期刊
APPLIED PHYSICS LETTERS
卷 98, 期 10, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3561753
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资金
- Swedish Foundation for strategic Research (SSF)
- Swedish Research Council
- Goran Gustafsson Foundation
- Knut and Alice Wallenberg Foundation
We report on a numerical study of the micromagnetic switching process of a nanostructured spin torque device. We show that incoherent spin waves can be excited over a wide range of current and field even at zero temperature. These large amplitude, incoherent, and nonzero k spin wave modes are shown to alter the switching phase boundary from that calculated within a macrospin model. The presence of telegraphic transitions between different spin wave modes may also contribute to the so-called back-hopping phenomenon where the switching probability varies nonmonotonically with increasing bias current. (C) 2011 American Institute of Physics. [doi:10.1063/1.3561753]
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