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FT-IR and EPR spectroscopic studies of B2O3–Bi2O3–Gd2O3 glasses

I. ARDELEAN1,* , L. GRIGUTA1

Affiliation

  1. Faculty of Physics, Babes-Bolyai University, 400084, Cluj-Napoca, Romania

Abstract

Glasses from xGd2O3·(100-x)[B2O3⋅Bi2O3] system with 0≤x≤10 mol% have been prepared and than studied by means of FTIR absorption and electron paramagnetic resonance (EPR) measurements. FT-IR data indicate in the studied glasses the presence of the BO3, BO4, BiO6 and BiO3 units and its proportion dependence of the Gd2O3. The EPR spectra of these glasses reveal resonance sites with an unexpected high crystalline field in addition to the “U” spectrum, typical for Gd3+ ions in disordered systems. These absorption lines are due to the Gd3+ ions that can partially replace Bi3+ ions from the host glass matrix and could play the network unconventional former role in the studied glasses..

Keywords

Bismuth-borate glasses, Gadolinium ions, FT-IR, EPR.

Submitted at: March 2, 2007
Accepted at: July 15, 2007

Citation

I. ARDELEAN, L. GRIGUTA, FT-IR and EPR spectroscopic studies of B2O3–Bi2O3–Gd2O3 glasses, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 7, pp. 2068-2070 (2007)