Open AccessSimulation of Magnetization Switching in Nanoparticle Systems
Author(s) -
Hinzke D.,
Nowak U.
Publication year - 2002
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
eISSN - 1521-396X
pISSN - 0031-8965
DOI - 10.1002/1521-396x(200202)189:2<475::aid-pssa475>3.0.co;2-4
Subject(s) - microsecond , magnetization , precession , switching time , monte carlo method , condensed matter physics , magnetization dynamics , physics , thermal fluctuations , magnetic nanoparticles , spin (aerodynamics) , landau–lifshitz–gilbert equation , nanoparticle , magnetic field , materials science , statistical physics , quantum mechanics , statistics , thermodynamics , mathematics , optoelectronics
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.