Abstract
We have developed the hydrodynamic theory of collinear spin currents coupled to magnetization dynamics in spin-textured, metallic ferromagnets. Our semi-phenomenological theory captures a wide range of magneto-electric phenomena, including the dissipative spin-motive force generated by magnetization dynamics and the reciprocal "beta" spin torque. Furthermore, we find that electronic dynamics gives rise to a non-local Gilbert damping tensor in the Landau-Lifshitz-Gilbert equation for the magnetization.
Appling our hydrodynamic equations to soliton dynamics, we find that soliton motion generate electrical currents, which produce backaction through spin torques. We include such effects in the solitonic equations of motion for collective coordinates. As an example, we consider the orbital motion of a vortex in a point-contact spin valve, and find modifications to orbit radius, frequency, and dissipation power.
Coffee and tea will be served 20 minutes prior to the seminar.