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R. Dittrich, T. Schrefl, A. Thiaville, J. Miltat, V. Tsiantos, J. Fidler:
"Comparison of Langevin dynamics and direct energy barrier computation";
Journal of Magnetism and Magnetic Materials, 272-276 (2004), 747 - 749.

Comparison of Langevin dynamics and direct energy barrier computation

Rok DittrichCorresponding Author Contact Information, E-mail The Corresponding Author, a, Thomas Schrefla, André Thiavilleb, Jacques Miltatb, Vassilios Tsiantosa and Josef Fidlera

a Institut für Festkörperphysik, Vienna University of Technology, Wiedner Hauptstrasse 8-10, 1040, Vienna, Austria
b CNRS-Université Paris-sud, Laboratoire de physique des solides, 91405, Orsay, France

Available online 10 January 2004.


Abstract

Two complementary methods to study thermal effects in micromagnetics are compared. On short time scales Langevin dynamics gives insight in the thermally activated dynamics. For longer time scales the "nudged elastic band" method is applied. The method calculates a highly probable thermal switching path between two local energy minima of a micromagnetic system. Comparing the predicted thermal transition rates between ground states in small softmagnetic elements up to a size of 90×90×4.5 nm3 gives good agreement of the methods

Author Keywords: Micromagnetic simulations; Thermal switching; Transition rates; Energy barriers; Langevin dynamics; Saddle points

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC04970317

doi:10.1016/j.jmmm.2003.11.274