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dc.contributor.authorMarcano, N.pt_BR
dc.contributor.authorGómez Sal, J.C.pt_BR
dc.contributor.authorEspeso, José Ignaciopt_BR
dc.contributor.authorDe Teresa, J.M.pt_BR
dc.contributor.authorAlgarabel, P.A.pt_BR
dc.contributor.authorPaulsen, C.pt_BR
dc.contributor.authorIglesias, Jose Robertopt_BR
dc.date.accessioned2014-08-09T02:11:35Zpt_BR
dc.date.issued2007pt_BR
dc.identifier.issn0031-9007pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/99400pt_BR
dc.description.abstractWe present evidence for the existence of magnetic clusters of approximately 20 Å in the strongly correlated alloy system CeNi1-xCux (0.7 ≤ x ≤ 0.2) based on small angle neutron scattering experiments as well as the occurrence of staircaselike hysteresis cycles at very low temperature (100 mK). An unusual feature is the observation of long-range ferromagnetic order below the cluster-glass transition without any indication of a sharp transition at a Curie temperature. These observations strongly support a phenomenological model where a percolative process connects both magnetic states. The model can account for all the puzzling data previously obtained in this system, providing a new perspective with regard to the magnetic ground state of other alloyed compounds with small magnetic moments or weak ferromagnetism with intrinsic disorder effects.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofPhysical review letters. Vol. 98, no. 16 (Apr. 2007), 166406 4p.pt_BR
dc.rightsOpen Accessen
dc.subjectLigas de cériopt_BR
dc.subjectLigas de cobrept_BR
dc.subjectMateriais ferromagnéticospt_BR
dc.subjectAglomerados metálicospt_BR
dc.subjectDifração de nêutronspt_BR
dc.subjectMomentos magnéticospt_BR
dc.subjectHisteresept_BR
dc.subjectTransicao vitreapt_BR
dc.titleMesoscopic magnetic states in metallic alloys with strong electronic correlations : a percolative scenario for CeNi/sub 1-x/Cu/sub x/pt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000595640pt_BR
dc.type.originEstrangeiropt_BR


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