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Spectroscopic studies of Cu2+ ion doped in CaO-SrO-Na2O-B2O3 glasses

J. LAKSHMI KUMARI1,2, V. NAGA PADMINI1, J. SANTHAN KUMAR1, SANDHYA COLE1,*

Affiliation

  1. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur- 522 510, India
  2. Department of Physics, Y.A. Govt. Degree College for Women, Chirala- 523 155, India

Abstract

Glasses of the (20-x)CaO-xSrO-(20-y)Na2O-60B2O3-y (CSNB) system with (5  x  15) mol% and y=0.1mol% of CuO were characterized by X-ray diffraction (XRD), EPR (Electron Paramagnetic Resonance), Optical absorption Spectra and FT-IR Studies. The EPR results indicate that the transition metal ions are present in octahedral site with tetragonal distortion. Spin-Hamiltonian parameters were evaluated. The Optical band energy (Eopt) and Urbach energy (E) were calculated from their ultra violet edges. By correlating EPR and Optical data the molecular orbital coefficients have been evaluated. The IR studies shows that the glassy system contains BO3 and BO4 units in the disordered manner..

Keywords

EPR, Optical absorption spectra, Borate glasses, Cu2+ions, FT-IR.

Citation

J. LAKSHMI KUMARI, V. NAGA PADMINI, J. SANTHAN KUMAR, SANDHYA COLE, Spectroscopic studies of Cu2+ ion doped in CaO-SrO-Na2O-B2O3 glasses, Optoelectronics and Advanced Materials - Rapid Communications, 6, 9-10, September-October 2012, pp.807-813 (2012).

Submitted at: March 16, 2012

Accepted at: Sept. 20, 2012