1. School of Physics Dalian University of Technology Dalian 116023 P. R. China
2. Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams (Ministry of Education) School of Materials Science and Engineering Dalian University of Technology Dalian 116023 P. R. China
3. Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams (Dalian University of Technology) Ministry of Education Dalian 116024 China
4. Institute of Advanced Magnetic Materials College of Materials and Environmental Engineering Hangzhou Dianzi University Hangzhou 310012 China
5. Haihua College Liaoning Normal University Dalian 116400 China
6. Department of Physics Government College University Faisalabad Faisalabad 38000 Pakistan
7. GBA branch of Aerospace Information Research Institute Chinese Academy of Sciences Guangzhou 510700 China