Zh. X Cheng, Sh. J. Zhang, J. R. Han, H. Ch. Chen, X. S. Liu, Y.Y Yang, J. Yang: Growth and Optical Properties of NaY(WO<SUB>4</SUB>)<SUB>2</SUB>:Eu Crystals

Crystal Research and Technology

Cryst. Res. Technol. 36 (2001) 135 - Abstract -

Zh. X Cheng, Sh. J. Zhang, J. R. Han, H. Ch. Chen, X. S. Liu*, Y.Y Yang*, J. Yang*

State Key Lab of Crystal Materials, Shandong University, Jinan,P.R.China
*Coretech Crystal Company, Shandong University, P.R. China

Growth and Optical Properties of NaY(WO₄)₂:Eu Crystals

NaY_0.99Eu_0.01(WO₄)₂ crystals were grown along <101> and <001> directions. Single crystals with high quality can be obtained when they were grown along <101> direction from a melt with a small deviation from stoichiometric composition. Eu ions exist in two valences in the as-grown crystals, in one valence after annealing only. The fluorescence spectrum shows the Stark splitting of energy levels of Eu ions is in accordance with the site symmetry of S₄.

Keywords: crystal growth, optical properties

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