1. Department of Physics, Faculty of Science, King Khalid University, P. O. Box 9004, Abha 61413, Saudi Arabia
2. Research Center for Advanced Materials Science RCAMS, King Khalid University, P. O. Box 9004, Abha 61413, Saudi Arabia
3. Laboratory of Materials Physics and Its Applications, University of M’sila, 28000 M’sila, Algeria
4. National Centre for Nanotechnology, King Abdulaziz City for Science and Technology (KACST), P. O. Box 6086, Riyadh 11442, Saudi Arabia