Structure, optical and magnetic properties of barium sodium borate/cobalt oxide glass structures

In the present work barium sodium borate glass samples with the nominal compositions 55B2O3 +(25-x)BaF2 + 20Na2O + xCo3O4 where x = 0, 0.5, 1, 0.75, 1.5, and 2 mol % were prepared by the conventional melt-quenching technique. The structural, thermal, optical and magnetic characteristics of Co doped barium sodium borate glasses have been considered. The amorphous nature of the prepared glass samples were confirmed by X-ray diffraction (XRD) spectra. Fourier-Transform Infrared spectroscopy (FTIR) has been recorded in the range of 4000–400 cm− 1 to estimate the vibrational and dynamics of cobalt doped barium sodium borate glass samples. Differential thermal analysis (DTA) was used to perform the glass transition investigations. The values of Tg and TC significantly improved with increasing cobalt oxide concentration, according to (DTA) thermal analysis.UV–Vis spectra of the prepared glass samples were detected over the range of 200–2500 nm. The optical absorption spectra were used to estimate optical energy band gaps of the prepared glasses. It was observed that the direct and indirect optical band gaps were decreased with increasing Co3O4 content. The magnetization hysteresis loops for prepared glass system has been estimated. The coercivity of the glass samples for all Co3O4 content is small and the magnetization saturation increased from 0.2 to 0.58 esu/g as the concentration of Co3O4 varied from 0.0 to 2.0 mol%.