| 摘要 |
In a perpendicular magnetic recording head having a main magnetic pole layer and a return yoke layer which are laminated with a magnetic gap layer interposed therebetween on a medium-opposing surface, a pair of side coils constituting respective electrically closed circuits on a surface parallel to the medium-opposing surface are provided on both sides in a track width direction of a magnetic pole part of the main magnetic pole layer. When a leakage magnetic field spreading from the magnetic pole part of the main magnetic pole layer passes through the pair of side coils, the pair of side coils generate a demagnetizing field in such a direction as to cancel a magnetic flux change thereof, thereby preventing the leakage magnetic flux from spreading. |
