...

Current induced torques and interfacial spin-orbit coupling: Semiclassical modeling

Paul M. Haney,1 Hyun-Woo Lee,2 Kyung-Jin Lee,1,3,4,5 Aurélien Manchon,6 and M. D. Stiles1 1Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6202, USA 2PCTP and Department of Physics, Pohang University of Science and Technology, Kyungbuk 790-784, Korea 3Department of Materials Science & Engineering, Korea University, Seoul ...