NONLINEAR SUSCEPTIBILITY AROUND THE HELIMAGNETIC-TO-COLLINEAR MAGNETIC TRANSITION IN Cr5S6 S. Ohta, A. Kawamoto, S. Anzai et H. Sakamoto J. Phys. Colloques, 49 C8 (1988) C8-1559-C8-1560 DOI: 10.1051/jphyscol:19888714