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
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Growth, structure, Raman spectra and luminescence of orthorombic Li2Mg2(MoO4)3 crystals doped with Eu3+ and Ce3+ ions
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 Å, b=10.482 Å‚ с=17.614 Å). It exhibits strongly polarized Raman spectra with the most intense band at 905.2 cm−1. 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 (τ(5D0)=537 μs), Judd-Ofelt modeling (Ω2=21.811, Ω4=7.805 and Ω6=1.203 [10−20 сm2]) and the calculation of stimulated-emission cross-sections for the 5D0→7FJ′ (J′=0…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
نویسندگان
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