Speaker
Dr
Clement Wong
(UCLA)
Description
We develop 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 a dissipative force generated by magnetization
dynamics and the Onsager 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.
Applying our hydrodynamic equations to soliton dynamics, we
find that soliton motion generate electrical currents,
which produce back-action through spin torques. As an
example, we consider vortex gyration in a point-contact spin
valve, and find modifications to orbit radius, frequency,
and dissipation power.
Primary author
Dr
Clement Wong
(UCLA)
