| 摘要 |
PROBLEM TO BE SOLVED: To suppress magnetic domain walls in a soft magnetic backing layer against an external magnetic field which is larger than before. SOLUTION: At least the following layers are formed in this order on a non-magnetic substrate 1: an anti-ferromagnetic pinned layer 2, a soft magnetic backing underlayer 3, a non-magnetic metal layer 4, a soft magnetic backing upper layer 5, a non-magnetic underlayer 6, a magnetic recording layer 7, and a protective film 8. Further, a liquid lubricant layer 9 is formed on them. The soft magnetic backing underlayers 3, the non-magnetic metal layer 4, and the soft magnetic backing upper layer 5 are laminated together to form a soft magnetic backing layer 10. The magnetizing direction of the soft magnetic backing underlayer 3 and the soft magnetic backing upper layer 5 having the non-magnetic metal layer 4 in-between is parallel with the film surface, and these layers 3 and 5 are ferromagnetically coupled together with 180°angle differences between them. By introducing an artificial AFC in addition to the conventional anti-ferromagnetic pinned layer, magnetic domain wall formation can be suppressed in the soft magnetic lining layer against the external magnetic field larger than before. COPYRIGHT: (C)2004,JPO&NCIPI
|
