MAGNETIC ORDER AND ANISOTROPY IN FERRIMAGNETIC CHAINS OF Mn(II) IONS AND NITRONYL-NITROXIDE RADICALS A. Ganeschi, D. Gatteschi, J. P. Renard, P. Rey and R. Sessoli J. Phys. Colloques, 49 C8 (1988) C8-859-C8-860 DOI: 10.1051/jphyscol:19888388