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公开(公告)号：US20220375494A1
公开(公告)日：2022-11-24
申请号：US17817818
申请日：2022-08-05
Inventor： Hitoshi IWASAKI , Naoyuki NARITA , Hirofumi SUTO , Masayuki TAKAGISHI , Tazumi NAGASAWA
IPC: G11B5/127
Abstract: 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 member, a second magnetic member provided between the first magnetic member and the second magnetic pole, a first layer provided between the first and second magnetic members, and a second layer provided between the second magnetic member and the second magnetic pole. The first magnetic member includes first magnetic regions and a first nonmagnetic region. The first nonmagnetic region is between the one of the first magnetic regions and the other one of the first magnetic regions.
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公开(公告)号：US20220283249A1
公开(公告)日：2022-09-08
申请号：US17560081
申请日：2021-12-22
Inventor： Hitoshi IWASAKI , Satoshi SHIROTORI , Akira KIKITSU , Yoshihiro HIGASHI , Tomoya NAKATANI
Abstract: According to one embodiment, a magnetic sensor includes a first sensor part. The first sensor part includes a first magnetic member, a first counter magnetic member, and a first magnetic element including one or a plurality of first extension parts. The first extension part includes a first magnetic layer, a first counter magnetic layer, and a first nonmagnetic layer. The first magnetic layer includes a first portion, a first counter portion, and a first middle portion. The first middle portion is between the first portion and the first counter portion. The first nonmagnetic layer is between the first counter magnetic layer and at least a portion of the first middle portion. An electrical resistance of the first magnetic element has first to third values when first to third magnetic fields are applied to the first magnetic element. The first value is greater than the second and third values.
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公开(公告)号：US20210080519A1
公开(公告)日：2021-03-18
申请号：US16816401
申请日：2020-03-12
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Hitoshi IWASAKI , Akira KIKITSU , Yoshihiro HIGASHI , Satoshi SHIROTORI
Abstract: According to one embodiment, a magnetic sensor includes a first element. The first element includes a first magnetic part, a first magnetic layer, a first nonmagnetic portion, and a first intermediate magnetic layer. The first magnetic part includes first to third portions. The first portion is between the second and third portions. The first portion has a first length and a second length. The second portion has at least one of a third length longer than the first length or a fourth length longer than the second length. The third portion has at least one of a fifth length longer than the first length or a sixth length longer than the second length. The first nonmagnetic portion is provided between the first portion and the first magnetic layer. The first intermediate magnetic layer is provided between the first portion and the first nonmagnetic portion.
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公开(公告)号：US20180252780A1
公开(公告)日：2018-09-06
申请号：US15693272
申请日：2017-08-31
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Hitoshi IWASAKI , Akira KIKITSU , Satoshi SHIROTORI , Masayuki TAKAGISHI
IPC: G01R33/09
CPC classification number: G01R33/091 , G01R33/093
Abstract: In one embodiment, a magnetic sensor has first and second electrode, a magneto-resistive effect element, an insulating layer between the first electrode and the element, a current source portion and a detecting portion. The element has a length in a first direction along a film surface of the element which is larger than that in a second direction along the film surface and perpendicular to the first direction. The element includes first, non-magnetic and second magnetic layers. The magnetization direction of the first magnetic layer is along the first direction. The element is connected to the first and second electrodes. The current source portion is connected to the first and second electrodes. The detecting portion can detect a second harmonic component in an output signal of the element. The first electrode and the element overlap each other in a third direction perpendicular to the first and the second directions.
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5.发明申请公开(公告)号：US20160099014A1
公开(公告)日：2016-04-07
申请号：US14838914
申请日：2015-08-28
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Satoshi SHIROTORI , Yuuzo KAMIGUCHI , Masayuki TAKAGISHI , Hitoshi IWASAKI
CPC classification number: G11B5/3903 , G01R33/093 , G01R33/098 , G11B5/1272 , G11B5/3906 , G11B5/398 , H01L43/02 , H01L43/08 , H01L43/12
Abstract: A magnetoresistive element according to an embodiment includes: a multilayer element including a first magnetic layer, a magnetization direction of the first magnetic layer being pinned, a nonmagnetic layer disposed on the first magnetic layer, a second magnetic layer disposed in a first region on the nonmagnetic layer, a magnetization direction of the second magnetic layer being pinned and antiparallel to the magnetization direction of the first magnetic layer, and a third magnetic layer disposed in a second region that is different from the first region on the nonmagnetic layer near one of two opposite end faces of the nonmagnetic layer, a magnetization direction of the third magnetic layer being changeable by an external magnetic field, a lower face of the nonmagnetic layer being in contact with an upper face of the first magnetic layer.
Abstract translation: 根据实施例的磁阻元件包括：多层元件，包括第一磁性层，第一磁性层被钉扎的磁化方向，设置在第一磁性层上的非磁性层，设置在第一磁性层上的第一区域中的第二磁性层 非磁性层，所述第二磁性层的磁化方向被钉扎并且与所述第一磁性层的磁化方向反平行;以及第三磁性层，设置在与所述非磁性层上的第二区域不同的第二区域 非磁性层的相对端面，第三磁性层的磁化方向由外部磁场变化，非磁性层的下表面与第一磁性层的上表面接触。
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Patent Agency Ranking
6.发明申请SPIN VALVE ELEMENT, HARD DISK HEAD, AND MAGNETIC RECORDING AND REPRODUCING APPARATUS 有权旋转阀元件，硬盘头和磁记录和再现装置公开(公告)号：US20150029609A1
公开(公告)日：2015-01-29
申请号：US14338481
申请日：2014-07-23
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Yuuzo KAMIGUCHI , Satoshi SHIROTORI , Shinobu SUGIMURA , Masayuki TAKAGISHI , Hitoshi IWASAKI
CPC classification number: G11B5/35 , G01R33/093 , G01R33/098 , G01R33/1284 , G11B5/3909 , G11B2005/3996 , H01F10/08 , H01F10/1936 , H01F10/3254
Abstract: A spin valve element according to an embodiment includes: a nonmagnetic base layer; a first terminal including a first magnetic layer connecting to a portion near one of opposing end faces of the nonmagnetic base layer; a second terminal including a second magnetic layer disposed and connecting to the nonmagnetic base layer so as to be at a distance from the first terminal; a third terminal including a third magnetic layer disposed and connecting to the nonmagnetic base layer so as to be at distances from the first and second terminals, the second terminal and the third terminal connecting to a current source that passes a sense current, and the first terminal and one of the second terminal and the third terminal connecting to a voltage detection unit that detects a voltage.
Abstract translation: 根据实施例的自旋阀元件包括：非磁性基底层; 第一端子，包括连接到非磁性基底层的相对端面中的一个附近的部分的第一磁性层; 第二端子，包括设置并连接到所述非磁性基底层以与所述第一端子相距一定距离的第二磁性层; 第三端子，包括设置并连接到非磁性基底层的第三磁性层，以便与第一和第二端子相距一定距离，第二端子和第三端子连接到通过感测电流的电流源，第一端子 并且连接到检测电压的电压检测单元的第二端子和第三端子之一。
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公开(公告)号：US20220335968A1
公开(公告)日：2022-10-20
申请号：US17859041
申请日：2022-07-07
Inventor： Naoyuki NARITA , Masayuki TAKAGISHI , Hitoshi IWASAKI , Tomoyuki MAEDA
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.
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公开(公告)号：US20220233087A1
公开(公告)日：2022-07-28
申请号：US17444987
申请日：2021-08-12
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Hitoshi IWASAKI , Satoshi SHIROTORI , Akira KIKITSU , Yoshihiro HIGASHI
Abstract: According to one embodiment, a magnetic sensor includes a first sensor part, and a conductive member. The first sensor part includes a first magnetic element, a first side magnetic part, and a first counter side magnetic part. The conductive member includes a first corresponding portion along the first magnetic element. The first magnetic element includes a first magnetic layer, a first counter magnetic layer, a direction from the first magnetic layer toward the first counter magnetic layer being along a first direction, and a first intermediate magnetic layer located between the first magnetic layer and the first counter magnetic layer. The first side magnetic part includes a first side magnetic layer. The first counter side magnetic part includes a first counter side magnetic layer. The first intermediate magnetic layer is between the first side magnetic layer and the first counter side magnetic layer in a second direction.
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公开(公告)号：US20220065955A1
公开(公告)日：2022-03-03
申请号：US17177014
申请日：2021-02-16
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Akira KIKITSU , Satoshi SHIROTORI , Hitoshi IWASAKI , Yoshihiro HIGASHI , Yoshinari KUROSAKI
IPC: G01R33/09 , G01R15/20 , G01R31/382 , G01R19/00
Abstract: According to one embodiment, a magnetic sensor includes a first element part. The first element part includes a first magnetic element, a first conductive member, a first magnetic member, and a second magnetic member. The first magnetic element includes a first magnetic layer, a first counter magnetic layer, and a first nonmagnetic layer provided between the first magnetic layer and the first counter magnetic layer. A direction from the first magnetic layer toward the first counter magnetic layer is along a first direction. The second magnetic member is separated from the first magnetic member along a second direction crossing the first direction. The first magnetic element includes a first element region, a first other-element region, and a first intermediate element region. The first magnetic member includes a first partial surface and a second partial surface.
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公开(公告)号：US20210104257A1
公开(公告)日：2021-04-08
申请号：US17015688
申请日：2020-09-09
Inventor： Hitoshi IWASAKI , Masayuki TAKAGISHI , Naoyuki NARITA , Tazumi NAGASAWA , Hirofumi SUTO
Abstract: According to one embodiment, a magnetic recording device includes a magnetic head, and an electrical circuit. The magnetic head includes a magnetic pole, a first shield, and a stacked body provided between the magnetic pole and the first shield. The stacked body includes a first magnetic layer, a second magnetic layer, a first layer provided between the first and second magnetic layers, and a first nonmagnetic layer provided between the first magnetic layer and the first layer. A change rate of an electrical resistance of the stacked body with respect to a change of a current density flowing in the stacked body has a first value when the current density is in a first range, a second value when the current density is in a second range, and a third value when the current density is in a third range.
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