Structure, thermal and spectroscopic properties of Cu2+ ions doped 59B2O3–10K2O–(30-x)ZnO–xBaO (0 ≤ x ≤ 30) glass system

Abstract X-ray diffraction (XRD), differential scanning calorimetry (DSC), Fourier transform infrared (FTIR), electron paramagnetic resonance (EPR) and optical absorption studies on 59B 2 O 3 –10K 2 O–(30-x)ZnO–xBaO–1CuO glasses (where x = 0, 6, 12, 18, 24 and 30 mol%) have been carried out. The amorphous nature of the glasses was confirmed using XRD and DSC measurements. The glass transition temperature (T g ) of glass samples has been estimated from DSC traces and found that the T g increases with increasing BaO content. The IR studies have showed that the present glass system consists of [BO 3 ] and [BO 4 ] units in various borate groups. The spin-Hamiltonian parameters (SHP) such as g || , g ⊥ , and A || have been determined from EPR spectra and it was found that the Cu 2 + ion is in tetragonal distorted octahedral site with d x 2 ‐y 2 as the ground state. Bonding parameters and bonding symmetry of Cu 2 + ions have been calculated by correlating EPR and optical data and were found to be composition dependent.