Abstract

Systems with slow relaxation of the magnetization like Single Chain Magnets (SCM), involves the interactions between magnetic centres through covalent bond, hydrogen bonds or pi-pi interactions. SCM with ionic interaction are not known up to date. In this work we present the structural and magnetic characterization of a family of three highly symmetric oxo centred FeIII complexes of formula, [Fe3O(CH3COO)6(CH3CONH2)3][MX4], where M = Fe, Ga and X = Cl, Br., which form an ionic chain arrangement through the c axis. Interestingly, the compounds form by the [FeCl4]- and [FeBr4]- present ac frequency dependency, while the system with the [GaCl4]- does not present this feature.