1. Laboratory of Physical Materials, Microelectronics, Automatics and Heat Transfer (LPMMAT), Faculty of Sciences, Hassan II University of Casablanca-Morocco, Casablanca 20600, Morocco e-mail:
2. Laboratory of Physical Materials, Microelectronics, Automatics and Heat Transfer (LPMMAT), Faculty of Sciences, Hassan II University of Casablanca-Morocco, Casablanca 20600, Morocco e-mails: ;