Metal-insulator transition in Nd1-x Eu-x NiO3 probed by specific heat and anelastic measurements

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dc.contributor.authorBarbeta, V. B.
dc.contributor.authorJardim, R. F.
dc.contributor.authorTorikachvili, M. S.
dc.contributor.authorEscote, M. T.
dc.contributor.authorCordero, F.
dc.contributor.authorPontes, Fenelon Martinho Lima [UNESP]
dc.contributor.authorTrequattrini, F.
dc.contributor.institutionCtr Univ FEI
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionSan Diego State Univ
dc.contributor.institutionUniversidade Federal do ABC (UFABC)
dc.contributor.institutionIst Sistemi Complessi
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Roma La Sapienza
dc.date.accessioned2014-05-20T13:26:59Z
dc.date.available2014-05-20T13:26:59Z
dc.date.issued2011-04-01
dc.description.abstractOxides RNiO3 (R - rare-earth, R not equal La) exhibit a metal-insulator (MI) transition at a temperature T-MI and an antiferromagnetic (AF) transition at T-N. Specific heat (C-P) and anelastic spectroscopy measurements were performed in samples of Nd1-xEuxNiO3, 0 <= x <= 0.35. For x - 0, a peak in C-P is observed upon cooling and warming at essentially the same temperature T-MI - T-N similar to 195 K, although the cooling peak is much smaller. For x >= 0.25, differences between the cooling and warming curves are negligible, and two well defined peaks are clearly observed: one at lower temperatures that define T-N, and the other one at T-MI. An external magnetic field of 9 T had no significant effect on these results. The elastic compliance (s) and the reciprocal of the mechanical quality factor (Q(-1)) of NdNiO3, measured upon warming, showed a very sharp peak at essentially the same temperature obtained from C-P, and no peak is observed upon cooling. The elastic modulus hardens below T-MI much more sharply upon warming, while the cooling and warming curves are reproducible above T-MI. Conversely, for the sample with x - 0.35, s and Q(-1) curves are very similar upon warming and cooling. The results presented here give credence to the proposition that the MI phase transition changes from first to second order with increasing Eu doping. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3549615]en
dc.description.affiliationCtr Univ FEI, Dept Fis, BR-09850901 Sao Bernardo do Campo, Brazil
dc.description.affiliationUniv São Paulo, Inst Fis, BR-05315970 São Paulo, Brazil
dc.description.affiliationSan Diego State Univ, Dept Phys, San Diego, CA 92182 USA
dc.description.affiliationUniversidade Federal do ABC (UFABC), Ctr Engn Modelagem & Ciencias Sociais Aplicadas, BR-09210170 Santo Andre, Brazil
dc.description.affiliationIst Sistemi Complessi, CNR ISC, I-00133 Rome, Italy
dc.description.affiliationUniv Estadual Paulista, Dept Quim, BR-17033360 Bauru, Brazil
dc.description.affiliationUniv Roma La Sapienza, Dept Phys, I-00185 Rome, Italy
dc.description.affiliationUnespUniv Estadual Paulista, Dept Quim, BR-17033360 Bauru, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipNational Science Foundation
dc.description.sponsorshipIdFAPESP: 05/53241-9
dc.description.sponsorshipIdNSF: DMR-0805335
dc.format.extent3
dc.identifierhttp://dx.doi.org/10.1063/1.3549615
dc.identifier.citationJournal of Applied Physics. Melville: Amer Inst Physics, v. 109, n. 7, p. 3, 2011.
dc.identifier.doi10.1063/1.3549615
dc.identifier.fileWOS000289952100301.pdf
dc.identifier.issn0021-8979
dc.identifier.lattes1159480346990821
dc.identifier.orcid0000-0001-6086-5303
dc.identifier.urihttp://hdl.handle.net/11449/8784
dc.identifier.wosWOS:000289952100301
dc.language.isoeng
dc.publisherAmerican Institute of Physics (AIP)
dc.relation.ispartofJournal of Applied Physics
dc.relation.ispartofjcr2.176
dc.relation.ispartofsjr0,739
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleMetal-insulator transition in Nd1-x Eu-x NiO3 probed by specific heat and anelastic measurementsen
dc.typeArtigo
dcterms.licensehttp://www.aip.org/pubservs/web_posting_guidelines.html
dcterms.rightsHolderAmer Inst Physics
unesp.author.lattes1159480346990821[6]
unesp.author.orcid0000-0001-6895-1767[5]
unesp.author.orcid0000-0002-6521-7441[7]
unesp.author.orcid0000-0002-2000-0257[2]
unesp.author.orcid0000-0001-8023-7080[1]
unesp.author.orcid0000-0001-6086-5303[6]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências, Baurupt
unesp.departmentQuímica - FCpt

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