1. Department of Physical Sciences, Natubhai V. Patel College of Pure and Applied Sciences, Vallabh Vidyanagar, Anand 388120, Gujarat, India
2. Department of Physics, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara 390002, Gujarat, India
3. UGC DAE Consortium for Scientific Research, Khandwa Road, Indore 452017, Madhya Pradesh, India