TITLE

Dynamics of coupled vortices in layered magnetic nanodots

AUTHOR(S)
Guslienko, K. Yu.; Buchanan, K. S.; Bader, S. D.; Novosad, V.
PUB. DATE
May 2005
SOURCE
Applied Physics Letters;5/30/2005, Vol. 86 Issue 22, p223112
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The spin dynamics are calculated for a model system consisting of two ferromagnetic (F) cylindrical dots, each with a magnetic vortex ground state, are separated by a nonmagnetic spacer (N). The effects of interlayer magnetostatic interactions on the vortex dynamics were explored by applying the equations of motion for the vortex core positions. For trilayer F/N/F dots with opposite chiralities and the same core polarizations two eigenmodes are predicted. One mode is in the sub-GHz range for submicron dot diameters and corresponds to quasicircular rotation of the cores about the dot center. A second mode in the MHz range corresponds to a small amplitude rotation of the mean core position.
ACCESSION #
17249932

 

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