Title :
Thermally induced vortex nucleation in permalloy elements
Author :
Dittrich, R. ; Kirschner, M. ; Schrefl, T. ; Suess, D. ; Fidler, J.
Author_Institution :
Vienna Univ. of Technol., Austria
Abstract :
In soft magnetic thin film elements thermal fluctuations may drive the system over energy barriers in time spans equivalent to the measuring time. In order to address this effect in micromagnetic simulations, a method that combines standard Landau-Lifshitz-Gilbert (LLG) micromagnetics and an elastic band method is proposed. The critical fields for vortex nucleation and the non-zero temperature hysteresis curve can be accurately predicted by this novel technique.
Keywords :
Permalloy; magnetic thin films; magnetocaloric effects; micromagnetics; nucleation; soft magnetic materials; vortices; Landau-Lifshitz-Gilbert micromagnetics; Permalloy; critical field; elastic band method; energy barrier; measuring time; micromagnetic simulation; nonzero temperature hysteresis curve; soft magnetic thin film; time span; vortex nucleation; Computational modeling; Energy barrier; Fluctuations; Magnetic films; Magnetic hysteresis; Magnetic materials; Micromagnetics; Saturation magnetization; Soft magnetic materials; Temperature dependence;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1463882
