The magnetic oxide thin films of composition Ni0.3Cu0.7CoxCrFeO4 (0.0x1) are synthesized by SILAR method and sintered. Structural properties like X-ray diffraction, cation distribution and Infrared spectra studied. Dielectric properties such as dielectric constant, and dielectric loss factor are studied. Magnetic properties were studied with MOKE. It is observed that the thin films are spinal structured. The lattice constant increases with increase of Co.