EPR, optical and physical studies on Mn²⁺ -doped MgO-BaO-B₂O₃ glasses

xMgO-(30-x)BaO-69.5B₂O₃ glass systems were synthesized with the doping of transition metal ions (Mn²⁺) by applying the melt quench method. These glass systems are then observed using analysis by XRD, UV-VIS absorption and electron paramagnetic resonance. Mn²⁺ absorption spectrum has its own broadband at about 21000 cm^-1 (476 nm), which is ascribed to be of 6A_1g(S) → ⁴T_1g (G) transition. The typical six-line hyperfine structure with a core at g ≈ 2.0 was observed in the Mn²⁺ EPR spectra. The close octahedral site symmetry for the Mn²⁺ contamination ions was established by spectroscopic examinations of the obtained data. Structural transformations were discovered using Fourier transform infrared and Raman spectra. Assessments were done on several physical parameters, together with density, refractive index, optical basicity, molar volume, energy gap, Urbach energy and interaction parameter. K. (author)