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

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

2010-09-27

arxiv.org/abs/1009.5240v1

Applied Physics Letters 97, 262502 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 page, 3 figures

Scientific paper

10.1063/1.3532960

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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