发明名称 |
Magnetic recording medium containing first and second recording layers, each layer containing a columnar structure |
摘要 |
Embodiments of the invention provide a perpendicular magnetic recording medium capable of reconciling a high recording density with high thermal stability, and having a high write-ability while maintaining high magnetic anisotropy energy. In one embodiment, a perpendicular magnetic recording medium has a soft-magnetic underlayer, and magnetic recording layers, and the magnetic recording layers comprises a first recording layer containing magnetic grains oriented in a direction normal to a medium plane, and a second recording layer containing magnetic grains tilted in a cross-track direction. There can be provided a perpendicular magnetic recording medium resistant to thermal fluctuation, small in medium noise, and excellent in write-ability.
|
申请公布号 |
US7556871(B2) |
申请公布日期 |
2009.07.07 |
申请号 |
US20050105045 |
申请日期 |
2005.04.12 |
申请人 |
HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V. |
发明人 |
ICHIHARA TAKAYUKI;NAKAMURA ATSUSHI;TAMAI ICHIRO;HOSOE YUZURU |
分类号 |
G11B5/66;G11B5/64;G11B5/65;G11B5/667;G11B5/73;G11B5/738;H01F10/16;H01F10/30 |
主分类号 |
G11B5/66 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|