公开(公告)号：US20220005497A1

公开(公告)日：2022-01-06

申请号：US17177331

申请日：2021-02-17

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

Inventor： Masayuki TAKAGISHI ,  Naoyuki NARITA ,  Tomoyuki MAEDA ,  Tazumi NAGASAWA ,  Hitoshi IWASAKI ,  Hirofumi SUTO

IPC: G11B5/31

Abstract: According to one embodiment, a magnetic head includes first and second magnetic poles, and a stacked body provided between the first and second magnetic poles. The stacked body includes a first magnetic layer, a second magnetic layer provided between the first magnetic layer and the second magnetic pole, a third magnetic layer provided between the second magnetic layer and the second magnetic pole, a first nonmagnetic layer provided between the first and second magnetic layers, a second nonmagnetic layer provided between the second and third magnetic layers, and a third nonmagnetic layer provided between the first magnetic pole and the first magnetic layer. A first magnetic pole length of the first magnetic pole is less than a second magnetic pole length of the second magnetic pole. A first magnetic layer length of the first magnetic layer is greater than a second magnetic layer length of the second magnetic layer.

公开(公告)号：US20210375312A1

公开(公告)日：2021-12-02

申请号：US17177274

申请日：2021-02-17

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

Inventor： Naoyuki NARITA ,  Masayuki TAKAGISHI ,  Hitoshi IWASAKI ,  Tomoyuki MAEDA

IPC: G11B5/667

Abstract: According to one embodiment, a magnetic head includes a first magnetic pole, a second magnetic pole, and a stacked body provided between the first and second magnetic poles. The stacked body includes a first magnetic layer, a second magnetic layer provided between the first magnetic pole and the first magnetic layer, a third magnetic layer provided between the first magnetic pole and the second magnetic layer, a first nonmagnetic layer provided between the first magnetic layer and the second magnetic pole, a second nonmagnetic layer provided between the second and first magnetic layers, and a third nonmagnetic layer provided between the third and second magnetic layers. The third magnetic layer includes first and second elements. The first and second magnetic layers do not include the second element. Or concentrations of the second element in the first and second magnetic layers are less than in the third magnetic layer.

公开(公告)号：US20210074320A1

公开(公告)日：2021-03-11

申请号：US16820917

申请日：2020-03-17

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

Inventor： Masayuki TAKAGISHI ,  Naoyuki NARITA ,  Tomoyuki MAEDA ,  Hitoshi IWASAKI ,  Hirofumi SUTO ,  Tazumi NAGASAWA

IPC: G11B5/127 ,  G11B5/31 ,  G11B5/02 ,  G11B5/66

Abstract: According to one embodiment, a magnetic head includes a magnetic pole, a first shield, a first magnetic layer, a second magnetic layer, a third magnetic layer, a first intermediate layer, a second intermediate layer, a third intermediate layer, and a fourth intermediate layer. The first magnetic layer is provided between the magnetic pole and the first shield. The second magnetic layer is provided between the first magnetic layer and the first shield. The third magnetic layer is provided between the second magnetic layer and the first shield. The first intermediate layer is provided between the magnetic pole and the first magnetic layer. The second intermediate layer is provided between the first magnetic layer and the second magnetic layer. The third intermediate layer is provided between the second magnetic layer and the third magnetic layer. The fourth intermediate layer is provided between the third magnetic layer and the first shield.

公开(公告)号：US20190115047A1

公开(公告)日：2019-04-18

申请号：US16218604

申请日：2018-12-13

Applicant: Kabushiki Kaisha Toshiba

Inventor： Kenichiro YAMADA ,  Shuichi MURAKAMI ,  Naoyuki NARITA ,  Katsuhiko KOUI ,  Akihiko TAKEO ,  Mariko SHIMIZU ,  Hitoshi IWASAKI

IPC: G11B5/127 ,  G11B5/31 ,  G11B5/17 ,  G11B5/235

CPC classification number: G11B5/1278 ,  G11B5/17 ,  G11B5/235 ,  G11B5/3133 ,  G11B5/314 ,  G11B5/3143 ,  G11B5/3146 ,  G11B2005/0024

Abstract: According to one embodiment, a magnetic recording head includes a magnetic pole, a stacked body, and a first non-magnetic layer. The stacked body includes a first magnetic layer, a second magnetic layer provided between the first magnetic layer and the magnetic pole, and a non-magnetic intermediate layer provided between the first magnetic layer and the second magnetic layer. The first non-magnetic layer is provided between the second magnetic layer and the magnetic pole, and contacts the magnetic pole and the second magnetic layer. The first magnetic layer has a first thickness and a first saturation magnetic flux density. The second magnetic layer has a second thickness and a second saturation magnetic flux density. A second product of the second thickness and the second saturation magnetic flux density is larger than a first product of the first thickness and the first saturation magnetic flux density.

公开(公告)号：US20180261241A1

公开(公告)日：2018-09-13

申请号：US15703089

申请日：2017-09-13

Applicant: Kabushiki Kaisha Toshiba

Inventor： Naoyuki NARITA ,  Hitoshi IWASAKI ,  Mariko SHIMIZU ,  Katsuhiko KOUI ,  Kenichiro YAMADA

IPC: G11B5/31 ,  G11B5/66 ,  G11B5/48 ,  G11B5/187

CPC classification number: G11B5/315 ,  G11B5/187 ,  G11B5/3116 ,  G11B5/312 ,  G11B5/4813 ,  G11B5/4826 ,  G11B5/66

Abstract: According to one embodiment, a magnetic head includes a magnetic pole, and a first shield, and a stacked body provided between the magnetic pole and the first shield. The stacked body includes a first layer, a second layer and a third layer. The first layer includes at least one first element selected from the group consisting of Fe, Co, and Ni. The second layer is provided between the magnetic pole and the first layer, and includes at least one second element selected from the group consisting of Cr, V, Mn, Ti, and Sc. The third layer is provided between the first layer and the first shield, and includes at least one third element selected from the group consisting of Cr, V, Mn, Ti, and Sc.

公开(公告)号：US20160027457A1

公开(公告)日：2016-01-28

申请号：US14875522

申请日：2015-10-05

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Yousuke ISOWAKI ,  Satoshi SHIROTORI ,  Masayuki TAKAGISHI ,  Hitoshi IWASAKI

IPC: G11B5/39 ,  G11B5/127

CPC classification number: G11B5/3912 ,  G01R33/098 ,  G11B5/1272 ,  G11B5/3163 ,  G11B5/3932 ,  G11B5/398 ,  G11B2005/3996 ,  H01L43/08 ,  H01L43/12 ,  Y10T29/49826

Abstract: According to one embodiment, a magnetoresistance effect element includes first and second shields, first and second side magnetic units, a stacked body, and a hard bias unit. The first side magnetic unit includes a first soft magnetic layer, a first nonmagnetic intermediate layer, and a second soft magnetic layer. The second side magnetic unit includes a third soft magnetic layer, a second nonmagnetic intermediate layer, and a fourth soft magnetic layer. The stacked body includes a fifth ferromagnetic layer, a third nonmagnetic intermediate layer, and a sixth ferromagnetic layer. The hard bias unit is provided between the first and second shields. A first distance between the first and fifth magnetic layers is shorter than a second distance between the second and sixth magnetic layers. A third distance between the third and fifth magnetic layers is shorter than a fourth distance between the fourth and sixth magnetic layers.

公开(公告)号：US20140233135A1

公开(公告)日：2014-08-21

申请号：US14182540

申请日：2014-02-18

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Susumu HASHIMOTO ,  Masayuki TAKAGISHI ,  Shuichi MURAKAMI ,  Yousuke ISOWAKI ,  Naoki HASE ,  Hitoshi IWASAKI

IPC: G11B5/39

CPC classification number: G11B5/3912 ,  G01R33/093 ,  G11B5/3906 ,  G11B5/3932 ,  G11B5/398 ,  H01F10/325

Abstract: According to one embodiment, a magnetoresistance effect element includes first and second shields, a stacked body and a hard bias unit. The stacked body includes first and second magnetic layers, an intermediate layer and a first Ru layer. A magnetization of the first magnetic layer is changeable. A magnetization of the second magnetic layer is changeable. The intermediate layer is nonmagnetic. The first Ru layer is provided between the first shield and the first magnetic layer. A thickness of the first Ru layer is not less than 1.5 nanometers and not more than 2.5 nanometers. The hard bias unit is provided between the first shield and the second shield. A first direction from the first shield toward the second shield intersects a second direction from the stacked body toward the hard bias unit.

Abstract translation: 根据一个实施例，磁阻效应元件包括第一和第二屏蔽层，堆叠体和硬偏置单元。 层叠体包括第一和第二磁性层，中间层和第一Ru层。 第一磁性层的磁化是可变化的。 第二磁性层的磁化是可变化的。 中间层是非磁性的。 第一Ru层设置在第一屏蔽和第一磁性层之间。 第一Ru层的厚度不小于1.5纳米且不大于2.5纳米。 硬偏置单元设置在第一屏蔽和第二屏蔽之间。 从第一屏蔽朝向第二屏蔽的第一方向与从层叠体朝向硬偏压单元的第二方向相交。

公开(公告)号：US20140198410A1

公开(公告)日：2014-07-17

申请号：US14184406

申请日：2014-02-19

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Kenichiro YAMADA ,  Hitoshi IWASAKI ,  Masayuki TAKAGISHI

IPC: G11B5/35

CPC classification number: G11B5/09 ,  G11B5/1278 ,  G11B5/3123 ,  G11B5/3133 ,  G11B5/35 ,  G11B20/10222 ,  G11B2005/001

Abstract: An example magnetic recording apparatus includes a magnetic recording medium and a magnetic recording head. The magnetic recording head includes a first magnetic pole to apply a recording magnetic field to a magnetic recording medium, a spin torque oscillator provided parallel to the first magnetic pole, a first coil which surrounds the first magnetic pole, to magnetize the first magnetic pole, and a second coil to pass a current independently of the first coil and magnetize the first magnetic pole. A signal processor writes and reads a signal on the magnetic recording medium by using the magnetic recording head.

Abstract translation: 一种示例性的磁记录装置包括磁记录介质和磁记录头。 磁记录头包括用于向磁记录介质施加记录磁场的第一磁极，平行于第一磁极设置的自旋扭矩振荡器，围绕第一磁极的第一线圈，以磁化第一磁极， 以及第二线圈，以独立于所述第一线圈通过电流并使所述第一磁极励磁。 信号处理器通过使用磁记录头在磁记录介质上写入和读取信号。