Magnetic vortex dynamics in elliptical dots: Field dependence and interaction effects

Author

Buchanan, K.S. ; Roy, P.E. ; Grimsditch, M. ; Fradin, F.Y. ; Guslienko, K.Y. ; Bader, S.D. ; Novosad, V.

Author_Institution

Argonne Nat. Lab., Argonne

fYear

2006

fDate

8-12 May 2006

Firstpage

755

Lastpage

755

Abstract

This study aims to investigate experimentally the dynamics of magnetic vortices and vortex pairs confined in lithographically defined Permalloy ellipses using microwave reflection technique. The single vortex magnetization state exhibits a single, low frequency peak in the impedance derivative spectrum for a given external field. Experimental results show that vortex polarization dominates the vortex dynamics while it plays a negligible role in the static interaction.

Keywords

Permalloy; exchange interactions (electron); ferromagnetic materials; magnetisation; FeNi; elliptical dots; impedance derivative spectrum; lithographically defined Permalloy ellipses; magnetic vortex dynamics; microwave reflection technique; single vortex magnetization state; static interaction; vortex pairs; vortex polarization; Coplanar waveguides; Frequency; Magnetic confinement; Magnetic force microscopy; Magnetic forces; Magnetic resonance; Magnetostatic waves; Micromagnetics; Polarization; Saturation magnetization;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2006. INTERMAG 2006. IEEE International

Conference_Location

San Diego, CA

Print_ISBN

1-4244-1479-2

Type

conf

DOI

10.1109/INTMAG.2006.376479

Filename

4262188