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Synthesis and study of the luminescent properties of terbium-activated gadolinium tantalum-niobate

Russian version

DOI: 10.21883/EOS.2022.02.53221.2759-21

Gusev G. A. ¹, Masloboeva S. M. ², Yagovkina M. A. ¹, Zamoryanskaya M. V. ¹

¹Ioffe Institute, St. Petersburg, Russia
²Tananaev Institute of Chemistry – Subdivision of the Federal Research Centre «Kola Science Centre of the Russian Academy of Sciences», Apatity, Russia

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For the first time, terbium-activated gadolinium tantalo-niobates were synthesized ((Gd_1-xTb_x)Nb_yTa_1-yO₄). The synthesis was carried out by the liquid-phase method. All studied materials had the main crystalline modification M GdNbO₄. The content of impurity phases did not exceed 2-5%. The photo- and cathodoluminescence spectra were studied. Concentration quenching of the terbium ion luminescence for a series of solid solutions containing tantalum ((Gd_1-xTb_x)Nb_0.9Ta_0.1O₄) occurs earlier than for pure gadolinium niobates ((Gd_1-xTb_x)NbO₄). The obtained materials are promising for use as scintillators. Keywords: gadolinium tantalum-niobates, liquid-phase synthesis, Tb³⁺, luminescence, cathodoluminescence.

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