1. National Key Laboratory of Science and Technology on Advanced Composites in Special Environmentsand Center for Composite Materials and StructuresHarbin Institute of Technology Harbin 150080 P. R. China
2. School of PhysicsUniversity of Electronic Science and Technology of China Chengdu Sichuan 611731 P. R. China
3. Department of Electrical EngineeringSukkur IBA University Sukkur 65200 Pakistan