Dielectric and impedance properties of Nd3/2Bi3/2Fe5O12 ceramics

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dc.contributor.authorJawahar, K.
dc.contributor.authorBehera, Banarji [UNESP]
dc.contributor.authorChoudhary, R. N. P.
dc.contributor.institutionIndian Inst Technol
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:29:45Z
dc.date.available2014-05-20T13:29:45Z
dc.date.issued2009-09-01
dc.description.abstractThe polycrystalline sample of Nd3/2Bi3/2Fe5O12 was prepared by a high- temperature solid-state reaction technique. Preliminary X-ray structural analysis exhibits the formation of a single-phase tetragonal structure at room temperature. Microstructural analysis by scanning electron microscopy shows that the sintered sample has well defined grains. These grains are distributed uniformly throughout the surface of the sample. Detailed studies of dielectric response at various frequencies and temperatures exhibit a dielectric anomaly at 400 A degrees C. The electrical properties (impedance, modulus and conductivity) of the material were studied using a complex impedance spectroscopy technique. These studies reveal a significant contribution of grain and grain boundary effects in the material. The frequency dependent plots of modulus and the impedance loss show that the conductivity relaxation is of non-Debye type. Studies of electrical conductivity with temperature demonstrate that the compound exhibits Arrhenius-type of electrical conductivity. Study of ac conductivity with frequency suggests that the material obeys Jonscher's universal power law.en
dc.description.affiliationIndian Inst Technol, Dept Phys & Meteorol, Kharagpur 721302, W Bengal, India
dc.description.affiliationUniv Estadual Paulista, Dept Quim & Fis, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Quim & Fis, BR-15385000 Ilha Solteira, SP, Brazil
dc.format.extent872-878
dc.identifierhttp://dx.doi.org/10.1007/s10854-008-9809-8
dc.identifier.citationJournal of Materials Science-materials In Electronics. Dordrecht: Springer, v. 20, n. 9, p. 872-878, 2009.
dc.identifier.doi10.1007/s10854-008-9809-8
dc.identifier.issn0957-4522
dc.identifier.urihttp://hdl.handle.net/11449/10064
dc.identifier.wosWOS:000268312900008
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofJournal of Materials Science: Materials in Electronics
dc.relation.ispartofjcr2.324
dc.relation.ispartofsjr0,503
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleDielectric and impedance properties of Nd3/2Bi3/2Fe5O12 ceramicsen
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Ilha Solteirapt

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Artigos - Física e Química - FEIS