公开(公告)号：US08189303B2

公开(公告)日：2012-05-29

申请号：US12222543

申请日：2008-08-12

申请人： Shinji Hara ,  Yoshihiro Tsuchiya ,  Tsutomu Chou ,  Daisuke Miyauchi ,  Takahiko Machita

发明人： Shinji Hara ,  Yoshihiro Tsuchiya ,  Tsutomu Chou ,  Daisuke Miyauchi ,  Takahiko Machita

IPC分类号： G11B5/39 ,  G11B5/11

CPC分类号： G11B5/3912 ,  B82Y25/00 ,  G01R31/318536 ,  G01R31/318541 ,  G01R33/093

摘要： A thin film magnetic head includes a magneto-resistance (MR) laminated body, a lower shield layer and an upper shield layer that face the first MR magnetic layer. The lower and upper shield layers respectively have first and second anti-parallel layers and first and second antiferromagnetic layers. An exchange coupling intensity relating to an antiferromagnetic coupling between the second anti-parallel layer and the second antiferromagnetic layer is greater in the peripheral area of a projection area than that of the projection area of the upper shield layer side end surface of the MR laminated body to the film surface's orthogonal direction.

摘要翻译： 薄膜磁头包括面对第一MR磁性层的磁阻（MR）层叠体，下屏蔽层和上屏蔽层。 下屏蔽层和上屏蔽层分别具有第一和第二反平行层以及第一和第二反铁磁层。 与第二反平行层和第二反铁磁性层之间的反铁磁耦合有关的交换耦合强度在投影区域的周边区域中大于MR层叠体的上屏蔽层侧端面的投影面积 到膜表面的正交方向。

公开(公告)号：US20100067148A1

公开(公告)日：2010-03-18

申请号：US12232332

申请日：2008-09-16

申请人： Yoshihiro Tsuchiya ,  Tsutomu Chou ,  Shinji Hara ,  Daisuke Miyauchi ,  Takahiko Machita

发明人： Yoshihiro Tsuchiya ,  Tsutomu Chou ,  Shinji Hara ,  Daisuke Miyauchi ,  Takahiko Machita

IPC分类号： G11B5/33 ,  G11B5/48

CPC分类号： G11B5/3932 ,  B82Y25/00 ,  G11B5/3912 ,  G11B5/3945 ,  H01F10/3254 ,  H01F10/3272

摘要： A thin film magnetic head comprises an MR laminated body that has first and second magnetic layers, a nonmagnetic middle layer, and the first and second magnetic layers and the nonmagnetic middle layer are laminated to make contact with each other in respective order. First and second antiferromagnetic layers are provided with the first and second magnetic layers respectively. The first antiferromagnetic layer and/or the second antiferromagnetic layer contains a void part or a thin portion at least in a portion of the projection area toward the orthogonal direction to the film surface of the MR laminated body.

摘要翻译： 薄膜磁头包括具有第一和第二磁性层，非磁性中间层，并且第一和第二磁性层和非磁性中间层被层压以相互接触的MR层叠体。 第一和第二反铁磁层分别设置有第一和第二磁性层。 第一反铁磁层和/或第二反铁磁性层至少在与MR层叠体的膜表面正交的方向上的投影区域的至少一部分中具有空隙部分或薄壁部分。

公开(公告)号：US08164986B2

公开(公告)日：2012-04-24

申请号：US12471786

申请日：2009-05-26

申请人： Susumu Aoki ,  Daisuke Miyauchi ,  Seiichi Takayama ,  Koji Shimazawa ,  Tetsuya Roppongi

发明人： Susumu Aoki ,  Daisuke Miyauchi ,  Seiichi Takayama ,  Koji Shimazawa ,  Tetsuya Roppongi

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/3116 ,  G11B5/6088 ,  G11B11/10534 ,  G11B2005/0005 ,  G11B2005/0021

摘要： A magnetic recording head capable of a satisfying thermally-assisted magnetic recording without depending on the use of a near-field light generator is provided. The head comprises a waveguide and a main magnetic pole having a main pole tip. Further, at least a portion of the main pole tip is embedded in a groove provided in the upper surface of the waveguide. Further, a second clad layer is provided on the first clad layer and on a rear side from the main pole tip. This configuration of the first and second clad layers suppresses the absorption of the light propagating through the waveguide by the main magnetic pole. Further, the configuration in which at least a portion of the main pole tip is embedded in the groove can cause the distance between the light spot center of the waveguide and the main magnetic pole to be sufficiently small.

摘要翻译： 提供一种能够满足热辅助磁记录而不依赖于近场光发生器的磁记录头。 头部包括具有主极尖端的波导和主磁极。 此外，主极尖的至少一部分嵌入设置在波导的上表面中的槽中。 此外，第二覆盖层设置在第一覆盖层上并且在主极尖端的后侧。 第一和第二包层的这种配置抑制由主磁极吸收通过波导传播的光。 此外，主极尖的至少一部分埋设在槽中的结构可以使波导的光点中心与主磁极之间的距离足够小。

公开(公告)号：US20100149930A1

公开(公告)日：2010-06-17

申请号：US12335943

申请日：2008-12-16

申请人： Eiji Komura ,  Koji Shimazawa ,  Daisuke Miyauchi

发明人： Eiji Komura ,  Koji Shimazawa ,  Daisuke Miyauchi

IPC分类号： G11B11/00 ,  G11B5/02

CPC分类号： G11B5/314 ,  G11B5/4866 ,  G11B5/6088 ,  G11B7/1387 ,  G11B2005/001 ,  G11B2005/0021

摘要： Provided is a near-field light generating element in which reduced is the propagation loss of excited surface plasmon that propagates to the near-field light generating end. The element comprises: a waveguide through which light for exciting surface plasmon propagates; and a plasmon antenna comprising a near-field light generating end and a propagation surface or edge. The propagation surface or edge extends to the near-field light generating end, and causes surface plasmon excited by the light to propagate thereon. Further, a portion of the side surface on the near-field light generating end side is opposed to the propagation surface or edge with a predetermined distance so as for the light to be coupled with the plasmon antenna in a surface plasmon mode. In this configuration, surface plasmon can propagates without significantly changing its wavenumber, which leads to a less propagation loss, and to an improved light use efficiency.

摘要翻译： 提供了一种近场光产生元件，其中传播到近场光产生端的被激发的表面等离子体激元的传播损耗减小。 该元件包括：用于激发表面等离子体激元的光传播的波导; 以及包括近场光产生端和传播表面或边缘的等离子体激元天线。 传播表面或边缘延伸到近场光产生端，并且使由光激发的表面等离子体激发在其上。 此外，近场光产生端侧的侧面的一部分与传播面或边缘以预定距离相对，以便以等离子体激元模式与等离子体激元天线耦合的光。 在这种配置中，表面等离子体激元可以传播而不会明显地改变其波数，这导致较少的传播损耗，并提高光的使用效率。

公开(公告)号：US20110002199A1

公开(公告)日：2011-01-06

申请号：US12496340

申请日：2009-07-01

申请人： Seiichi Takayama ,  Daisuke Miyauchi ,  Susumu Aoki ,  Koji Shimazawa

发明人： Seiichi Takayama ,  Daisuke Miyauchi ,  Susumu Aoki ,  Koji Shimazawa

IPC分类号： G11B11/00 ,  G02B6/12 ,  G11B5/02

CPC分类号： G11B5/314 ,  B82Y20/00 ,  G02B6/1226 ,  G11B5/3116 ,  G11B5/3143 ,  G11B5/6088 ,  G11B2005/0005 ,  G11B2005/0021

摘要： Provided is a near-field light generator capable of avoiding a noise to the generated near-field light. The generator comprises a waveguide and a plasmon antenna comprising a propagation surface or edge, for propagating surface plasmon, extending to a near-field light generating end. A portion of one side surface of the waveguide is opposed to a portion of the propagation surface or edge, so as for the waveguide light to be coupled with the plasmon antenna. And an end surface of the waveguide is inclined in such a way as to become away from the plasmon antenna toward the near-field light generating end side. The light that propagates through the waveguide and is not transformed into surface plasmon is refracted or totally reflected in the inclined end surface, does not come close to the generated near-field light, thus does not become a noise for the generated near-field light.

摘要翻译： 提供能够避免产生的近场光的噪声的近场光发生器。 发生器包括波导和等离子体激元天线，其包括传播表面等离子体的传播表面或边缘，延伸到近场光产生端。 波导的一个侧表面的一部分与传播表面或边缘的一部分相对，以使波导光与等离子体激元天线耦合。 并且波导的端面以使得等离子体激元离开近场光产生端侧的方式倾斜。 通过波导传播并且未被转换成表面等离子体的光在倾斜端面折射或全反射，不会接近所产生的近场光，因此不会产生所产生的近场光的噪声 。

公开(公告)号：US20090273864A1

公开(公告)日：2009-11-05

申请号：US12005274

申请日：2007-12-27

申请人： Takahiko Machita ,  Kei Hirata ,  Koji Shimazawa ,  Daisuke Miyauchi

发明人： Takahiko Machita ,  Kei Hirata ,  Koji Shimazawa ,  Daisuke Miyauchi

IPC分类号： G11B5/33 ,  B44C1/22

CPC分类号： G01R33/093 ,  B82Y25/00 ,  G01R33/098 ,  G11B5/3912 ,  G11B5/3932 ,  H01L43/12

摘要： A magnetoresistive element includes a first and a second shield, and an MR stack disposed between the shields. The MR stack includes a first and a second ferromagnetic layer, and a nonmagnetic spacer layer disposed between the ferromagnetic layers. The first and second ferromagnetic layers have magnetizations that are in directions antiparallel to each other when no external magnetic field is applied to the layers, and that change directions in response to an external magnetic field. An insulating layer is formed to touch a rear end face of the MR stack and the first shield, and a bias magnetic field applying layer is formed above the insulating layer with a buffer layer disposed in between. The bias magnetic field applying layer includes a hard magnetic layer and a high saturation magnetization layer. The high saturation magnetization layer is located between the rear end face and the hard magnetic layer, but not located between the first shield and the hard magnetic layer.

摘要翻译： 磁阻元件包括第一和第二屏蔽以及设置在屏蔽之间的MR堆叠。 MR堆叠包括第一和第二铁磁层，以及设置在铁磁层之间的非磁性间隔层。 当没有外部磁场施加到层上时，第一和第二铁磁层具有在彼此反平行的方向上的磁化，并且响应于外部磁场改变方向。 形成绝缘层以接触MR堆叠和第一屏蔽的后端面，并且在绝缘层上形成有偏置磁场施加层，其间设置有缓冲层。 偏置磁场施加层包括硬磁性层和高饱和磁化层。 高饱和磁化层位于后端面和硬磁性层之间，但不位于第一屏蔽和硬磁性层之间。

公开(公告)号：US20070121255A1

公开(公告)日：2007-05-31

申请号：US11519921

申请日：2006-09-13

申请人： Yoshihiro Tsuchiya ,  Tomohito Mizuno ,  Koji Shimazawa ,  Daisuke Miyauchi

发明人： Yoshihiro Tsuchiya ,  Tomohito Mizuno ,  Koji Shimazawa ,  Daisuke Miyauchi

IPC分类号： G11B5/33 ,  G11B5/127

CPC分类号： B82Y25/00 ,  B82Y40/00 ,  G01R33/093 ,  G11B5/3906 ,  H01F10/1936 ,  H01F10/3272 ,  H01F41/303 ,  H01L43/10

摘要： A magneto-resistance effect element according to the present invention comprises a pinned layer whose magnetization direction is fixed; a free layer whose magnetization direction varies in accordance with an external magnetic field; and a nonmagnetic spacer layer that is arranged between said pinned layer and said free layer. At least either said pinned layer or said free layer includes a Heusler alloy layer that is disposed adjacent to said spacer layer, and compounds are arranged in a dotted pattern at an interface between said spacer layer and at least said spacer layer and said pinned layer or said spacer layer and said free layer, said compounds including material that is included in said Heusler alloy layer.

摘要翻译： 根据本发明的磁阻效应元件包括其磁化方向固定的钉扎层; 其磁化方向根据外部磁场而变化的自由层; 以及布置在所述被钉扎层和所述自由层之间的非磁性间隔层。 所述被钉扎层或所述自由层中的至少一个包括邻近所述间隔层设置的Heusler合金层，并且化合物以虚线图案布置在所述间隔层和至少所述间隔层和所述钉扎层之间的界面处，或 所述间隔层和所述自由层，所述化合物包括包含在所述Heusler合金层中的材料。

公开(公告)号：US08213272B2

公开(公告)日：2012-07-03

申请号：US12482851

申请日：2009-06-11

申请人： Seiichi Takayama ,  Satoshi Tomikawa ,  Toshiyuki Ayukawa ,  Daisuke Miyauchi ,  Koji Shimazawa

发明人： Seiichi Takayama ,  Satoshi Tomikawa ,  Toshiyuki Ayukawa ,  Daisuke Miyauchi ,  Koji Shimazawa

IPC分类号： G11B11/00

CPC分类号： G02B6/1228 ,  G02B2006/12078 ,  G11B5/3133 ,  G11B5/6088 ,  G11B2005/0005 ,  G11B2005/0021

摘要： A waveguide is provided, in which the optical coupling efficiency to a light source is sufficiently high, and the light-emitting spot center is stably provided at the intended position. The waveguide comprises a multilayered structure in which refractive indexes of layers having a surface contact with each other are different from each other. The multilayered structure is divided into a plurality of groups, and the length from the light-receiving end surface to the light-emitting end surface of one group is different from that of the neighboring group, and the protruded light-emitting end surface of the first group defined as a group that has the largest length includes a center of the light-emitting spot. In this waveguide, the state in which the light-emitting spot center is positioned within the light-emitting end surface does not easily be changed, even when the light-receiving spot center within the light-receiving end surface is rather displaced.

摘要翻译： 提供了一种波导，其中对光源的光耦合效率足够高，并且发光光点中心稳定地设置在预期位置。 波导包括彼此具有表面接触的层的折射率彼此不同的多层结构。 多层结构被分成多个组，从一个组的受光端面到发光端面的长度不同于相邻组的发光端面的突出的发光端面 被定义为具有最大长度的组的第一组包括发光点的中心。 在该波导中，发光光点中心位于发光端面内的状态也不容易改变，即使光接收端面内的光接收点中心相当偏离。

公开(公告)号：US08107325B2

公开(公告)日：2012-01-31

申请号：US12335943

申请日：2008-12-16

申请人： Eiji Komura ,  Koji Shimazawa ,  Daisuke Miyauchi

发明人： Eiji Komura ,  Koji Shimazawa ,  Daisuke Miyauchi

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/4866 ,  G11B5/6088 ,  G11B7/1387 ,  G11B2005/001 ,  G11B2005/0021

摘要： Provided is a near-field light generating element in which reduced is the propagation loss of excited surface plasmon that propagates to the near-field light generating end. The element comprises: a waveguide through which light for exciting surface plasmon propagates; and a plasmon antenna comprising a near-field light generating end and a propagation surface or edge. The propagation surface or edge extends to the near-field light generating end, and causes surface plasmon excited by the light to propagate thereon. Further, a portion of the side surface on the near-field light generating end side is opposed to the propagation surface or edge with a predetermined distance so as for the light to be coupled with the plasmon antenna in a surface plasmon mode. In this configuration, surface plasmon can propagates without significantly changing its wavenumber, which leads to a less propagation loss, and to an improved light use efficiency.

摘要翻译： 提供了一种近场光产生元件，其中传播到近场光产生端的被激发的表面等离子体激元的传播损耗减小。 该元件包括：用于激发表面等离子体激元的光传播的波导; 以及包括近场光产生端和传播表面或边缘的等离子体激元天线。 传播表面或边缘延伸到近场光产生端，并且使由光激发的表面等离子体激发在其上。 此外，近场光产生端侧的侧面的一部分与传播面或边缘以预定距离相对，以便以等离子体激元模式与等离子体激元天线耦合的光。 在这种配置中，表面等离子体激元可以传播而不会明显地改变其波数，这导致较少的传播损耗，并提高光的使用效率。

公开(公告)号：US07948710B2

公开(公告)日：2011-05-24

申请号：US12177501

申请日：2008-07-22

申请人： Koji Shimazawa ,  Daisuke Miyauchi ,  Katsuki Kurihara

发明人： Koji Shimazawa ,  Daisuke Miyauchi ,  Katsuki Kurihara

IPC分类号： G11B5/02

CPC分类号： G11B5/314 ,  G11B5/4866 ,  G11B2005/0005 ,  G11B2005/0021

摘要： In a heat-assisted magnetic recording, a thin-film magnetic head, which can form stable recording bits pattern having steep magnetization transition regions without using a near-field light generating element, is provided. The head is formed on an element forming surface of a substrate, and has a waveguide for leading a light for heat-assist to a magnetic medium and a write element formed on a trailing side of the waveguide and having a magnetic pole for applying a write field to the medium. Here, a write field profile, which is an intensity distribution of the write field from the pole along a track in a recoding layer of the medium, has a projecting region on a leading side. Further, an anisotropy field profile, which is a distribution of an anisotropy field when the anisotropy field is reduced by irradiating the light on a part of the recoding layer, traverses the projecting region.

摘要翻译： 在热辅助磁记录中，提供了可以形成具有陡峭的磁化转变区而不使用近场光产生元件的稳定记录位图形的薄膜磁头。 头形成在基板的元件形成表面上，并且具有用于将用于将热辅助的光引导到磁介质的波导和形成在波导的后侧的写入元件，并且具有用于施加写入的磁极 领域到媒介。 这里，作为介质的记录层中的沿着磁道的磁极的写入场的强度分布的写场分布在前端具有突出区域。 此外，当通过在记录层的一部分照射光而减小各向异性场时的各向异性场的分布的各向异性场分布横穿该突出区域。