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2. 发明授权

US08679654B2 Magnetic recording medium including plural FePt alloy layers including carbon, oxides or nitrides 有权
标题翻译：磁记录介质包括包含碳，氧化物或氮化物的多个FePt合金层
公开(公告)号：US08679654B2
公开(公告)日：2014-03-25
申请号：US13372116
申请日：2012-02-13
申请人： Hiroaki Nemoto , Ikuko Takekuma , Kimio Nakamura , Junichi Sayama
发明人： Hiroaki Nemoto , Ikuko Takekuma , Kimio Nakamura , Junichi Sayama
IPC分类号： G11B5/66 , G11B5/65 , C22C38/00 , C22C5/04
CPC分类号： G11B5/653 , C22C5/04 , C22C38/002 , C22C2202/02 , G11B5/65 , G11B5/66
摘要： Surface flatness of magnetic recording medium to which a magnetic recording layer made of L10 FePt magnetic alloy thin film, with distance between a magnetic head and a magnetic recording medium sufficiently reduced. The magnetic recording layer includes: magnetic layers containing a magnetic alloy including Fe and Pt as principal materials; and one non-magnetic material selected from carbon, oxide and nitride. The first magnetic layer disposed closer to a substrate has a granular structure in which magnetic alloy grains including FePt alloy as the principal material are separated from grain boundaries including the non-magnetic material as the principal material. The second magnetic layer disposed closer to the surface than the first magnetic layer is fabricated so as to have a homogeneous structure in which an FePt alloy and the non-magnetic material are mixed in a state finer than diameters of the FePt magnetic alloy grains in the first magnetic layer.
摘要翻译：由L10FePt磁性合金薄膜制成的磁记录层，磁头和磁记录介质之间的距离充分降低的磁记录介质的表面平整度。磁记录层包括：含有以Fe和Pt为主要材料的磁性合金的磁性层; 和一种选自碳，氧化物和氮化物的非磁性材料。靠近基板设置的第一磁性层具有以包含FePt合金作为主要材料的磁性合金颗粒与包括非磁性材料在内的晶界作为主要材料的颗粒结构。制造比第一磁性层更靠近表面的第二磁性层，以具有均匀的结构，其中FePt合金和非磁性材料以比FePt磁性合金粒子的直径小的状态混合第一磁性层。

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