Electrically detected and conventional magnetic resonance investigation of surface and bulk states in polyaniline thin films

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dc.contributor.authorCastro, Fernando A.
dc.contributor.authorGraeff, Carlos Frederico de Oliveira [UNESP]
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:20:29Z
dc.date.available2014-05-20T15:20:29Z
dc.date.issued2007-04-15
dc.description.abstractElectrically detected magnetic resonance (EDMR) and electron paramagnetic resonance (EPR) were used to investigate emeraldine base polyaniline films. The magnetic susceptibility presented a Curie (localized spins)-Pauli (delocalized spins) transition at 240 K, when we also observed a transition in the dependence of the g factor with temperature (T). Peak-to-peak linewidth decreases with increasing temperature, reflecting that motional narrowing limits the hyperfine and dipolar broadening in this polymer. EDMR spectra could only be observed above 250 K in accordance to EPR results. Surface and bulk transport could be separated and their analysis reflected the effect of magnetic interaction with oxygen. (c) 2007 American Institute of Physics.en
dc.description.affiliationUniv São Paulo, FFCLRP, Dept Fis & Matemat, BR-14040901 Ribeirao Preto, Brazil
dc.description.affiliationUNESP, Dept Fis, FC, BR-17033360 Bauru, SP, Brazil
dc.description.affiliationUnespUNESP, Dept Fis, FC, BR-17033360 Bauru, SP, Brazil
dc.format.extent5
dc.identifierhttp://dx.doi.org/10.1063/1.2719007
dc.identifier.citationJournal of Applied Physics. Melville: Amer Inst Physics, v. 101, n. 8, 5 p., 2007.
dc.identifier.doi10.1063/1.2719007
dc.identifier.fileWOS000246072200099.pdf
dc.identifier.issn0021-8979
dc.identifier.orcid0000-0003-0162-8273
dc.identifier.urihttp://hdl.handle.net/11449/31764
dc.identifier.wosWOS:000246072200099
dc.language.isoeng
dc.publisherAmerican Institute of Physics (AIP)
dc.relation.ispartofJournal of Applied Physics
dc.relation.ispartofjcr2.176
dc.relation.ispartofsjr0,739
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleElectrically detected and conventional magnetic resonance investigation of surface and bulk states in polyaniline thin filmsen
dc.typeArtigo
dcterms.licensehttp://publishing.aip.org/authors/web-posting-guidelines
dcterms.rightsHolderAmer Inst Physics
unesp.author.lattes5268607684223281[2]
unesp.author.orcid0000-0003-0162-8273[2]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências, Baurupt
unesp.departmentFísica - FCpt

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