Probabilistic behavior in subnanosecond spin transfer torque switching

K. Ito, T. Devolder, C. Chappert, M. J. Carey, J. A. Katine

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11 Citations (Scopus)


We studied the magnetization dynamics induced by spin transfer torque (STT) in CoFeRuCoFeCuNiFe nanopillars using Landau-Lifshitz-Gilbert micromagnetic simulations including the STT term given by Slonczewski [J. Magn. Magn. Mater. 159, L1 (1996)] and a Gaussian thermal random force. Our simulation results clearly show the probabilistic switching behavior. The antiparallel to parallel switching at 77 K requires a smaller overdrive current than at 300 K. The parallel to antiparallel switching is not dependent on temperature. Our results show that C-like bending induced by the Ampere field plays an important role rather than the misalignment which arises from the thermal magnetization fluctuation.

Original languageEnglish
Article number08G519
JournalJournal of Applied Physics
Issue number8
Publication statusPublished - 2006
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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