Effect of spin diffusion on current generated by spin motive force

Abstract

Spin motive force is a spin-dependent force on conduction electrons induced by magnetization dynamics. In order to examine its effects on magnetization dynamics, it is indispensable to take into account spin accumulation, spin diffusion, and spin-flip scattering since the spin motive force is in general nonuniform. We examine the effects of all these on the way the spin motive force generates the charge and spin currents in conventional situations, where the conduction electron spin relaxation dynamics is much faster than the magnetization dynamics. When the spin-dependent electric field is spatially localized, which is common in experimental situations, we find that the conservative part of the spin motive force is unable to generate the charge current due to the cancelation effect by the diffusion current. We also find that the spin current is a nonlocal function of the spin motive force and can be effectively expressed in terms of nonlocal Gilbert damping tensor. It turns out that any spin independent potential such as Coulomb potential does not affect our principal results. At the last part of this paper, we apply our theory to current-induced domain wall motion.

14 pages, 2 figures, some of important errors were corrected but we recommend to see PRB paper if one can access

References in corpus (8)

• Current-induced domain wall motion in a nanowire with perpendicular magnetic anisotropy
• Electron Transport Driven by Nonequilibrium Magnetic Textures
• Threshold Current of Domain Wall Motion under Extrinsic Pinning, $\beta$-Term and Non-Adiabaticity
• Spin Pumping of Current in Non-Uniform Conducting Magnets
• Adiabatic Domain Wall Motion and Landau-Lifshitz Damping
• Effects of non-adiabaticity on the voltage generated by a moving domain wall
• Theory of spin magnetohydrodynamics
• Inverse Spin Hall Effect Driven by Spin Motive Force

Cited by in corpus (8)

• Magnetization dynamics induced by in-plane currents in ultrathin magnetic nanostructures
• Prediction of Giant Spin Motive Force due to Rashba Spin-Orbit Coupling
• Unbalanced Holographic Superconductors and Spintronics
• Self-consistent calculation of spin transport and magnetization dynamics
• Spin and charge transport induced by gauge fields in a ferromagnet
• Roles of chiral renormalization on magnetization dynamics in chiral magnets
• Topological Hall effect in diffusive ferromagnetic thin films with spin-flip scattering
• Spin-motive force due to domain wall motion in the presence of Dzyaloshinskii-Moriya Interaction