1. Department of Physics, Maharshi Dayanand University, Rohtak 124001, India
2. Department of Physics, Ch. Ranbir Singh University, Jind 126102, India
3. Department of Physics, Ch. Bansi Lal University, Bhiwani 127021, India
4. CSIR-Central Electrochemical Research Institute (CECRI) Chennai Unit, CSIR Madras Complex, Taramani, Chennai 600113, India