Exchange narrowing effects in the EPR linewidth of Gd diluted in Ce compounds

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorVenegas, Pablo Antonio
dc.creatorNetto, PRS
dc.date2014-05-20T15:29:07Z
dc.date2016-10-25T18:04:19Z
dc.date2014-05-20T15:29:07Z
dc.date2016-10-25T18:04:19Z
dc.date1998-06-01
dc.date.accessioned2017-04-06T00:10:27Z
dc.date.available2017-04-06T00:10:27Z
dc.identifierJournal of Applied Physics. Woodbury: Amer Inst Physics, v. 83, n. 11, p. 6958-6960, 1998.
dc.identifier0021-8979
dc.identifierhttp://hdl.handle.net/11449/38768
dc.identifierhttp://acervodigital.unesp.br/handle/11449/38768
dc.identifier10.1063/1.367745
dc.identifierWOS:000077795500244
dc.identifierWOS000077795500244.pdf
dc.identifierhttp://dx.doi.org/10.1063/1.367745
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/881817
dc.descriptionAnomalous thermal behavior on the EPR linewidths of Gd impurities diluted in Cc compounds has been observed. In metals, the local magnetic moment EPR linewidth, Delta H, is expected to increase linearly with the temperature. In contrast, in CexLa1-xOs2 the Gd EPR spectra show a nonlinear increase. In this work, the mechanisms that are responsible for the thermal behavior of the EPR lines in CexLa1-xOs2 are examined. We show that the exchange interaction between the local magnetic moments and the conduction electrons are responsible for the narrowing of the spectra at low temperatures. At high temperatures, the contribution to the linewidth of the exchange interaction between the local magnetic moments and the Ce ions has an exponential dependence on the excitation energy of the intermediate valent ions. A complete fitting of the EPR spectra for powdered samples is obtained, (C) 1998 American Institute of Physics. [S0021-8979(98)39911-9].
dc.languageeng
dc.publisherAmerican Institute of Physics (AIP)
dc.relationJournal of Applied Physics
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.titleExchange narrowing effects in the EPR linewidth of Gd diluted in Ce compounds
dc.typeOtro


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