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    PERPENDICULAR MAGNETIC RECORDING MEDIUM WITH MULTILAYER RECORDING STRUCTURE INCLUDING INTERGRANULAR EXCHANGE ENHANCEMENT LAYER
    2.
    发明申请
    PERPENDICULAR MAGNETIC RECORDING MEDIUM WITH MULTILAYER RECORDING STRUCTURE INCLUDING INTERGRANULAR EXCHANGE ENHANCEMENT LAYER 审中-公开
    具有多层记录结构的特殊磁记录介质，包括交互式增强层

    公开(公告)号：US20080138662A1

    公开(公告)日：2008-06-12

    申请号：US11567908

    申请日：2006-12-07

    申请人： Andreas Klaus Berger ,  Qing Dai ,  Hoa Van Do ,  Yoshihiro Ikeda ,  David Thomas Margulies ,  Natacha F. Supper ,  Kentaro Takano ,  Min Xiao

    发明人： Andreas Klaus Berger ,  Qing Dai ,  Hoa Van Do ,  Yoshihiro Ikeda ,  David Thomas Margulies ,  Natacha F. Supper ,  Kentaro Takano ,  Min Xiao

    IPC分类号： G11B5/706

    CPC分类号： G11B5/66 ,  G11B5/65

    摘要： A perpendicular magnetic recording medium has a multilayer recording layer (RL) structure that includes a ferromagnetic intergranular exchange enhancement layer for mediating intergranular exchange coupling in the other ferromagnetic layers in the RL structure. The RL structure may be a multilayer of a first ferromagnetic layer (MAG1) of granular polycrystalline Co alloy with Ta-oxide, a second ferromagnetic layer (MAG2) of granular polycrystalline Co alloy with Si-oxide, and an oxide-free CoCr capping layer on top of and in contact with MAG2 for mediating intergranular exchange coupling in MAG1 and MAG2. The RL structure may also be a multilayer of an intergranular exchange enhancement interlayer (IL) in between two ferromagnetic layers, MAG1 and MAG2, each with reduced or no intergranular exchange coupling. Because the IL is in direct contact with both MAG1 and MAG2, it directly mediates intergranular exchange coupling in each of MAG1 and MAG2.

    摘要翻译： 垂直磁记录介质具有多层记录层（RL）结构，其包括用于介导RL结构中的其它铁磁层中的晶间交换耦合的铁磁晶间交换增强层。 RL结构可以是具有Ta氧化物的粒状多晶Co合金的第一铁磁层（MAG1），具有Si氧化物的粒状多晶Co合金的第二铁磁层（MAG 2）和不含无氧化物的CoCr的多层 在MAG1和MAG2之间介导晶间交换耦合的MAG 2顶部并与MAG 2接触的封盖层.RR结构还可以是两个铁磁层之间的晶间交换增强中间层（IL）的多层，MAG 1和MAG 2，每个都有减少或没有晶间交换耦合。 因为IL与MAG 1和MAG 2直接接触，所以它直接介导MAG1和MAG2中的每一个中的晶间交换耦合。

    Perpendicular magnetic recording disk with improved recording layer having high oxygen content
    4.
    发明授权
    Perpendicular magnetic recording disk with improved recording layer having high oxygen content 有权
    垂直磁记录盘，具有改善的氧含量高的记录层

    公开(公告)号：US07482071B2

    公开(公告)日：2009-01-27

    申请号：US11135750

    申请日：2005-05-24

    申请人： Hoa Van Do ,  Bernd Heinz ,  Yoshihiro Ikeda ,  Kentaro Takano ,  Min Xiao

    发明人： Hoa Van Do ,  Bernd Heinz ,  Yoshihiro Ikeda ,  Kentaro Takano ,  Min Xiao

    IPC分类号： G11B5/66

    CPC分类号： G11B5/65 ,  G11B5/656 ,  G11B5/66 ,  G11B5/667 ,  G11B5/732

    摘要： A perpendicular magnetic recording disk has an improved recording layer of a granular CoPtCr-based ferromagnetic alloy with inter-granular material made up of one or more oxides of Cr and one or more oxides of one or more of a segregant of Si, Ta, Ti, B, Nb or Hf, wherein the amount of oxygen present in the recording layer is greater than about 22 atomic percent and less than about 35 atomic percent. The amount of oxygen in the recording layer is substantially greater than the amount required for the stoichiometric oxide or oxides of the segregant or segregants, and a substantial portion of the oxygen present in the recording layer is present in the inter-granular material. The recording layer exhibits high signal-to-noise ratio (SNR), a coercivity Hc greater than about 5000 Oe and a nucleation field Hn greater (more negative) than about −1500 Oe.

    摘要翻译： 垂直磁记录盘具有改进的基于CoPtCr的铁磁性合金的记录层，其具有由一种或多种Cr的一种或多种氧化物和一种或多种Si，Ta，Ti分离的一种或多种氧化物构成的颗粒间材料 ，B，Nb或Hf，其中存在于记录层中的氧的量大于约22原子％且小于约35原子％。 记录层中的氧气量基本上大于分离器或分离器的化学计量氧化物或氧化物所需的量，并且记录层中存在的大部分氧气存在于颗粒间材料中。 记录层显示出高的信噪比（SNR），矫顽力Hc大于约5000Oe，成核场Hn大于（大于负））大于约-1500Oe。

    Perpendicular magnetic recording medium having an interlayer of a non-magnetic nickel alloy
    9.
    发明授权
    Perpendicular magnetic recording medium having an interlayer of a non-magnetic nickel alloy 有权
    具有非磁性镍合金中间层的垂直磁记录介质

    公开(公告)号：US07632580B2

    公开(公告)日：2009-12-15

    申请号：US11146348

    申请日：2005-06-06

    申请人： Yoshihiro Ikeda ,  Mary F. Minardi ,  Kentaro Takano ,  Qi-Fan Xiao

    发明人： Yoshihiro Ikeda ,  Mary F. Minardi ,  Kentaro Takano ,  Qi-Fan Xiao

    IPC分类号： G11B5/66

    CPC分类号： G11B5/667 ,  G11B5/7325

    摘要： Perpendicular magnetic recording media and methods of fabricating perpendicular magnetic recording media are described. The perpendicular magnetic recording medium of one embodiment includes an interlayer, an underlayer, and a perpendicular magnetic recording layer. The interlayer is comprised of a Ni-alloy having the characteristics of being nonmagnetic and having an FCC structure. The alloying element for the Ni-alloy may comprise one of V or Cr, or may comprise one of V, Cr, or W. The concentration of the alloying element is set such that the concentration of the alloying element is high enough to make the Ni-alloy non-magnetic, while low enough to maintain an FCC structure for the Ni-alloy.

    摘要翻译： 描述垂直磁记录介质和制造垂直磁记录介质的方法。 一个实施例的垂直磁记录介质包括中间层，底层和垂直磁记录层。 中间层由具有非磁性并具有FCC结构的特性的Ni合金构成。 用于Ni合金的合金元素可以包括V或Cr中的一种，或者可以包括V，Cr或W中的一种。合金元素的浓度被设定为使合金元素的浓度高到足以使 Ni合金非磁性，同时足够低以维持Ni合金的FCC结构。