The structural, optical and magnetic parameter of manganese doped strontium zinc borate glasses

Glasses with composition 10SrO:(30 - x)ZnO:60B(2)O(3):xMnO, 0 <= x <= 0.9 (all compositions in wt%) have been prepared and investigated by X-ray diffraction, EPR, Optical absorption and FT-IR spectroscopic techniques. The XRD pattern of all the glasses confirmed the formation of an amorphous structure. The EPR spectra of all glass sampples exhibit resonance signals at g approximate to 2.0 with a sextet of hyperfine lines. The spin concentration (N) and temperature dependence of EPR signals were studied for Mn2+ ions in strontium zinc borate glass samples. The zero-field splitting parameter D has been evaluated from the intensities of the allowed hyperfine lines. The paramagnetic susceptibility (chi) was calculated from EPR data at different temperatures and the Curie temperature (theta(p)) was calculated from the 1/chi verses T graph. The optical absorption spectra exhibit a single broad band 470 nm and this has been attributed to the spin-allowed E-5(g) -> T-5(2g) transition of Mn3+ ions in octahedral symmetry. The theoretical optical basicity (Lambda(th)) of these glasses have also been evaluated. The FTIR studies show BO3 and BO4 structural untis in strontium zinc borate galsses. (c) 2012 Elsevier B.V. All rights reserved