An analytical model for vortex core pinning in a micromagnetic disk

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DOIResolve DOI: http://doi.org/10.1016/j.jmmm.2014.02.078
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TypeArticle
Journal titleJournal of Magnetism and Magnetic Materials
ISSN0304-8853
Volume361
Pages140149; # of pages: 10
SubjectMagnetic vortex; Micromagnetic modeling; Pinning
AbstractA two-parameter analytical model is constructed to describe a thin, magnetically soft, circular disk in the vortex state. The model is capable of describing the change in evolution of net magnetization and of vortex core position when the core interacts with a magnetic pinning site. The basis of the two-parameter model is formed by a piecewise, physically continuous, magnetization distribution constructed with two regions described by different one-parameter models. Benchmarking against numerical simulations of ideal disks with and without pinning sites shows that the model provides accurate predictions of magnetization, hysteretic transitions, and 2-D displacement of the vortex core in the presence of pinning sites. The demonstrated accuracy of the model supports its use as an empirical tool to extract quantitative maps of vortex pinning energies from measurements of magnetization.
Publication date
LanguageEnglish
AffiliationSecurity and Disruptive Technologies; National Research Council Canada
Peer reviewedYes
NPARC number21274131
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Record identifier78102243-31a4-4d02-aa6f-b4e8f8567ad6
Record created2015-02-17
Record modified2016-05-09
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