Show simple item record

dc.contributor.authorGhosh, S. K.
dc.contributor.authorRout, S. K.
dc.contributor.authorTiwari, A.
dc.contributor.authorYadav, P.
dc.contributor.authorSczancoski, J. C. [UNESP]
dc.contributor.authorFilho, M. G. R.
dc.contributor.authorCavalcante, L. S.
dc.date.accessioned2018-11-26T15:28:05Z
dc.date.available2018-11-26T15:28:05Z
dc.date.issued2015-11-01
dc.identifierhttp://dx.doi.org/10.1007/s10854-015-3498-x
dc.identifier.citationJournal Of Materials Science-materials In Electronics. Dordrecht: Springer, v. 26, n. 11, p. 8319-8335, 2015.
dc.identifier.issn0957-4522
dc.identifier.urihttp://hdl.handle.net/11449/158554
dc.description.abstractIn this paper, structural refinement, Raman spectroscopy, optical and electrical properties of barium strontium molybdate [(Ba1-x Sr (x) )MoO4] ceramics with different (x) contents (x = 0; 0.1; 0.2; 0.3; 0.4; 0.5; 0.6; 0.7; 0.8; 0.9; and 1) were synthesized by the solid state reaction method. These ceramics were structurally characterized by X-ray diffraction (XRD), Rietveld refinement, and micro-Raman spectroscopy. The shape of the grains for these ceramics was observed by means of scanning electron microscopy (SEM) images. The optical properties were investigated using ultraviolet-visible (UV-Vis) absorption spectroscopy and photoluminescence (PL) measurements. The dielectric and ferroelectric properties were analyzed by permittivity (epsilon(r)), loss tangent (tan delta) and polarization versus electric field (P-E) hysteresis loop. XRD patterns, Rietveld refinement, and micro-Raman spectra showed that all ceramics are monophasic with a scheelite-type tetragonal structure. A decreased of lattice parameters and unit cell volume was observed with the increase of Sr2+ ions into BaMoO4 lattice. Rietveld data were employed to model the [BaO8], [SrO8] and [MoO4] clusters in the tetragonal lattices. The SEM images indicate that increased x content promotes a decrease in the grain size and modifications in the shape. UV-Vis spectra indicated a decrease in the optical band gap values with an increase in x content in the (Ba1-x Sr (x) )MoO4 ceramics. PL emissions exhibit a non-linear behavior to increase or decrease with the increase of Sr2+ ions in the tetragonal lattices, when excited by a wavelength of 350 nm. The P-E decreases along with slim hysteresis loop towards higher Sr2+ ions concentration. These effects are correlated with decrease in lattice parameters and c/a ratio in this tetragonal lattice. The microwave dielectric constant and quality factor were measured using the method proposed by Hakki-Coleman. Temperature coefficient and quality factor of these materials were measured by vector network analyzer.en
dc.description.sponsorshipDST Fast Track project Govt. of India
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent8319-8335
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofJournal Of Materials Science-materials In Electronics
dc.sourceWeb of Science
dc.titleStructural refinement, Raman spectroscopy, optical and electrical properties of (Ba1-xSrx)MoO4 ceramicsen
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer
dc.contributor.institutionBirla Inst Technol
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Estadual Piaui
dc.description.affiliationBirla Inst Technol, Dept Phys, Electroceram Lab, Ranchi, Bihar, India
dc.description.affiliationUniv Estadual Paulista, LIEC IQ, BR-14801907 Sao Paulo, Brazil
dc.description.affiliationUniv Estadual Piaui, PPGQ GERATEC, BR-64002150 Teresina, PI, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, LIEC IQ, BR-14801907 Sao Paulo, Brazil
dc.identifier.doi10.1007/s10854-015-3498-x
dc.identifier.wosWOS:000362663300010
dc.rights.accessRightsAcesso aberto
dc.description.sponsorshipIdDST Fast Track project Govt. of India: SB/FT/CS-044/2013
dc.description.sponsorshipIdCNPq: 304531/2013-8
dc.description.sponsorshipIdFAPESP: 2012/14004-5
dc.identifier.fileWOS000362663300010.pdf
dc.relation.ispartofsjr0,503
Localize o texto completo

Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record