Magnetic properties of c-axis oriented Sr0.8La0.2Fe11.8Co0.2O19 ferrite film prepared by chemical solution deposition

A Sr0.8La0.2Fe11.8Co0.2O19 ferrite film has been prepared on a (0 0 1) sapphire substrate by chemical solution deposition. Structural characteristics indicate that the film is c-axis oriented and single-phase with space group P63/mmc. The grains are regular columnar with diameter between 50 and 100 nm as determined by atomic force microscopy. The sample possesses high saturation magnetization (130 emu/cm3), high coercivity (6.9 kOe), and large squareness ratio (0.9) at room temperature, which makes it a promising recording material.