Electron paramagnetic resonance of Fe3+ ions in Bi2O3-PbO-Fe2O3 glasses

The room temperature EPR study of Fe3+ ions in Bi2O3-PbO-Fe2O3 glasses has been carried out for different molar percentages of Fe2O3. Spectra recorded at different molar strengths of Fe2O3 in the glass differ from one another . In each spectrum, there is more than one line. 'g' values of all the line s in each spectrum have been determined. Explanation of the origin of each spectral line has been attempted. On the measurement of the density of glas ses, it was found that when the concentration of Fe2O3 was increased at the cost of PbO concentration, the overall density decreased. It was also obse rved that the d.c. conductivity of the glasses increases with the increase of Fe2O3 content. (C) 2001 Elsevier Science BY All rights reserved.