Magnetic properties of La–Co substituted barium ferrite thin films with large magnetic anisotropy

Abstract

Abstract Barium ferrite thin films with lanthanum ions and cobalt ions substituted for barium ions and iron ions have been prepared by conventional diode sputtering method. The hexagonal magnetoplumbite structure was formed by an annealing at 800°C or above. La–Co-substituted barium ferrite thin films had large magnetic anisotropy compared with non-substituted barium ferrite thin films. Moreover, an attempt was also made to reduce the film thickness of La–Co-substituted barium ferrite thin films, in order to utilize them as perpendicular magnetic recording media.