1. P. G. Department of Physics, Sardar Patel University, Vallabh Vidyanagar – 388120, Gujarat, India
2. Department of Applied & Interdisciplinary Sciences, IICISST, Sardar Patel University, Vallabh Vidyanagar – 388120, Gujarat, India
3. Department of Physics, Parul Institute of Applied Sciences, Parul University, Waghodia, Vadodara, Gujarat, 391760, India
4. Department of Physics, Shri A. N. Patel P. G. Institute of Science and Research, Anand – 388001, Gujarat, India