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    Magnetic recording disk with antiferromagnetically coupled master layer including copper
    12.
    发明申请
    Magnetic recording disk with antiferromagnetically coupled master layer including copper 失效
    具有反铁磁耦合主磁层（包括铜）的磁记录盘

    公开(公告)号：US20060046102A1

    公开(公告)日：2006-03-02

    申请号：US10931642

    申请日：2004-08-31

    申请人： Xiaoping Bian ,  Mary Doerner ,  Tetsuya Kanbe ,  Mark Mercado ,  Mohammad Mirzamaani ,  Adam Polcyn ,  Kai Tang

    发明人： Xiaoping Bian ,  Mary Doerner ,  Tetsuya Kanbe ,  Mark Mercado ,  Mohammad Mirzamaani ,  Adam Polcyn ,  Kai Tang

    IPC分类号： G11B5/66

    CPC分类号： G11B5/732 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7325

    摘要： An antiferromagnetically coupled (AFC) magnetic recording medium with an AFC master layer comprising at least two magnetic layers with the top magnetic layer including copper is described. The slave layer is separated from the master layer structure by a nonmagnetic spacer layer selected to antiferromagnetically couple the layers. The master layer structure according to the invention includes a bottom and top layer of distinct ferromagnetic materials. Preferably, the top layer of the master layer is a cobalt alloy including from 1 to 5 at. % copper with an example being CoPt13Cr20B8Cu2. The AFC magnetic layer structure can be used with a variety of substrates including circumferentially textured glass and NiP/AlMg.

    摘要翻译： 描述了具有包括至少两个具有顶部磁性层包括铜的磁性层的AFC主层的反铁磁耦合（AFC）磁记录介质。 通过选择用于反铁磁耦合层的非磁性间隔层将从属层与主层结构分离。 根据本发明的主层结构包括不同铁磁材料的底层和顶层。 优选地，主层的顶层是包括1至5个的钴合金。 ％铜，例如CoPt 13 C 20 20 B 2 Cu 2。 AFC磁性层结构可以与各种基材一起使用，包括圆周纹理玻璃和NiP / AlMg。

    Magnetic recording medium and magnetic recording apparatus
    13.
    发明申请
    Magnetic recording medium and magnetic recording apparatus 审中-公开
    磁记录介质和磁记录装置

    公开(公告)号：US20050084716A1

    公开(公告)日：2005-04-21

    申请号：US10985045

    申请日：2004-11-10

    申请人： Tetsuya Kanbe ,  Hiroyuki Suzuki ,  Yotsuo Yahisa ,  Yoshiyuki Hirayama ,  Hidekazu Kashiwase

    发明人： Tetsuya Kanbe ,  Hiroyuki Suzuki ,  Yotsuo Yahisa ,  Yoshiyuki Hirayama ,  Hidekazu Kashiwase

    IPC分类号： C22C19/07 ,  G11B5/64 ,  G11B5/66 ,  G11B5/73 ,  G11B5/738 ,  H01F10/16 ,  H01F10/30 ,  G11B5/147

    CPC分类号： G11B5/7325 ,  G11B5/66 ,  Y10S428/90 ,  Y10T428/1121 ,  Y10T428/12465 ,  Y10T428/12854 ,  Y10T428/12861

    摘要： It is an object of the present invention to provide a high reliability magnetic storage apparatus capable of performing writing and reading back of high density information. The magnetic storage apparatus is so configured as to have a longitudinal magnetic recording medium including: a magnetic layer formed on a non-magnetic substrate via a plurality of underlayers; the magnetic layer including a lower magnetic layer containing Ru in an amount of not less than 3 at % to not more than 30 at %, and Cr in an amount of not less than 0 at % to not more than 18 at %, and further containing at least one of B or C in an amount of not less than 0 at % to not more than 20 at %, and an upper magnetic layer containing Co as a main component disposed thereon via a non-magnetic intermediate layer.

    摘要翻译： 本发明的目的是提供一种能够执行高密度信息的写入和读回的高可靠性磁存储装置。 磁存储装置被配置为具有纵向磁记录介质，其包括：通过多个底层在非磁性基板上形成的磁性层; 所述磁性层包括含有不小于3原子％至不超过30原子％的量的Ru的下磁性层，并且不少于0原子％至不大于18原子％的Cr， 含有不小于0at％至不超过20at％的B或C中的至少一个，以及经由非磁性中间层设置在其上的Co作为主要成分的上磁性层。

    Magnetic recording disk with antiferromagnetically coupled master layer including copper
    15.
    发明授权
    Magnetic recording disk with antiferromagnetically coupled master layer including copper 失效
    具有反铁磁耦合主磁层（包括铜）的磁记录盘

    公开(公告)号：US07419730B2

    公开(公告)日：2008-09-02

    申请号：US10931642

    申请日：2004-08-31

    申请人： Xiaoping Bian ,  Mary Frances Doerner ,  Tetsuya Kanbe ,  Mark Mercado ,  Mohammad Mirzamaani ,  Adam Polcyn ,  Kai Tang

    发明人： Xiaoping Bian ,  Mary Frances Doerner ,  Tetsuya Kanbe ,  Mark Mercado ,  Mohammad Mirzamaani ,  Adam Polcyn ,  Kai Tang

    IPC分类号： G11B5/66

    CPC分类号： G11B5/732 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7325

    摘要： An antiferromagnetically coupled (AFC) magnetic recording medium with an AFC master layer comprising at least two magnetic layers with the top magnetic layer including copper is described. The slave layer is separated from the master layer structure by a nonmagnetic spacer layer selected to antiferromagnetically couple the layers. The master layer structure according to the invention includes a bottom and top layer of distinct ferromagnetic materials. Preferably, the top layer of the master layer is a cobalt alloy including from 1 to 5 at. % copper with an example being CoPt13Cr20B8Cu2. The AFC magnetic layer structure can be used with a variety of substrates including circumferentially textured glass and NiP/AlMg.

    摘要翻译： 描述了具有包括至少两个具有顶部磁性层包括铜的磁性层的AFC主层的反铁磁耦合（AFC）磁记录介质。 通过选择用于反铁磁耦合层的非磁性间隔层将从属层与主层结构分离。 根据本发明的主层结构包括不同铁磁材料的底层和顶层。 优选地，主层的顶层是包括1至5个的钴合金。 ％铜，例如CoPt 13 C 20 20 B 2 Cu 2。 AFC磁性层结构可以与各种基材一起使用，包括圆周纹理玻璃和NiP / AlMg。

    Magnetic recording medium and magnetic recording system using such a magnetic recording medium
    19.
    发明授权
    Magnetic recording medium and magnetic recording system using such a magnetic recording medium 失效
    使用这种磁记录介质的磁记录介质和磁记录系统

    公开(公告)号：US6080476A

    公开(公告)日：2000-06-27

    申请号：US048167

    申请日：1998-03-25

    申请人： Tetsuya Kanbe ,  Yoshio Takahashi ,  Akira Ishikawa ,  Ichiro Tamai ,  Yuzuru Hosoe ,  Yoshifumi Matsuda ,  Kiwamu Tanahashi ,  Tomoo Yamamoto

    发明人： Tetsuya Kanbe ,  Yoshio Takahashi ,  Akira Ishikawa ,  Ichiro Tamai ,  Yuzuru Hosoe ,  Yoshifumi Matsuda ,  Kiwamu Tanahashi ,  Tomoo Yamamoto

    IPC分类号： G11B5/66 ,  G11B5/39 ,  G11B5/64 ,  G11B5/65 ,  H01F10/16

    CPC分类号： G11B5/65 ,  G11B5/64 ,  G11B5/653 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12854 ,  Y10T428/26 ,  Y10T428/265

    摘要： It is an object of the present invention to provide a magnetic recording medium which has a magnetic layer deposited on a substrate through a single-layer underlayer or a multilayer-underlayer, the magnetic layer includes magnetic crystal grains having an acicular structure or amorphous magnetic particles, an average grain size of the magnetic grain and a grain-size dispersion normalized by the average grain size are less than 16 nm and less than 0.5, respectively, a value Ku.multidot.v/kT which results from dividing a product of a magnetic anisotropy constant Ku and a volume v of the magnetic grain by a product of a Boltzmann constant k and an absolute temperature T is selected to be greater than 60, and a film thickness of the magnetic layer falls within twice of the average grain size. Thus, there can be realized a magnetic recording system in which a media noise can be reduced, a high S/N and a low bit error rate can be obtained and which has a high recording density of 2 gigabits per one square inches and an MTBF (mean time between failure) of higher than 300000 hours.

    摘要翻译： 本发明的目的是提供一种通过单层底层或多层下层沉积在基板上的磁性层的磁记录介质，该磁性层包括具有针状结构的磁性晶粒或非晶磁性颗粒 磁性晶粒的平均晶粒尺寸和平均晶粒尺寸归一化的晶粒尺寸分散度分别小于16nm且小于0.5时，分别由磁各向异性常数Ku的乘积产生的Kuxv / kT值 并且通过玻尔兹曼常数k和绝对温度T的乘积将磁性粒子的体积v选择为大于60，并且磁性层的膜厚度落在平均晶粒尺寸的两倍内。 因此，可以实现可以降低媒体噪声的磁记录系统，可以获得高S / N和低误码率，并且其具有高达2吉比特每平方英寸的高记录密度和MTBF （故障之间的平均时间）高于30万小时。