Abstract
Superlattices with both large perpendicular magnetocrystalline anisotropy and Kerr rotations in the range of visible light are potential materials for high-density magneto-optic recording media. Transition metal superlattices formed from Co and Pt have been the focus of recent interest since they have both of these desirable properties. In this study, the intrinsic magnetocrystalline anisotropy of several Co/Pt superlattices is computed from ab initio local spin-density electronic structure calculations. In the case of nCo/5Pt [111], extrapolating the anisotropy to zero Co thickness yields an interface anisotropy of 0.90 ergs/cm2 in good agreement with previous estimates of 0.85 ergs/cm2 based upon the Neèl model.1 Results for the anisotropy versus Co thickness will be presented for several different growth directions and the results compared to experiment and analyzed in terms of the Neèl model.
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