Evidence of weak ferromagnetism in doped plasticized polyaniline (PANI-DDoESSA)0.5 from electron spin resonance measurements

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dc.contributor.authorSantana, V. T. [UNESP]
dc.contributor.authorNascimento, O. R.
dc.contributor.authorDjurado, D.
dc.contributor.authorTravers, J. P.
dc.contributor.authorPron, A.
dc.contributor.authorWalmsley, L. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionCEA Grenoble
dc.contributor.institutionWarsaw University of Technology
dc.date.accessioned2014-05-27T11:28:42Z
dc.date.available2014-05-27T11:28:42Z
dc.date.issued2013-03-20
dc.description.abstractX-band electron spin resonance (ESR) measurements have been performed on a conducting free-standing film of polyaniline plasticized and protonated with di-n-dodecyl ester of sulfosuccinic acid (DDoESSA). The magnetic field was applied parallel and perpendicular to the plane of the film. At around 75 K a transition is observed from Pauli susceptibility to a localized state in which the spin 1/2 polarons behave as spin 1/2 dimers. A rough estimation of the intradimer and interdimer exchange constants is obtained. Below 5 K, ESR data reveal a weak ferromagnetism with the Dzyaloshinskii-Moriya vector mainly oriented in the plane of the film. The existence of a relatively well-defined n-fold axis along the chain direction in the crystalline regions confers a symmetry compatible with such analysis. © 2013 IOP Publishing Ltd.en
dc.description.affiliationDepartamento de Física Instituto de Geociências e Ciências Exatas Universidade Estadual Paulista (UNESP), Caixa Postal 178, CEP 13500-970, Rio Claro, SP
dc.description.affiliationInstituto de Física de São Carlos Universidade de São Paulo, Caixa Postal 369, CEP 13560-970, São Carlos, SP
dc.description.affiliationINAC/SPrAM Structure et Propriétés d'Architectures Moléculaires UMR5819 (CEA-CNRS-UJF) CEA Grenoble, 17 rue des Martyrs, F-38054 Grenoble, cedex 9
dc.description.affiliationFaculty of Chemistry Warsaw University of Technology, Noakiowskiego 3, 00-664 Warsaw
dc.description.affiliationUnespDepartamento de Física Instituto de Geociências e Ciências Exatas Universidade Estadual Paulista (UNESP), Caixa Postal 178, CEP 13500-970, Rio Claro, SP
dc.identifierhttp://dx.doi.org/10.1088/0953-8984/25/11/116004
dc.identifier.citationJournal of Physics Condensed Matter, v. 25, n. 11, 2013.
dc.identifier.doi10.1088/0953-8984/25/11/116004
dc.identifier.issn0953-8984
dc.identifier.issn1361-648X
dc.identifier.scopus2-s2.0-84874274684
dc.identifier.urihttp://hdl.handle.net/11449/74854
dc.identifier.wosWOS:000315597600022
dc.language.isoeng
dc.relation.ispartofJournal of Physics: Condensed Matter
dc.relation.ispartofjcr2.617
dc.relation.ispartofsjr0,875
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectA transitions
dc.subjectChain direction
dc.subjectCrystalline regions
dc.subjectDzyaloshinskii-moriya
dc.subjectElectron spin resonance measurements
dc.subjectExchange constants
dc.subjectFreestanding films
dc.subjectLocalized state
dc.subjectProtonated
dc.subjectRough estimation
dc.subjectSpin 1/2
dc.subjectWeak ferromagnetism
dc.subjectX-band electron spin resonances
dc.subjectPolyaniline
dc.subjectFerromagnetism
dc.titleEvidence of weak ferromagnetism in doped plasticized polyaniline (PANI-DDoESSA)0.5 from electron spin resonance measurementsen
dc.typeArtigo
dcterms.licensehttp://iopscience.iop.org/page/copyright
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Geociências e Ciências Exatas, Rio Claropt

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