公开(公告)号：US20100214692A1

公开(公告)日：2010-08-26

申请号：US12389652

申请日：2009-02-20

申请人： Mark Thomas Kief ,  Sharat Batra ,  Venkateswara Rao Inturi

发明人： Mark Thomas Kief ,  Sharat Batra ,  Venkateswara Rao Inturi

IPC分类号： G11B5/33

CPC分类号： G11B5/3156 ,  G11B5/1278

摘要： The present disclosure provides a magnetic recording head for a data storage system having improved write field characteristics. In one example, an apparatus having magnetic properties is provided. The apparatus includes a pole, a shield, and a multilayer block positioned between the pole and the shield. The multilayer block includes a plurality of layers wherein at least one of the plurality of layers comprises a magnetic material. In one embodiment, the multilayer block provides an antiferromagnetic coupling between the pole and the shield such that a magnetization of the pole is in a first direction and a magnetization of the shield in a second direction that is substantially anti-parallel to the first direction.

摘要翻译： 本公开提供了一种具有改进的写场特性的数据存储系统的磁记录头。 在一个示例中，提供了具有磁性的装置。 该装置包括极，屏蔽和位于极与屏蔽之间的多层块。 多层块包括多个层，其中多个层中的至少一个层包括磁性材料。 在一个实施例中，多层块在极和屏蔽之间提供反铁磁耦合，使得极的磁化处于第一方向，并且屏蔽在第二方向上的磁化基本上与第一方向平行。

公开(公告)号：US07554765B2

公开(公告)日：2009-06-30

申请号：US10459098

申请日：2003-06-11

申请人： Alexander M. Shukh ,  Nurul Amin

发明人： Alexander M. Shukh ,  Nurul Amin

IPC分类号： G11B5/147

CPC分类号： G11B5/1278 ,  G11B5/3113 ,  G11B5/3156 ,  G11B5/3967

摘要： A magnetic head for perpendicular recording having reduced side writing and erasing is disclosed. The writer portion of the magnetic head includes a main pole and a return pole. The main pole includes a multilayer main pole tip and a multilayer yoke. The layers of the main pole tip and the yoke are antiferromagnetically coupled to each other with a non-magnetic metal. Antiferromagnetic coupling between the layers of the main pole tip and the yoke dramatically reduces fringing flux emanated from the sides of the main pole intending to close through an upper portion of the return pole. A biasing antiferromagnetic layer is coupled to the upper portion of the return pole to bias the return pole parallel to the air bearing surface. This prevents or reduces the effect of domain wall formation in the return pole, which results in further reduction in side writing and erasing.

摘要翻译： 公开了一种用于垂直记录的磁头，其具有减小的侧面写入和擦除。 磁头的写入器部分包括主极和返回极。 主极包括多层主极尖和多层轭。 主极尖和轭的层用非磁性金属反铁磁耦合。 主极尖和磁轭的层之间的反铁磁耦合显着地减少了从主极的侧面发出的边缘通量，其旨在靠近返回极的上部。 偏置反铁磁层耦合到返回极的上部，以将返回极平行于空气轴承表面偏置。 这样可以防止或减少返回极中的畴壁形成的影响，从而进一步减少了侧面写入和擦除。

公开(公告)号：US20040027715A1

公开(公告)日：2004-02-12

申请号：US10218011

申请日：2002-08-12

申请人： INTERNATIONAL BUSINESS MACHINES

发明人： April Dawn Hixson-Goldsmith ,  Matthew Walter Last ,  Murali Ramasubramanian ,  Rolf Schaefer

IPC分类号： G11B005/127 ,  C25D005/02

CPC分类号： G11B5/313 ,  C25D5/14 ,  C25D5/18 ,  G11B5/3156 ,  G11B5/3163 ,  G11B5/3967

摘要： A method for multi-layer electrodeposition in a single bath is also provided. A substrate is immersed in a bath. An electrodeposition operation is initiated for depositing a first layer of material on the substrate. The electrodeposition operation includes agitating the bath and applying current pulses. The electrodeposition operation is later altered for depositing a second layer of material on the first layer, where the second layer is of a different composition than the first layer. In the altered mode, the current density is changed for altering a composition of material deposited on the substrate, the duration and/or frequency of the current pulses are altered, and the bath is agitated at a different rate of agitation.

摘要翻译： 还提供了在单个浴中进行多层电沉积的方法。 将衬底浸入浴中。 开始电沉积操作以在衬底上沉积第一层材料。 电沉积操作包括搅拌浴并施加电流脉冲。 随后改变电沉积操作以在第一层上沉积第二层材料，其中第二层具有不同于第一层的组成。 在改变的模式中，改变电流密度以改变沉积在衬底上的材料的组成，改变电流脉冲的持续时间和/或频率，并以不同的搅拌速率搅拌浴。

公开(公告)号：US06636391B2

公开(公告)日：2003-10-21

申请号：US09811482

申请日：2001-03-20

申请人： Katsuro Watanabe ,  Yoshiaki Kawato ,  Reiko Arai

发明人： Katsuro Watanabe ,  Yoshiaki Kawato ,  Reiko Arai

IPC分类号： G11B5127

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/012 ,  G11B5/3156 ,  G11B5/3903 ,  G11B5/3919 ,  G11B2005/3996 ,  H01F10/3268

摘要： A magnetoresistive sensor employing a magnetoresistive sensor film of a GMR film or a TMR film and a magnetic flux guide to ensure high sensitivity and high stability. Magnetization of a magnetic flux guide and a first ferromagnetic layer, which is a free layer of a GMR sensor film or a TMR sensor film, are made to antiferromagnetically couple to each other via a nonmagnetic intermediate layer 21. Since net magnetic moment has become small in the area in which the magnetoresistive sensor film is arranged, and an angle of magnetization of the ferromagnetic layer rotated by magnetic field which has been guided by the magnetic flux guide enlarges, high sensitivity can be obtained. When a longitudinal biasing layer is provide for the magnetic flux guide, longitudinal biasing magnetic field is applied to the ferromagnetic layer as well which is antiferromagnetically coupled to the magnetic flux guide, thus being able to suppress Barkhausen noise of both the magnetic flux guide and the ferromagnetic layer.

摘要翻译： 采用GMR膜或TMR膜的磁阻传感器膜和磁通量的磁阻传感器，以确保高灵敏度和高稳定性。 通过磁性引导件和作为GMR传感器膜或TMR传感器膜的自由层的第一铁磁层的磁化被制造成通过非磁性中间层21彼此反铁磁耦合。由于净磁矩变小 在其中布置磁阻传感器膜的区域中，由磁通导向器引导的磁场旋转的铁磁层的磁化角度增大，可以获得高灵敏度。 当为磁通引导件提供纵向偏置层时，纵向偏置磁场也被施加到铁磁层，其与铁磁导向件反铁磁耦合，从而能够抑制磁通量和磁通量的Barkhausen噪声 铁磁层。

公开(公告)号：US20020006018A1

公开(公告)日：2002-01-17

申请号：US09964814

申请日：2001-09-28

申请人： Hitachi, Ltd.

发明人： Shun-Ichi Narumi ,  Hiroshi Fukui ,  Moriaki Fuyama ,  Matahiro Komuro

IPC分类号： G11B005/147 ,  G11B005/39

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3109 ,  G11B5/3113 ,  G11B5/3116 ,  G11B5/3156 ,  G11B5/3909 ,  G11B5/3967 ,  G11B2005/3996

摘要： An inductive thin-film magnetic head with small fluctuations of the reproduction output and noises for reproduction is disclosed. The forward end of each of a lower magnetic core and an upper magnetic core has the same width as the track. The rear end of each of the lower magnetic core and the upper magnetic core, on the other hand, is wider than the forward end thereof in the direction transverse of the track. Also, the lower magnetic core is formed of at least two magnetic layers with a non-magnetic layer interposed therebetween.

摘要翻译： 公开了一种具有小的再现输出波动和用于再现的噪声的感应薄膜磁头。 下磁芯和上磁芯各自的前端具有与轨道相同的宽度。 另一方面，下磁芯和上磁芯中的每一个的后端比其轨道横向方向的前端宽。 此外，下磁芯由至少两个介于其间的非磁性层的磁性层形成。

公开(公告)号：US20010040777A1

公开(公告)日：2001-11-15

申请号：US09811482

申请日：2001-03-20

发明人： Katsuro Watanabe ,  Yoshiaki Kawato ,  Reiko Arai

IPC分类号： G11B005/39

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/012 ,  G11B5/3156 ,  G11B5/3903 ,  G11B5/3919 ,  G11B2005/3996 ,  H01F10/3268

摘要： A magnetoresistive sensor employing a magnetoresistive sensor film of a GMR film or a TMR film and a magnetic flux guide to ensure high sensitivity and high stability. Magnetization of a magnetic flux guide 10 and a first ferromagnetic layer 22, which is a free layer of a GMR sensor film or a TMR sensor film, are made to antiferromagnetically couple to each other via a nonmagnetic intermediate layer 21. Since net magnetic moment has become small in the area in which the magnetoresistive sensor film is arranged, and an angle of magnetization of the first ferromagnetic layer 22 rotated by magnetic field which has been guided by the magnetic flux guide 10 enlarges, high sensitivity can be obtained. When a longitudinal biasing layer is provide for the magnetic flux guide 10, longitudinal biasing magnetic field is applied to the first ferromagnetic layer 22 as well which is antiferromagnetically coupled to the magnetic flux guide 10, thus being able to suppress Barkhausen noise of both the magnetic flux guide 10 and the first ferromagnetic layer 22.

摘要翻译： 采用GMR膜或TMR膜的磁阻传感器膜和磁通量的磁阻传感器，以确保高灵敏度和高稳定性。 通过磁性引导件10和作为GMR传感器膜或TMR传感器膜的自由层的第一铁磁层22的磁化被制造成通过非磁性中间层21彼此反铁磁耦合。由于净磁矩具有 在其中设置磁阻传感器膜的区域变小，并且可以获得由磁导引10引导的由磁场旋转的第一铁磁层22的磁化角度的高灵敏度。 当向磁通引导件10提供纵向偏置层时，纵向偏置磁场也被施加到第一铁磁层22，该磁场层反向铁磁地耦合到磁通引导件10，从而能够抑制磁性磁体的Barkhausen噪声 磁通引导件10和第一铁磁层22。

公开(公告)号：US06267824B1

公开(公告)日：2001-07-31

申请号：US09314129

申请日：1999-05-19

申请人： Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

发明人： Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

IPC分类号： C21D104

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3109 ,  G11B5/3113 ,  G11B5/3156 ,  G11B5/39 ,  G11B5/3903 ,  G11B5/3967 ,  G11B2005/3996

摘要： In a magnetoresistive effect composite head, magnetic shields oppose each other on a slider main body made of a ceramic material through a predetermined gap, and a magnetoresistive effect element is sandwiched and stacked between the magnetic shields with a magnetic spacer layer made of an insulator. A recording head portion uses one of the magnetic shields as a first magnetic pole, and has a second magnetic pole formed on a surface of the first magnetic pole opposite to the magnetoresistive effect element through a magnetic gap, to record information on a recording medium by means of a magnetic field generated in the magnetic gap. The magnetoresistive effect element includes a central region made of a spin-valve element to sense a medium field, and end regions for supplying a bias field and a current to the central region. The second magnetic pole is constituted by a stacked film of first and second magnetic films having different saturation magnetizations. The first and second magnetic films are close to and far from the magnetic gap, respectively. The saturation magnetization of the first magnetic film is set to a value larger than that of the second magnetic film. A method of manufacturing the above head is also disclosed.

摘要翻译： 在磁阻效应复合头中，磁屏蔽通过预定间隙在由陶瓷材料制成的滑动器主体上彼此相对，并且磁阻效应元件被夹在磁屏蔽之间并由绝缘体制成的磁隔离层叠置在磁屏蔽之间。 记录头部分使用磁屏蔽之一作为第一磁极，并且具有通过磁隙形成在与磁阻效应元件相对的第一磁极的表面上的第二磁极，以通过磁记录介质将信息记录在记录介质上 在磁隙中产生的磁场的装置。 磁阻效应元件包括由感应中间场的自旋阀元件制成的中心区域和用于向中心区域提供偏置场和电流的端部区域。 第二磁极由具有不同饱和磁化的第一和第二磁性膜的叠层膜构成。 第一和第二磁性膜分别靠近和远离磁隙。 将第一磁性膜的饱和磁化强度设定为大于第二磁性膜的饱和磁化强度。 还公开了制造上述头的方法。

公开(公告)号：US6064552A

公开(公告)日：2000-05-16

申请号：US42696

申请日：1998-03-17

申请人： Hitoshi Iwasaki ,  Yuzo Kamiguchi ,  Masashi Sahashi ,  Hiroaki Yoda

发明人： Hitoshi Iwasaki ,  Yuzo Kamiguchi ,  Masashi Sahashi ,  Hiroaki Yoda

IPC分类号： G11B5/31 ,  G11B5/39 ,  G11B5/40

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3919 ,  G11B5/3925 ,  G11B5/3948 ,  G11B5/3967 ,  G11B5/40 ,  G11B2005/3996 ,  G11B5/3156 ,  G11B5/3183

摘要： A magnetoresistive head comprising, a magnetic yoke defining a magnetic gap for guiding signal magnetic fields from a recording medium at the air-bearing surface, a giant magnetoresistive element magnetically coupled with the magnetic yoke at a position remote from the air-bearing surface, and means for supplying a sense current in a direction substantially perpendicular to the surface of the giant magnetoresistive element.

摘要翻译： 一种磁阻头，包括：限定用于引导来自空气轴承表面的记录介质的信号磁场的磁隙的磁轭;在远离空气轴承表面的位置处与磁轭磁耦合的巨磁阻元件，以及 用于在基本垂直于巨磁阻元件的表面的方向上提供感测电流的装置。

公开(公告)号：US20060203382A1

公开(公告)日：2006-09-14

申请号：US11435053

申请日：2006-05-16

申请人： Kochan Ju ,  Lijie Guan ,  Jeiwei Chang ,  Min Li ,  Ben Hu

发明人： Kochan Ju ,  Lijie Guan ,  Jeiwei Chang ,  Min Li ,  Ben Hu

IPC分类号： G11B5/127

CPC分类号： G11B5/1278 ,  G11B5/187 ,  G11B5/245 ,  G11B5/3156 ,  G11B5/465 ,  Y10T29/49032 ,  Y10T29/49043

摘要： Single write poles tend to large shape anisotropy which results in a very large remnant field when not actually writing. This has now been eliminated by giving the write pole the form of a three layer laminate in which two ferromagnetic layers are separated by a non-magnetic or antiferromagnetic coupling layer. Strong magnetostatic coupling between the outer layers causes their magnetization directions to automatically be antiparallel to one another, unless overcome by the more powerful write field, leaving the structure with a low net magnetic moment. The thickness of the middle layer must be carefully controlled.

摘要翻译： 单写磁极往往具有大的形状各向异性，这在实际写入时导致非常大的残余磁场。 现在已经通过给写磁极制成三层层叠体的形式来消除这种情况，其中两个铁磁层被非磁性或反铁磁性耦合层分开。 外层之间的强静磁耦合使得它们的磁化方向自动地相互反平行，除非由更强大的写入场来克服，使结构具有低的净磁矩。 中间层的厚度必须仔细控制。

公开(公告)号：US07064924B2

公开(公告)日：2006-06-20

申请号：US10610036

申请日：2003-06-30

申请人： Kochan Ju ,  Lijie Guan ,  Jeiwei Chang ,  Min Li ,  Ben Hu

发明人： Kochan Ju ,  Lijie Guan ,  Jeiwei Chang ,  Min Li ,  Ben Hu

IPC分类号： G11B5/147

CPC分类号： G11B5/1278 ,  G11B5/187 ,  G11B5/245 ,  G11B5/3156 ,  G11B5/465 ,  Y10T29/49032 ,  Y10T29/49043

摘要： Single write poles tend to large shape anisotropy which results in a very large remnant field when not actually writing. This has now been eliminated by giving the write pole the form of a three layer laminate in which two ferromagnetic layers are separated by a non-magnetic or antiferromagnetic coupling layer. Strong magnetostatic coupling between the outer layers causes their magnetization directions to automatically be antiparallel to one another, unless overcome by the more powerful write field, leaving the structure with a low net magnetic moment. The thickness of the middle layer must be carefully controlled.