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EPR spectroscopic studies in (30 − x) Li2O-xK2O-10CdO-59B2O3-1MnO2 multi-component glass system |
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| Authors: | P Gangapur Goverdhan Reddy Turpu K Puram |
| Institution: | a Department of Physics, Kakatiya University, Warangal 506 009, India b Department of Physics, Osmania University, Hyderabad 500 007, India c Department of Physics & Graphene Research Institute, Sejong University, Seoul 143-747, Republic of Korea |
| Abstract: | EPR studies were carried out in (30 - x) Li2O-xK2O-10CdO-59B2O3-1MnO2 multi-component glass system to understand the effect of the variation in the alkali ratios on the EPR parameters. The observed EPR spectra of Mn2+ ion exhibits resonances at g = 2.0, 3.3 and 4.3. The resonance at g = 2.0 is due to Mn2+ ions in an environment close to the octahedral symmetry, where as the resonances at g = 3.3 & 4.3 are due to the rhombic surroundings of Mn2+ ions. Hyperfine splitting constant values at g = 2.0 and number of paramagnetic centers & paramagnetic susceptibility at different observed resonances were evaluated. These parameters show non linear variation with progressive substitution of Li+ ion with K+ ions may be due to the changes in cation field strengths and local structural variation due to the variation in mixed alkali ion ratios. |
| Keywords: | Borate glasses Electron paramagnetic resonance (EPR) Mixed alkali effect (MAE) |
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