1. College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610068, China
2. School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, China
3. Department of Electrical and Computer Engineering, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan
4. Department of Applied Physics, The University of Tokyo, 7-3-1 Hongo, Tokyo 113-8656, Japan
5. Institute for Materials Research and Center for Science and Innovation in Spintronics, Tohoku University, Sendai 980-8577, Japan
6. School of Physics, The University of New South Wales, Sydney 2052, Australia
7. National University of Science and Technology “MISiS,” Moscow 119049, Russia