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• W1616435513 startingPage "235603" @default.
• W1616435513 abstract "We investigated the single crystals of LiBaF(3) doped with Eu(2+) using high pressure spectroscopy, where high pressure was applied in a diamond anvil cell. Photoluminescence, time-resolved luminescence and luminescence kinetics at pressures from ambient to 200 kbar and at temperatures from 10 K to ambient were studied. At ambient conditions the luminescence spectra consisted of sharp lines peaked at 360 nm attributed to the [Formula: see text] transitions in the 4f(7) electronic configuration of Eu(2+) (the zero-phonon line and five single-phonon repetitions) and a broad band extending between 375 and 475 nm attributed to Eu(2+) trapped exciton recombination. When pressure was increased the Eu(2+) trapped exciton emission disappears and was replaced by the sharper band peaked at 355 nm, attributed to the [Formula: see text] transition in Eu(2+). To analyze the pressure dependence of luminescence spectra a model of impurity trapped excitons was developed. At temperatures lower than 50 K only the sharp lines related to [Formula: see text] transitions were observed for all pressures considered. Analysis of low temperature spectra allowed us to estimate the energies of the fifth phonon modes and the values of the Grüneisen parameters." @default.
• W1616435513 created "2016-06-24" @default.
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• W1616435513 date "2009-05-15" @default.
• W1616435513 modified "2023-10-10" @default.
• W1616435513 title "Pressure evolution of LiBaF₃:Eu²⁺luminescence" @default.
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• W1616435513 doi "https://doi.org/10.1088/0953-8984/21/23/235603" @default.
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