Preparation of Fe3O4 Films by Light-Enhanced Ferrite Planing

Polycrystalline Fe
₃
O
₄
films were plated on glass substrates in an aqueous solution. By irradiating the substrate surface with an Xe lamp at power density of ~450 W/cm
²
, the deposition rate of Fe
₃
O
₄
film was increased by a factor of about 10 (from ~30 nm/min to ~320 nm/min). With light irradiation times as short as 4 min, we obtained ferrite films of ~2 μm thickness. We believe that the light accelerates the reaction by raising the temperature. X-ray analysis revealed that the films were polycrystalline with a spinel structure, with no preferred orientation, and no scattering due to impurity phases was observed.