1. Hebei Key Lab of Optic‐Electronic Information and Materials, College of Physics Science and TechnologyHebei UniversityBaoding 071002P.R. China
2. College of Science and TechnologyNorth China Electric Power UniversityBaoding, Hebei 071051P.R. China
3. State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityHebei 066004P.R. China
4. Department of Materials Science and EngineeringHubei UniversityWuhan 430062P.R. China
5. Department of PhysicsWuhan UniversityWuhan 430072P.R. China