Electron Transport Driven by Nonequilibrium Magnetic Textures

Abstract

Spin-polarized electron transport driven by inhomogeneous magnetic dynamics is discussed in the limit of a large exchange coupling. Electron spins rigidly following the time-dependent magnetic profile experience spin-dependent fictitious electric and magnetic fields. We show that the electric field acquires important corrections due to spin dephasing, when one relaxes the spin-projection approximation. Furthermore, spin-flip scattering between the spin bands needs to be taken into account in order to calculate voltages and spin accumulations induced by the magnetic dynamics. A phenomenological approach based on the Onsager reciprocity principle is developed, which allows us to capture the effect of spin dephasing and make a connection to the well studied problem of current-driven magnetic dynamics. A number of results that recently appeared in the literature are related and generalized.

4 pages, 1 figure

References in corpus (5)

• Spin Transfer Torques
• Theory of current-driven magnetization dynamics in inhomogeneous ferromagnets
• Spin pumping by a field-driven domain wall
• Spin Pumping of Current in Non-Uniform Conducting Magnets
• Spin torque and force due to current for general spin textures

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• Broadband ferromagnetic resonance of Ni81Fe19 wires using a rectifying effect
• Thermoelectric spin transfer in textured magnets
• Effects of non-adiabaticity on the voltage generated by a moving domain wall
• Intrinsic Coupling between Current and Domain Wall Motion in (Ga,Mn)As
• Theory of spin magnetohydrodynamics
• Inverse Spin Hall Effect Driven by Spin Motive Force
• Charge pumping in magnetic tunnel junctions: Scattering theory
• Charge pumping and the colored thermal voltage noise in spin valves