Current-induced dynamics of composite free layer with antiferromagnetic interlayer exchange coupling
arXiv:1102.1028 · doi:10.1103/PhysRevB.83.104422
Abstract
Current-induced dynamics in spin valves including composite free layer with antiferromagnetic interlayer exchange coupling is studied theoretically within the diffusive transport regime. We show that current-induced dynamics of a synthetic antiferromagnet is significantly different from dynamics of a synthetic ferrimagnet. From macrospin simulations we obtain conditions for switching the composite free layer, as well as for appearance of various self-sustained dynamical modes. Numerical simulations are compared with simple analytical models of critical current based on linearized Landau-Lifshitz-Gilbert equation.
11 pages, 7 figures
References in corpus (6)
- Current-driven destabilization of both collinear configurations in asymmetric spin-valves
- Stochastic theory of spin-transfer oscillator linewidths
- Strategies and tolerances of spin transfer torque switching
- Co-resonant enhancement of spin-torque critical currents in spin-valves with synthetic-ferrimagnet free-layer
- Biased quasi ballistic spin torque magnetization reversal
- Correlation of the angular dependence of spin-transfer torque and giant magnetoresistance in the limit of diffusive transport in spin valves