公开(公告)号：US5958611A

公开(公告)日：1999-09-28

申请号：US873739

申请日：1997-06-12

申请人： Manabu Ohta ,  Kiyoshi Noguchi ,  Masashi Sano ,  Satoru Araki ,  Taro Oike

发明人： Manabu Ohta ,  Kiyoshi Noguchi ,  Masashi Sano ,  Satoru Araki ,  Taro Oike

IPC分类号： G11B5/31 ,  G11B5/39 ,  H01F10/08 ,  H01F10/32 ,  H01L43/08 ,  H01L43/10 ,  G11B5/66

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  H01F10/3268 ,  H01L43/10 ,  G11B2005/3996 ,  G11B5/3163 ,  Y10S428/90 ,  Y10T428/1107 ,  Y10T428/1121 ,  Y10T428/24355

摘要： According to the present invention, a magnetic multilayered film includes an oxide antiferromagnetic layer, a pinned ferromagnetic layer which is pinned by the oxide antiferromagnetic layer, a non-magnetic metal layer and a free ferromagnetic layer which are stacked on a substrate in order. A surface roughness Ra of the oxide antiferromagnetic layer at the side of the pinned ferromagnetic layer is set to no greater than 0.6 nm, and a crystal grain size D of the oxide antiferromagnetic layer is set to a value in the range of 10 to 40 nm. Thus, the magnetic multilayered film has the large exchange-coupling magnetic field and MR ratio and MR sensitivity. The magnetic multilayered film may be applied to a magnetoresistance effect element which may also applied to a magnetoresistance device, such as, a magnetoresistance effect type head. The magnetoresistance effect element having such a magnetic multilayered film is capable of obtaining high outputs. The magnetoresistance effect type head having such a magnetoresistance effect element which is excellent in current efficiency and capable of detecting signals magnetically recorded in high density, particularly in ultrahigh density exceeding 3 Gbit/inch.sup.2 and further obtaining large outputs.

摘要翻译： 根据本发明，磁性多层膜包括氧化物反铁磁性层，由氧化物反铁磁层固定的钉扎铁磁性层，依次层叠在基板上的非磁性金属层和自由铁磁性层。 在被钉扎的铁磁层一侧的氧化物反铁磁性层的表面粗糙度Ra被设定为不大于0.6nm，并且氧化物反铁磁性层的晶粒尺寸D设定在10至40nm的范围内的值 。 因此，磁性多层膜具有大的交换耦合磁场和MR比和MR灵敏度。 可以将磁性多层膜施加到也可以施加到诸如磁阻效应型头的磁阻器件的磁阻效应元件。 具有这种磁性多层膜的磁阻效应元件能够获得高输出。 具有这样的磁阻效应元件的磁电阻效应型头具有优异的电流效率，能够检测高密度地磁记录的信号，特别是超过3Gbit / inch2的超高密度，并进一步获得大的输出。

公开(公告)号：US5862022A

公开(公告)日：1999-01-19

申请号：US933347

申请日：1997-09-19

申请人： Kiyoshi Noguchi ,  Taro Oike ,  Satoru Araki ,  Manabu Ohta ,  Masashi Sano

发明人： Kiyoshi Noguchi ,  Taro Oike ,  Satoru Araki ,  Manabu Ohta ,  Masashi Sano

IPC分类号： G11B5/39 ,  H01L43/08 ,  G11C11/00 ,  H01L41/12

CPC分类号： G11B5/3967 ,  H01L43/08

摘要： This invention is directed to a ferromagnetic tunnel junction, an MR element and a magnetic head. A ferromagnetic tunnel junction is constituted by sequentially laminating a first ferromagnetic film, an insulating film and a second ferromagnetic film. These are laminated on an appropriate insulating substrate. The present invention is characterized in that the barrier potential of the insulating film is set within a range of 0.5 to 3 eV. A ferromagnetic tunnel junction with which a high MR ratio can be achieved with good reproduction characteristics is provided.

摘要翻译： 本发明涉及铁磁隧道结，MR元件和磁头。 铁磁隧道结由顺序层叠第一铁磁膜，绝缘膜和第二铁磁膜构成。 这些层压在适当的绝缘基板上。 本发明的特征在于，绝缘膜的阻挡电位设定在0.5〜3eV的范围内。 提供了具有良好再生特性可实现高MR比的铁磁隧道结。

公开(公告)号：US08144427B2

公开(公告)日：2012-03-27

申请号：US12274470

申请日：2008-11-20

申请人： Yosuke Antoku ,  Takeo Kagami ,  Katsuki Kurihara ,  Taro Oike ,  Masashi Sano

发明人： Yosuke Antoku ,  Takeo Kagami ,  Katsuki Kurihara ,  Taro Oike ,  Masashi Sano

IPC分类号： G11B5/10 ,  G11B5/56

CPC分类号： G11B5/314 ,  G11B5/6064 ,  G11B5/607 ,  G11B5/6076 ,  G11B2005/0005

摘要： The present invention relates to a magnetic head, a head assembly, and a magnetic recording/reproducing apparatus which are capable of effectively detecting thermal asperity. The magnetic head according to the present invention includes a heat-generating resistor, a recording coil, and a resistive element. The heat-generating resistor is adapted to generate heat when power is fed thereto so that the heat generation causes at least a part of the air bearing surface to thermally expand and protrude. The recording coil is adapted to generate a recording magnetic field, and the resistive element is disposed closer to the air bearing surface than the recording coil and connected in series or in parallel with the heater. Thus, the resistive element can share a common wiring with the heater for power feeding, which eliminates the waste of wiring and achieves miniaturization.

摘要翻译： 本发明涉及能够有效地检测热凹凸的磁头，磁头组件和磁记录/重放装置。 根据本发明的磁头包括发热电阻器，记录线圈和电阻元件。 发热电阻适用于在供电时产生热量，使得发热导致空气轴承表面的至少一部分热膨胀和突出。 记录线圈适于产生记录磁场，并且电阻元件设置为比记录线圈更靠近空气轴承表面并与加热器串联或并联连接。 因此，电阻元件可以与用于供电的加热器共用公共布线，这消除了布线的浪费并实现了小型化。

公开(公告)号：US20100123966A1

公开(公告)日：2010-05-20

申请号：US12274470

申请日：2008-11-20

申请人： Yosuke ANTOKU ,  Takeo Kagami ,  Katsuki Kurihara ,  Taro Oike ,  Masashi Sano

发明人： Yosuke ANTOKU ,  Takeo Kagami ,  Katsuki Kurihara ,  Taro Oike ,  Masashi Sano

IPC分类号： G11B5/02

CPC分类号： G11B5/314 ,  G11B5/6064 ,  G11B5/607 ,  G11B5/6076 ,  G11B2005/0005

摘要： The present invention relates to a magnetic head, a head assembly, and a magnetic recording/reproducing apparatus which are capable of effectively detecting thermal asperity. The magnetic head according to the present invention includes a heat-generating resistor, a recording coil, and a resistive element. The heat-generating resistor is adapted to generate heat when power is fed thereto so that the heat generation causes at least a part of the air bearing surface to thermally expand and protrude. The recording coil is adapted to generate a recording magnetic field, and the resistive element is disposed closer to the air bearing surface than the recording coil and connected in series or in parallel with the heater. Thus, the resistive element can share a common wiring with the heater for power feeding, which eliminates the waste of wiring and achieves miniaturization.

摘要翻译： 本发明涉及能够有效地检测热凹凸的磁头，磁头组件和磁记录/重放装置。 根据本发明的磁头包括发热电阻器，记录线圈和电阻元件。 发热电阻适用于在供电时产生热量，使得发热导致空气轴承表面的至少一部分热膨胀和突出。 记录线圈适于产生记录磁场，并且电阻元件设置为比记录线圈更靠近空气轴承表面并与加热器串联或并联连接。 因此，电阻元件可以与用于供电的加热器共用公共布线，这消除了布线的浪费并实现了小型化。

公开(公告)号：US06920022B1

公开(公告)日：2005-07-19

申请号：US09769760

申请日：2001-01-26

申请人： Yoshihiro Tsuchiya ,  Satoru Araki ,  Masashi Sano ,  Takumi Uesugi

发明人： Yoshihiro Tsuchiya ,  Satoru Araki ,  Masashi Sano ,  Takumi Uesugi

IPC分类号： G11B5/31 ,  G11B5/127 ,  G11B5/21 ,  G11B5/39 ,  H01F10/00 ,  H01F10/08 ,  H01F10/30 ,  H01F10/32 ,  H01F41/18 ,  H01L43/08 ,  H01L43/12

CPC分类号： B82Y25/00 ,  G11B5/1276 ,  G11B5/21 ,  H01F10/3268

摘要： Provided are a magnetic transducer having good thermal stability, a thin film magnetic head, a method of manufacturing a magnetic transducer and a method of manufacturing a thin film magnetic head. A stack of an MR element has a stacked structure comprising an underlayer, a first soft magnetic layer, a second soft magnetic layer, a nonmagnetic layer, a ferromagnetic layer, an antiferromagnetic layer and a capping layer, which are stacked in this order on the underlayer. The ferromagnetic layer is divided into a bottom layer and a top layer in the direction of stack. A ferromagnetic interlayer having magnetism and having higher electrical resistance than the electrical resistance of the ferromagnetic layer is formed between the bottom layer and the top layer. The ferromagnetic interlayer magnetically integrates the bottom layer with the top layer and limits a path for electrons moving through the stack, thereby improving the rate of resistance change. Furthermore, the ferromagnetic interlayer contains, as an additive, at least one element in a group consisting of Mn, Cr, Ni, Cu, Rh, Ir and Pt and thus prevents heat deterioration in the stack.

摘要翻译： 提供具有良好热稳定性的磁换能器，薄膜磁头，制造磁换能器的方法和制造薄膜磁头的方法。 MR元件的堆叠具有堆叠结构，其包括下层，第一软磁层，第二软磁层，非磁性层，铁磁层，反铁磁层和覆盖层， 底层 铁磁层沿堆叠方向分为底层和顶层。 在底层和顶层之间形成具有磁性并且具有比铁磁层的电阻更高的电阻的铁磁中间层。 铁磁层将磁极层与顶层磁集成，限制电子移动通过堆叠的路径，从而提高电阻变化率。 此外，铁磁性中间层含有由Mn，Cr，Ni，Cu，Rh，Ir和Pt组成的组中的至少一种元素作为添加剂，从而防止堆叠中的热劣化。

公开(公告)号：US06646834B2

公开(公告)日：2003-11-11

申请号：US09904842

申请日：2001-07-16

申请人： Masashi Sano ,  Satoru Araki ,  Yoshihiro Tsuchiya ,  Takumi Uesugi

发明人： Masashi Sano ,  Satoru Araki ,  Yoshihiro Tsuchiya ,  Takumi Uesugi

IPC分类号： G11B539

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/3163 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3967 ,  G11B2005/3996 ,  H01F10/324 ,  H01F10/3268 ,  Y10T29/49044

摘要： Provided are a magnetic transducer and a thin film magnetic head having good thermal stability and capable of obtaining a high exchange coupling magnetic field, a method of manufacturing a magnetic transducer and a method of a manufacturing a thin film magnetic head. An MR element has a stack having a stacked structure comprising an underlayer, a crystal-growth inhibitor layer, a first soft magnetic layer, a second soft magnetic layer, a nonmagnetic layer, a ferromagnetic layer, an antiferromagnetic layer and a cap layer, which are stacked in sequence. The ferromagnetic layer has an inner ferromagnetic layer, a coupling layer and an outer ferromagnetic layer, which are stacked in this order on the nonmagnetic layer. The crystal-growth inhibitor layer inhibits crystal growth of the layers formed on the crystal-growth inhibitor layer, thereby limiting an average in-surface particle diameter of the inner ferromagnetic layer to within the range of from 3 nm to 8 nm inclusive, so that an interface between the coupling layer and the inner ferromagnetic layer becomes flattened.

公开(公告)号：US06661623B1

公开(公告)日：2003-12-09

申请号：US09425967

申请日：1999-10-25

申请人： Yoshihiro Tsuchiya ,  Satoru Araki ,  Masashi Sano

发明人： Yoshihiro Tsuchiya ,  Satoru Araki ,  Masashi Sano

IPC分类号： G11B539

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/313 ,  G11B5/3903 ,  G11B2005/3996

摘要： Provided are a magnetic transducer capable of increasing a resistance change and obtaining an appropriate coercive force, a thin film magnetic head, a method of manufacturing a magnetic transducer and a method of manufacturing a thin film magnetic head. A stack, a spin valve film has a stacked structure comprising a first soft magnetic layer, a second soft magnetic layer, a nonmagnetic metal layer, a ferromagnetic layer, an antiferromagnetic layer and a protective layer which are stacked in sequence on an underlying layer. Electrical resistance is changed in accordance with a relative angle between the orientation of magnetization of the ferromagnetic layer and the orientation of magnetization of the first and second soft magnetic layers. A soft magnetic interlayer having magnetism and the electrical resistance higher than the electrical resistance of the first soft magnetic layer is formed in the first soft magnetic layer. When a current flows through the stack, electrons are reflected by the surface of the soft magnetic interlayer and thus a path for the electrons is narrowed. Therefore, a rate of resistance change is increased.

摘要翻译： 提供能够增加电阻变化并获得适当矫顽力的磁换能器，薄膜磁头，制造磁换能器的方法和制造薄膜磁头的方法。 叠层，自旋阀膜具有堆叠结构，其包括依次堆叠在下层上的第一软磁层，第二软磁层，非磁性金属层，铁磁层，反铁磁层和保护层。 电阻根据铁磁层的磁化取向与第一和第二软磁层的磁化方向之间的相对角度而改变。 在第一软磁性层中形成具有磁性的软磁性中间层和比第一软磁性层的电阻高的电阻。 当电流流过堆叠时，电子被软磁中间层的表面反射，因此电子的路径变窄。 因此，电阻变化率增加。

公开(公告)号：US06391431B1

公开(公告)日：2002-05-21

申请号：US09325394

申请日：1999-06-04

申请人： Masashi Sano ,  Yoshihiro Tsuchiya ,  Satoru Araki ,  Haruyuki Morita

发明人： Masashi Sano ,  Yoshihiro Tsuchiya ,  Satoru Araki ,  Haruyuki Morita

IPC分类号： G11B539

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  H01F10/123 ,  H01F10/3268 ,  Y10T428/1143 ,  Y10T428/1157 ,  Y10T428/12861 ,  Y10T428/12944 ,  Y10T428/24975

摘要： A spin valve type magnetoresistance effect film comprises a multilayered film including a non-magnetic metal layer, a ferromagnetic layer formed on one surface of the non-magnetic metal layer, a soft magnetic layer formed on the other surface of the non-magnetic metal layer, an antiferromagnetic layer which is formed on a surface of the ferromagnetic layer remote from the other surface thereof abutting the non-magnetic metal layer so as to pin a direction of magnetization of the ferromagnetic layer, and an antiferromagnetization promote layer formed on a surface of the antiferromagnetic layer remote from the other surface thereof abutting the ferromagnetic layer, wherein the antiferromagnetic layer is made of a compound containing Mn and having a CuAu-I type regular crystal structure the which requires a heat treatment for generating exchange coupling relative to the ferromagnetic layer, and the antiferromagnetic layer after the heat treatment has a state wherein (110) crystal surfaces are oriented on a film surface of the antiferromagnetic layer.

摘要翻译： 自旋阀型磁阻效应膜包括：包含非磁性金属层的多层膜，在非磁性金属层的一个表面上形成的铁磁层，形成在非磁性金属层的另一个表面上的软磁性层 形成在铁磁层的远离其另一表面的表面上的反铁磁性层，其与非磁性金属层邻接以引导铁磁层的磁化方向，以及形成在铁磁层的表面上的反铁磁化促进层 反铁磁层远离其另一表面邻接铁磁层，其中反铁磁层由含Mn的化合物制成并具有CuAu-I型规则晶体结构，其需要进行热处理以产生相对于铁磁层的交换耦合 ，热处理后的反铁磁层具有（110）晶面的状态 在反铁磁层的膜表面上取向。

公开(公告)号：US06195239B1

公开(公告)日：2001-02-27

申请号：US09260727

申请日：1999-03-02

申请人： Satoru Araki ,  Masashi Sano ,  Yoshihiro Tsuchiya

发明人： Satoru Araki ,  Masashi Sano ,  Yoshihiro Tsuchiya

IPC分类号： G11B533

CPC分类号： G11B5/3967

摘要： In a spin valve type magnetoresistance effect film, an antiferromagnetic layer is made of MxMn100−x wherein M represents at least one selected from Ru, Rh, Re, Pt, Pd, Au, Ag, Fe, Ni, Ir and Cr, and 15≦x≦58 (unit of x: atomic %), and a protective layer formed thereon is made of at least one selected from Rh, Ru, Zr and Ti. With this arrangement, a magnetoresistance effect film highly excellent in thermal stability and small in deterioration of the MR ratio, as well as a magnetoresistance effect type head having such a magnetoresistance effect film can be obtained.

摘要翻译： 在自旋阀型磁阻效应膜中，反铁磁层由MxMn100-x制成，其中M表示选自Ru，Rh，Re，Pt，Pd，Au，Ag，Fe，Ni，Ir和Cr中的至少一种， <= x <= 58（x：原子％），其上形成的保护层由选自Rh，Ru，Zr和Ti中的至少一种制成。 通过这种布置，可以获得热稳定性优异且MR比率劣化小的磁阻效应膜以及具有这种磁阻效应膜的磁阻效应型头。

公开(公告)号：US07145756B2

公开(公告)日：2006-12-05

申请号：US10645901

申请日：2003-08-22

申请人： Yoshihiro Tsuchiya ,  Satoru Araki ,  Masashi Sano

发明人： Yoshihiro Tsuchiya ,  Satoru Araki ,  Masashi Sano

IPC分类号： G11B5/39

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/313 ,  G11B5/3903 ,  G11B2005/3996

摘要： Provided are a magnetic transducer capable of increasing a resistance change and obtaining an appropriate coercive force, a thin film magnetic head, a method of manufacturing a magnetic transducer and a method of manufacturing a thin film magnetic head.A stack, a spin valve film has a stacked structure comprising a first soft magnetic layer, a second soft magnetic layer, a nonmagnetic metal layer, a ferromagnetic layer, an antiferromagnetic layer and a protective layer which are stacked in sequence on an underlying layer. Electrical resistance is changed in accordance with a relative angle between the orientation of magnetization of the ferromagnetic layer and the orientation of magnetization of the first and second soft magnetic layers. A soft magnetic interlayer having magnetism and the electrical resistance higher than the electrical resistance of the first soft magnetic layer is formed in the first soft magnetic layer. When a current flows through the stack, electrons are reflected by the surface of the soft magnetic interlayer and thus a path for the electrons is narrowed. Therefore, a rate of resistance change is increased.

摘要翻译： 提供能够增加电阻变化并获得适当矫顽力的磁换能器，薄膜磁头，制造磁换能器的方法和制造薄膜磁头的方法。 叠层，自旋阀膜具有堆叠结构，其包括依次层叠在下层上的第一软磁层，第二软磁层，非磁性金属层，铁磁层，反铁磁层和保护层。 电阻根据铁磁层的磁化取向与第一和第二软磁层的磁化方向之间的相对角度而改变。 在第一软磁性层中形成具有磁性的软磁性中间层和比第一软磁性层的电阻高的电阻。 当电流流过堆叠时，电子被软磁中间层的表面反射，因此电子的路径变窄。 因此，电阻变化率增加。