Perpendicular magnetic recording and reproducing head
AssigneeHitachi Global Storage Technologies Japan, Ltd.
InventorsHisashi Kimura, Kazuhiro Nakamoto, Yoshiaki Kawato, Nobuo Yoshida
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Abstract
There is provided a perpendicular magnetic recording and reproducing system in which the overwrite erase ratio of a perpendicular magnetic head has been improved to prevent the deterioration of an overwrite property. In the perpendicular magnetic head, a third magnetic pole composed of a soft magnetic layer is formed on the leading side of a recording magnetic pole via a non-magnetic layer, thereby reducing magnetic interference from magnetization on a medium with the recording magnetic pole and preventing the deterioration of the overwrite property.
Claims2
A perpendicular recording and reproducing magnetic head comprising:
- a read element having a pair of magnetic shields composed of upper and lower shield, and a magneto-resistive effect film disposed between the pair of magnetic shields;
- a write element having a main magnetic pole, an auxiliary magnetic pole magnetically coupled to the main magnetic pole and provided on a trailing side of the main magnetic pole, and a soft magnetic layer separated from the main magnetic pole by non-magnetic layer provided on a leading side of the main magnetic pole;
- and
- a coil for exciting the main magnetic pole,
- wherein a width of the soft magnetic layer is larger than a width of the main magnetic pole.
Dependencies are inferred from the claim text.