1. Ceramics Laboratory, EPFL-Swiss Federal Institute of Technology, Lausanne 1015, Switzerland
2. Peter Grünberg Institute and Ernst Ruska-Center for Microscopy
and Spectroscopy with Electrons, Forschungszentrum Jülich, 52425 Jülich, Germany
3. Institute for Photon Science and Synchrotron Radiation, KIT - Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
4. Central Facility for Electron Microscopy
(GFE), RWTH Aachen University, Aachen 52074, Germany
5. The School of Electronic and Information
Engineering, Xi’an Jiaotong University, Xi’an 710049, China
6. Department of Materials Science and Engineering, Tel-Aviv University, Ramat Aviv 69978, Israel