Tuning perpendicular magnetic anisotropy and coercivity of L1-FePt nanocomposite film by interfacial manipulation

Abstract

Based on the interfacial anisotropy manipulation of multilayer structure and the orientation manipulation of surfactant Au atoms, Fe/Pt/Au multilayers were designed to achieve tunable perpendicular magnetic anisotropy (PMA) of L10-FePt nanocomposite films. In the mean time, the ordering degree of the Fe/Pt/Au multilayers was modified by adjusting the defect concentration in the film, which can be controlled by using different multilayer structures and by the diffusion of Au atoms. This makes the coercivity (HC) of L10-FePt nanocomposite films able to be tailored. Thus a L10-FePt nanocomposite film with high PMA and tunable HC was constructed that provides important experimental data for preparing writable FePt perpendicular magnetic recording media.