Anelastic spectroscopy study of the metal-insulator transition of Nd 1-xEuxNiO3

Página do item simplificado
dc.contributor.authorCordero F.
dc.contributor.authorTrequattrini F.
dc.contributor.authorBarbeta V.B.
dc.contributor.authorJardim R.F.
dc.contributor.authorTorikachvili M.S.
dc.date.accessioned2019-08-19T23:47:28Z
dc.date.available2019-08-19T23:47:28Z
dc.date.issued2011
dc.description.abstractMeasurements are presented of the complex dynamic Young's modulus of NdNiO3 and Nd0.65Eu0.35NiO3 through the metal-insulator transition (MIT). Upon cooling, the modulus presents a narrow dip at the MIT followed by an abrupt stiffening of ∼6%. The anomaly is reproducible between cooling and heating in Nd0.65Eu 0.35NiO3 but appears only as a slow stiffening during cooling in undoped NdNiO3, in conformance with the fact that the MIT in RNiO3 changes from strongly first order to second order when the mean R size is decreased. The elastic anomaly seems not to be associated with the antiferromagnetic transition, which is distinct from the MIT in Nd 0.65Eu0.35NiO3. It is concluded that the steplike stiffening is due to the disappearance or freezing of dynamic Jahn-Teller (JT) distortions through the MIT, where the JT active Ni3 + is disproportionated into alternating Ni3+δ and Ni3-δ. The fluctuating octahedral JT distortion necessary to justify the observed jump in the elastic modulus is estimated as ∼3% but does not have a role in determining the MIT, since the otherwise-expected precursor softening is not observed. © 2011 American Physical Society.
dc.description.firstpage125127-1
dc.description.issuenumber12
dc.description.lastpage125127-10
dc.description.volume84
dc.identifier.citationCORDERO, F.; TREQUATTRINI, F.; BARBETA, V. B.; JARDIM, R. F.; TORIKACHVILI, M. S.. Anelastic spectroscopy study of the metal-insulator transition of Nd1-xEuxNiO3. Physical Review. B, Condensed Matter and Materials Physics, v. 84, p. 125127-1-125127-10, 2011.
dc.identifier.doi10.1103/PhysRevB.84.125127
dc.identifier.issn1098-0121
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/1571
dc.relation.ispartofPhysical Review B - Condensed Matter and Materials Physics
dc.rightsAcesso Restrito
dc.titleAnelastic spectroscopy study of the metal-insulator transition of Nd 1-xEuxNiO3
dc.typeArtigo
fei.scopus.citations18
fei.scopus.eid2-s2.0-80053911447
fei.scopus.updated2024-05-01
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=80053911447&origin=inward
Arquivos
Coleções
Artigos