Structural studies of copper doped 2TeO2–PbO–Ag2O glass by FT-IR and Raman spectroscopiesR. C. Lucacel, I. C. Marcus, I. Ardelean and O. HulpusEur. Phys. J. Appl. Phys., 51 3 (2010) 30901DOI: https://doi.org/10.1051/epjap/2010120