Shape effects on magnetization state transitions in individual 160-nm diameter permalloy disks

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DOIResolve DOI: http://doi.org/10.1103/PhysRevB.77.174410
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TypeArticle
Journal titlePhysical Review B
Volume77
Issue17
Article number174410
Pages174410-11744410-5
AbstractThe spin dynamics in individual Permalloy nanodisks has been investigated by using time-resolved magneto-optical Kerr effect microscopy. Transitions between the vortex and quasisingle domain states have been observed by sweeping the applied bias field, and the critical bias fields for triggering vortex annihilation and nucleation have been determined by associated frequency shifts of 5–10 GHz in ferromagnetic resonance. The shape of the nanodisks has to be taken into account in three-dimensional micromagnetic simulations to obtain consistent results for the critical fields when compared to the experiment.
Publication date
LanguageEnglish
AffiliationNRC National Institute for Nanotechnology; National Research Council Canada
Peer reviewedYes
NRC number554
360
NPARC number8926298
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Record identifier1524376c-0bb5-46d5-96bf-69ed833e936d
Record created2009-04-23
Record modified2016-05-09
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