Current-induced dynamics in non-collinear dual spin-valves

Abstract

Spin-transfer torque and current induced spin dynamics in spin-valve nanopillars with the free magnetic layer located between two magnetic films of fixed magnetic moments is considered theoretically. The spin-transfer torque in the limit of diffusive spin transport is calculated as a function of magnetic configuration. It is shown that non-collinear magnetic configuration of the outermost magnetic layers has a strong influence on the spin torque and spin dynamics of the central free layer. Employing macrospin simulations we make some predictions on the free layer spin dynamics in spin valves composed of various magnetic layers. We also present a formula for critical current in non-collinear magnetic configurations, which shows that the magnitude of critical current can be several times smaller than that in typical single spin valves.

6 pages, 5 figures

References in corpus (2)

• Current-driven destabilization of both collinear configurations in asymmetric spin-valves
• Microwave excitations associated with a wavy angular dependence of the spin transfer torque : model and experiments

Cited by in corpus (5)

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• Field-free spin-orbit torque switching in Co/Pt/Co multilayer with mixed magnetic anisotropies
• Controllable Spin-Transfer Torque on an Antiferromagnet in a Dual Spin-Valve
• Spin transfer torque enhancement in dual spin valve in the ballistic regime
• Nonlinear magnetotransport in dual spin valves