1. Laboratory of Physical Chemistry of Materials
2. Faculty of Sciences of Monastir
3. University of Monastir
4. 5019 Monastir
5. Tunisia
6. UEMA/CCT
7. Universidade Federal de Campina Grande – UFCG
8. Campina Grande
9. Brazil
10. Institut Néel
11. CNRS
12. Université J. Fourier
13. 38042 Grenoble
14. France