Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 221, Issue 3, Pages 365-372Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0304-8853(00)00516-3
Keywords
classical spin models; numerical simulation studies; thermal activation; magnetization reversal; nanostructures
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For the investigations of thermally activated magnetization reversal in systems of classical magnetic moments numerical methods are desirable. We present numerical studies which base on time quantified Monte Carlo methods where the long-range dipole-dipole interaction is calculated with the aid of fast Fourier transformation. As an example, we study models for ferromagnetic nanowires comparing our numerical results for the characteristic time of the reversal process also with numerical data from Langevin dynamics simulations where the fast Fourier transformation method is well established. Depending on the system geometry different reversal mechanism occur like coherent rotation, nucleation, and curling. (C) 2000 Elsevier Science B.V. All rights reserved.
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