Magnetic properties of acicular ultrafine iron particles

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dc.contributor.authorVaranda, L. C.
dc.contributor.authorGoya, G. F.
dc.contributor.authorMorales, M. P.
dc.contributor.authorMarques, RFC
dc.contributor.authorGodoi, RHM
dc.contributor.authorJafelicci, M.
dc.contributor.authorSerna, C. J.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionInst Ciência Mat
dc.contributor.institutionUniv Antwerp
dc.date.accessioned2014-05-20T15:20:40Z
dc.date.available2014-05-20T15:20:40Z
dc.date.issued2002-09-01
dc.description.abstractMagnetic properties of acicular (similar to60 and similar to200 nm) iron particles, obtained by reduction of alumina-coated goethite particles, are reported. X-ray diffraction and Mossbauer spectroscopy showed that the particles consist of a alpha-Fe core and a thin surface layer of maghemite. Magnetization data indicated an improvement of similar to28% in the saturation magnetization, coercive field, and squareness for particles with similar to60 nm. This magnetic property enhancement of the present particles, whose size is 40% smaller than those commercially available, could result in a similar decrease of the bit-size for higher density of magnetic media.en
dc.description.affiliationUNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUniv São Paulo, Inst Fis, BR-05315970 São Paulo, SP, Brazil
dc.description.affiliationInst Ciência Mat, Madrid 28029, Spain
dc.description.affiliationUniv Antwerp, B-2610 Wilrijk, Belgium
dc.description.affiliationUnespUNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.format.extent1907-1909
dc.identifierhttp://dx.doi.org/10.1109/TMAG.2002.802816
dc.identifier.citationIEEE Transactions on Magnetics. New York: IEEE-Inst Electrical Electronics Engineers Inc., v. 38, n. 5, p. 1907-1909, 2002.
dc.identifier.doi10.1109/TMAG.2002.802816
dc.identifier.issn0018-9464
dc.identifier.lattes2115942621694174
dc.identifier.urihttp://hdl.handle.net/11449/31913
dc.identifier.wosWOS:000178867200012
dc.language.isoeng
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.relation.ispartofIEEE Transactions on Magnetics
dc.relation.ispartofjcr1.467
dc.relation.ispartofsjr0,488
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectcoercivitypt
dc.subjectmagnetic recordingpt
dc.subjectmagnetic variable measurementspt
dc.subjectmetal ultrafine particlespt
dc.subjectpassivationpt
dc.titleMagnetic properties of acicular ultrafine iron particlesen
dc.typeArtigo
dcterms.licensehttp://www.ieee.org/publications_standards/publications/rights/rights_policies.html
dcterms.rightsHolderIEEE-Inst Electrical Electronics Engineers Inc
unesp.author.lattes2115942621694174
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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Artigos - Físico Química - IQ