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US 2001/0033449 A1Published application
Magnetic recording medium
AssigneeKabushiki Kaisha Toshiba
InventorsTakashi Hikosaka, Futoshi Nakamura, Hideo Ogiwara, Soichi Oikawa
Life of this patent
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Abstract
By using a magnetic recording medium in which the value of Hk/4πMs calculated from the anisotropic magnetic field Hk and the saturation magnetization Ms falls within a range of more than 2 and less than 5, the resistance to the thermal decay can be improved and a magnetic recording can be achieved with a high recording resolution and a good medium S/N without increasing the head magnetic field.
Claims16
A magnetic recording medium comprising:
- a substrate;
- and
- a perpendicular magnetic layer formed on said substrate and having an anisotropic magnetic field Hk and a saturation magnetization Ms which satisfy the following relation:
- 2<Hk/4πMs<5.
1 more element
A magnetic recording/reproducing apparatus, compring:
- a magnetic recording medium;
- a drive mechanism configured to support and rotate said magnetic recording medium;
- and
- a magnetic head configured to record/reproduce information in and from the magnetic recording medium;
- wherein said magnetic recording medium has an anisotropic magnetic field Hk and a saturation magnetization Ms which satisfy the following relation:
- 2<Hk/4πMs<5.
3 more elements
Dependencies are inferred from the claim text.