- 专利标题: Perpendicular magnetic recording medium
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申请号: US14560708申请日: 2014-12-04
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公开(公告)号: US09672855B2公开(公告)日: 2017-06-06
- 发明人: Hiroyasu Kataoka , Hiroto Kikuchi , Akira Furuta , Shinji Uchida , Takehito Shimatsu
- 申请人: FUJI ELECTRIC CO., LTD.
- 申请人地址: JP Kawasaki-Shi
- 专利权人: FUJI ELECTRIC CO., LTD.
- 当前专利权人: FUJI ELECTRIC CO., LTD.
- 当前专利权人地址: JP Kawasaki-Shi
- 代理机构: Rabin & Berdo, P.C.
- 优先权: JP2012-267588 20121206
- 主分类号: G11B5/66
- IPC分类号: G11B5/66 ; G11B5/65
摘要:
A perpendicular magnetic recording medium includes at least a nonmagnetic substrate and a magnetic recording layer. The magnetic recording layer is constituted by a plurality of layers that includes at least a first magnetic recording layer and a second magnetic recording layer. The first magnetic recording layer has a granular structure that includes first magnetic crystal grains and first nonmagnetic crystal grain boundaries surrounding the first magnetic crystal grains. The first magnetic crystal grains include an ordered alloy, and the first nonmagnetic crystal grain boundaries are constituted by carbon. The second magnetic recording layer has a granular structure that includes second magnetic crystal grains and a second nonmagnetic crystal grain boundaries that surround the second magnetic crystal grains. The second magnetic crystal grains include an ordered alloy, and the second nonmagnetic crystal grain boundaries are constituted by a carbon-containing nonmagnetic material.
公开/授权文献
- US20150132608A1 PERPENDICULAR MAGNETIC RECORDING MEDIUM 公开/授权日:2015-05-14
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