[1] State Key Laboratory of Powder Metallurgy, Central South University, Hunan, Changsha,410083, China
[2] Department of Mathematics and Physics / CREST Center, North Carolina Central University, Durham,NC,27707, United States
[3] Physics Department, Federal University of São Carlos, SP, São Carlos,13565-905, Brazil
[4] Department of Physics, University of Azad Jammu and Kashmir, Azad Kashmir, Muzaffarabad,13100, Pakistan
[5] Department of Physics, University of Peshawar, Peshawar,25120, Pakistan
[6] Department of Physics, Islamia College Peshawar, Peshawar,25120, Pakistan