1. Faculty of Engineering and Applied Sciences, Department of Physics Riphah International University Islamabad Pakistan
2. Department of Physics University of Management and Technology Lahore Pakistan
3. Departmenet of Physics King Khalid University Abha Saudi Arabia
4. Laboratoire de Physique de la Matière Condensée, Département de Physique, Faculté des Sciences de Tunis Université Tunis El Manar Tunis Tunisia