Abstract
Spin transfer in an asymmetric nanopillar spin valve is studied numerically in the diffusive transport regime. The system considered includes a pinned synthetic antiferromagnetic structure, which is separated from the sensing layer by a thin nonmagnetic film. Landau-Lifshitz-Gilbert equation, with the spin-transfer torque taken into account, is used to study current-induced magnetic dynamics in the macrospin model. It is shown that steady dynamical states can occur in the absence of magnetic field. The advantage of systems including a synthetic antiferromagnetic structure, compared to simple spin valves, is also discussed.
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