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    • 2. 发明授权
    • Flux cancelling yoke type magnetic transducer head
    • 磁通消除轭型磁换能器头
    • US4734644A
    • 1988-03-29
    • US841259
    • 1986-03-19
    • Shigeyoshi ImakoshiHideo SuyamaYutaka SodaMunekatsu Fukuyama
    • Shigeyoshi ImakoshiHideo SuyamaYutaka SodaMunekatsu Fukuyama
    • G01D5/14G01D5/16G11B5/39G01R33/02H01L43/00
    • G01D5/142G11B5/3903
    • A yoke type magnetic transducer head utilizing a magnetoresistance effect in which a magnetoresistance effect sensing portion is provided so as to magnetically couple a cut-away portion in a magnetic circuit including an operation gap and a magnetic yoke having in its one portion the cut-away portion and in which a first bias magnetic field is applied to the magnetoresistance effect sensing portion by a first magnetic flux that is generated when a current is flowed through the magnetoresistance effect sensing portion, or when a current is flowed through both the magnetoresistance effect sensing portion and a bias conductor, which includes a hard magnetic layer for generating a second magnetic flux by which a second bias magnetic field is applied to the magnetoresistance effect sensing portion and for passing through the magnetic yoke a magnetic flux which cancels at least a part of the first magnetic flux which passes through the magnetic yoke.
    • 一种利用磁阻效应的磁轭型磁换能器头,其中磁阻效应感测部分被设置为磁耦合包括操作间隙的磁路中的切除部分和在其一部分中被切除的磁轭 并且其中通过在电流流过磁阻效应感测部分时产生的第一磁通量或当电流流过磁阻效应感测部分两者时,第一偏置磁场施加到磁阻效应感测部分 以及偏置导体,其包括用于产生第二磁通量的硬磁性层,通过该硬磁性层将第二偏置磁场施加到磁阻效应感测部分,并且通过磁轭,磁通量抵消了至少一部分 第一磁通量通过磁轭。
    • 8. 发明授权
    • Thin-film magnetic head, magnetoresistance effect magnetic head and
composite magnetic head
    • 薄膜磁头,磁阻效应磁头和复合磁头
    • US5822159A
    • 1998-10-13
    • US833186
    • 1997-04-04
    • Munekatsu FukuyamaYasuo SasakiYutaka SodaKoji FukumotoTetsuo Sekiya
    • Munekatsu FukuyamaYasuo SasakiYutaka SodaKoji FukumotoTetsuo Sekiya
    • G11B5/02G11B5/31G11B5/39G11B5/465G11B5/33G11B5/127
    • G11B5/3967G11B5/3113G11B5/465G11B5/02G11B5/3906G11B5/3912
    • A thin-film magnetic head, a magnetoresistance effect magnetic head and an MR inductive head are disclosed. The thin-film magnetic head has one of thin-film magnetic cores stacked on a substrate and formed of two magnetic films and a non-magnetic film held between them, with a current flowing through the thin-film magnetic core in the direction of hard axis thereof. The magnetoresistance effect magnetic head has one of a pair of shield cores having a magnetoresistive element between them formed of two magnetic films and a non-magnetic film held between them, the magnetoresistive element being electrically connected to the shield core, with a sense current flowing through the shield core. The current flowing through the one shield core via the magnetoresistive element is preferably an AC of decrement amplitude for demagnetizing the shield core along with a DC sense current. Also, this current preferably flows in the direction of hard axis of the shield core so that magnetic properties of the shield core are stabilized or demagnetized by the magnetic field generated in the direction of easy axis. The MR inductive head has a second thin-film magnetic core as a common magnetic body of an MR head and an inductive head on one substrate, formed of two magnetic films and a non-magnetic film held between them, with a current flowing through the second thin-film magnetic core in the direction of hard axis thereof.
    • 公开了一种薄膜磁头,磁阻效应磁头和MR感应头。 薄膜磁头具有堆叠在基板上的薄膜磁芯之一,由两个磁性膜和保持在它们之间的非磁性膜形成,电流沿着硬的方向流过薄膜磁芯 轴。 磁阻效应磁头具有在两个磁膜之间具有磁阻元件的一对屏蔽芯之一和保持在它们之间的非磁性膜之间,磁阻元件电连接到屏蔽芯,感测电流流过 通过屏蔽芯。 通过磁阻元件流过一个屏蔽芯的电流优选为用于使屏蔽芯与DC感测电流一起消磁的递减幅度的AC。 此外,该电流优选沿着屏蔽芯的硬轴的方向流动,使得屏蔽芯的磁性能由容易轴方向产生的磁场稳定或退磁。 MR感应头具有第二薄膜磁芯,作为MR磁头的公共磁体和一个基板上的感应磁头,由两个磁性膜和保持在它们之间的非磁性膜形成,电流流经 第二薄膜磁芯在其硬轴方向上。
    • 10. 发明授权
    • Thin film magnetic head, magnetoresistance effect magnetic head and
composite magnetic head
    • 薄膜磁头,磁阻效应磁头和复合磁头
    • US5872691A
    • 1999-02-16
    • US987652
    • 1997-12-09
    • Munekatsu FukuyamaYasuo SasakiYutaka SodaKoji FukumotoTetsuo Sekiya
    • Munekatsu FukuyamaYasuo SasakiYutaka SodaKoji FukumotoTetsuo Sekiya
    • G11B5/02G11B5/31G11B5/39G11B5/465
    • G11B5/3967G11B5/3113G11B5/465G11B5/02G11B5/3906G11B5/3912
    • A thin-film magnetic head, a magnetoresistance effect magnetic head and an MR inductive head are disclosed. The thin-film magnetic head has one of thin-film magnetic cores stacked on a substrate and formed of two magnetic films and a non-magnetic film held between them, with a current flowing through the thin-film magnetic core in the direction of hard axis thereof. The magnetoresistance effect magnetic head has one of a pair of shield cores having a magnetoresistive element between them formed of two magnetic films and a non-magnetic film held between them, the magnetoresistive element being electrically connected to the shield core, with a sense current flowing through the shield core. The current flowing through the one shield core via the magnetoresistive element is preferably an AC of decrement amplitude for demagnetizing the shield core along with a DC sense current. Also, this current preferably flows in the direction of hard axis of the shield core so that magnetic properties of the shield core are stabilized or demagnetized by the magnetic field generated in the direction of easy axis. The MR inductive head has a second thin-film magnetic core as a common magnetic body of an MR head and an inductive head on one substrate, formed of two magnetic films and a non-magnetic film held between them, with a current flowing through the second thin-film magnetic core in the direction of hard axis thereof.
    • 公开了一种薄膜磁头,磁阻效应磁头和MR感应头。 薄膜磁头具有堆叠在基板上的薄膜磁芯之一,由两个磁性膜和保持在它们之间的非磁性膜形成,电流沿着硬的方向流过薄膜磁芯 轴。 磁阻效应磁头具有在两个磁膜之间具有磁阻元件的一对屏蔽芯之一和保持在它们之间的非磁性膜之间,磁阻元件电连接到屏蔽芯,感测电流流过 通过屏蔽芯。 通过磁阻元件流过一个屏蔽芯的电流优选为用于使屏蔽芯与DC感测电流一起消磁的递减幅度的AC。 此外,该电流优选沿着屏蔽芯的硬轴的方向流动,使得屏蔽芯的磁性能由容易轴方向产生的磁场稳定或退磁。 MR感应头具有第二薄膜磁芯,作为MR磁头的公共磁体和一个基板上的感应磁头,由两个磁性膜和保持在它们之间的非磁性膜形成,电流流经 第二薄膜磁芯在其硬轴方向上。