1. College of Physical Science and Technology, Bohai University, Jinzhou 121013, P. R. China
2. Beijing Advanced Innovation Center for Materials Genome Engineering, Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, P. R. China
3. Department of Physics, University of Science and Technology Beijing, Beijing 100083, P. R. China
4. College of Miami, Henan University, Kaifeng 475004, P. R. China