CHEMISTRY AND PHYSICS OF MOLECULAR BASED FERROMAGNETS Y. Journaux, P. Van Koningsbruggen, F. Lloret, K. Nakatani, Y. Pei, O. Kahn et J. P. RenardJ. Phys. Colloques, 49 C8 (1988) C8-851-C8-852DOI: https://doi.org/10.1051/jphyscol:19888384