Abstract
The optical, magnetic and structural properties of Eu doped low silica calcium aluminosilicateglasses were investigated. The optical absorption coefficient presented two bands at 39 246 and29 416 cm−1, which were assigned respectively to the , and transitions of Eu2+. The fluorescence measured at 300 K on a sample doped with 0.5 wt% ofEu2O3 exhibited a broadband centered at 17 350 cm−1, which is attributed to the transition of Eu2+, whereas the additional peaks are due to the transitions of Eu3+. From magnetization and XANES data it was possible to evaluate the fractions ofEu2+ andEu3+ for the sample doped with 0.5 and 5.0 wt% ofEu2O3, the values of which were approximately 30 and 70%, respectively.
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