Abstract
In this study, we analyzed the structure for FePt grains whose c-axes are parallel to the film plane (in-plane grains) and the effect of the grains on magnetic properties. According to the analysis for granular films with a constant GBM volume of 30 vol% deposited at a high substrate temperature, the structure such as the lattice constant c, a and degree of order for in-plane grains was estimated to be the same as that of FePt grains whose c-axes are normal to the film plane (normal grains). In addition, it was found that perpendicular magnetic anisotropy was dependent on both the ratio of in-plane grains to the normal grains (R parallel) and the degree of order. Considering R parallel and the volume of GBM, magnetocrystalline anisotropy (K u grain) is estimated to be 3.43 × 107 (erg cm−3) for perfect ordering FePt grains.
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