A FURTHER EXAMPLE OF SLOW RELAXATION IN HIGH-SPIN IRON (II) COMPOUNDS : Fe(papt)2 . C6H6 R. ZIMMERMANN, G. RITTER, H. SPIERING et D.L. NAGY J. Phys. Colloques, 35 C6 (1974) C6-439-C6-442 DOI: 10.1051/jphyscol:1974689