Vortex dynamics in submicron exchange-biased disks

Using micromagnetic simulation we have investigated the vortex dynamics in an exchange‐biased permalloy nanodisk with 500 nm‐radius and 10 nm‐thickness. We found the exchange bias plays an important role in the vortex dynamics. The exchange bias results in the elliptical trajectory. The vortex dynam...

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Bibliographic Details
Published in:Physica Status Solidi (b) 2007-12, Vol.244 (12), p.4491-4494
Main Authors: Moon, Jung Hwan, Kim, Woo Jin, Lee, Taek Dong, Lee, Kyung-Jin
Format: Article
Language:English
Subjects:
71.70.Gm
75.70.Cn
75.75.+a
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Magnetic properties of nanostructures
Physics
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Summary:Using micromagnetic simulation we have investigated the vortex dynamics in an exchange‐biased permalloy nanodisk with 500 nm‐radius and 10 nm‐thickness. We found the exchange bias plays an important role in the vortex dynamics. The exchange bias results in the elliptical trajectory. The vortex dynamics in the exchange‐biased nanodisk is strongly affected by the angle between the exchange bias field and the external field. We found that it is possible to selectively transform the vortex state into the single domain state with a pulsed magnetic field by controlling the magnitude and the angle of the external magnetic field. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:0370-1972
1521-3951
DOI:10.1002/pssb.200777157