1. Department of Physics, COMSATS Institute of Information Technology, Lahore 54000, Pakistan
2. Department of Physics, University of Okara, Okara 56300, Pakistan
3. CAS Key Laboratory
of Magnetic Materials and Devices, Zhejiang Province Key Laboratory
of Magnetic Materials and Application Technology, Ningbo Institute
of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
4. Department of Energy
Technology, Royal Institute of Technology (KTH), Stockholm 10044, Sweden