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US 2009/0214897 A1Published application
Magnetic storage apparatus
AssigneeFujitsu Limited
InventorKenji Sato
Life of this patent
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Abstract
A magnetic storage apparatus is provided with a perpendicular magnetic recording medium having a soft magnetic underlayer and a recording layer, and a magnetic head having a medium opposing surface. The soft magnetic underlayer has axes of easy magnetization oriented along a circumferential direction. A return yoke part of a recording element in the head includes return side yokes arranged in a radial direction of a main magnetic pole part on the medium opposing surface, whereby a magnetic flux of a recording magnetic field flows in the radial direction within the soft magnetic underlayer.
Claims14
A magnetic storage apparatus comprising:
- a perpendicular magnetic recording medium having a disk-shaped substrate, a soft magnetic underlayer disposed on the substrate, and a recording layer disposed above the soft magnetic underlayer and having axes of easy magnetization perpendicular to a film surface thereof;
- and
- a magnetic head having a medium opposing surface, and a recording element and a reproducing element which are exposed at the medium opposing surface,
- wherein the soft magnetic underlayer has axes of easy magnetization oriented along a circumferential direction,
- the recording element has a main magnetic pole part made of a soft magnetic material and applying a recording magnetic field, and a return yoke part made of a soft magnetic material and circulating the recording magnetic field, and
- the return yoke part includes return side yokes arranged in a radial direction of the main magnetic pole part on the medium opposing surface,
- whereby a magnetic flux of the recording magnetic field flows in the radial direction within the soft magnetic underlayer.
4 more elements
Dependencies are inferred from the claim text.