EPR and optical absorption studies on manganese ion doped in mixed alkali cadmium phosphate glasses

Abstract

Electron paramagnetic resonance (EPR) spectra of Mn(II) ions in cadmium phosphate glasses are presented with mixed alkali variation as xLi2O + (20 - x) Na2O + 20 CdO + 59.5 P2O5 + 0.5 MnO glass system with 5 ≤ × ≤ 15 mol%. The EPR spectra of Mn(II) ions doped samples exhibit a sextet centered at g = 2.0. The optical absorption spectrum at room temperature shows three bands for Mn(II) ions in octahedral symmetry. The crystal field (Dq) and Racah parameters (B and C) are evaluated. From EPR and optical spectral studies reveals the nature of the bonding is dominantly ionic and its site symmetry is octahedral. At equal composition of alkali content, i.e. for x = 10 the glass system shows the mixed alkali effect. © 2009 IOP Publishing Ltd.