Journal
JOURNAL OF APPLIED PHYSICS
Volume 101, Issue 6, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2496202
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This paper presents results of micromagnetic simulations of magnetization switching driven by spin-polarized current in magnetic tunnel junctions. For the studied structures, and for all the simulated currents, the switching occurs via nucleation process. A complete study of how a misalignment of the applied field and nonidealities in the shape of the sample affect the switching behavior has also been performed. The main results are as follows: (a) The switching mechanism does not change qualitatively by introducing a misalignment and (b) In contrast, the switching mechanism changes qualitatively when a nonideal shape is introduced. Lastly, simulations that include the effects of a 77 K thermal bath are presented; these indicate that the switching times are shorter than for zero temperature simulations (sometimes also less than 50%). (c) 2007 American Institute of Physics.
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