1. College of Physics Superconductivity and New Energy R&D Center (SNERDC) Southwest Jiaotong University Chengdu Sichuan 610031 China
2. Key Laboratory of Magnetic Levitation Technologies and Maglev Trains (Ministry of Education) Southwest Jiaotong University Chengdu Sichuan 610031 China
3. National Engineering Laboratory for Superconducting Materials (NELSM) Western Superconducting Technologies (WST) Co., Ltd Xi'an 710018 China
4. College of Physics and Energy Fujian Normal University Fuzhou Fujian 350117 China
5. Department of Superconductivity and New Energy R&D Center Southwest Jiaotong University Chengdu Sichuan 610031 P. R. China