Glass Physics and Chemistry

, Volume 31, Issue 4, pp 420–426 | Cite as

Dependence of the Spectroscopic Properties of Europium on the Spatial Distribution of Rare-Earth Ions in Fluorophosphate Glasses

  • T. V. Bocharova
  • G. O. Karapetyan
  • A. M. Mironov
  • N. O. Tagil’tseva
  • O. V. Yanush
Proceedings of the Topical Meeting of the European Ceramic Society “Nanoparticles, Nanostructures, and Nanocomposites” (St. Petersburg, Russia, July 5–7, 2004)


Doped fluorophosphate glasses containing 4–13 mol % Ba(PO3)2 have been studied. Analysis of the Raman spectra has revealed that the structure of glasses containing up to 1 mol % Ba(PO3)2 involves isolated [PO4] tetrahedra. An increase in the Ba(PO3)2 content brings about the formation of pyrophosphate groups, which are dominant in the glass containing 11 mol % Ba(PO3)2. The introduction of up to 2 mol % EuF3 into the glasses containing 5 and 7 mol % Ba(PO3)2 leads to a decrease in the Landau-Placzek ratio. This is interpreted within the model of segregation of dopant ions. From analyzing the induced absorption spectra, the content of Eu3+ ions with a predominantly phosphate environment is estimated at ∼0.005 mol %. It is shown that, for the glasses containing 4 mol % Ba(PO3)2, the intensity ratio of the Eu3+ luminescence bands attributed to the 5D0-7F1 and 5D0-7F2 transitions changes with an increase in the EuF3 content from 0.01 to 2.0 mol %. This dependence of the intensity ratio on the EuF3 content exhibits a maximum at 0.5 mol % EuF3, which is explained by the change in the local environment of the rare-earth ion.


Phosphate Physical Chemistry Europium Spatial Distribution Absorption Spectrum 
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Copyright information

© MAIK “Nauka/Interperiodica” 2005

Authors and Affiliations

  • T. V. Bocharova
    • 1
  • G. O. Karapetyan
    • 1
  • A. M. Mironov
    • 1
  • N. O. Tagil’tseva
    • 2
  • O. V. Yanush
    • 3
  1. 1.St. Petersburg State Polytechnical UniversitySt. PetersburgRussia
  2. 2.St. Petersburg State Technological Institute (Technical University)St. PetersburgRussia
  3. 3.St. Petersburg Technological University of Plant PolymersSt. PetersburgRussia

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