Synthesis and Luminescent Properties of Bismuth Titanates Bi{sub 1.6}Ho{sub x}Ti{sub 2}O{sub 7 – δ} and Bi{sub 1.6}Mg{sub 0.1}Ho{sub x}Ti{sub 2}O{sub 7 – δ}

Pyrochlores Bi{sub 1.6}Ho{sub x}Ti{sub 2}O{sub 7 – δ} and Bi{sub 1.6}Mg{sub 0.1}Ho {sub x}Ti{sub 2}O{sub 7 – δ}, where x = 0, 0.01, 0.05, and 0.1, and Bi{sub 1.5}Ho{sub x}Ti{sub 2}O{sub 7 – δ}, where x = 0.25 and 0.5, have been synthesized and their structural, optical, and luminescence properties h...

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Bibliographic Details
Published in:Physics of the solid state 2019-05, Vol.61 (5)
Main Authors: Ishchenko, A. V., Koroleva, M. S., Vlasov, M. I., Istomina, E. I., Piir, I. V.
Format: Article
Language:English
Subjects:
BISMUTH COMPOUNDS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRONS
ENERGY-LEVEL TRANSITIONS
HOLMIUM IONS
IMPURITIES
LUMINESCENCE
PYROCHLORE
SYNTHESIS
THEORETICAL DATA
TITANATES
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Summary:Pyrochlores Bi{sub 1.6}Ho{sub x}Ti{sub 2}O{sub 7 – δ} and Bi{sub 1.6}Mg{sub 0.1}Ho {sub x}Ti{sub 2}O{sub 7 – δ}, where x = 0, 0.01, 0.05, and 0.1, and Bi{sub 1.5}Ho{sub x}Ti{sub 2}O{sub 7 – δ}, where x = 0.25 and 0.5, have been synthesized and their structural, optical, and luminescence properties have been studied. As a result of analyzing the data obtained experimentally and the available theoretical data, it is shown that the intrinsic luminescence of the samples is due to the O2p ↔ Bi6p and Bi6s ↔ Bi6p electron transitions and the impurity luminescence is due to the f–f transitions in Ho{sup 3+} and the O2p → Ho{sup 3+} charge transfer.
ISSN:1063-7834
1090-6460