Invention Grant
US07955723B2 Magnetic recording medium substrate and perpendicular magnetic recording medium 有权
磁记录介质基板和垂直磁记录介质

Magnetic recording medium substrate and perpendicular magnetic recording medium
Abstract:
A perpendicular magnetic recording medium comprising a pair of soft magnetic layers that are laminated via a non-magnetic layer and antiparallel-coupled to each other and that are provided between a non-magnetic substrate and a magnetic recording layer, wherein spike noise and medium noise can be positively suppressed when information recording and reproduction are carried out at high recording surface density. At least one pair of soft magnetic layers are laid and formed via a non-magnetic layer on a substrate of a non-magnetic material so that magnetic characteristics obtained by integrating the pair of soft magnetic layers have a magnetic hysteresis to thereby prevent the formation of a magnetic domain wall.
Information query
Patent Agency Ranking
0/0