1. Sultan Moulay Slimane University,Research Laboratory Physics and Sciences for Engineers (LRPSI), Poly-disciplinary Faculty,Beni, Mellal,Morocco
2. Sultan Moulay Slimane University,Laboratory of Engineering in Chemistry And Physics of Matter (LICPM),Benimellal,Morocco,23000
3. Sultan Moulay Slimane University,LDD, Faculty of Sciences and Technics,BeniMellal,Morocco,23000
4. Ecole Normal Supérieure (ENS) LPHE-MS, Mohammed V University,Faculty of Sciences,Department of physics,Rabat,Morocco