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dc.contributor.authorCOFFEY, WILLIAM THOMAS
dc.contributor.authorKALYMYKOV, YURI PETROVICH
dc.contributor.authorTITOV, SERGEY
dc.date.accessioned2009-06-17T12:12:10Z
dc.date.available2009-06-17T12:12:10Z
dc.date.issued2005
dc.date.submitted2005en
dc.identifier.citationTitov, S. V.Kachkachi, H.Kalmykov, Y. P.Coffey, W. T. 'Magnetization dynamics of two interacting spins in an external magnetic field' in Physical Review B, 72, 13, (2005), pp 13442 - 13442en
dc.identifier.otherY
dc.identifier.otherYen
dc.identifier.urihttp://hdl.handle.net/2262/30553
dc.descriptionPUBLISHEDen
dc.description.abstractThe longitudinal relaxation time of the magnetization of a system of two exchange coupled spins subjected to a strong magnetic field is calculated exactly by averaging the stochastic Gilbert-Landau-Lifshitz equation for the magnetization, i.e., the Langevin equation of the process, over its realizations, so reducing the problem to a system of linear differential-recurrence relations for the statistical moments (averaged spherical harmonics). The system is solved in the frequency domain by matrix-continued fractions, yielding the complete solution of the two-spin problem in external fields for all values of the damping and barrier height parameters. The magnetization relaxation time extracted from the exact solution is compared with the inverse relaxation rate from Langer?s theory of the decay of metastable states [J. S. Langer, Ann. Phys. (N.Y.) 54, 258 (1969)], which yields in the high barrier and intermediate-to-high damping limits the asymptotic behavior of the greatest relaxation time.en
dc.description.sponsorshipThe support of this work by INTAS Project No. 01-2341 is gratefully acknowledged. S.V.T. thanks the University of Versailles for the award of a Visiting Professorship.en
dc.format.extent13442en
dc.format.extent13442en
dc.format.extent157943 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.ispartofseriesPhysical Review Ben
dc.relation.ispartofseries72en
dc.relation.ispartofseries13en
dc.rightsYen
dc.subjectElectronic & Electrical Engineeringen
dc.titleMagnetization dynamics of two interacting spins in an external magnetic fielden
dc.typeJournal Articleen
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/wcoffey
dc.identifier.rssinternalid32208


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