Journal
APPLIED PHYSICS LETTERS
Volume 97, Issue 26, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3532960
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Funding
- USARO [W911NF0710643]
- NSF-DMR [0706322, 1006575, 1008654]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1006575, 1008654] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0706322] Funding Source: National Science Foundation
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The effect of thermal fluctuations on spin-transfer switching has been studied for a broad range of time scales (subnanoseconds 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. (C) 2010 American Institute of Physics. [doi:10.1063/1.3532960]
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