1. Multifunctional Materials Laboratory, Department of Physics, Guru Nanak Dev University, Amritsar, India
2. Department of Physics, Sant Longowal Institute of Engineering and Technology, Longowal, India
3. Department of Physics, Baba Farid College (Affiliated to Punjabi University, Patiala), Bathinda, India
4. Department of Chemistry, Guru Nanak Dev University, Amritsar, India
5. UGC-DAE Consortium for Scientific Research, R-5 Shed, BARC, Mumbai, India