1. College of Physics
2. Qingdao University
3. Qingdao 266071
4. China
5. College of Electronic and Information Engineering
6. Electronic Ceramics Center
7. DongEui University
8. Busan 614-714
9. Korea
10. Department of Materials Science/CENIMAT-I3N
11. Faculty of Sciences and Technology
12. New University of Lisbon and CEMOP-UNINOVA
13. Campus de Caparica
14. 2829-516 Caparica