Computer Simulation of granular perpendicular recording media with dispersions of grain size and grain separation

The possibility of 300-500 Gbit/in/sup 2/ perpendicular recording using granular recording media with dispersions of grain size and separation has been investigated through micromagnetic simulation based on grain separated Voronoi lattice. It was found that sufficient values of signal to noise ratio and good thermal stability are obtained for optimal medium parameters. The results were basically similar to those for uniform grain size and separation. The medium noise does not change significantly when the dispersions are introduced. The design concept and obtaining calculation process of optimal large-grain-separation medium previously reported remain valid.