Mössbauer and infrared studies of manganese doped iron borate glasses

Abstract

The infrared absorption spectra of Manganese-doped Iron borate glasses (X=0,10,15,20&30 mol% MnO) have been investigated to find out the role played by Manganese on the structure of these glasses. MnO was gradually introduced to replace Fe₂O₃ in the series of manganese doped iron borate glasses containing 60% B₂O₃ . The structural changes induced were consistent with Mn₂O₃ formulation and were inferred by monitoring the I.R. spectra of these glasses in the range 200-4000 cm^-1 by KBr Technique. The similar ionic radii of Fe³⁺ and Mn³⁺ cause no structural changes in either series as observed from infrared spectroscopy, which show that the Fe³⁺ ions concentration at B-site is replaced by Mn³⁺ ions. Mössbauer Technique was applied to study the effect of manganese doping at the Fe site for all the samples.