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