Fabrication of metal-oxide ferromagnetic granular films by metal-oxide co-electrodeposition

Co-Ce-O films were synthesized by a newly developed electrochemical method called the "metal-oxide co-electrodeposition method," i.e., the simultaneous deposition of Co and CeO/sub 2/ from a reaction solution. containing COSO/sub 4/, CeCl/sub 3/, and glycine. Glycine acts as the complexing agent for Co/sup 2+/ and was effective in avoiding the precipitation of Co(OH)/sub 2/. The Co-Ce-O films prepared had a smooth surface. The Co content in the deposited films was subject to change from 0 to 100 vol.%, depending on the concentration of the CoSO/sub 4/ in the reaction solution. Coercivity and sheet resistivity decrease suddenly at 22 vol.% Co. Therefore, the nano-size structure of the films may be changed at this concentration.