1. Department of Physics, University of Barishal, Barishal 8200, Bangladesh
2. Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
3. Department of Electrical and Electronic Engineering, Bangamata Sheikh Fojilatunnesa Mujib Science & Technology University, Jamalpur 2012, Bangladesh
4. Department of Materials Science and Engineering, Khulna University of Engineering & Technology, Khulna 9203, Bangladesh