Reversal dynamics of interacting circular nanomagnets

Author

Suess, Dieter ; Schrefl, Thomas ; Fidler, Josef ; Tsiantos, Vasillios

Author_Institution

Inst. of Appl. & Tech. Phys., Wien Univ. of Technol., Austria

Volume

37

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

1960

Lastpage

1962

Abstract

The Gilbert equation of motion is solved to investigate the reversal dynamics of interacting circular NiFe nanoelements. During magnetization reversal of isolated circular nanomagnets, inhomogeneous transient states are formed. The exchange energy of the intermediates states, which is a measure for the uniformity of the magnetization, increases with decreasing Gilbert damping constant or increasing applied field. The magnetostatic interactions lead to a further enhancement of the nonuniformity during reversal of interacting nanomagnets

Keywords

Newton method; Permalloy; ferromagnetic materials; finite element analysis; magnetic domain walls; magnetic switching; magnetisation reversal; nanostructured materials; FEM model; Gilbert damping constant; Gilbert equation of motion; Newton method; NiFe; Permalloy; exchange energy; inhomogeneous transient states; interacting circular nanomagnets; irreversible switching; magnetisation reversal dynamics; magnetisation uniformity; magnetostatic interactions; micromagnetics; nanodots; nonuniformity enhancement; Damping; Equations; Magnetic anisotropy; Magnetic domains; Magnetic field measurement; Magnetization; Magnetostatics; Magnets; Micromagnetics; Perpendicular magnetic anisotropy;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.951021

Filename

951021