1. Department of Physics, Maharshi Dayanand University, Rohtak 124001, India
2. Department of Applied Physics, Guru Jambheshwar University of Science and Technology, Hisar 125001, India
3. Department of Physics, Indira Gandhi University, Meerpur, Rewari 123401, India
4. Department of Physics, Central University of Haryana, Mahendergarh 123029, India