Abstract
Present paper deals with investigation of magnetic properties of electrochemically prepared crystalline films of Prussian blue analogues (PBAs) based molecular magnet, KjFek[Cr(CN)6]l⋅mH2O with varying film stoichiometry. Film stoichiometry has been varied by depositing films at −0.5, −0.6 and −0.8 V at room temperature. It has been observed that the alkali metal ions are introduced into the films just by using suitable electrode voltage, contrary to usual method where alkali metal ions are intentionally introduced into the lattice by using additional compounds of alkali metals as starting materials. Magnetization data show ferromagnetic (parallel spin ordering) nature of all deposited film with the Curie temperature (TC)∼11 K for Fe1.5[Cr(CN)6]⋅7.5H2O film. Changes in the magnetic properties such as TC, coercivity and saturation magnetization have also been observed with variation in film stoichiometry. The observed changes are mainly attributed to the inclusion of potassium ion, which alters FeII/CrIII ratio, thus magnetic properties.
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