Show simple item record

dc.contributor.authorFANNIN, PAUL
dc.contributor.authorCOUPER, COLIN STUART
dc.date.accessioned2011-03-16T15:47:06Z
dc.date.available2011-03-16T15:47:06Z
dc.date.issued2011
dc.date.submitted2011en
dc.identifier.citationP.C. Fannin, C.N. Marin, C. Couper, The resonance decay function method in the determination of the pre-factor of the neel relaxation time of single-domain nanoparticles, Journal of Magnetism and Magnetic Materials, 323, 10, 2011, 1242-1245en
dc.identifier.otherY
dc.identifier.urihttp://hdl.handle.net/2262/53325
dc.descriptionPUBLISHEDen
dc.description.abstractIn its simple form, the relaxation time of the Neel relaxation process of the magnetic moment of single-domain particles is given by ?N=?0Nexp(?), ? being the ratio of the anisotropy energy to thermal energy. The pre-factor, ?0N , is normally given a value of 10?9 s, but values ranging from 10?8 to 10?12 s have been reported in literature. Here, by means of the field and frequency dependence of the complex magnetic susceptibility, ?(?,H)=??(?,H)-i ??(?,H), of a magnetic fluid sample, in the MHz ? GHz range, in conjunction with the determination of the sample decay function, b(t), the pre-factor ?0N is determined. b(t) is readily obtained through the inverse Fourier transformation relationship which exists between b(t) and ?? (?).en
dc.description.sponsorshipP.C. Fannin acknowledges ESA for part funding of this work and also M. Hennessy for the support given. C.N. Marin gratefully acknowledges partial financial support from CNMP Grant no. 1-32155/2008.en
dc.format.extent1242-1245en
dc.language.isoenen
dc.publisherElsevieren
dc.relation.ispartofseriesJournal of Magnetism and Magnetic Materials;
dc.relation.ispartofseries323;
dc.relation.ispartofseries10;
dc.rightsYen
dc.subjectPhysical chemistryen
dc.subjectMagnetic fluidsen
dc.titleThe resonance decay function method in the determination of the pre-factor of the neel relaxation time of single-domain nanoparticlesen
dc.typeJournal Articleen
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/pfannin
dc.identifier.peoplefinderurlhttp://people.tcd.ie/couperc
dc.identifier.rssinternalid69461
dc.identifier.rssurihttp://dx.doi.org/10.1016/j.jmmm.2010.11.014en


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record