. Cette, calculs ab-initio qui ont permis l'analyse [56] montrent qu'un accord peut être obtenu avec l'hypothèse du Mn dans la conguration d 4 . L'absorption entre 2,1 et 3,5 eV a mis en évidence un niveau de Fermi dans le gap

L. Sur, Te n'a pas mis en évidence la conguration 3d 4 à laquelle nous nous attendions, car la bande d'absorption, qui s'élargit mais reste visible dans (Ga,Mn)N et qui a été identiée dans les II-VI contenant du Cr en forte dilution

. Néanmoins, les propriétés magnétiques sont sensibles au dopage électrique : le spectre MCD est modié et le ferromagnétisme disparaît avec un dopage p qui, d'après les mesures d'optique, a un eet direct sur les bandes

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