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1. 发明授权

US11626130B2 Magnetic head with stacked body having specified compositions of magnetic and nonmagnetic layers thereof 有权
公开(公告)号：US11626130B2
公开(公告)日：2023-04-11
申请号：US17859041
申请日：2022-07-07
申请人： KABUSHIKI KAISHA TOSHIBA , TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
发明人： Naoyuki Narita , Masayuki Takagishi , Hitoshi Iwasaki , Tomoyuki Maeda
IPC分类号： G11B5/235 , G11B5/31 , G11B5/127 , G11B5/667
摘要： 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.

2. 发明授权

US11568890B2 Magnetic recording device and magnetic recording method utilizing assisted magnetic recording 有权
公开(公告)号：US11568890B2
公开(公告)日：2023-01-31
申请号：US17393674
申请日：2021-08-04
申请人： KABUSHIKI KAISHA TOSHIBA , TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
发明人： Hirofumi Suto , Tazumi Nagasawa , Masayuki Takagishi , Naoyuki Narita , Tomoyuki Maeda , Hitoshi Iwasaki
IPC分类号： G11B5/31 , G11B5/245 , G11B5/012 , G11B5/23 , G11B5/187
摘要： According to one embodiment, a magnetic recording device for utilizing assisted magnetic recording includes a magnetic head, a first circuit, a second circuit, a third circuit, and a controller. The magnetic head includes a first magnetic pole, a second magnetic pole, a magnetic element, and a coil. The magnetic element is located between the first magnetic pole and the second magnetic pole. The magnetic element includes a first magnetic layer. The first circuit is configured to supply a coil current to the coil. The second circuit is configured to supply an element current to the magnetic element. The third circuit is configured to detect an electrical resistance of the magnetic element. The controller is configured to control the element current by controlling the second circuit based on the electrical resistance detected by the third circuit.

3. 发明授权

US11437059B2 Magnetic head and magnetic recording device with stacked body material configurations 有权
公开(公告)号：US11437059B2
公开(公告)日：2022-09-06
申请号：US17015373
申请日：2020-09-09
申请人： KABUSHIKI KAISHA TOSHIBA , TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
发明人： Hitoshi Iwasaki , Masayuki Takagishi , Naoyuki Narita , Tazumi Nagasawa , Hirofumi Suto
IPC分类号： G11B5/235 , G11B5/31 , G11B5/127 , G11B5/00 , G11B5/245
摘要： According to one embodiment, a magnetic recording device includes a magnetic head, and an electrical circuit. The magnetic head includes a first magnetic pole, a second magnetic pole, and a stacked body provided between the first and the second magnetic poles. The stacked body includes a first nonmagnetic layer, a first magnetic layer provided between the first nonmagnetic layer and the second magnetic pole, a first layer provided between the first magnetic layer and the second magnetic pole, a second nonmagnetic layer provided between the first layer and the second magnetic pole, a second magnetic layer provided between the second nonmagnetic layer and the second magnetic pole, and a third nonmagnetic layer provided between the second magnetic layer and the second magnetic pole. The electrical circuit supplies, to the stacked body, a first current having a first orientation from the second magnetic pole toward the first magnetic pole.

4. 发明授权

US11432751B2 Magnetic sensor and inspection device 有权
公开(公告)号：US11432751B2
公开(公告)日：2022-09-06
申请号：US17399345
申请日：2021-08-11
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Satoshi Shirotori , Hitoshi Iwasaki , Akira Kikitsu , Yoshihiro Higashi , Yoshinari Kurosaki
IPC分类号： G01R5/00 , A61B5/245 , G01R33/00
摘要： According to one embodiment, a magnetic sensor includes a first magnetic element, a second magnetic element, a third magnetic element located between the first and second magnetic elements in a first direction, a fourth magnetic element located between the third and second magnetic elements in the first direction, a first conductive member, a second conductive member, a third conductive member located between the first and second conductive members in the first direction, a fourth conductive member located between the third and second conductive members in the first direction, a first magnetic member, a second magnetic member, a third magnetic member located between the first and second magnetic members in the first direction, a fourth magnetic member located between the third and second magnetic members in the first direction, and a fifth magnetic member located between the third and fourth magnetic members in the first direction.

5. 发明授权

US11350840B2 Magnetic sensor, biological cell sensing device, and diagnostic device 有权
公开(公告)号：US11350840B2
公开(公告)日：2022-06-07
申请号：US17082333
申请日：2020-10-28
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Hitoshi Iwasaki , Akira Kikitsu , Satoshi Shirotori
IPC分类号： G01N27/72 , A61B5/05 , G01N33/483 , A61B5/24 , A61B5/245 , A61K49/00 , H01S4/00
摘要： According to one embodiment, a magnetic sensor includes a first sensor element and a first interconnect. The first sensor element includes a first magnetic layer, a first opposing magnetic layer, and a first nonmagnetic layer provided between the first magnetic layer and the first opposing magnetic layer. A first magnetization of the first magnetic layer is aligned with a first length direction crossing a first stacking direction from the first magnetic layer toward the first opposing magnetic layer. At least a portion of the first interconnect extends along the first length direction. The first interconnect cross direction crosses the first length direction and is from the first sensor element toward the portion of the first interconnect. A first electrical resistance of the first sensor element changes according to an alternating current flowing in the first interconnect and a sensed magnetic field applied to the first sensor element.

6. 发明授权

US11119161B2 Magnetic sensor and diagnostic device 有权
公开(公告)号：US11119161B2
公开(公告)日：2021-09-14
申请号：US16816401
申请日：2020-03-12
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Hitoshi Iwasaki , Akira Kikitsu , Yoshihiro Higashi , Satoshi Shirotori
IPC分类号： G01R33/09 , G01R33/00
摘要： 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.

7. 发明授权

US09886971B2 Magnetic recording and reproducing device with stacked body configuration 有权
公开(公告)号：US09886971B2
公开(公告)日：2018-02-06
申请号：US15254236
申请日：2016-09-01
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Kenichiro Yamada , Shuichi Murakami , Naoyuki Narita , Katsuhiko Koui , Akihiko Takeo , Mariko Shimizu , Hitoshi Iwasaki
IPC分类号： G11B5/235 , G11B5/31 , G11B5/17 , G11B5/127 , G11B5/00
CPC分类号： G11B5/1278 , G11B5/17 , G11B5/235 , G11B5/3133 , G11B5/314 , G11B5/3143 , G11B5/3146 , G11B2005/0024
摘要： 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.

8. 发明授权

US09589581B2 Microwave-assisted magnetic recording head and magnetic recording apparatus including the same 有权
标题翻译：微波辅助磁记录头和包括其的磁记录装置
公开(公告)号：US09589581B2
公开(公告)日：2017-03-07
申请号：US14971482
申请日：2015-12-16
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Masayuki Takagishi , Hitoshi Iwasaki , Kenichiro Yamada
IPC分类号： G11B5/00 , G11B5/09 , G11B5/31
CPC分类号： G11B5/00 , G11B5/09 , G11B5/314 , G11B2005/0024
摘要： A microwave-assisted magnetic recording head according to an embodiment includes: a magnetic pole; a magnetic shield including a first portion and a second portion connecting to the first portion, a gap being present between the first portion and the magnetic pole; a recording coil disposed to at least one of the magnetic pole and the magnetic shield; and a spin torque oscillator including a nonmagnetic intermediate layer extending within and outside the gap, an oscillation layer disposed on a portion of the nonmagnetic intermediate layer in the gap, and a spin injection layer in which a magnetization direction is pinned and which is disposed on a portion of the nonmagnetic intermediate layer outside the gap so as to be separated from the oscillation layer.
摘要翻译：根据实施例的微波辅助磁记录头包括：磁极; 磁屏蔽，包括第一部分和连接到第一部分的第二部分，在第一部分和磁极之间存在间隙; 设置在所述磁极和所述磁屏蔽中的至少一个上的记录线圈; 以及旋转扭矩振荡器，其包括在所述间隙内部和外部延伸的非磁性中间层，设置在所述间隙中的所述非磁性中间层的一部分上的振荡层，以及其中磁化方向被钉扎并设置在其上的自旋注入层在间隙之外的非磁性中间层的一部分与振荡层分离。

9. 发明授权

US09196268B2 Magnetic head manufacturing method forming sensor side wall film by over-etching magnetic shield 有权
标题翻译：磁头制造方法通过过蚀刻磁屏蔽形成传感器侧壁膜
公开(公告)号：US09196268B2
公开(公告)日：2015-11-24
申请号：US14549428
申请日：2014-11-20
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Hitoshi Iwasaki , Masayuki Takagishi
IPC分类号： G11B5/39 , G11B5/11 , G01R33/09
CPC分类号： G11B5/112 , G01R33/093 , G11B5/11 , G11B5/3912 , G11B5/3932 , G11B2005/3996 , Y10T29/49052
摘要： According to one embodiment, a magnetic head includes a reproducing unit to detect a medium magnetic field recorded in a magnetic recording medium. The reproducing unit includes first and second magnetic shields, a stacked body, and a side wall film. The stacked body is provided between the first and second magnetic shields and includes first and second magnetic layer and an intermediate layer provided between them. The stacked body has a side wall. The side wall intersects a plane perpendicular to a stacking direction from the first magnetic shield toward the second magnetic shield. The side wall film covers at least a part of the side wall of the stacked body. The side wall film includes at least one of Fe and Co, and has a composition different from a composition of the first magnetic layer and different from a composition of the second magnetic layer.
摘要翻译：根据一个实施例，磁头包括用于检测记录在磁记录介质中的介质磁场的再现单元。再现单元包括第一和第二磁屏蔽，堆叠体和侧壁膜。层叠体设置在第一和第二磁屏蔽之间，并且包括第一和第二磁性层以及设置在它们之间的中间层。堆叠体具有侧壁。侧壁与从第一磁屏蔽朝向第二磁屏蔽的垂直于堆叠方向的平面相交。侧壁膜覆盖层叠体的侧壁的至少一部分。侧壁膜包括Fe和Co中的至少一种，并且具有不同于第一磁性层的组成并且不同于第二磁性层的组成的组成。

10. 发明授权

US09147411B2 Magnetic recording and reproducing device 有权
标题翻译：磁记录和再现装置
公开(公告)号：US09147411B2
公开(公告)日：2015-09-29
申请号：US14627003
申请日：2015-02-20
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Masayuki Takagishi , Hitoshi Iwasaki , Kenichiro Yamada , Yousuke Isowaki , Kohsuke Harada
IPC分类号： G11B5/39 , G11B5/11
CPC分类号： G11B5/3912 , G11B5/11 , G11B5/3909 , G11B2005/3996
摘要： According to one embodiment, a magnetic recording and reproducing device includes magnetic recording medium and a magnetic head. The magnetic recording medium includes a first surface. A plurality of bits is provided in the first surface. Each of the bits has a direction of magnetization corresponding to recorded information. The magnetic head includes a reproducing unit. The reproducing unit senses the direction of magnetization. The reproducing unit includes a first shield, a second shield, a first magnetic layer, a second magnetic layer, a third magnetic layer, a fourth magnetic layer, an intermediate layer, a first nonmagnetic layer, and a second nonmagnetic layer. The first and the second nonmagnetic layers include at least one selected from ruthenium, copper, and tantalum. A distance between the first shield and the second shield is not less than 3 times and not more than 7 times a length of each of the bits.
摘要翻译：根据一个实施例，磁记录和再现装置包括磁记录介质和磁头。磁记录介质包括第一表面。在第一表面中提供多个位。每个位具有对应于记录信息的磁化方向。磁头包括再现单元。再现单元感测磁化方向。再现单元包括第一屏蔽，第二屏蔽，第一磁性层，第二磁性层，第三磁性层，第四磁性层，中间层，第一非磁性层和第二非磁性层。第一和第二非磁性层包括选自钌，铜和钽中的至少一种。第一屏蔽和第二屏蔽之间的距离不小于每个位的长度的3倍且不超过7倍。

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