[1] Jamia Millia Islamia, Dept Phys, Adv Elect & Nanomat Lab, New Delhi 110025, India
[2] King Khalid Univ, Dept Phys, Coll Sci, AFMOL, POB 9004, Abha 61413, Saudi Arabia
[3] Ulsan Natl Inst Sci & Technol, Dept Mat Sci, Ulsan 44919, South Korea
[4] Univ Aveiro, Dept Mat & Ceram Engn, P-3810193 Aveiro, Portugal