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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/66774
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dc.contributor.authorAmaral, V. S.-
dc.contributor.authorCarlos, L. D.-
dc.contributor.authorSilva, N. J O-
dc.contributor.authorDe Zea Bermudez, V.-
dc.contributor.authorDahmouche, K.-
dc.contributor.authorSantilli, Celso Valentim-
dc.contributor.authorCraievich, A. F.-
dc.contributor.authorPalacio, F.-
dc.date.accessioned2014-05-27T11:20:23Z-
dc.date.accessioned2016-10-25T18:17:33Z-
dc.date.available2014-05-27T11:20:23Z-
dc.date.available2016-10-25T18:17:33Z-
dc.date.issued2002-01-01-
dc.identifierhttp://dx.doi.org/10.1557/PROC-726-Q6.22-
dc.identifier.citationMaterials Research Society Symposium - Proceedings, v. 726, p. 143-148.-
dc.identifier.issn0272-9172-
dc.identifier.urihttp://hdl.handle.net/11449/66774-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/66774-
dc.description.abstractThe magnetic and structural properties of sol-gel derived organic/inorganic nanocomposites doped with Fe(II), Fe(III), Nd(III) and Eu (III) ions are discussed. These hybrids consist of poly(oxyethylene)-based chains grafted onto siloxane nanodomains by urea cross-linkages. Small angle X-ray scattering data show the presence of spatial correlations of siloxane domains embedded in the polymer matrix. The magnetic properties of rare-earth doped samples are determined by single ion crystal-field-splitted levels (Eu3+ J=0; Nd3+ J=9/2) and the small thermal irreversibility is mainly associated to structural effects. Fe2+ -doped samples behave as simple paramagnet with residual antiferromagnetic interactions. Fe3+-doped hybrids are much more complex, with magnetic hysterisis, exchange anisotropy and thermal irreversibility at low temperatures. Néel temperatures increase up to 14K for the highest (∼5.5%) Fe3+ mass concentration.en
dc.format.extent143-148-
dc.language.isoeng-
dc.sourceScopus-
dc.subjectAntiferromagnetism-
dc.subjectCrosslinking-
dc.subjectDoping (additives)-
dc.subjectMagnetic anisotropy-
dc.subjectMagnetic hysteresis-
dc.subjectParamagnetic materials-
dc.subjectPolyethylene glycols-
dc.subjectSol-gels-
dc.subjectX ray scattering-
dc.subjectNanohybrid materials-
dc.subjectNanostructured materials-
dc.titleMagnetic sol-gel derived poly(oxyethylene)-siloxane nanohybridsen
dc.typeoutro-
dc.contributor.institutionUniversidade de Aveiro-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionUniversidade de São Paulo (USP)-
dc.contributor.institutionUniv. de Zaragoza-
dc.description.affiliationDepartamento de Física CICECO Universidade de Aveiro, Aveiro-
dc.description.affiliationInstituto de Química UNESP, Araraquara-SP-
dc.description.affiliationInstituto de Física USP, Sao Paulo-SP-
dc.description.affiliationInst. de Ciencia de Mat. de Aragon CSIC Univ. de Zaragoza, Zaragoza-
dc.description.affiliationUnespInstituto de Química UNESP, Araraquara-SP-
dc.identifier.doi10.1557/PROC-726-Q6.22-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofMaterials Research Society Symposium Proceedings-
dc.identifier.scopus2-s2.0-0036441705-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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