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http://acervodigital.unesp.br/handle/11449/66774
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DC Field | Value | Language |
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dc.contributor.author | Amaral, V. S. | - |
dc.contributor.author | Carlos, L. D. | - |
dc.contributor.author | Silva, N. J O | - |
dc.contributor.author | De Zea Bermudez, V. | - |
dc.contributor.author | Dahmouche, K. | - |
dc.contributor.author | Santilli, Celso Valentim | - |
dc.contributor.author | Craievich, A. F. | - |
dc.contributor.author | Palacio, F. | - |
dc.date.accessioned | 2014-05-27T11:20:23Z | - |
dc.date.accessioned | 2016-10-25T18:17:33Z | - |
dc.date.available | 2014-05-27T11:20:23Z | - |
dc.date.available | 2016-10-25T18:17:33Z | - |
dc.date.issued | 2002-01-01 | - |
dc.identifier | http://dx.doi.org/10.1557/PROC-726-Q6.22 | - |
dc.identifier.citation | Materials Research Society Symposium - Proceedings, v. 726, p. 143-148. | - |
dc.identifier.issn | 0272-9172 | - |
dc.identifier.uri | http://hdl.handle.net/11449/66774 | - |
dc.identifier.uri | http://acervodigital.unesp.br/handle/11449/66774 | - |
dc.description.abstract | The 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.extent | 143-148 | - |
dc.language.iso | eng | - |
dc.source | Scopus | - |
dc.subject | Antiferromagnetism | - |
dc.subject | Crosslinking | - |
dc.subject | Doping (additives) | - |
dc.subject | Magnetic anisotropy | - |
dc.subject | Magnetic hysteresis | - |
dc.subject | Paramagnetic materials | - |
dc.subject | Polyethylene glycols | - |
dc.subject | Sol-gels | - |
dc.subject | X ray scattering | - |
dc.subject | Nanohybrid materials | - |
dc.subject | Nanostructured materials | - |
dc.title | Magnetic sol-gel derived poly(oxyethylene)-siloxane nanohybrids | en |
dc.type | outro | - |
dc.contributor.institution | Universidade de Aveiro | - |
dc.contributor.institution | Universidade Estadual Paulista (UNESP) | - |
dc.contributor.institution | Universidade de São Paulo (USP) | - |
dc.contributor.institution | Univ. de Zaragoza | - |
dc.description.affiliation | Departamento de Física CICECO Universidade de Aveiro, Aveiro | - |
dc.description.affiliation | Instituto de Química UNESP, Araraquara-SP | - |
dc.description.affiliation | Instituto de Física USP, Sao Paulo-SP | - |
dc.description.affiliation | Inst. de Ciencia de Mat. de Aragon CSIC Univ. de Zaragoza, Zaragoza | - |
dc.description.affiliationUnesp | Instituto de Química UNESP, Araraquara-SP | - |
dc.identifier.doi | 10.1557/PROC-726-Q6.22 | - |
dc.rights.accessRights | Acesso restrito | - |
dc.relation.ispartof | Materials Research Society Symposium Proceedings | - |
dc.identifier.scopus | 2-s2.0-0036441705 | - |
Appears in Collections: | Artigos, TCCs, Teses e Dissertações da Unesp |
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