公开(公告)号：US08520338B2

公开(公告)日：2013-08-27

申请号：US13312413

申请日：2011-12-06

申请人： Yuta Udo ,  Mikito Sugiyama ,  Masato Shiimoto ,  Nobuo Yoshida ,  Kenji Sugiura ,  Masashi Hattori

发明人： Yuta Udo ,  Mikito Sugiyama ,  Masato Shiimoto ,  Nobuo Yoshida ,  Kenji Sugiura ,  Masashi Hattori

IPC分类号： G11B5/127 ,  G11B5/187

CPC分类号： G11B5/3163 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/314 ,  G11B2005/0024

摘要： Minute elements are formed while a photo deviation is suppressed between a spin torque oscillator and a main pole and damage is prevented on the ends of the spin torque oscillator in microwave-assisted recording. A magnetic recording head used for microwave-assisted recording includes: a main pole; a spin torque oscillator that is disposed on the main pole and includes a magnetization high-speed rotation layer for rotating magnetization at a high speed by a spin torque; a protective film that is disposed in the track width direction of the spin torque oscillator; an insulating film formed over the wall surfaces of the main pole and the wall surfaces of the protective film; and a magnetic film formed on the insulating film so as to cover at least the main pole.

摘要翻译： 在微波辅助记录中，在自旋转矩振荡器和主极之间抑制光偏移并且在自旋扭矩振荡器的端部上的损伤被防止时形成分钟元件。 用于微波辅助记录的磁记录头包括：主极; 旋转扭矩振荡器，其设置在所述主极上并且包括用于通过自旋转矩高速旋转磁化的磁化高速旋转层; 保护膜，其设置在所述自旋扭矩振子的轨道宽度方向上; 绝缘膜形成在主极的壁表面和保护膜的壁表面上; 以及形成在所述绝缘膜上以至少覆盖所述主极的磁性膜。

公开(公告)号：US20130050869A1

公开(公告)日：2013-02-28

申请号：US13402949

申请日：2012-02-23

申请人： Keiichi NAGASAKA ,  Masato Shiimoto ,  Yo Sato

发明人： Keiichi NAGASAKA ,  Masato Shiimoto ,  Yo Sato

IPC分类号： G11B5/127 ,  G11B21/02

CPC分类号： G11B5/3146 ,  G11B2005/0024 ,  H01F10/3272 ,  H01F10/3286 ,  H01F10/329 ,  H01L43/08

摘要： In high frequency magnetic assisted recording technique, a spin torque oscillator that stably oscillates at a low current and a magnetic recording head with high recording density are provided. In a magnetic recording head including an oscillator that generates a high frequency magnetic field, a spin injection layer structure of two laminated magnetic layers which are coupled to be anti-parallel is adopted. A product Ms×t of the saturated magnetization Ms and the film thickness t of the first magnetic layer close to a field generation layer is smaller than a product Ms×t of the second magnetic layer remote from the field generation layer.

摘要翻译： 在高频磁辅助记录技术中，提供了以低电流稳定振荡的自旋扭矩振荡器和具有高记录密度的磁记录头。 在包括产生高频磁场的振荡器的磁记录头中，采用耦合为反并联的两个层叠磁性层的自旋注入层结构。 饱和磁化强度Ms的乘积Ms×t和接近场产生层的第一磁性层的膜厚t小于远离场发生层的第二磁性层的乘积Ms×t。

公开(公告)号：US08223464B2

公开(公告)日：2012-07-17

申请号：US12615221

申请日：2009-11-09

申请人： Kan Yasui ,  Masato Shiimoto ,  Takeshi Nakagawa ,  Hiroyuki Katada ,  Nobuo Yoshida ,  Hiroyuki Hoshiya

发明人： Kan Yasui ,  Masato Shiimoto ,  Takeshi Nakagawa ,  Hiroyuki Katada ,  Nobuo Yoshida ,  Hiroyuki Hoshiya

IPC分类号： G11B5/33 ,  G11B5/127

CPC分类号： G11B5/3163 ,  G11B5/398

摘要： In one embodiment, a differential-type magnetic read head includes a differential-type magneto-resistive-effect film formed on a substrate, and a pair of electrodes for applying current in a direction perpendicular to a film plane of the film. The film includes a first and second stacked film, each having a pinned layer, an intermediate layer, and a free layer, with the second stacked film being formed on the first stacked film. A side face in a track width direction of the film is shaped to have an inflection point at an intermediate position in a thickness direction of the film, and the side face is shaped to be approximately vertical to the substrate in an upward direction of the substrate from the inflection point. Also, the side face is shaped to be gradually increased in track width as approaching the substrate in a downward direction of the substrate from the inflection point.

摘要翻译： 在一个实施例中，差分型磁读头包括形成在基板上的差分型磁阻效应膜和用于在垂直于膜的膜平面的方向上施加电流的一对电极。 膜包括第一和第二堆叠膜，每个具有钉扎层，中间层和自由层，第二堆叠膜形成在第一堆叠膜上。 膜的轨道宽度方向的侧面成形为在膜的厚度方向上的中间位置具有拐点，并且侧面成形为在基板的上方大致垂直于基板 从拐点。 此外，侧面被成形为在从拐点向基板向下方向接近基板的轨迹宽度上逐渐增加。

公开(公告)号：US20120113543A1

公开(公告)日：2012-05-10

申请号：US13291580

申请日：2011-11-08

申请人： Masato Shiimoto ,  Mikito Sugiyama

发明人： Masato Shiimoto ,  Mikito Sugiyama

IPC分类号： G11B5/17 ,  G11B21/02

CPC分类号： G11B5/127 ,  G11B5/3116 ,  G11B5/3146 ,  G11B5/315 ,  G11B2005/0024

摘要： A magnetic recording head enabling both enhancement of a strength of a magnetic field from a main pole and provision of narrow-track recording to achieve a high recording density in a high-frequency magnetic field-assisted recording method is provided. An oscillator 110 that generates a high-frequency magnetic field is provided on the trailing side of a main pole 120, and viewed from the air bearing surface side, a ratio Pw/Two between a track width Pw of a trailing-side edge portion of the main pole and a track width Two of a leading-side edge portion of the oscillator is no less than 0.85 and no more than 1.25, and the main pole includes a part having a track width larger than Pw between the trailing-side edge portion and a leading-side edge portion of the main pole.

摘要翻译： 提供一种能够提高来自主极的磁场强度并提供窄轨记录以在高频磁场辅助记录方法中实现高记录密度的磁记录头。 在主极120的后侧设置有产生高频磁场的振荡器110，从空气轴承面侧观察后方侧缘部的轨道宽度Pw与Pw / 主极和轨道宽度振荡器的前侧边缘部分中的两个不小于0.85且不大于1.25，并且主极包括轨道宽度大于后侧边缘部分之间的Pw的部分 和主极的前端侧部分。

公开(公告)号：US20120113542A1

公开(公告)日：2012-05-10

申请号：US13287292

申请日：2011-11-02

申请人： Masukazu Igarashi ,  Yo Sato ,  Masato Shiimoto ,  Keiichi Nagasaka

发明人： Masukazu Igarashi ,  Yo Sato ,  Masato Shiimoto ,  Keiichi Nagasaka

IPC分类号： G11B5/127 ,  G11B21/02

CPC分类号： G11B5/3146 ,  G11B5/3116 ,  G11B5/3133 ,  G11B5/315 ,  G11B2005/0024

摘要： The present invention provides a magnetic recording head and a magnetic recording device that realize information transfer speed exceeding 1 Gbit/s in microwave assisted magnetic recording applied to a magnetic recording device having recording density exceeding 1 Tbit/in2. Concerning a reference layer that supplies spin torque to a high-speed magnetization rotator serving as a microwave field generation source, when an externally applied field to the reference layer is represented as Hext, a magnetic anisotropy field of the reference layer is represented as Hk, and an effective demagnetizing field in a vertical direction of a film surface of the reference layer is represented as Hd-eff, the fixing layer is configured to satisfy conditions Hext−Hk+Hd-eff>0 and Hext+Hk−Hd-eff>0.

摘要翻译： 本发明提供一种在记录密度超过1Tbit / in2的磁记录装置中实现微波辅助磁记录中超过1Gbit / s的信息传送速度的磁记录头和磁记录装置。 关于向作为微波场产生源的高速磁化旋转体提供自旋转矩的参考层，当将参考层的外部施加场表示为Hext时，参考层的磁各向异性场表示为Hk， 将参考层的膜表面的垂直方向上的有效去磁场表示为Hd-eff，固定层被配置为满足条件Hext-Hk + Hd-eff> 0和Hext + Hk-Hd-eff> 0。

公开(公告)号：US20120069465A1

公开(公告)日：2012-03-22

申请号：US13208384

申请日：2011-08-12

申请人： Yo SATO ,  Keiichi NAGASAKA ,  Masato SHIIMOTO ,  Masato MATSUBARA

发明人： Yo SATO ,  Keiichi NAGASAKA ,  Masato SHIIMOTO ,  Masato MATSUBARA

IPC分类号： G11B5/127 ,  G11B5/33 ,  G11B5/596

CPC分类号： G11B5/3133 ,  G11B2005/0024

摘要： The present invention provides a spin torque oscillator that can realize stable oscillation and has high reliability. A laminated structure including a first magnetic layer 1 having a bcc crystal structure and having in-plane magnetic anisotropy and a second magnetic layer 2 having perpendicular magnetic anisotropy laminated on the first magnetic layer 1 and including a multilayer film of Co and Ni is used.

摘要翻译： 本发明提供一种能够实现稳定振荡并具有高可靠性的自旋转矩振荡器。 使用包括具有bcc晶体结构并具有面内磁各向异性的第一磁性层1和层叠在第一磁性层1上并具有Co和Ni的多层膜的具有垂直磁各向异性的第二磁性层2的叠层结构。

公开(公告)号：US20110134564A1

公开(公告)日：2011-06-09

申请号：US12957229

申请日：2010-11-30

申请人： Nobuo Yoshida ,  Masato Shiimoto ,  Kenichi Akita ,  Kan Yasui

发明人： Nobuo Yoshida ,  Masato Shiimoto ,  Kenichi Akita ,  Kan Yasui

IPC分类号： G11B21/02 ,  G11B5/60 ,  G11B5/712

CPC分类号： H01L43/08 ,  B82Y25/00 ,  G01R33/093 ,  G01R33/098 ,  G11B5/3912 ,  G11B5/398

摘要： A magnetic head, according to one embodiment, includes a sensor film, a sensor cap film provided above the sensor film, a pair of shields including an upper magnetic shield and a lower magnetic shield which serve as electrodes that pass current in a film thickness direction of the sensor film, a track insulating film contacting both sides of the sensor film in the track width direction, a graded domain control film arranged on both sides in the track width direction of the sensor film adjacent the track insulating film, and an element height direction insulating film positioned on an opposite side of the sensor film relative to an air-bearing surface, wherein an edge position of the element height direction insulating film adjacent the sensor film on the air-bearing surface side is substantially the same as an edge position of the sensor cap film in the element height direction.

摘要翻译： 根据一个实施例的磁头包括传感器膜，设置在传感器膜上方的传感器盖膜，包括上磁屏蔽和下磁屏蔽的一对屏蔽件，其用作使电流在膜厚度方向上通过的电极 传感器膜的传感器膜的两侧接触的轨道绝缘膜，布置在邻近轨道绝缘膜的传感器膜的轨道宽度方向两侧的梯度控制膜和元件高度 相对于空气轴承表面定位在传感器膜的相对侧上的方向绝缘膜，其中与空气轴承表面侧相邻的传感器膜的元件高度方向绝缘膜的边缘位置与边缘位置基本相同 传感器盖膜在元件高度方向上。

公开(公告)号：US08773822B2

公开(公告)日：2014-07-08

申请号：US13296866

申请日：2011-11-15

申请人： Masato Matsubara ,  Masato Shiimoto ,  Hiroyuki Katada ,  Keiichi Nagasaka

发明人： Masato Matsubara ,  Masato Shiimoto ,  Hiroyuki Katada ,  Keiichi Nagasaka

IPC分类号： G11B5/33

CPC分类号： G11B5/3146 ,  G11B2005/0024

摘要： In a conventional type magnetic head that performs microwave assisted recording, since a difference in a demagnetizing field between an end and the center of a field generation layer (FGL) grows larger when saturation magnetization of the FGL grows larger, the FGL that generates a microwave is not oscillated in a state of a single domain. Then, a spin-torque oscillator according to the present invention used for a magnetic head for microwave assisted recording is provided with at least one fixed layer, one non-magnetic intermediate layer and one alternating-current magnetic field generation layer respectively and is provided with a structure where saturation magnetization at ends of a film except an end in a direction from an air bearing surface to a surface opposite to it is made smaller than saturation magnetization in the center of the film of the alternating-current magnetic field generation layer.

摘要翻译： 在执行微波辅助记录的常规型磁头中，由于当FGL的饱和磁化强度增大时场强发生层（FGL）的端部和中心之间的消磁场的差异增大，所以产生微波的FGL 在单个域的状态下不振荡。 然后，本发明的用于微波辅助记录磁头的自旋转矩振荡器分别设置有至少一个固定层，一个非磁性中间层和一个交流磁场产生层，并且具有 除了在从空气轴承表面到与其相反的表面的方向上的端部之外，膜的端部处的饱和磁化强度小于交流磁场产生层的膜中心的饱和磁化强度的结构。

公开(公告)号：US08687319B2

公开(公告)日：2014-04-01

申请号：US13404036

申请日：2012-02-24

申请人： Masukazu Igarashi ,  Masato Matsubara ,  Keiichi Nagasaka ,  Masato Shiimoto

发明人： Masukazu Igarashi ,  Masato Matsubara ,  Keiichi Nagasaka ,  Masato Shiimoto

IPC分类号： G11B5/127

CPC分类号： G11B5/1278 ,  G11B5/3146 ,  G11B2005/0024

摘要： A spin torque oscillator for microwave assisted recording includes a perpendicular free layer having a magnetic anisotropy axis in a direction perpendicular to a film surface, and an in-plane free layer composed of a magnetic film effectively having a magnetization easy plane on a film surface. When electric currents flows from the in-plane free layer side to the perpendicular free layer side, both free layers exchange spin information and thereby rotate their respective magnetizations almost antiparallel to each other and along a boundary surface with high-speed. Preferably, the perpendicular free layer is thinner than the in-plane free layer. It is also preferable that a magnetic anisotropy field of the perpendicular free layer attributable to materials should balance, in reverse directions, with an effective demagnetizing field in the perpendicular direction. Furthermore, the perpendicular free layer is preferably placed on the main pole side.

摘要翻译： 用于微波辅助记录的自旋扭矩振荡器包括在垂直于膜表面的方向上具有磁各向异性轴的垂直自由层，以及由在膜表面上具有易磁化平面的磁性膜构成的面内自由层。 当电流从平面内自由层侧流向垂直自由层侧时，两个自由层交换自旋信息，从而使它们各自的磁化几乎反平行并沿着边界表面高速旋转。 优选地，垂直自由层比平面内自由层薄。 由于材料的垂直自由层的磁各向异性场也优选在相反的方向上平衡，并且在垂直方向上具有有效的去磁场。 此外，垂直自由层优选放置在主极侧。

公开(公告)号：US20130070367A1

公开(公告)日：2013-03-21

申请号：US13404036

申请日：2012-02-24

申请人： Masukazu IGARASHI ,  Masato MATSUBARA ,  Keiichi NAGASAKA ,  Masato SHIIMOTO

发明人： Masukazu IGARASHI ,  Masato MATSUBARA ,  Keiichi NAGASAKA ,  Masato SHIIMOTO

IPC分类号： G11B21/02 ,  G11B5/127

CPC分类号： G11B5/1278 ,  G11B5/3146 ,  G11B2005/0024

摘要： A spin torque oscillator for microwave assisted recording includes a perpendicular free layer having a magnetic anisotropy axis in a direction perpendicular to a film surface, and an in-plane free layer composed of a magnetic film effectively having a magnetization easy plane on a film surface. When electric currents flows from the in-plane free layer side to the perpendicular free layer side, both free layers exchange spin information and thereby rotate their respective magnetizations almost antiparallel to each other and along a boundary surface with high-speed. Preferably, the perpendicular free layer is thinner than the in-plane free layer. It is also preferable that a magnetic anisotropy field of the perpendicular free layer attributable to materials should balance, in reverse directions, with an effective demagnetizing field in the perpendicular direction. Furthermore, the perpendicular free layer is preferably placed on the main pole side.

摘要翻译： 用于微波辅助记录的自旋扭矩振荡器包括在垂直于膜表面的方向上具有磁各向异性轴的垂直自由层，以及由在膜表面上具有易磁化平面的磁性膜构成的面内自由层。 当电流从平面内自由层侧流向垂直自由层侧时，两个自由层交换自旋信息，从而使它们各自的磁化几乎反平行并沿着边界表面高速旋转。 优选地，垂直自由层比平面内自由层薄。 由于材料的垂直自由层的磁各向异性场也优选在相反的方向上平衡，并且在垂直方向上具有有效的去磁场。 此外，垂直自由层优选放置在主极侧。