1. Department of Physics, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
2. National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan, Republic of China
3. Center for Innovative Integrated Electronic Systems, Tohoku University, Sendai 980-0845, Japan
4. Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Sendai 980-8577, Japan
5. Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, Sendai 980-8577, Japan
6. Inorganic Chemistry and Catalysis, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
7. Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
8. Center for Quantum Technology, and Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan, Republic of China
9. Condensed Matter Physics Group, National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan, Republic of China
10. Institute of Scientific and Industrial Research, Osaka University, Osaka 567-0047, Japan
11. Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto 606-8501, Japan
12. UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore-452001, India
13. Center for Spintronics Research Network, Tohoku University, Sendai 980-8577, Japan
14. Center for Science and Innovative in Spintronics, Tohoku University, Sendai 980-8577, Japan