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    Magnetic memory device
    1.
    发明授权
    Magnetic memory device 有权

    公开(公告)号：US10902900B2

    公开(公告)日：2021-01-26

    申请号：US16351745

    申请日：2019-03-13

    Applicant: KABUSHIKI KAISHA TOSHIBA

    Inventor： Katsuhiko Koui ,  Hiroaki Yoda ,  Tomoaki Inokuchi ,  Naoharu Shimomura ,  Hideyuki Sugiyama

    IPC: H01L43/08 ,  H01L43/10 ,  H01L27/22 ,  G11C11/16

    Abstract: A magnetic memory device includes a conductive member, a stacked body, and a controller. The stacked body includes a first magnetic layer, a second magnetic layer provided between the conductive member and the first magnetic layer, and a third magnetic layer stacked with the first magnetic layer and the second magnetic layer. The controller causes a current to flow in the conductive member. The controller causes a current to flow between the conductive member and the stacked body. The controller is able to identify three or more levels of an electrical resistance value of the stacked body.

    MAGNETIC RECORDING HEAD AND DISK DEVICE COMPRISING THE MAGNETIC RECORDING HEAD
    3.
    发明申请
    MAGNETIC RECORDING HEAD AND DISK DEVICE COMPRISING THE MAGNETIC RECORDING HEAD 有权
    磁记录头和包含磁记录头的磁盘装置

    公开(公告)号：US20170061995A1

    公开(公告)日：2017-03-02

    申请号：US14945269

    申请日：2015-11-18

    Applicant: Kabushiki Kaisha Toshiba

    Inventor： Tomoko Taguchi ,  Katsuhiko Koui

    IPC: G11B5/39

    CPC classification number: G11B5/1278 ,  G11B5/235 ,  G11B5/314 ,  G11B5/3153 ,  G11B5/3176 ,  G11B2005/0024

    Abstract: According to one embodiment, a magnetic recording head includes an air-bearing surface, a main magnetic pole, a write shield opposed to the main magnetic pole with a write gap therebetween, a high-frequency oscillator which includes a spin injection layer and a oscillation layer and is provided between the main magnetic pole and the write shield, the oscillation layer and the spin injection layer including a stack surface extending in a direction intersecting with the air-bearing surface, and a magnetic material layer which is provided in at least one of the main magnetic pole and the write shield, faces the high-frequency oscillator, and has negative magnetic anisotropy with respect to a direction intersecting with the stack surfaces of the high-frequency oscillator.

    Abstract translation: 根据一个实施例，磁记录头包括空气轴承表面，主磁极，与主磁极相对的写入屏蔽，其间具有写入间隙，高频振荡器包括自旋注入层和振荡 并且设置在主磁极和写入屏蔽之间，振荡层和自旋注入层包括在与空气轴承表面相交的方向上延伸的堆叠表面;以及磁性材料层，其设置在至少一个 主磁极和写屏蔽面对高频振荡器，并且相对于与高频振荡器的堆叠表面交叉的方向具有负的磁各向异性。

    MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING APPARATUS
    5.
    发明申请
    MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING APPARATUS 有权
    磁记录头和磁记录装置

    公开(公告)号：US20150310881A1

    公开(公告)日：2015-10-29

    申请号：US14329174

    申请日：2014-07-11

    Applicant: Kabushiki Kaisha Toshiba

    Inventor： Katsuhiko Koui

    IPC: G11B5/35 ,  G11B5/60

    CPC classification number: G11B5/314 ,  G11B2005/001 ,  G11B2005/0024

    Abstract: The magnetic recording head according to an embodiment includes an air bearing surface configured to face a magnetic recording medium, a main magnetic pole including a main magnetic pole distal end, a first spin injection layer disposed on a leading side of the main magnetic pole, a field generation layer disposed on a trailing side of the main magnetic pole, and an intermediate layer configured to connect electrically the field generation layer to the first spin injection layer. The main magnetic pole is configured to apply a recording magnetic field to the magnetic recording medium.

    Abstract translation: 根据实施例的磁记录头包括被配置为面对磁记录介质的空气轴承表面，包括主磁极远端的主磁极，设置在主磁极的前侧的第一自旋注入层， 设置在主磁极的后侧的场产生层，以及被配置为将场产生层电连接到第一自旋注入层的中间层。 主磁极被配置为向磁记录介质施加记录磁场。

    Magnetic head with multiple reproducing elements each having magnetically coupled free layers, magnetic recording reproducing apparatus and magnetic head manufacturing method
    6.
    发明授权
    Magnetic head with multiple reproducing elements each having magnetically coupled free layers, magnetic recording reproducing apparatus and magnetic head manufacturing method 有权
    具有各自具有磁耦合自由层的多个再现元件的磁头，磁记录再现装置和磁头制造方法

    公开(公告)号：US09171558B2

    公开(公告)日：2015-10-27

    申请号：US14152974

    申请日：2014-01-10

    Applicant: KABUSHIKI KAISHA TOSHIBA

    Inventor： Akihiko Takeo ,  Kazuto Kashiwagi ,  Kenichiro Yamada ,  Katsuhiko Koui ,  Tomomi Funayama

    IPC: G11B5/39 ,  G11B5/31 ,  G11B5/29 ,  G11B5/48 ,  G11B5/49

    CPC classification number: G11B5/3163 ,  G11B5/29 ,  G11B5/3909 ,  G11B5/3912 ,  G11B5/3932 ,  G11B5/3958 ,  G11B5/4886 ,  G11B5/4976

    Abstract: A magnetic head includes a plurality of reproducing elements so that the magnetic head can acquire reproduction signals from a plurality of tracks at the same time. The magnetic head includes a first reproducing element, a first magnetic film formed on a first side wall of the first reproducing element with a first side wall insulating film interposed therebetween, a second magnetic film formed on a second side wall of the first reproducing element with a second side wall insulating film interposed therebetween, a second reproducing element electrically isolated from the first reproducing element and formed on the first magnetic film, a third magnetic film formed on the first magnetic film, and a fourth magnetic film formed on the first reproducing element and electrically isolated from the second reproducing element.

    Abstract translation: 磁头包括多个再现元件，使得磁头可以同时从多个轨道获取再现信号。 磁头包括第一再现元件，形成在第一再现元件的第一侧壁上的第一磁性膜，其间插入有第一侧壁绝缘膜，形成在第一再现元件的第二侧壁上的第二磁性膜， 介于其间的第二侧壁绝缘膜，与第一再现元件电隔离并形成在第一磁性膜上的第二再现元件，形成在第一磁性膜上的第三磁性膜和形成在第一再现元件上的第四磁性膜 并且与第二再现元件电隔离。

    Magnetic head, magnetic head assembly, and magnetic recording/reproduction apparatus
    8.
    发明授权
    Magnetic head, magnetic head assembly, and magnetic recording/reproduction apparatus 有权
    磁头，磁头组件和磁记录/再现设备

    公开(公告)号：US08953283B2

    公开(公告)日：2015-02-10

    申请号：US14101206

    申请日：2013-12-09

    Applicant: Kabushiki Kaisha Toshiba

    Inventor： Mariko Shimizu ,  Katsuhiko Koui ,  Shuichi Murakami ,  Hiromi Yuasa

    IPC: G11B5/127 ,  G11B5/31 ,  G11B5/00

    CPC classification number: G11B5/35 ,  G11B5/1278 ,  G11B5/314 ,  G11B2005/001

    Abstract: According to one embodiment, a magnetic head includes a spin torque oscillator formed between a main magnetic pole and auxiliary magnetic pole. The spin torque oscillator includes a transmission-type spin transfer layer, first interlayer, oscillation layer, second interlayer, and reflection-type spin transfer layer. The transmission-type spin transfer layer includes a first perpendicular magnetization film and first interface magnetic layer. The first interface magnetic layer contains at least one element selected from Fe, Co, and Ni, and at least one element selected from Cr, V, Mn, Ti, and Sc. The reflection-type spin transfer layer includes a second perpendicular magnetization film.

    Abstract translation: 根据一个实施例，磁头包括形成在主磁极和辅助磁极之间的自旋扭矩振荡器。 自旋转矩振荡器包括透射型自旋转移层，第一中间层，振荡层，第二中间层和反射型自旋转移层。 透射型自旋转移层包括第一垂直磁化膜和第一界面磁性层。 第一界面磁性层含有选自Fe，Co和Ni中的至少一种元素，以及选自Cr，V，Mn，Ti和Sc中的至少一种元素。 反射型自旋转移层包括第二垂直磁化膜。

    Magnetic head pole including laminated structure having magnetic and nonmagnetic layers
    9.
    发明授权
    Magnetic head pole including laminated structure having magnetic and nonmagnetic layers 有权
    磁头极包括具有磁性和非磁性层的层压结构

    公开(公告)号：US08755147B2

    公开(公告)日：2014-06-17

    申请号：US14019110

    申请日：2013-09-05

    Applicant: Kabushiki Kaisha Toshiba

    Inventor： Takuya Matsumoto ,  Kenichiro Yamada ,  Masayuki Takagishi ,  Katsuhiko Koui ,  Hitoshi Iwasaki

    IPC: G11B5/127

    CPC classification number: G11B5/1278 ,  G11B5/3133

    Abstract: According to one embodiment, a magnetic head includes a main pole configured to apply a recording magnetic field to a recording layer of a recording medium, a return pole opposed to the main pole with a write gap therebetween, and a high-frequency oscillator between respective facing surfaces of the main pole and the return pole and configured to produce a high-frequency magnetic field. At least one of the main and return poles faces the high-frequency oscillator and includes a laminated structure portion includes a magnetic layer and a nonmagnetic layer laminated to one another.

    Abstract translation: 根据一个实施例，磁头包括：主极，被配置为向记录介质的记录层施加记录磁场;与主极相对的返回极与它们之间具有写入间隔;以及高频振荡器， 主极和返回极的面对表面，并被配置为产生高频磁场。 主极和返极两者中的至少一个面向高频振荡器，并且包括层叠结构部分，其包括彼此层叠的磁性层和非磁性层。

    Magnetic memory device with nonmagnetic layer between two magnetic layers
    10.
    发明授权
    Magnetic memory device with nonmagnetic layer between two magnetic layers 有权

    公开(公告)号：US10811067B2

    公开(公告)日：2020-10-20

    申请号：US16119003

    申请日：2018-08-31

    Applicant: Kabushiki Kaisha Toshiba

    Inventor： Altansargai Buyandalai ,  Satoshi Shirotori ,  Yuichi Ohsawa ,  Hideyuki Sugiyama ,  Mariko Shimizu ,  Hiroaki Yoda ,  Katsuhiko Koui

    IPC: G11C11/16 ,  H01L43/02 ,  H01L27/22 ,  H01L43/12

    Abstract: According to one embodiment, a magnetic memory device includes a conductive layer, a first magnetic layer, a second magnetic layer, and a first nonmagnetic layer. The conductive layer includes first and second regions, and a third region between the first region and the second region. The second magnetic layer is provided between the third region and the first magnetic layer in a first direction crossing a second direction. The second direction is from the first region toward the second region. The first nonmagnetic layer is provided between the first and second magnetic layers. The second region includes first to third conductive portions. A direction from the first conductive portion toward the second conductive portion is aligned with a third direction. The third direction crosses a plane including the first and second directions. The third conductive portion is between the first and second conductive portions in the third direction.

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