HIGH-FIELD MAGNETIZATION STUDY OF THE ANTIFERROMAGNETIC CHAIN SYSTEMS IN [CH3)3NH]3Mn2X7 (X=Cl, Br) AT 4.2 K J.J. Smit, M. Mostafa et L.J. De Jongh J. Phys. Colloques, 39 C6 (1978) C6-725-C6-726 DOI: 10.1051/jphyscol:19786322