Effect of Eu substitution on the crystallographic and magnetic properties of the BiMn2O5 oxide obtained by urea combustion

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorUniv Rennes 1
dc.contributorInst Tecnol Desenvolvimento LACTEC
dc.creatorFerreira, Rafael A. [UNESP]
dc.creatorSantos, Maria Elenice dos [UNESP]
dc.creatorMorilla-Santos, Cassio
dc.creatorLebullenger, Ronan
dc.creatorPena, Octavio
dc.creatorLisboa-Filho, Paulo Noronha [UNESP]
dc.date2015-03-18T15:53:22Z
dc.date2015-03-18T15:53:22Z
dc.date2014-09-01
dc.date.accessioned2023-09-09T11:05:14Z
dc.date.available2023-09-09T11:05:14Z
dc.identifierhttp://dx.doi.org/10.1016/j.ceramint.2014.05.091
dc.identifierCeramics International. Oxford: Elsevier Sci Ltd, v. 40, n. 8, p. 13643-13648, 2014.
dc.identifier0272-8842
dc.identifierhttp://hdl.handle.net/11449/116470
dc.identifier10.1016/j.ceramint.2014.05.091
dc.identifierWOS:000340321300130
dc.identifier1353862414532005
dc.identifier0000-0002-7734-4069
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8765955
dc.descriptionPolycrystalline oxide materials with nominal compositions BiMn2O5 and Bi0.9Eu0.1Mn2O5 were obtained by urea combustion. Crystallographic studies using X-ray diffraction and Rietveld Refinement techniques showed the formation of single-phase samples for both compositions, crystallizing in a mullite-type orthorhombic perovskite structure, space group Pbam (Z=4). Replacement of Bi+3 by Eu+3 promoted a slight distortion and a unit cell contraction due to a decrease of the c-parameter for Bi0.9Eu0.1Mn2O5. The SEM/EDX techniques confirmed the formation of single-phase materials with excellent mapping distribution. Magnetic measurements showed different behaviors: BiMn2O5 is an antiferromagnet (AFM) with a Neel temperature (T-N) of 41 K and a Curie-Weiss temperature Theta(CW) of -277 K, while Bi0.9Eu0.1Mn2O5 displayed a ferrimagnetic behavior with a T-C of 44K and Theta(CW) of 270 K. The role of Eu+3 and the mechanisms responsible for the magnetic transition are discussed on the basis of chemical bonds and exchange interactions. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionUNESP Univ Estadual Paulista, POSMAT Programa Posgrad Ciencia & Tecnol Mat, Bauru, SP, Brazil
dc.descriptionUniv Rennes 1, Inst Sci Chim Rennes UMR 6226, F-35014 Rennes, France
dc.descriptionInst Tecnol Desenvolvimento LACTEC, Curitiba, Parana, Brazil
dc.descriptionUNESP Univ Estadual Paulista, Dept Fis, Fac Ciencias, Bauru, SP, Brazil
dc.descriptionUNESP Univ Estadual Paulista, POSMAT Programa Posgrad Ciencia & Tecnol Mat, Bauru, SP, Brazil
dc.descriptionUNESP Univ Estadual Paulista, Dept Fis, Fac Ciencias, Bauru, SP, Brazil
dc.descriptionFAPESP: 07/08072-0
dc.descriptionFAPESP: 13/07296-2
dc.descriptionCAPES: 706/11
dc.format13643-13648
dc.languageeng
dc.publisherElsevier B.V.
dc.relationCeramics International
dc.relation3.057
dc.relation0,784
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subjectPowders: chemical preparation
dc.subjectX-ray methods
dc.subjectMagnetic properties
dc.subjectPerovskites
dc.titleEffect of Eu substitution on the crystallographic and magnetic properties of the BiMn2O5 oxide obtained by urea combustion
dc.typeArtigo


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