Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/6122
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dc.contributor.authorMonteiro, T.pt
dc.contributor.authorSoares, M.J.pt
dc.contributor.authorSantos, L.pt
dc.contributor.authorBoemare, C.pt
dc.contributor.authorCascalheira, J.pt
dc.contributor.authorAlves, L.C.pt
dc.contributor.authorAlves, E.pt
dc.date.accessioned2012-02-09T16:06:03Z-
dc.date.issued2002-
dc.identifier.issn1042-0150pt
dc.identifier.urihttp://hdl.handle.net/10773/6122-
dc.description.abstractSapphire single crystals implanted with different fluences of cobalt and subjected to annealing treatments in vacuum and in air during 1 h at 1000 degreesC were studied by optical and structural techniques. At room temperature the absorption mainly occurs in the ultraviolet (UV) being the luminescence dominated by a UV/blue broad emission band and a highly structured red emission. Structural analysis indicates that metallic precipitates, CoAl2O4 and CoO phases are present in the implanted and annealed samples depending either on the fluence and on the annealing atmosphere. The observed luminescence cannot be correlated with intra-ionic Co2+ and Co3+ in an Al3+ site in the sapphire lattice and a tentative assignment of the observed emission lines to the presence of aggregates is made.pt
dc.language.isoengpt
dc.publisherTaylor & Francispt
dc.relation.urihttp://www.scopus.com/inward/record.url?eid=2-s2.0-28244435765&partnerID=40&md5=7d2d510992e24c669a29c29ce6d13325
dc.rightsrestrictedAccesspor
dc.subjectPrecipitatespt
dc.subjecta-Al2O3pt
dc.subjectOptical propertiespt
dc.titleLuminescence studies of Co implanted sapphirespt
dc.typearticlept
dc.peerreviewedyespt
ua.distributioninternationalpt
degois.publication.firstPage1117pt
degois.publication.issue6-12pt
degois.publication.issue6-12
degois.publication.lastPage1122pt
degois.publication.titleRadiation Effects and Defects in Solidspt
degois.publication.volume157pt
dc.date.embargo10000-01-01-
dc.identifier.doi10.1080/10420150215824*
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