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11.发明授权公开(公告)号：US09129617B2
公开(公告)日：2015-09-08
申请号：US14623047
申请日：2015-02-16
CPC分类号： G11B5/09 , G11B5/1278 , G11B5/3123 , G11B5/3133 , G11B5/35 , G11B20/10222 , G11B2005/001
摘要： An example magnetic recording apparatus includes a magnetic recording medium, a magnetic recording head and a signal processor. The magnetic recording head includes a first magnetic pole; a second magnetic pole; a spin torque oscillator; a first coil to magnetize the first magnetic pole; and a second coil through which a current is passed independently of the first coil. The signal processor writes and reads a signal on the magnetic recording medium by using the magnetic recording head and includes a first current circuit to supply a recording current to the first coil and a second current circuit to supply a modulating current to the second coil.
摘要翻译： 一种示例性磁记录装置包括磁记录介质，磁记录头和信号处理器。 磁记录头包括第一磁极; 第二磁极; 自旋转矩振荡器; 使第一磁极磁化的第一线圈; 以及电流独立于第一线圈通过的第二线圈。 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，并且包括向第一线圈提供记录电流的第一电流电路和向第二线圈提供调制电流的第二电流电路。
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12.发明授权Non-local spin valve element with three terminals, hard disk head, and magnetic recording and reproducing apparatus 有权具有三个端子，硬盘头和磁记录和再现装置的非局部自旋阀元件公开(公告)号：US09117465B2
公开(公告)日：2015-08-25
申请号：US14338481
申请日：2014-07-23
CPC分类号： G11B5/35 , G01R33/093 , G01R33/098 , G01R33/1284 , G11B5/3909 , G11B2005/3996 , H01F10/08 , H01F10/1936 , H01F10/3254
摘要： 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.
摘要翻译： 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：US08842394B2
公开(公告)日：2014-09-23
申请号：US13573675
申请日：2012-10-03
CPC分类号： G11B5/11 , G11B5/3912 , G11B5/3932 , G11B5/398
摘要： According to one embodiment, a magnetic head includes a magnetoresistive element between a first magnetic shield layer and a second magnetic shield layer, and a hard bias layer between the first magnetic shield layer and the second magnetic shield layer on a side surface of the magnetoresistive element in a first direction intersecting with a second direction which links the first and second magnetic shield layers. The hard bias layer includes Fe or an alloy containing Fe and Co. An aspect ratio (h/w) of the hard bias layer is not smaller than 2, where h is a height of the hard bias layer in the first direction and w is a thickness of the hard bias layer in the second direction.
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公开(公告)号：US11705152B2
公开(公告)日：2023-07-18
申请号：US17817818
申请日：2022-08-05
CPC分类号： G11B5/3153 , G11B5/1278
摘要： 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：US11417355B2
公开(公告)日：2022-08-16
申请号：US17177274
申请日：2021-02-17
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.
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公开(公告)号：US11348606B2
公开(公告)日：2022-05-31
申请号：US17171037
申请日：2021-02-09
摘要： 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 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 second and first magnetic layers, a second nonmagnetic layer provided between the third and second magnetic layers, and a third nonmagnetic layer provided between the first magnetic pole and the third magnetic layer. The second magnetic layer includes first and second magnetic regions. The second magnetic region is between the second nonmagnetic layer and the first magnetic region. The first magnetic region includes a first element. The second magnetic region includes the first element, and a second element.
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公开(公告)号：US11004464B1
公开(公告)日：2021-05-11
申请号：US17015281
申请日：2020-09-09
发明人： Hirofumi Suto , Naoyuki Narita , Tazumi Nagasawa , Masayuki Takagishi , Hitoshi Iwasaki , Tomoyuki Maeda
摘要： According to one embodiment, a magnetic head includes first and second shields, a magnetic pole, a first magnetic layer, and a first nonmagnetic member. The first shield includes first, second, and third partial regions. A first direction is from the second toward third partial region. The first partial region is between the second and third partial regions. A second direction from the first toward second shield crosses the first direction. The magnetic pole between the second and third partial regions in the first direction is provided between the first partial region and the second shield in the second direction. The first magnetic layer is provided between the magnetic pole and the second shield. The first nonmagnetic member includes first and second portions. The first portion is between the magnetic pole and the first magnetic layer. The second portion is between the second partial region and the second shield.
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公开(公告)号：US10849527B2
公开(公告)日：2020-12-01
申请号：US15698372
申请日：2017-09-07
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.
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公开(公告)号：US10186284B2
公开(公告)日：2019-01-22
申请号：US15703089
申请日：2017-09-13
摘要： 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.
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公开(公告)号：US20170363606A1
公开(公告)日：2017-12-21
申请号：US15438793
申请日：2017-02-22
发明人： Akira Kikitsu , Hitoshi Iwasaki
CPC分类号： G01N33/4833 , G01N21/6428 , G01N33/5005 , G01N2021/7786 , G01N2201/068 , G01R15/205 , G01R33/093 , G01R33/098 , H01L43/02 , H01L43/08 , H01L43/10 , H01L43/12
摘要： According to one embodiment, a sensor includes a nonmagnetic layer and a plurality of magnetic field sensors. The nonmagnetic layer has a first surface and a second surface. The magnetic field sensors are arranged along the second surface. The second surface is between the first surface and the magnetic field sensors. Each of the magnetic field sensors includes a first magnetic layer, a second magnetic layer provided between the first magnetic layer and the nonmagnetic layer, and an intermediate layer provided between the first magnetic layer and the second magnetic layer. The intermediate layer is nonmagnetic. A distance between the first surface and the second magnetic layer is not more than a pitch of the magnetic field sensors.
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