1. a Department of Physics, Faculty of Science , The M. S. University of Baroda , Vadodara, 390002, Gujarat, India
2. b Head, Material Science Department , National Institute of Technology , Hamirpur, 177005, Himachal Pradesh, India
3. c UGC-DAE Consortium for Scientific Research , Khandwa Road, Indore, 452017, Madhya Pradesh, India