Study of the substitution effect of Mn doped in ZnO matrix O. Karzazi, A. Chahboun, A. G. Rolo, E. K. Hlil, N. Benzakour, K. Bouslykhane, A. Hourmatallah, S. Levichev, A. Khodorov and M. J.M. Gomes Eur. Phys. J. Appl. Phys., 50 3 (2010) 30801 Published online: 23 April 2010 DOI: 10.1051/epjap/2010056