Department of Physics, University of Azad Jammu and Kashmir, Muzaffarabad 13100, Pakistan;
Department of Physics, University of Azad Jammu and Kashmir, Muzaffarabad 13100, Pakistan;
National Center of Physics, Quaid-i-Azam University Campus, Islamabad, Pakistan;
UNESCO-UNISA Africa Chair in Nanosciences/Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk Ridge, PO Box 392, Pretoria, South Africa;
Nanosciences African Network, iThemba LABS-National Research Foundation, 1 Old Faure Road, Somerset West 7129, P.O.Box 722, Somerset West, Western Cape Province, South Africa;
Department of Physics, University of Azad Jammu and Kashmir, Muzaffarabad 13100, Pakistan;
Department of Physics, University of Azad Jammu and Kashmir, Muzaffarabad 13100, Pakistan;
Department of Physics, University of Azad Jammu and Kashmir, Muzaffarabad 13100, Pakistan;
Department of Physics, University of Azad Jammu and Kashmir, Muzaffarabad 13100, Pakistan;
