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Long-lifetime fluorescence and crystal field calculation in Cr 4+-doped Li2MSiO4, M = Mg, Zn

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dc.contributor.author Jousseaume C.
dc.contributor.author Vivien D.
dc.contributor.author Kahn-Harari A.
dc.contributor.author Malkin B.
dc.date.accessioned 2018-09-17T20:52:32Z
dc.date.available 2018-09-17T20:52:32Z
dc.date.issued 2003
dc.identifier.issn 0925-3467
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/134187
dc.description.abstract The diffuse reflectance spectra of Cr:Li2MSiO4, M = Mg, Zn, indicate that in these compounds, chromium ions occur in the 4+, 5+, and 6+ oxidation states simultaneously. Under selective excitation in a Cr 4+ absorption band, a very long fluorescence decay time is observed for both compounds: ∼110 μs at room temperature and ∼300 μs at 30 K. These are by far the longest fluorescence lifetimes reported for Cr 4+ activated materials. In Cr4+:Li2MSiO 4, the 1E excited state level lies below the lowest component of the 3T2 level and the fluorescence decay time is dominated by the long-lifetime 1E level for which the transition to the ground state is spin-forbidden. The reverse situation occurs for the other Cr4+ doped compounds and their fluorescence lifetimes, governed by the short-lifetime 3T2 state, are only a few microseconds. A crystal field calculation, performed for Cr4+:Li 2MSiO4, confirms the above interpretation and supports the localization of Cr4+ at the silicon site in this compound. © 2003 Elsevier B.V. All rights reserved.
dc.relation.ispartofseries Optical Materials
dc.title Long-lifetime fluorescence and crystal field calculation in Cr 4+-doped Li2MSiO4, M = Mg, Zn
dc.type Conference Paper
dc.relation.ispartofseries-issue 1-2
dc.relation.ispartofseries-volume 24
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 143
dc.source.id SCOPUS09253467-2003-24-12-SID0141993692


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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