Abstract
The spectral and structural characteristics of polycrystals of Eu3+-doped lutetium borates Lu1 − x Eu x BO3) annealed at different temperatures have been investigated over a wide range of europium concentrations. The conditions for the preparation of Lu1 − x Eu x BO3 in the calcite and vaterite phases have been determined. It has been found that there is a radical difference between the excitation spectra of the main emission bands of the calcite and vaterite phases of the Lu1 − x Eu x BO3 borates. The influence of the europium concentration on the structure of Lu1 − x Eu x BO3 has been analyzed. It has been established that, at europium concentrations of higher than 15 at %, only the vaterite structure is formed independently of the annealing temperature. Thus, by varying the Eu3+ concentration and the annealing temperature of Lu1 − x Eu x BO3, it is possible to directionally synthesize a specific structural modification and, consequently, to control the spectral characteristics of this compound.
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Original Russian Text © S.Z. Shmurak, V.V. Kedrov, A.P. Kiselev, I.M. Smyt’ko, 2015, published in Fizika Tverdogo Tela, 2015, Vol. 57, No. 1, pp. 19–28.
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Shmurak, S.Z., Kedrov, V.V., Kiselev, A.P. et al. Spectral characteristics of different structural modifications of Lu1 − x Eu x BO3 . Phys. Solid State 57, 18–29 (2015). https://doi.org/10.1134/S1063783415010278
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DOI: https://doi.org/10.1134/S1063783415010278