Title :
Thermally activated magnetization rotation in small nanoparticles
Author :
Tsiantos, Vassilios ; Schrefl, Thomas ; Scholz, Werner ; Forster, Hermann ; Suess, Dieter ; Dittrich, Rok ; Fidler, Josef
Author_Institution :
Inst. of Solid State Phys., Vienna Univ. of Technol., Austria
Abstract :
In this paper, we test the performance and validity of a semi-implicit time-integration scheme, originally applied in quantum dynamics, for use in micromagnetics. The attempt frequency and energy barriers are calculated for Co nanoparticles. Moreover, a fit of the relaxation time to the Arrhenius-Neel law is presented. The semi-implicit time-integration method is very robust and allows time steps up to 3 ps at a temperature of 50 K.
Keywords :
cobalt; magnetisation reversal; nanoparticles; thermal stability; 50 K; Arrhenius-Neel law; Co; attempt frequency; energy barriers; magnetic reversal; micromagnetics; nanoparticles; relaxation time; semi-implicit time-integration scheme; thermal stability; thermal switching; thermally activated magnetization rotation; Energy barrier; Equations; Finite element methods; Fluctuations; Frequency; Magnetic anisotropy; Magnetization; Micromagnetics; Nanoparticles; Perpendicular magnetic anisotropy;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.816456
