EPR and Spectral Studies of Cu2+ ion in (30-x)CdO- xAl2O3- 35 Bi2O3 - 34 B2O3 -1CuO Glasses

Volume 6 Issue 4 January - March 2019

Research Paper

EPR and Spectral Studies of Cu2+ ion in (30-x)CdO- xAl2O3- 35 Bi2O3 - 34 B2O3 -1CuO Glasses

A. V. Lalitha Phani*, Abdul Hameed**, Md. Shareefuddin ***, M. Narasimha Chary ****, G. Ramadevudu*****

* Associate Professor, Department of Physics, Sree Dattha College of Engineering, Hyderabad, Telangana, India.

** Assistant Professor, Department of Physics, Nizam College, Osmania University, Telangana, India.

*** Senior Assistant Professor, Department of Physics, Osmania University, Hyderabad, Telangana, India.

**** Professor (Rtd), Department of Physics, Osmania University, Hyderabad, Telangana, India.

***** Senior Assistant Professor, Department of Physics, Vasavi College of Engineering, Hyderabad, Telangana, India.

Phani, A.V.P., Hameed, A., Shareefuddin, Md., Chary, M.N., and Ramadevudu, G. (2019). EPR and Spectral Studies of Cu2+ ion in (30-x)CdO- xAl2O3- 35 Bi2O3- 34 B2 O3 -1CuO Glasses i-manager’s Journal on Material Science , 6(4), 67-74. https://doi.org/10.26634/jms.6.4.15706

Abstract

Electron Paramagnetic Resonance (EPR) and Optical absorption studies were investigated in CuO doped (30-x)CdO- xAl2O3 - 35 Bi2O3 - 34 B2O3 -1CuO  glasses (x=0, 5, 10, 15 mole %) were prepared by melt quenching technique. The amorphous nature of all the glass samples were confirmed by XRD technique. By using the EPR and Optical absorption measurements techniques the structural changes in the above glass system was estimated and it was confirmed that Cu2+  ions were present in tetragonally distorted octahedral sites elongated along z-axis with dx2-y2 orbital (2B1g) ground state in all of the glasses investigated. Bonding parameters had been evaluated by correlating EPR and optical absorption data. The molecular orbital band parameter values of (30-x)CdO- xAl2O3 - 35 Bi2O3 - 34 B2O3 -1CuO  glasses values indicated in plane σ-bonding (α2) is moderately ionic. The in plane π-bonding (β2) is ionic in nature and out of plane π-bonding (β'2) is shifting from moderately ionic to ionic as we move from CABBC1 to CABBC3. The FTIR spectra revealed information about the nature of bonds present in the glass matrix.