Thermally activated exchange narrowing of the Gd3+ ESR fine structure in a single crystal of Ce1-xGdxFe 4P12 (x-0.001) skutterudite

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Autor(es): dc.contributorUniversidade Estadual de Campinas (UNICAMP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade Federal do ABC (UFABC)-
Autor(es): dc.contributorUniversity of California-
Autor(es): dc.contributorFlorida State University-
Autor(es): dc.contributorSan Diego State University-
Autor(es): dc.creatorGarcia, F. A.-
Autor(es): dc.creatorVenegas, P. A.-
Autor(es): dc.creatorPagliuso, P. G.-
Autor(es): dc.creatorRettori, C.-
Autor(es): dc.creatorFisk, Z.-
Autor(es): dc.creatorSchlottmann, P.-
Autor(es): dc.creatorOseroff, S. B.-
Data de aceite: dc.date.accessioned2025-08-21T19:29:07Z-
Data de disponibilização: dc.date.available2025-08-21T19:29:07Z-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2011-09-09-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1103/PhysRevB.84.125116-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/226555-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/226555-
Descrição: dc.descriptionWe report electron spin resonance (ESR) measurements in the Gd3+ doped semiconducting filled skutterudite compound Ce1-xGd xFe4P12 (x-0.001). As the temperature T varies from T- 150 K to T- 165 K, the Gd3+ ESR fine and hyperfine structures coalesce into a broad inhomogeneous single resonance. At T- 200 K the line narrows and as T increases further, the resonance becomes homogeneous with a thermal broadening of 1.1(2) Oe/K. These results suggest that the origin of these features may be associated with a subtle interdependence of thermally activated mechanisms that combine: (i) an increase with T of the density of activated conduction carriers across the T-dependent semiconducting pseudogap; (ii) the Gd3+ Korringa relaxation process due to an exchange interaction JfdS.s between the Gd3+ localized magnetic moments and the thermally activated conduction carriers; and (iii) a relatively weak confining potential of the rare earth ions inside the oversized (Fe 2P3)4 cage, which allows the rare earths to become rattler Einstein oscillators above T- 148 K. We argue that the rattling of the Gd3+ ions, via a motional narrowing mechanism, also contributes to the coalescence of the ESR fine and hyperfine structure. © 2011 American Physical Society.-
Descrição: dc.descriptionInstituto de Física Gleb Wataghin UNICAMP, C.P. 6165, Campinas-SP 13083-970-
Descrição: dc.descriptionUNESP-Universidade Estadual Paulista Departamento de Física Faculdade de Ciências, C.P. 473, Bauru-SP 17033-360-
Descrição: dc.descriptionCentro de Ciências Naturais e Humanas Universidade Federal Do ABC, Santo Andre-SP 09210-170-
Descrição: dc.descriptionUniversity of California, Irvine, CA 92697-
Descrição: dc.descriptionDepartment of Physics Florida State University, Tallahassee, FL 32306-
Descrição: dc.descriptionSan Diego State University, San Diego, CA 92182-
Descrição: dc.descriptionUNESP-Universidade Estadual Paulista Departamento de Física Faculdade de Ciências, C.P. 473, Bauru-SP 17033-360-
Idioma: dc.languageen-
Relação: dc.relationPhysical Review B - Condensed Matter and Materials Physics-
???dc.source???: dc.sourceScopus-
Título: dc.titleThermally activated exchange narrowing of the Gd3+ ESR fine structure in a single crystal of Ce1-xGdxFe 4P12 (x-0.001) skutterudite-
Tipo de arquivo: dc.typelivro digital-
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