1. School of Physics, University of Hyderabad, Hyderabad, India
2. School of Ceramic Engineering, Suranaree University of Technology, Nakhon Ratchasima, Thailand
3. Department of Physics, Indian Institute of Technology Delhi, New Delhi, India
4. Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi, India
5. Centre for Advanced Studies in Electronics Science and Technology (CASEST), School of Physics, University of Hyderabad, Hyderabad, India