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dc.contributor.authorCOFFEY, WILLIAM THOMAS
dc.contributor.authorKALYMYKOV, YURI PETROVICH
dc.date.accessioned2009-06-17T09:31:40Z
dc.date.available2009-06-17T09:31:40Z
dc.date.issued2009
dc.date.submitted2009en
dc.identifier.citationCoffey, W.T., Dejardin, P.-M., Kalmykov, Y.P., 'Reversal time of the magnetization of single-domain ferromagnetic particles with mixed uniaxial and cubic anisotropy' in Physical Review B - Condensed Matter and Materials Physics, 79, 5, (2009), art. no. 054401en
dc.identifier.otherY
dc.identifier.otherYen
dc.identifier.urihttp://hdl.handle.net/2262/30507
dc.descriptionPUBLISHEDen
dc.description.abstractThe reversal time of the magnetization of single-domain ferromagnetic particles is estimated for mixed uniaxial and cubic anisotropy energies possessing nonparaboloidal saddles and well bottoms or either. The calculation generalizes the existing adaptation of the Kramers escape rate theory to fine ferromagnetic particles with nonaxially symmetric magnetocrystalline-Zeeman energies, originally based on the paraboloidal approximation for the energy near its stationary points, yielding in addition a simple universal Kramers turnover formula (based on the Mel'nikov-Meshkov depopulation factor) for the reversal time valid for all values of the damping. The asymptotic solution is compared with the appropriate numerically exact solution of the corresponding Fokker-Planck equation for the probability density function of magnetization orientations. The predictions of the generalized nonparaboloidal stationary point turnover formula agree with the numerical solution for a wide range of damping and other parameters characterizing the mixed anisotropy.en
dc.description.sponsorshipThe authors are grateful to H. Kachkachi and L. Cleary for helpful discussions.en
dc.format.extentart. no. 054401en
dc.format.extent231912 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.ispartofseriesPhysical Review B - Condensed Matter and Materials Physicsen
dc.relation.ispartofseries79en
dc.relation.ispartofseries5en
dc.rightsYen
dc.subjectferromagnetism, magnetic anisotropy, magnetic domains, magnetisation reversal, Zeeman effecten
dc.titleReversal time of the magnetization of single-domain ferromagnetic particles with mixed uniaxial and cubic anisotropyen
dc.typeJournal Articleen
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/wcoffey


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