Spin torque and waviness in magnetic multilayers: a bridge between Valet-Fert theory and quantum approaches

Abstract

We develop a simple theoretical framework for transport in magnetic multilayers, based on Landauer-Buttiker scattering formalism and Random Matrix Theory. A simple transformation allows one to go from the scattering point of view to theories expressed in terms of local currents and electrochemical potential. In particular, our theory can be mapped onto the well established classical Valet Fert theory for collinear systems. For non collinear systems, in the absence of spin-flip scattering, our theory can be mapped onto the generalized circuit theory. We apply our theory to the angular dependance of spin accumulation and spin torque in non-collinear spin valves.

References in corpus (4)

• Non-collinear Magnetoelectronics
• Ab-initio GMR and current-induced torques in Au/Cr multilayers
• Current-driven destabilization of both collinear configurations in asymmetric spin-valves
• Correlation of the angular dependence of spin-transfer torque and giant magnetoresistance in the limit of diffusive transport in spin valves

Cited by in corpus (1)

• Spin-torque driven ferromagnetic resonance in a nonlinear regime