کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5397743 | 1505873 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Growth, structure, Raman spectra and luminescence of orthorombic Li2Mg2(MoO4)3 crystals doped with Eu3+ and Ce3+ ions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
We report on the growth and the structural, thermal, vibronic and spectroscopic properties of a complex molybdate single-crystal, Li2Mg2(MoO4)3 (LiMgMo), doped with Eu3+ or Ce3+ ions. Few cm size crystals were grown from the flux using Li2MoO4 as a solvent. Eu:LiMgMo is orthorhombic (sp. gr. Pnma, а=5.085 Ã
, b=10.482Â Ã
â Ñ=17.614Â Ã
). It exhibits strongly polarized Raman spectra with the most intense band at 905.2 cmâ1. Eu:LiMgMo possesses positive thermal expansion. Using the Eu3+ ion as a structural probe, we argue its predominant accommodation in a single type of site A(3) with a trigonal prismatic coordination. The spectroscopy of Eu3+ is characterized by the lifetime measurement (Ï(5D0)=537 μs), Judd-Ofelt modeling (Ω2=21.811, Ω4=7.805 and Ω6=1.203 [10â20 Ñm2]) and the calculation of stimulated-emission cross-sections for the 5D0â7FJâ² (Jâ²=0â¦6) transitions. The LiMgMo crystals are promising for rare-earth-ion doping with application as laser materials and Raman shifters.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 188, August 2017, Pages 154-161
Journal: Journal of Luminescence - Volume 188, August 2017, Pages 154-161
نویسندگان
P. Loiko, E.V. Vilejshikova, A.A. Volokitina, V.A. Trifonov, J.M. Serres, X. Mateos, N.V. Kuleshov, K.V. Yumashev, A.V. Baranov, A.A. Pavlyuk,