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Spin-transfer torques (STT), Gilbert damping (GD), and effective spinrenormalization (ESR) are investigated microscopically in a 2D Rashbaferromagnet with spin-independent Gaussian white-noise disorder. Rashbaspin-orbit coupling induced anisotropy of these phenomena is thoroughlyanalysed. For the case of two partly filled spin subbands, a remarkablerelation between the anisotropic STT, GD, and ESR is established. In theabsence of magnetic field and other torques on magnetization, this relationcorresponds to a current-induced motion of a magnetic texture with theclassical drift velocity of conduction electrons. Finally, we compute spinsusceptibility of the system and generalize the notion of spin-polarizedcurrent.

Anisotropy of spin-transfer torques and Gilbert damping induced by Rashba coupling