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 (15)

• Random-Matrix Theory of Quantum Transport
• Anatomy of Spin-Transfer Torque
• Finite-element theory of transport in ferromagnet-normal metal systems
• Non-collinear Magnetoelectronics
• The Role of Spin-Dependent Interface Scattering in Generating Current-Induced Torques in Magnetic Multilayers
• Spin Torques in Ferromagnetic/Normal Metal Structures
• Shaped angular dependence of the spin transfer torque and microwave generation without magnetic field
• Non-collinear spin transfer in Co/Cu/Co multilayers
• First-principles scattering matrices for spin-transport
• Magnetic exchange interaction induced by a Josephson current
• Universal angular magnetoresistance and spin torque in ferromagnetic/normal metal hybrids
• Ab-initio GMR and current-induced torques in Au/Cr multilayers
• Current-driven destabilization of both collinear configurations in asymmetric spin-valves
• Non-monotonic angular magnetoresistance 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 (17)

• Identification and selection rules of the spin-wave eigen-modes in a normally magnetized nano-pillar
• Spin-memory loss due to spin-orbit coupling at ferromagnet/heavy-metal interfaces: Ab initio spin-density matrix approach
• A unified drift-diffusion theory for transverse spin currents in spin valves, domain walls and other textured magnets
• Spin-torque driven ferromagnetic resonance in a nonlinear regime
• Nonlocal Spin Dynamics in the Crossover from Diffusive to Ballistic Transport
• Quantitative MRFM characterization of the autonomous and forced dynamics in a spin transfer nano-oscillator
• Control of spin current by a magnetic YIG substrate in NiFe/Al nonlocal spin valves
• Thermo-magnonic diode: rectification of energy and magnetization currents
• Multiscale approach to spin transport in magnetic multilayers
• Interplay between non equilibrium and equilibrium spin torque using synthetic ferrimagnets
• Control of the Oscillatory Interlayer Exchange Interaction with Terahertz Radiation
• Angular momentum transfer torques in spin valves with perpendicular magnetization
• Non-Equilibrium Green's Function based Circuit Models for Coherent Spin Devices
• Micromagnetic simulations of spin-torque driven magnetisation dynamics with spatially resolved spin transport and magnetisation texture
• Sustained RF oscillations from thermally induced spin-transfer torque
• Gate-dependent spin-torque in a nanoconductor-based spin-valve
• Nonlinear magnetotransport in dual spin valves