A micromagnetic model of dual-layer magnetic-recording thin films

The micromagnetic model, which is capable of simulating magnetic layers having different magnetic and geometric properties, is applied to the study of the magnetic properties of dual-layer media characterized by a three-dimensional isotropic distribution of anisotropy axes in both layers, using parameters typical of cobalt-alloy films. In the absence of exchange interactions between the layers, a correlation is found between squareness ratios, average magnetostatic energy densities, and structural dimensions of the media. An in-phase magnetization reversal of the layers occurs with increasing interlayer exchange coupling. A complex relationship is found between coercivity and media parameters.>