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    • 3. 发明授权
    • GMR head, method for its manufacture, and magnetic disc drive utilizing the head
    • GMR头,其制造方法和利用磁头的磁盘驱动器
    • US06327121B1
    • 2001-12-04
    • US09191940
    • 1998-11-13
    • Keiichi NagasawaYutaka ShimizuHitoshi KishiAtsushi TanakaReiko Kondoh
    • Keiichi NagasawaYutaka ShimizuHitoshi KishiAtsushi TanakaReiko Kondoh
    • G11B539
    • B82Y25/00B82Y10/00G11B5/012G11B5/3903G11B5/3929G11B5/3945G11B2005/3996Y10S977/934
    • The invention provides a GMR head in which an adequate bias point may be set for the free magnetic layer 12 of the GMR head by suppressing the static magnetic field in the free magnetic layer which arises from a pinned magnetic layer 14 of the GMR head. The GMR head comprises a sensor section 10, a magnetic field correction section 20 disposed laterally adjacent to the sensor section 10. The sensor section 10 includes, in addition to the free magnetic layer 12 and the pinned magnetic layer 14, an intermediate layer 13 and an anti-ferromagnetic layer 15 in a specific arrangement. The magnetic field correction section 20 may have the same structure as the sensor section 10. Because the sensor section 10 and the magnetic field correction section 20 are provided independently and disposed laterally adjacent to each other in the direction of height of the GMR head, the magnetic field emerging from the pinned magnetic layer 14 into the free magnetic layer 12 is suppressed by the magnetic field correction section 20. The magnetic field correction section 20 may be easily formed together and simultaneously with the sensor section 10.
    • 本发明提供一种GMR头,其中可以通过抑制由GMR头的钉扎磁性层14产生的自由磁性层中的静态磁场,为GMR头的自由磁性层12设置适当的偏置点。 GMR头包括传感器部分10,与传感器部分10相邻设置的磁场校正部分20.传感器部分10除了自由磁性层12和固定磁性层14之外还包括中间层13和 具有特定布置的反铁磁层15。 磁场校正部20可以具有与传感器部10相同的结构。由于传感器部10和磁场校正部20独立地设置并且在GMR头的高度方向上彼此横向相邻设置, 通过磁场校正部20抑制从被钉扎磁性层14向自由磁性层12出射的磁场。磁场校正部20可以容易地与传感器部10一起形成。
    • 10. 发明授权
    • Spin-valve magnetic head with the pinned layer having different directions for its magnetization axis and its easy axis
    • 旋转磁头磁头,其固定层具有不同的方向,用于其磁化轴和易轴
    • US06355115B1
    • 2002-03-12
    • US09434094
    • 1999-11-05
    • Keiichi NagasakaYutaka ShimizuHitoshi KishiAtsushi Tanaka
    • Keiichi NagasakaYutaka ShimizuHitoshi KishiAtsushi Tanaka
    • C21D104
    • B82Y25/00B82Y10/00G11B5/3903G11B2005/3996Y10T29/49034
    • A method is disclosed for fabricating a spin-valve magnetic head including a layered body of a first ferromagnetic layer having a first easy axis of magnetization extending in a first direction, a non-magnetic layer formed on the first ferromagnetic layer, a second ferromagnetic layer provided on the non-magnetic layer, and an anti-ferromagnetic layer provided on the second ferromagnetic layer in exchange coupling therewith. The method includes a first thermal annealing process with the steps of annealing the layered body in a first annealing state and applying a magnetic field to the layered body in a second direction different from the first direction, while maintaining the layered body in the first annealing state. The method further includes a second thermal annealing process with the steps of annealing the layered body, after the first thermal annealing process, in a second annealing state and applying a magnetic field in a third direction different from the second direction while maintaining the layered body in the second annealing state.
    • 公开了一种用于制造自旋阀磁头的方法,该自旋阀磁头包括具有沿第一方向延伸的第一容易磁化轴的第一铁磁层的层叠体,形成在第一铁磁层上的非磁性层,第二铁磁层 设置在非磁性层上,以及设置在第二铁磁层上的与反铁磁层交换耦合的反铁磁层。 该方法包括:第一热退火处理,其具有以第一退火状态退火层叠体的步骤,并且在不同于第一方向的第二方向上向层叠体施加磁场,同时将层状体保持在第一退火状态 。 该方法还包括第二热退火处理,其中在第一热退火处理之后退火分层体处于第二退火状态,并且在不同于第二方向的第三方向施加磁场,同时将层状体保持在 第二退火状态。