Computer simulation of high-density multiple transitions in magnetic disc recording

Self-consistent computations of a number of high-density transitions are carried out on the basis of an improved magnetization curve model describing stable and reversible magnetization changes even on minor loops. Readback voltages and peak-shifts computed on plated metallic thin films show considerable differences from those calculated by the superposition method. This indicates that evaluation of high-density recording performance should be done by self-consistent computations. Results obtained also suggest that a recording density as high as 10,000 flux reversals per cm is attainable using metallic thin films of high coercive force (e.g. 700 Oe).