Title :
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
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;
Conference_Titel :
Magnetics Conference, 2006. INTERMAG 2006. IEEE International
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-1479-2
DOI :
10.1109/INTMAG.2006.376479
