Self-consistent calculation of spin transport and magnetization dynamics
arXiv:1305.5087 · doi:10.1016/j.physrep.2013.05.006
Abstract
A spin-polarized current transfers its spin-angular momentum to a local magnetization, exciting current-induced magnetization dynamics. So far, most studies in this field have focused on the direct effect of spin transport on magnetization dynamics, but ignored the feedback from the magnetization dynamics to the spin transport and back to the magnetization dynamics. Although the feedback is usually weak, there are situations when it can play an important role in the dynamics. In such situations, self-consistent calculations of the magnetization dynamics and the spin transport can accurately describe the feedback. This review describes in detail the feedback mechanisms, and presents recent progress in self-consistent calculations of the coupled dynamics. We pay special attention to three representative examples, where the feedback generates non-local effective interactions for the magnetization. Possibly the most dramatic feedback example is the dynamic instability in magnetic nanopillars with a single magnetic layer. This instability does not occur without non-local feedback. We demonstrate that full self-consistent calculations generate simulation results in much better agreement with experiments than previous calculations that addressed the feedback effect approximately. The next example is for more typical spin valve nanopillars. Although the effect of feedback is less dramatic because even without feedback the current can induce magnetization oscillation, the feedback can still have important consequences. For instance, we show that the feedback can reduce the linewidth of oscillations, in agreement with experimental observations. Finally, we consider nonadiabatic electron transport in narrow domain walls. The non-local feedback in these systems leads to a significant renormalization of the effective nonadiabatic spin transfer torque.
accepted in Physics Reports (76 pages, 15 figures)
References in corpus (31)
- Spin Transfer Torques
- Dynamics of Dzyaloshinskii domain walls in ultrathin magnetic films
- Current induced torques and interfacial spin-orbit coupling: Semiclassical Modeling
- Microscopic approach to current-driven domain wall dynamics
- Identification of the dominant precession damping mechanism in Fe, Co, and Ni by first-principles calculations
- Non-collinear Magnetoelectronics
- Electrical detection of spin pumping due to the precessing magnetization of a single ferromagnet
- Thermal Spin-Transfer Torques in Magnetoelectronic Devices
- Anomalous Bias Dependence of Spin Torque in Magnetic Tunnel Junctions
- Excitations of incoherent spin-waves due to spin-transfer torque
- Current-induced domain wall motion in a nanowire with perpendicular magnetic anisotropy
- Current-induced domain wall motion in Rashba spin-orbit system
- Generation linewidth of an auto-oscillator with a nonlinear frequency shift: Spin-torque nano-oscillator
- Thermoelectric Effects in Magnetic Nanostructures
- Electron Transport Driven by Nonequilibrium Magnetic Textures
- Ab initio studies of the spin-transfer torque in tunnel junctions
- Current-induced magnetization switching in MgO barrier based magnetic tunnel junctions with CoFeB/Ru/CoFeB synthetic ferrimagnetic free layer
- Theory of current-driven magnetization dynamics in inhomogeneous ferromagnets
- Large-amplitude coherent spin waves exited by spin-polarized current in nanoscale spin valves
- Current-induced magnetization switching in MgO barrier magnetic tunnel junctions with CoFeB based synthetic ferrimagnetic free layers
- Lineshape distortion in a nonlinear auto-oscillator near generation threshold: Application to spin-torque nano-oscillators
- Spin Pumping of Current in Non-Uniform Conducting Magnets
- Spin torque and force due to current for general spin textures
- Adiabatic Domain Wall Motion and Landau-Lifshitz Damping
- Voltage generation by ferromagnetic resonance
- Feasibility Study of Logic Circuits with Spin Wave Bus
- Spin motive force induced by Rashba interaction in the strong sd coupling regime
- Spin wave assisted current induced magnetic domain wall motion
- Thermoelectric spin transfer in textured magnets
- Effects of non-adiabaticity on the voltage generated by a moving domain wall
- Micromagnetic simulations of persistent oscillatory modes excited by spin-polarized current in nanoscale exchange-biased spin valves
Cited by in corpus (13)
- Direct and inverse spin-orbit torques
- Giant nonreciprocal emission of spin waves in Ta/Py bilayers
- Spin and charge pumping by steady or pulse current-driven magnetic domain wall: A self-consistent multiscale time-dependent-quantum/time-dependent-classical approach
- Enhanced Non-Adiabaticity in Vortex Cores due to the Emergent Hall Effect
- Magnon versus electron mediated spin-transfer torque exerted by spin currents across antiferromagnetic insulator to switch magnetization of adjacent ferromagnetic metal
- Spin transparency for an interface of an ultrathin magnet within the spin dephasing length
- Roles of chiral renormalization on magnetization dynamics in chiral magnets
- Domain wall dynamics in easy-cone magnets
- Numerical Computation of Spin-Transfer Torques for Antiferromagnetic Domain walls
- Stabilizing current-driven steady flows of 180 domain walls in spin valves by interfacial Dzyaloshinskii-Moriya interaction
- Kinetic theory of spin-polarized systems in electric and magnetic fields with spin-orbit coupling: II. RPA response functions and collective modes
- Interacting Dirac magnons in the van der Waals ferromagnet CrBr
- Slonczewski-spin-current driven dynamics of 180 domain walls in spin valves with interfacial Dzyaloshinskii-Moriya interaction