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arXiv · 1009.5240

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

D. Bedau·H. Liu·J. Z. Sun·J. A. Katine·E. E. Fullerton·S. Mangin·A. D. Kent
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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 nanomagnet 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. Z. Sun, J. A. Katine, E. E. Fullerton, S. Mangin, A. D. Kent. 2010-09-27. Spin-transfer pulse switching: From the dynamic to the thermally activated regime. https://doi.org/10.1063/1.3532960

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