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    Spin valve read element using a permanent magnet to form a pinned layer
    1.
    发明授权
    Spin valve read element using a permanent magnet to form a pinned layer 失效
    旋转阀读取元件使用永磁体形成固定层

    公开(公告)号：US06754054B2

    公开(公告)日：2004-06-22

    申请号：US10270873

    申请日：2002-10-15

    申请人： Michael A. Seigler ,  Paul E. Anderson ,  Alexander M. Shukh

    发明人： Michael A. Seigler ,  Paul E. Anderson ,  Alexander M. Shukh

    IPC分类号： G11B527

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B2005/0008 ,  G11C11/16 ,  H01F10/324 ,  H01F10/3268

    摘要： A spin valve read element for use with, for example, magnetic recording media, includes a permanent magnet as one of the multilayers that make up the spin valve. The spin valve may also include a pinned ferromagnetic layer, an antiferromagnetic coupling inducing layer, a reference ferromagnetic layer, an electroconductive layer, and/or a free ferromagnetic layer. Epitaxy breaking layers may also be advantageously positioned within the spin valve. The multilayers of the spin valve may be constructed as a current perpendicular to the plane or a current parallel to the plane type spin valve.

    摘要翻译： 用于例如磁记录介质的自旋阀读取元件包括作为构成自旋阀的多层之一的永磁体。 自旋阀还可以包括钉扎铁磁层，反铁磁耦合诱导层，参考铁磁层，导电层和/或自由铁磁层。 外延破裂层也可有利地定位在自旋阀内。 自旋阀的多层可以被构造成垂直于平面的电流或平行于平面型自旋阀的电流。

    Yoke-type magnetic head and magnetic recording/reproducing device
    3.
    发明授权
    Yoke-type magnetic head and magnetic recording/reproducing device 失效
    轭式磁头和磁记录/再现装置

    公开(公告)号：US06804089B2

    公开(公告)日：2004-10-12

    申请号：US10424844

    申请日：2003-04-29

    申请人： Tomomi Funayama ,  Yuichi Osawa ,  Masatoshi Yoshikawa ,  Hiroaki Yoda

    发明人： Tomomi Funayama ,  Yuichi Osawa ,  Masatoshi Yoshikawa ,  Hiroaki Yoda

    IPC分类号： G11B527

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/1278 ,  G11B5/3183 ,  G11B5/3903 ,  G11B5/3925 ,  G11B2005/3996

    摘要： The objective of this invention is to provide a yoke-type magnetic head and a magnetic recording device in which Barkhausen noise is low. It is possible to induce a magnetic flux efficiently within a magnetic head by using a granular magnetic film that exhibits both soft magnetic properties and a high resistance, which suppresses any shunt of the flow of the sense current into the magnetic yokes, thus preventing any deterioration insensitivity. Since this means that eddy currents can be suppressed, even during use in high-frequency regions, the frequency response characteristics are also improved. In addition, since the magnetic grains within the granular magnetic film are nano-sized, the dimensions of magnetic domains therein are also miniaturized to match that size, and thus there is also substantially no movement of the magnetic domain walls and this miniaturization also makes it possible to suppress the generation of Barkhausen noise. A similar effect can also be obtained by inducing maze domains within the magnetic yokes.

    摘要翻译： 本发明的目的是提供一种轭型磁头和一种其中巴克豪森噪声低的磁记录装置。 通过使用表现出软磁性能和高电阻的粒状磁性膜，能够有效地在磁头内引起磁通，这抑制了磁轭中感应电流流动的任何分流，从而防止任何劣化 不敏感。 由于这意味着即使在高频区域使用时也能够抑制涡流，所以也提高了频率响应特性。 此外，由于粒状磁性膜内的磁性粒子是纳米尺寸的，因此其中的磁畴的尺寸也小型化以与该尺寸相匹配，因此也基本上没有磁畴壁的移动，并且这种小型化也使得它 可能抑制巴克豪森噪音的产生。 通过诱导磁轭内的迷宫结构也可以获得类似的效果。