Spin-Motive Forces and Current-Induced Torques in Ferromagnets

Abstract

In metallic ferromagnets, the spin-transfer torque and spin-motive force are known to exhibit a reciprocal relationship. Recent experiments on ferromagnets with strong spin-orbit coupling have revealed a rich complexity in the interaction between itinerant charge carriers and magnetization, but a full understanding of this coupled dynamics is lacking. Here, we develop a general phenomenology of the two reciprocal processes of charge pumping by spin-motive forces and current-driven magnetization dynamics. The formalism is valid for spin-orbit coupling of any strength and presents a systematic scheme for deriving all possible torque and charge-pumping terms that obey the symmetry requirements imposed by the point group of the system. We demonstrate how the different charge pumping and torque contributions are connected via the Onsager reciprocal relations. The formalism is applied to two important classes of systems: isotropic ferromagnets with non-uniform magnetization and homogeneous ferromagnets described by the point group $C_{2v}$.

Final version accepted by Physical Review B

References in corpus (10)

• Spin Transfer Torques
• Dynamics of domain walls in magnetic nanostrips
• Current-induced domain wall motion in Rashba spin-orbit system
• Electron Transport Driven by Nonequilibrium Magnetic Textures
• Spin pumping by a field-driven domain wall
• Magnonic Charge Pumping via Spin-Orbit Coupling
• Spin motive force induced by Rashba interaction in the strong sd coupling regime
• Effects of non-adiabaticity on the voltage generated by a moving domain wall
• Inverse Spin Hall Effect Driven by Spin Motive Force
• Charge current driven by spin dynamics in disordered Rashba spin-orbit system

Cited by in corpus (6)

• Current Control of Magnetism in Two-Dimensional Fe3GeTe2
• Theory for spin torque in Weyl semimetal with magnetic texture
• Intrinsic and extrinsic tunability of Rashba spin-orbit coupled emergent inductors
• Boundary-Driven Twist States in Systems with Broken Spatial Inversion Symmetry
• Twists in Ferromagnetic Monolayers With Trigonal Prismatic Symmetry
• Electrically-driven domain wall motion in a ferromagnetic Kagome lattice