1989 年 13 巻 S_1_PMRC_89 号 p. S1_33-42
It was already revealed by experiments and computer simulations that an ultra-high density signal over 20,000 FRPM (Flux Reversal Per Millimeter) can be recorded and reproduced by a single-pole head on a Co-Cr/Ni-Fe double-layer medium in perpendicular magnetic recording. In order to widely discuss the conditions which achieve such an ultra-high density recording in magnetic recording systems, computer simulations are carried out on each of magnetic recording, longitudinal, quasi-perpendicular and perpendicular. From the results, it has been shown that the combination of a single-pole head and a double-layer medium composed of a perpendicularly anisotropic recording layer and a soft magnetic underlayer is the most suitable for an ultra-high density recording.