1. Department of Physics, Women University of AJ&K, Bagh 12500, Pakistan
2. Department of Physics, Quaid-i-Azam University, Islamabad 45320, Pakistan
3. Department of Physics, University of AJ&K, Muzafarabad 13100, Pakistan
4. CONACYT, Corporación Mexicana de Investigación en Materiales, Saltillo, Coahuila 25290, México
5. Universidad Autónoma de Coahuila, Facultad de Ciencias Químicas, Saltillo, Coahuila 25280, México