1. Growth, structure, Raman spectra and luminescence of orthorombic Li2Mg2(MoO4)3 crystals doped with Eu3+ and Ce3+ ions
- Author
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Mateos, X., Loiko, P., Vilejshikova, E.V., Volokitina, A.A., Trifonov, V.A., Serres, J.M., Kuleshov, N.V., Yumashev, K.V., Baranov, A.V., Pavlyuk, A.A., Física i Cristal.lografia de Materials, Química Física i Inorgànica, and Universitat Rovira i Virgili
- Subjects
Cristalls--Creixement ,crystal growth ,Chemistry ,Crystal structure ,luminescence ,Luminescència ,Química ,0022-2313 - Abstract
Filiació URV: SI 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, ¿=5.085 Å, b=10.482 Å¿ ¿=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 (¿(5D0)=537 ¿s), Judd-Ofelt modeling (¿2=21.811, ¿4=7.805 and ¿6=1.203 [10¿20 ¿m2]) 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.
- Published
- 2017
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