Coexisting on-center and off-center Yb3+ sites in Ce1-xYbxFe4P12 skutterudites

dc.creatorGarcia, FA
dc.creatorGarcia, DJ
dc.creatorAvila, MA
dc.creatorVargas, JM
dc.creatorPagliuso, PG
dc.creatorRettori, C
dc.creatorPasseggi, MCG
dc.creatorOseroff, SB
dc.creatorSchlottmann, P
dc.creatorAlascio, B
dc.creatorFisk, Z
dc.date2009
dc.dateAUG
dc.date2014-11-15T04:19:14Z
dc.date2015-11-26T17:35:55Z
dc.date2014-11-15T04:19:14Z
dc.date2015-11-26T17:35:55Z
dc.date.accessioned2018-03-29T00:18:16Z
dc.date.available2018-03-29T00:18:16Z
dc.identifierPhysical Review B. Amer Physical Soc, v. 80, n. 5, 2009.
dc.identifier1098-0121
dc.identifierWOS:000269638500007
dc.identifier10.1103/PhysRevB.80.052401
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/78849
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/78849
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/78849
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1285747
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionElectron-spin-resonance (ESR) measurements performed on the filled skutterudite system Ce1-xYbxFe4P12 (x less than or similar to 0.003) unequivocally reveal the coexistence of two Yb3+ resonances associated with sites of considerably different occupations and temperature behaviors. Detailed analysis of the ESR data suggests a scenario where the fraction of oversized (Fe2P3)(4) cages that host Yb ions are filled with a low occupation of on-center Yb3+ sites and a highly occupied T-dependent distribution of off-center Yb3+ sites. Analysis of the Yb-171(3+)(I=1/2) isotope hyperfine splittings reveal that these two sites are associated with a low (similar to 1 GHz) and a high (greater than or similar to 15 GHz) rattling frequency, respectively. Our findings introduce Yb3+ in T-h symmetry systems and use the Yb3+ ESR as a sensitive microscopic probe to investigate the Yb3+ ions dynamics.
dc.description80
dc.description5
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionDOE [DE-FG02-98ER45707]
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionDOE [DE-FG02-98ER45707]
dc.languageen
dc.publisherAmer Physical Soc
dc.publisherCollege Pk
dc.publisherEUA
dc.relationPhysical Review B
dc.relationPhys. Rev. B
dc.rightsaberto
dc.rightshttp://publish.aps.org/authors/transfer-of-copyright-agreement
dc.sourceWeb of Science
dc.subjectcerium alloys
dc.subjectcrystal symmetry
dc.subjecthyperfine interactions
dc.subjectiron alloys
dc.subjectisotope effects
dc.subjectparamagnetic resonance
dc.subjectphosphorus alloys
dc.subjectytterbium alloys
dc.subjectElectron-spin Resonance
dc.subjectAbsorption
dc.subjectLafe4p12
dc.subjectMetals
dc.subjectFields
dc.titleCoexisting on-center and off-center Yb3+ sites in Ce1-xYbxFe4P12 skutterudites
dc.typeArtículos de revistas


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