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    Perpendicular magnetic recording medium with multiple exchange-coupled magnetic layers having substantially similar anisotropy fields
    4.
    发明申请
    Perpendicular magnetic recording medium with multiple exchange-coupled magnetic layers having substantially similar anisotropy fields 有权
    具有多个具有基本相似的各向异性场的交换耦合磁性层的垂直磁记录介质

    公开(公告)号：US20070212574A1

    公开(公告)日：2007-09-13

    申请号：US11372295

    申请日：2006-03-09

    申请人： Andreas Berger ,  Hoa Do ,  Eric Fullerton ,  Yoshihiro Ikeda ,  Byron Lengsfield ,  Natacha Supper

    发明人： Andreas Berger ,  Hoa Do ,  Eric Fullerton ,  Yoshihiro Ikeda ,  Byron Lengsfield ,  Natacha Supper

    IPC分类号： G11B5/66

    CPC分类号： G11B5/66

    摘要： A perpendicular magnetic recording medium has an “exchange-spring” type magnetic recording layer (RL) formed of two ferromagnetic layers with substantially similar anisotropy fields that are ferromagnetically exchange-coupled by a nonmagnetic or weakly ferromagnetic coupling layer. Because the write head produces a larger magnetic field and larger field gradient at the upper portion of the RL, while the field strength decreases further inside the RL, the upper ferromagnetic layer can have a high anisotropy field. The high field and field gradient near the top of the RL, where the upper ferromagnetic layer is located, reverses the magnetization of the upper ferromagnetic layer, which then assists in the magnetization reversal of the lower ferromagnetic layer. Because both ferromagnetic layers in this exchange-spring type RL have a high anisotropy field, the thermal stability of the medium is not compromised. The medium shows improved writability, i.e., a low switching field, as well as lower intrinsic media noise, over a medium with a conventional single-layer RL.

    摘要翻译： 垂直磁记录介质具有由具有基本相似的各向异性场的两个铁磁层形成的“交换弹簧”型磁记录层（RL），其通过非磁性或弱铁磁耦合层进行铁磁交换耦合。 由于写头在RL的上部产生较大的磁场和较大的场梯度，而在RL内的场强进一步降低，所以上铁磁层可以具有高的各向异性场。 在RL的顶部附近的高场磁场梯度，其中上铁磁层位于其上，反转上铁磁层的磁化，其随后有助于下铁磁层的磁化反转。 由于这种交换弹簧型RL中的两个铁磁层具有高各向异性场，所以介质的热稳定性不受影响。 在具有常规单层RL的介质上，介质显示改进的可写性，即低切换场，以及较低的固有介质噪声。

    "> Perpendicular magnetic recording system and medium with high-moment corrosion-resistant
    5.
    发明申请
    Perpendicular magnetic recording system and medium with high-moment corrosion-resistant "soft" underlayer (SUL) 有权
    垂直磁记录系统和高力矩耐腐蚀“软”底层（SUL）

    公开(公告)号：US20070087225A1

    公开(公告)日：2007-04-19

    申请号：US11251142

    申请日：2005-10-13

    申请人： Qing Dai ,  Bernd Heinz ,  Yoshihiro Ikeda ,  Mary Minardi ,  Kentaro Takano

    发明人： Qing Dai ,  Bernd Heinz ,  Yoshihiro Ikeda ,  Mary Minardi ,  Kentaro Takano

    IPC分类号： G11B5/66

    CPC分类号： G11B5/732 ,  G11B5/667

    摘要： A perpendicular magnetic recording disk has a soft magnetic underlayer (SUL) that has high corrosion resistance as well as high moment. The material of the SUL is an alloy comprising Co, Fe, X, and Y; where X is Ta or Nb, Y is Zr or Hf, and the combined amount of X and Y present in the alloy is between about 10 and 20 atomic percent. The atomic ratio of Co to Fe in the alloy is between about 90:10 to 10:90, preferably between about 25:75 and 35:65. The SUL may be a single-layer SUL or a multilayer SUL formed of multiple soft magnetic layers separated by an interlayer film or films.

    摘要翻译： 垂直磁记录盘具有高耐蚀性和高力矩的软磁性底层（SUL）。 SUL的材料是包括Co，Fe，X和Y的合金; 其中X是Ta或Nb，Y是Zr或Hf，合金中存在的X和Y的组合量在约10和20原子％之间。 合金中Co与Fe的原子比为约90:10至10:90，优选约25:75至35:65。 SUL可以是由层间膜或膜分离的多个软磁层形成的单层SUL或多层SUL。

    Perpendicular magnetic recording disk with improved recording layer having high oxygen content
    7.
    发明申请
    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：US20060269799A1

    公开(公告)日：2006-11-30

    申请号：US11135750

    申请日：2005-05-24

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

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

    IPC分类号： G11B5/65

    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。 记录层表现出高的信噪比（SNR），大于约5000Oe的矫顽力H c和大于（更负）的成核场H N n 约-1500 Oe。

    Perpendicular magnetic recording media with oxide-containing exchange coupling layer
    9.
    发明授权
    Perpendicular magnetic recording media with oxide-containing exchange coupling layer 有权
    具有氧化物交换耦合层的垂直磁记录介质

    公开(公告)号：US08168310B2

    公开(公告)日：2012-05-01

    申请号：US12638905

    申请日：2009-12-15

    申请人： Xiaoping Bian ,  Jack Jyh-Kau Chang ,  Qing Dai ,  Hoa V. Do ,  Yoshihiro Ikeda ,  Kentaro Takano ,  Chu S. Tran

    发明人： Xiaoping Bian ,  Jack Jyh-Kau Chang ,  Qing Dai ,  Hoa V. Do ,  Yoshihiro Ikeda ,  Kentaro Takano ,  Chu S. Tran

    IPC分类号： G11B5/66

    CPC分类号： G11B5/66 ,  G11B5/65

    摘要： A magnetic storage medium according to one embodiment includes a substrate; a first oxide magnetic layer formed above the substrate; a second oxide magnetic layer formed above the first oxide magnetic layer; an exchange coupling layer formed above the second oxide magnetic layer, the exchange coupling layer comprising an oxide; and a magnetic cap layer formed above the exchange coupling layer. A method according to one embodiment includes forming a high Ku first oxide magnetic layer above a substrate by sputtering; forming a low Ku second oxide magnetic layer above the first oxide magnetic layer by sputtering; forming an exchange coupling layer of CoCrPt-oxide above the second oxide magnetic layer; and forming a magnetic cap layer above the exchange coupling layer. Additional systems and methods are also presented.

    摘要翻译： 根据一个实施例的磁存储介质包括基板; 形成在所述基板上的第一氧化物磁性层; 形成在所述第一氧化物磁性层上方的第二氧化物磁性层; 在所述第二氧化物磁性层上形成的交换耦合层，所述交换耦合层包含氧化物; 以及形成在所述交换耦合层上方的磁性盖层。 根据一个实施例的方法包括通过溅射在衬底上方形成高Ku第一氧化物磁性层; 通过溅射在第一氧化物磁性层上方形成低Ku第二氧化物磁性层; 在所述第二氧化物磁性层上方形成CoCrPt氧化物的交换耦合层; 以及在所述交换耦合层上方形成磁性覆盖层。 还介绍了其他系统和方法。

    PERPENDICULAR MAGNETIC RECORDING MEDIA WITH OXIDE-CONTAINING EXCHANGE COUPLING LAYER
    10.
    发明申请
    PERPENDICULAR MAGNETIC RECORDING MEDIA WITH OXIDE-CONTAINING EXCHANGE COUPLING LAYER 有权
    含氧化物交换耦合层的全磁性记录介质

    公开(公告)号：US20110141621A1

    公开(公告)日：2011-06-16

    申请号：US12638905

    申请日：2009-12-15

    申请人： Xiaoping Bian ,  Jack Jyh-Kau Chang ,  Qing Dai ,  Hoa V. Do ,  Yoshihiro Ikeda ,  Kentaro Takano ,  Chu S. Tran

    发明人： Xiaoping Bian ,  Jack Jyh-Kau Chang ,  Qing Dai ,  Hoa V. Do ,  Yoshihiro Ikeda ,  Kentaro Takano ,  Chu S. Tran

    IPC分类号： G11B5/82 ,  C23C14/34

    CPC分类号： G11B5/66 ,  G11B5/65

    摘要： A magnetic storage medium according to one embodiment includes a substrate; a first oxide magnetic layer formed above the substrate; a second oxide magnetic layer formed above the first oxide magnetic layer; an exchange coupling layer formed above the second oxide magnetic layer, the exchange coupling layer comprising an oxide; and a magnetic cap layer formed above the exchange coupling layer. A method according to one embodiment includes forming a high Ku first oxide magnetic layer above a substrate by sputtering; forming a low Ku second oxide magnetic layer above the first oxide magnetic layer by sputtering; forming an exchange coupling layer of CoCrPt-oxide above the second oxide magnetic layer; and forming a magnetic cap layer above the exchange coupling layer. Additional systems and methods are also presented.

    摘要翻译： 根据一个实施例的磁存储介质包括基板; 形成在所述基板上的第一氧化物磁性层; 形成在所述第一氧化物磁性层上方的第二氧化物磁性层; 在所述第二氧化物磁性层上形成的交换耦合层，所述交换耦合层包含氧化物; 以及形成在所述交换耦合层上方的磁性盖层。 根据一个实施例的方法包括通过溅射在衬底上方形成高Ku第一氧化物磁性层; 通过溅射在第一氧化物磁性层上方形成低Ku第二氧化物磁性层; 在所述第二氧化物磁性层上方形成CoCrPt氧化物的交换耦合层; 以及在所述交换耦合层上方形成磁性覆盖层。 还介绍了其他系统和方法。