1. School of Physics, Shoolini University, Solan, HP 173229, India
2. Departamento de Fisica, I3N, Universidade de Aveiro, Campus Universitario de Santiago, 3810-193 Aveiro, Portugal
3. Department of Physics, Amity Institute of Applied Sciences, Amity University Uttar Pradesh, G. B. Nagar, UP 201301, India
4. Ferroelectric Research Laboratory, Department of Physics, A N College, Patna 800013, India
5. Department of Ceramics and Glass Engineering and CICECO, University of Aveiro, 3810-193 Aveiro, Portugal