Nanocrystalline barium ferrite thin films prepared by sol-gel method

Nanocrystalline barium ferrite magnetic thin films are prepared by sol-gel method and dip-coating process with different Fe/Ba ratios. The phase composition, morphology, magnetic properties and electromagnetic properties of nanocrystalline barium ferrite magnetic thin films are studied by X-ray diffractometer (XRD), vibrating sample magnetometer (VSM), field emission scanning electron microscope (FESEM) atomic force microscope (AFM) and four-state four-port reflectometry. The results show that the proper Fe/Ba ratio is 9 for the preparation of nanocrystalline barium ferrite magnetic thin films, at which the thin films is stacked with well-proportional spicular crystals with the mean diameter of about 60 nm and the ratio of length to diameter of 3-7. The specific saturation magnetization, the remanence magnetization and the coercivity of prepared Barium ferrite magnetic thin film are 47.74 Am²/kg, 28.74 Am²/kg and 318.76 kA/m, respectively.