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EPR and Optical Absorption Studies of Cu2+ Doped MgO-Li2O-B2O3-TeO2 Glasses

Authors(2) :-Kalsani Venkateshwarlu, Bachchewal Sreenivas

Electron paramagnetic resonance (EPR) and optical absorption studies of xMgO- (25-x) Li2O-55B2O3-20TeO2 glasses were made by introducing Cu2+ as a spin probe. The EPR spectra of all the glass samples recorded at X-band frequencies have similar spectral features. The Cu2+ ions are in well-defined axial sites, but subjected to small distortion leading to the broadening of the spectra. The spin-Hamiltonian parameter values indicate that the ground state of Cu2+ is dx2- y2 and the site symmetry around Cu2+ ions is tetragonal distorted octahedral. The optical absorption spectra exhibited a broadband corresponding to the d-d transition bands of Cu2+ ion. By correlating EPR and optical data, the bond parameters were evaluated and the values show purely ionic nature for the in-plane σ bonding and in-plane π bonding. The out-of-plane π bonding is moderately covalent.

Kalsani Venkateshwarlu, Bachchewal Sreenivas
Electron Spin Resonance, spin-Hamiltonian, Glass, Optical Absorption.
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Publication Details
  Published in : Volume 2 | Issue 4 | July-August 2016
  Date of Publication : 2016-08-31
License:  This work is licensed under a Creative Commons Attribution 4.0 International License.
Page(s) : 305-308
Manuscript Number : IJSRST1737104
Publisher : Technoscience Academy
PRINT ISSN : 2395-6011
ONLINE ISSN : 2395-602X
Cite This Article :
Kalsani Venkateshwarlu, Bachchewal Sreenivas, "EPR and Optical Absorption Studies of Cu2+ Doped MgO-Li2O-B2O3-TeO2 Glasses", International Journal of Scientific Research in Science and Technology(IJSRST), Print ISSN : 2395-6011, Online ISSN : 2395-602X, Volume 2, Issue 4, pp.305-308, July-August-2016
URL : http://ijsrst.com/IJSRST1737104