1. Laboratory for
High Performance Ceramics, Empa. Swiss Federal Laboratories for Materials
Science and Technology, CH-8600 Dübendorf, Switzerland
2. Department
of Physics, ETH Zürich, Swiss Federal Institute of Technology CH-8057 Zürich, Switzerland
3. Sandia National
Laboratories, Livermore, California 94551, United States
4. Advanced
Light
Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
5. Physics
Department, Nigde University, 51240 Nigde, Nigde, Turkey
6. Department
of Physics and Photon Science, School of Physics and Chemistry, Ertl
Center for Electrochemistry and Catalysis, Gwangju Institute of Science and Technology, Gwangju, Chonnam 500-712, Republic of Korea
7. Department
of Materials Engineering, University of Tokyo, 113-8656 Tokyo, Japan