Recording characteristics of perpendicular magnetic hard disk measured by nonflying single-pole head

A contact recording experiment using perpendicular magnetic hard disks was conducted with a nonflying single-pole-type magnetic head to investigate the practical feasibility of extremely high-density magnetic recording. A single-pole head produces an ideally sharp field distribution because of a strong head-medium magnetic interaction; hence, an isolated magnetization transition in perpendicular magnetic recording becomes much sharper than that in longitudinal recording at a narrower head-medium spacing. A much better durability of hard disks and heads due to a much smoother surface of the disk was also confirmed