Title :
Influence of eddy current on magnetization processes in submicrometer permalloy structures
Author :
Hrkac, G. ; Schrefl, T. ; Ertl, O. ; Suess, D. ; Kirschner, M. ; Dorfbauer, F. ; Fidler, J.
Author_Institution :
Inst. of Solid State Phys., Vienna Univ. of Technol., Austria
Abstract :
In this paper, we determine the critical particle size and conductivity range that leads to pronounced eddy current effects on magnetization reversal of magnetic nanostructures. An extended finite-element micromagnetic solver which includes eddy currents is used to calculate the magnetization behavior of a permalloy nanocube of 27 nm side under the influence of an applied field. It is shown that for high-conductivity σ>106 (Ω m)-1 in the intermediate state of reversal it takes the magnetization longer to fully align in the direction of the applied field.
Keywords :
Permalloy; boundary-elements methods; eddy currents; finite element analysis; magnetisation reversal; micromagnetics; nanostructured materials; 27 nm; FE method; boundary element method; conductivity range; critical particle size; eddy current effect; finite-element method; finite-element micromagnetic solver; magnetic nanostructure; magnetization process; magnetization reversal; permalloy nanocube; submicrometer permalloy structure; Eddy currents; Finite element methods; Iron; Magnetic anisotropy; Magnetic materials; Magnetization processes; Magnetostatics; Maxwell equations; Perpendicular magnetic anisotropy; Soft magnetic materials; Boundary element methods; Landau–Lifshitz–Gilbert (LLG); eddy currents; finite-element (FE) methods;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.855234
