1. School of Materials Science and Engineering, Beijing Institute of Technology, Haidian, Beijing 100081, P. R. China
2. National Key Laboratory of Science and Technology on Materials under Shock and Impact, Beijing Institute of Technology, Haidian, Beijing 100081, P. R. China
3. Department of Electrical Engineering and Information Systems, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
4. Center for Spintronics Research Network (CSRN), Graduate School of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
5. Institute for Nano Quantum Information Electronics, The University of Tokyo, Meguro-ku, Tokyo 153-8505, Japan