Simulation of Magnetization Switching in Nanoparticle Systems

Details Simulation of Magnetization Switching in Nanoparticle Systems Simulation of Magnetization Switching in Nanoparticle Systems

2002-03-04

arxiv.org/abs/cond-mat/0203054v1

Phys. Stat. Sol. 189, 475 (2002)

Physics

Condensed Matter

Statistical Mechanics

10 pages, 3 figures

Scientific paper

Magnetization reversal in magnetic nanostructures is investigated numerically over time-scales ranging from fast switching processes on a picosecond scale to thermally activated reversal on a microsecond time-scale. A simulation of the stochastic Landau-Lifshitz equation of motion is used as well as a time quantified Monte Carlo method for the simulation of classical spin systems modeling magnetic Co nanoparticles. For field pulses larger than the Stoner-Wohlfarth limit spin precession effects govern the reversal behavior of the particle while for lower fields a magnetization reversal is only possible when it is assisted by thermal fluctuations.

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