1. Fert Beijing Institute, BDBC, School of Microelectronics, Beihang University, Xueyuan Road 37, Beijing 100191, China
2. National Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, People's Republic of China
3. State Key Laboratory of Electronic Thin Films and Integrated Devices, UESTC, Chengdu 610054, People's Republic of China
4. Key Laboratory of Multi-Spectral Absorbing Materials and Structures of Ministry of Education, UESTC, Chengdu 610054, People's Republic of China