1. College of Materials Science and Engineering State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University Changsha Hunan 410082 China
2. Department of Physics Shanghai Polytechnic University Shanghai 201209 China
3. Advanced Institute for Materials Research Tohoku University Sendai 980–8577 Japan
4. College of Mechanical and Vehicle Engineering Hunan University Changsha Hunan 410082 China