Abstract
ZnO–Sb2O3–B2O3 glasses containing different concentrations of MnO ranging from 0 to 1.0 mol% were prepared. A number of studies, viz. optical absorption, infrared and ESR spectra and magnetic susceptibility, were carried out as a function of manganese ion concentration. The analysis of the results indicate that manganese ions mostly exist in Mn2+ state in these glasses when the concentration of MnO≤0.6 mol% and above this concentration, these ions seem to exist in Mn3+ state in the glass network.
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