Directional dependence of the demagnetizing energy in imperfect thin magnetic films

Abstract
The magnetostatic energy of imperfect films having a two‐dimensional square‐lattice structure with voids between square islands of magnetic material is calculated for arbitrary ratios of thickness and island size to the period of the lattice. These calculations are relevant to the understanding of the uniaxial anisotropy observed in many thin films used as magnetic‐storage media.