Electron spin resonance of Gd3+ in the antiferromagnetic heavy fermion CeIn3 and its reference compound LaIn3

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dc.contributor.authorBittar, E. M.
dc.contributor.authorDuque, J. G. S.
dc.contributor.authorVenegas, Pablo Antonio [UNESP]
dc.contributor.authorRettori, C.
dc.contributor.authorPagliuso, P. G.
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionUFS
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:26:21Z
dc.date.available2014-05-20T13:26:21Z
dc.date.issued2009-10-15
dc.description.abstractWe report temperature dependent electron spin resonance (ESR) experiments of Gd3+ in CeIn3 and in its reference compound LaIn3 taken in crushed single crystals. For LaIn3 a single Dysonian Gd3+ ESR line with a nearly temperature independent g similar to 2.020(5) is observed, and its linewidth follows a Korringa-like behavior as a function of temperature. From the Korringa rate (Delta H/Delta T similar to 16 Oe/K) and g-shift (Delta g similar to 0.027) we have extracted the exchange parameter between the Gd3+ local moments and the conduction electrons (ce) in this compound. This exchange parameter J(fs) approximate to 20 meV was found to be ce wave-vector independent. For CeIn3, the Gd3+ ESR spectra were found to be weakly temperature dependent and present partly resolved Gd3+ fine-structure. Interestingly, for CeIn3, the g-shift with respect to the g-value of Gd3+ in insulators is negative, in contrast to the positive g-shift found for Gd3+ in LaIn3. These results suggests different electronic structure at the Gd3+ site in the Kondo antiferromagnet host CeIn3. Possibly, Kondo effect may cause a decrease of the s-like conduction electron density of states at the Gd3+ site, giving arise to an exchange interaction only between the Gd3+ local moment and the Ce 4f electrons. (C) 2009 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil
dc.description.affiliationUFS, Nucleo Fis, BR-49500000 Itabaiana, SE, Brazil
dc.description.affiliationUniv Estadual Paulista, UNESP, Dept Fis, BR-17033360 Bauru, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, UNESP, Dept Fis, BR-17033360 Bauru, SP, 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.format.extent2995-2998
dc.identifierhttp://dx.doi.org/10.1016/j.physb.2009.07.028
dc.identifier.citationPhysica B-condensed Matter. Amsterdam: Elsevier B.V., v. 404, n. 19, p. 2995-2998, 2009.
dc.identifier.doi10.1016/j.physb.2009.07.028
dc.identifier.issn0921-4526
dc.identifier.lattes823643293913690
dc.identifier.orcid0000-0002-5819-0957
dc.identifier.urihttp://hdl.handle.net/11449/8484
dc.identifier.wosWOS:000271357300029
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofPhysica B: Condensed Matter
dc.relation.ispartofjcr1.453
dc.relation.ispartofsjr0,417
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectHeavy fermionsen
dc.subjectCeIn3en
dc.subjectElectron spin resonance (ESR)en
dc.subjectElectronic structureen
dc.titleElectron spin resonance of Gd3+ in the antiferromagnetic heavy fermion CeIn3 and its reference compound LaIn3en
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes823643293913690[3]
unesp.author.orcid0000-0002-5819-0957[3]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências, Baurupt
unesp.departmentFísica - FCpt

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