Spin-transfer pulse switching: From the dynamic to the thermally activated regime

Abstract : The effect of thermal fluctuations on spin-transfer switching has been studied for a broad range of time scales (sub-ns to seconds) in a model system, a uniaxial thin film nanomagnet. The nano-magnet is incorporated into a spin-valve nanopillar, which is subject to spin-polarized current pulses of variable amplitude and duration. Two physical regimes are clearly distinguished: a long pulse duration regime, in which reversal occurs by spin-transfer assisted thermal activation over an energy barrier, and a short time large pulse amplitude regime, in which the switching probability is determined by the spin angular momentum in the current pulse.
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D. Bedau, H Liu, J Sun, J. Katine, E. Fullerton, et al.. Spin-transfer pulse switching: From the dynamic to the thermally activated regime. Applied Physics Letters, American Institute of Physics, 2010, 97, ⟨10.1063/1.3532960⟩. ⟨hal-02099433⟩

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