Slow magnetic relaxations in azide or formate bridged chains based on dicubane-like 3d-4f clusters

Abstract Dicubane-like 3d-4f subunits are linked by azide or formate giving a series of 1D chains. The linkers of azide or formate have little influence on the structure of the M 2 Ln 2 subunits. Magnetic study indicated that ferromagnetic interactions exist in the chains of those complexes. At low temperature all the involved cobalt complexes exhibit slow magnetic relaxation.