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

Volume

41

Issue

10

fYear

2005

Firstpage

3097

Lastpage

3099

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2005.855234

Filename

1519219