发明授权
- 专利标题: Magnetic medium with an orientation control layer
- 专利标题(中): 具有取向控制层的磁性介质
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申请号: US14114641申请日: 2012-05-14
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公开(公告)号: US09245563B2公开(公告)日: 2016-01-26
- 发明人: Atsushi Hashimoto
- 申请人: Atsushi Hashimoto
- 申请人地址: JP Tokyo
- 专利权人: SHOWA DENKO K.K.
- 当前专利权人: SHOWA DENKO K.K.
- 当前专利权人地址: JP Tokyo
- 代理机构: Sughrue Mion, PLLC
- 优先权: JP2011-110354 20110517
- 国际申请: PCT/JP2012/062277 WO 20120514
- 国际公布: WO2012/157600 WO 20121122
- 主分类号: G11B5/74
- IPC分类号: G11B5/74 ; G11B23/00 ; G11B5/667 ; G11B5/73
摘要:
Provided is a magnetic recording medium which maintains high vertical orientation of a vertical magnetic layer, and which is capable of realizing high recording densification. In the magnetic recording medium, at least a soft magnetic underlying layer (30), seed layers (31, 32), an orientation control layer (33), and a vertical magnetic layer are laminated in this order on the non-magnetic substrate. The soft magnetic underlying layer (30) has an amorphous or microcrystalline structure. The seed layers (31, 32) include a first seed layer (31) formed from a metal oxide or a metal nitride, and a second seed layer (32) which is formed on the first seed layer and is formed from a metal formed with an island-shape or a net shape. In the orientation control layer (33) and the vertical magnetic layer, respective crystal grains constitute columnar crystals that are continuous in a thickness direction based on the second seed layer (32).
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