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Samarium doped Na$_2$O-ZnO-TeO$_2$ (NZT) glasses were prepared by the meltquenching method. The glass-forming ability and glass stability of preparedglass was estimated by Hruby parameter using Differential Thermal Analysis(DTA) and Thermo-gravimetric Analysis (TGA). The study of FTIR spectra andX-ray diffraction described the ionic nature and the amorphous pattern of glassrespectively. The absorption peaks were observed for the transitions6H5/2-4P3/2 at 402 nm,6H5/2-4M19/2 at 418 nm, 6H5/2-4I15/2 at 462 nm and6H5/2-4I11/2 at 478 nm in the absorption spectra. The optical band gap energy(Eg) was calculated and observed to be decreased from 2.95 eV to 1.50 eV withdoping concentration. The visible emission band was observed in the Sm3+ dopedglass samples. The variation of dielectric constant with frequency was found tobe independent for the frequency range 3 kHz - 2 MHz. The measurement oftemperature-dependent dc conductivity showed Arrhenius type mechanism ofconduction.

Enhancement of optical properties and dielectric nature of Sm$_3$+doped Na$_2$O-ZnO-TeO$_2$ Glass materials