1. Univ. Limoges, CNRS, IRCER, UMR 7315, F-87000 Limoges, France
2. Field of Advanced Ceramics, Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan
3. Ioffe Institute, Polytekhnicheskaya 26, 194021 St. Petersburg, Russia
4. Faculty of Physics, St. Petersburg State University, Petrodvoretz, 194508 St. Petersburg, Russia
5. Institut XLIM, UMR 7252 CNRS - Université de Limoges, 123, Avenue Albert Thomas, 87060 Limoges Cedex, France
6. Institut des Sciences Moleculaires - CNRS UMR 5255, Université de Bordeaux, 33405 Talence, France