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dc.contributor.CRUESPUNIVERSIDADE ESTADUAL DE CAMPINASpt_BR
dc.contributor.authorunicampGandra, Flávio César Guimarãespt_BR
dc.typeArtigopt_BR
dc.titleKondo temperature and Heavy Fermion behavior in Yb1-xYxCuAl series of alloyspt_BR
dc.contributor.authorRojas, D. P.pt_BR
dc.contributor.authorGandra, F. G.pt_BR
dc.contributor.authorMedina, A. N.pt_BR
dc.contributor.authorFernández Barquín, L.pt_BR
dc.contributor.authorGómez Sal, J. C.pt_BR
dc.subjectResistividade elétricapt_BR
dc.subjectCalor específicopt_BR
dc.subjectTransição de fasept_BR
dc.subjectFérmions pesadospt_BR
dc.subjectKondo, Efeitopt_BR
dc.subject.otherlanguageElectrical resistivitypt_BR
dc.subject.otherlanguageSpecific heatpt_BR
dc.subject.otherlanguagePhase transitionpt_BR
dc.subject.otherlanguageHeavy fermionspt_BR
dc.subject.otherlanguageKondo effectpt_BR
dc.description.abstractResults on x-ray diffraction, electrical resistivity, specific heat and magnetization on the Yb1-xYxCuAl series of compounds are reported. The analysis of the x-ray data shows the increase of the unit cell volume with the Y dilution. The electrical resistivity shows an evolution from Kondo lattice regime for x <= 0.6 to single impurity behavior for x = 0.8 and 0.94. The electronic coefficient. shows values of Heavy Fermion systems along the series for 0 <= x< 1. On the other hand, dc magnetic susceptibility measurements show typical curves of intermediate valence systems with a maximum around 25 K. Below this maximum, the values of low temperature susceptibility (chi (0)) decrease with the increase of Y content. From the dependence of chi (0) and chi upon Y substitution, an increase of 12% of the Kondo temperature (T-K) for x = 0.8 alloy respect to the reference YbCuAl (x = 0) is estimated. This is further supported by the evolution of the temperature of the maximum in the magnetic contribution of the specific heat. The overall results can be explained by the increase of the hybridization as consequence of negative pressure effects obtained by the chemical substitution of Yb by Y, thus leading to the increase of T-K, in agreement with the Doniach's diagram.pt_BR
dc.relation.ispartofPhysica. B, Condensed matterpt_BR
dc.relation.ispartofabbreviationPhys. Bpt_BR
dc.publisher.cityAmsterdampt_BR
dc.publisher.countryHolandapt_BR
dc.publisherElsevierpt_BR
dc.date.issued2018pt_BR
dc.date.monthofcirculationMaypt_BR
dc.language.isoengpt_BR
dc.description.volume536pt_BR
dc.description.firstpage176pt_BR
dc.description.lastpage181pt_BR
dc.rightsfechadopt_BR
dc.sourceWOSpt_BR
dc.identifier.issn0921-4526pt_BR
dc.identifier.eissn1873-2135pt_BR
dc.identifier.doi10.1016/j.physb.2017.09.096pt_BR
dc.identifier.urlhttps://www.sciencedirect.com/science/article/pii/S0921452617306919pt_BR
dc.description.sponsorshipFAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOpt_BR
dc.description.sponsorship1FAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOpt_BR
dc.description.sponsordocumentnumber1998/10011-8pt_BR
dc.date.available2020-03-27T20:35:24Z-
dc.date.accessioned2020-03-27T20:35:24Z-
dc.description.provenanceMade available in DSpace on 2020-03-27T20:35:24Z (GMT). No. of bitstreams: 0 Previous issue date: 2018en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/337684-
dc.description.conferencenomeInternational Conference on Strongly Correlated Electron Systems (SCES)pt_BR
dc.description.conferencedate2017pt_BR
dc.description.conferencelocationPrague, CZECH REPUBLICpt_BR
dc.description.conferencepatrocinadorCharles University, Faculty of Mathematics and Physicspt_BR
dc.contributor.departmentDepartamento de Eletrônica Quânticapt_BR
dc.contributor.unidadeInstituto de Física Gleb Wataghinpt_BR
dc.subject.keywordYb alloyspt_BR
dc.subject.keywordIntermediate valencept_BR
dc.subject.keywordKondo temperaturept_BR
dc.identifier.source000431075600044pt_BR
dc.creator.orcid0000-0002-7630-7856pt_BR
dc.type.formArtigopt_BR
dc.description.sponsorNoteAgências de fomento estrangeiras apoiaram essa pesquisa, mais informações acesse artigopt_BR
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