Manifestation of Nd ions on the structure, Raman and IR spectra of (TeO2-MoO-Nd2O3) glasses

摘要

The structure of [80TeO2 + (20–x)MoO + xNd2O3] glasses, with x = 0, 4, 6, 10 and 12 mol%, is studied in this work. Raman scattering in the spectral range (−2000 to 3500 cm−1) and IR absorption spectra have been measured for crystalline TeO2 and glasses, and their assignments were discussed and compared. Many vibrational modes were found active in both Raman and IR and their assignments for crystalline TeO2 and for the glasses were discussed in relation to the tetragonal structure of crystalline α -TeO2. Nd2O3 was found to completely eliminate diffuse scattering and enhance the Raman scattering intensity. Anti-stokes Raman bands in the range −1460 cm− 1 to −1975 cm− 1 were observed for both (30Li2O + 70B2O3+ xNd2O3) glasses and [80TeO2 + (20−x)MoO + xNd2O3] glasses and were attributed to some emission processes due to the doping of the glasses with Nd2O3.