Abstract
Owing to the epitaxial inducement of Au atom, Au interlayer was introduced to increase the perpendicular anisotropy and the coercivity in L10-FePt nanocomposite film. Micromagnetics can be used to reveal the relationship between microstructure and magnetic properties of materials, and give the information of the perpendicular anisotropy and coercivity. In this work, the effect of the Au interlayer on annealed [Fe (0.5 nm)/Pt (0.5 nm)/Au (d nm)]10 nanocomposite recording medium by a micromagnetic model was studied. The model contains three phases: hard magnetic phase, soft magnetic phase, and nonmagnetic phase. The calculated result shows that perpendicular orientation degree of the texture and proportion of a hard magnetic phase to the total phase in the annealed film are both enhanced by increasing Au interlayer thickness. This result can be conducive to the improvement of the perpendicular anisotropy and the coercivity of the FePt nanocomposite film in the experiments.
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