1. Department of Physics, Career Point University, Hamirpur, India
2. Department of Physics, Saroop Rani Government College, Amritsar, India; Multifunctional Materials Laboratory, Department of Physics, Guru Nanak Dev University, Amritsar, India
3. Department of Physics, Hindu College, Amritsar, India
4. Multifunctional Materials Laboratory, Department of Physics, Guru Nanak Dev University, Amritsar, India
5. Department of Physics, Sant Longowal Institute of Engineering and Technology, Longowal, India