1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
2. Chongqing Key Laboratory of Vanadium−Titanium Metallurgy and Advanced Materials, Chongqing University, Chongqing 400044, China
3. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
4. Institute for Structure and Function & Department of Physics, Chongqing University, Chongqing 400044, China