1. A.E.T. Arts & Science College for Women, Attur, Tamil Nadu 636108, India
2. Department of Physics, Periyar University, Salem - 636 011, India
3. Research Center for Advanced Materials Science (RCAMS), King Khalid University, P. O. Box 9004 Abha 61413, Saudi Arabia
4. Department of Physics, King Khalid University, P. O. Box 9004, Abha 61413, Saudi Arabia
5. University Center for Research & Development (UCRD), Chandigarh University, NH95, Chandigarh-Ludhiana Highway, Gharuan, Mohali, Punjab 140413, India