1. Department of Physics, Government College for Women, Jind 126 102, India
2. Department of Physics, SUS Government College, Matak Majri, Indri, Karnal 132 041, India
3. Department of Physics, Chaudhary Devi Lal University, Sirsa 125 055, India
4. Department of Physics, Kurukshetra University, Kurukshetra 136 119, India