Influence of spin-orbit and spin-Hall effects on the spin Seebeck current beyond linear response

Abstract

We study the spin transport theoretically in heterostructures consisting of a ferromagnetic metallic thin film sandwiched between heavy-metal and oxide layers. The spin current in the heavy metal layer is generated via the spin Hall effect, while the oxide layer induces at the interface with the ferromagnetic layer a spin-orbital coupling of the Rashba type. Impact of the spin Hall effect and Rashba spin-orbit coupling on the spin Seebeck current is explored with a particular emphasis on nonlinear effects. Technically, we employ the Fokker-Planck approach and contrast the analytical expressions with full numerical micromagnetic simulations. We show that when an external magnetic field is aligned parallel (antiparallel) to the Rashba field, the spin-orbit coupling enhances (reduces) the spin pumping current. In turn, the spin Hall effect and the Dzyaloshinskii-Moriya interaction are shown to increase the spin pumping current.

to appear in Phys. Rev. B

References in corpus (8)

• Theory of magnon-driven spin Seebeck effect
• Orbital mechanisms of electron spin manipulation by an electric field
• Thermal spin dynamics of yttrium iron garnet
• Current-induced motion of a transverse magnetic domain wall in the presence of spin Hall effect
• Thermally induced magnonic spin current, thermomagnonic torques and domain wall dynamics in the presence of Dzyaloshinskii-Moriya interaction
• Thermally induced magnon accumulation in two-sublattice magnets
• Conversion of electronic to magnonic spin current at heavy-metal magnetic-insulator interface
• Magnon cotunneling through a quantum dot

Cited by in corpus (2)

• Microscopic Origin of Spin-Orbit Torque in Ferromagnetic Heterostructures: A First Principles Approach
• Stratonovich-Ito integration scheme in ultrafast spin caloritronics