Charge states of transition metal in "Cr, Co and Ni" doped Ln0.5Ca0.5MnO3 CMR manganites O. Toulemonde, F. Studer, A. Barnabé, A. Maignan, C. Martin and B. Raveau Eur. Phys. J. B, 4 2 (1998) 159-167 Published online: 15 July 1998 DOI: 10.1007/s100510050364