公开(公告)号：US20020034055A1

公开(公告)日：2002-03-21

申请号：US09820047

申请日：2001-03-28

Applicant: FUJITSU LIMITED

Inventor： Yoshihiko Seyama ,  Atsushi Tanaka ,  Keiichi Nagasaka ,  Yutaka Shimizu ,  Shin Eguchi ,  Hitoshi Kanai ,  Reiko Kondo ,  Hitoshi Kishi ,  Junya Ikeda

IPC: G11B005/39

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/3903 ,  G11B2005/3996 ,  H01F10/3259 ,  H01F10/3268 ,  H01F10/3295

Abstract: Disclosed herein is a spin valve magnetoresistive sensor including a first conductor layer, a free ferromagnetic layer provided on the first conductor layer, a nonmagnetic intermediate layer provided on the free ferromagnetic layer, a pinned ferromagnetic layer provided on the nonmagnetic intermediate layer, an antiferromagnetic layer provided on the pinned ferromagnetic layer, and a second conductor layer provided on the antiferromagnetic layer. At least one of the free ferromagnetic layer and the pinned ferromagnetic layer has a thickness larger than that providing a maximum resistance change rate or resistance change amount in the case of passing a current in an in-plane direction of the at least one layer. That is, the thickness of at least one of the free ferromagnetic layer and the pinned ferromagnetic layer falls in the range of 3 nm to 12 nm.

Abstract translation: 本文公开了一种自旋阀磁阻传感器，其包括第一导体层，设置在第一导体层上的自由铁磁层，设置在自由铁磁层上的非磁性中间层，设置在非磁性中间层上的钉扎铁磁层，反铁磁层 设置在被钉扎的铁磁层上，以及设置在反铁磁层上的第二导体层。 自由铁磁层和被钉扎的铁磁层中的至少一个具有大于在通过至少一个层的面内方向的电流的情况下提供最大电阻变化率或电阻变化量的厚度的厚度。 也就是说，自由铁磁层和被钉扎铁磁层中的至少一个的厚度落在3nm至12nm的范围内。

公开(公告)号：US20020163766A1

公开(公告)日：2002-11-07

申请号：US10027651

申请日：2001-12-20

Applicant: FUJITSU LIMITED

Inventor： Shin Eguchi ,  Chikayoshi Kamata ,  Junya Ikeda ,  Atsushi Tanaka

IPC: G11B005/39

CPC classification number: H01L43/08 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/012 ,  G11B5/3903 ,  H01F10/3254 ,  H01L43/12 ,  Y10T29/49041 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49052

Abstract: The upper portion of a magnetoresistive film is interposed between insulators in the lateral direction of a recording track in a current-perpendicular-to-the-plane structure magnetoresistive element. Domain control magnetic layers sandwich the upper portion of the magnetoresistive film along with the insulators in the lateral direction. The insulators serve to establish a narrower path for electric current between the lower portion of the magnetoresistive film and an upper electrode layer. The substantial width in the lateral direction can thus be reduced in the magnetoresistive film. In addition, a longitudinal biasing magnetic field established between the domain control magnetic layers efficiently acts on the magnetoresistive film. In particular, if a free magnetic layer is included in the upper portion of the magnetoresistive film, the free magnetic layer can be subjected to a larger longitudinal biasing magnetic field. A single domain property can be realized in the free ferromagnetic layer enough. The Barkhausen noise can be reduced.

Abstract translation: 磁阻膜的上部位于电流垂直于平面结构的磁阻元件中的记录轨道的横向方向上的绝缘体之间。 磁畴层控制磁性层与绝缘体沿横向夹着磁阻膜的上部。 绝缘体用于在磁阻膜的下部和上电极层之间建立较窄的电流路径。 因此，可以在磁阻膜中减小横向上的实质宽度。 此外，在畴控制磁性层之间建立的纵向偏置磁场有效地作用在磁阻膜上。 特别地，如果在磁阻膜的上部包含自由磁性层，则可以对自由磁性层进行较大的纵向偏置磁场。 可以在自由铁磁层中实现单一畴性。 巴克豪森噪音可以减少。

公开(公告)号：US20020154453A1

公开(公告)日：2002-10-24

申请号：US09951102

申请日：2001-09-12

Applicant: FUJITSU LIMITED

Inventor： Junya Ikeda

IPC: G11B005/39

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3967 ,  G11B2005/3996 ,  Y10T29/49046

Abstract: A current-perpendicular-to-the-plane (CPP) structure electromagnetic transducer element comprises upper and lower electrically-conductive lead layers. The lead layers are employed to supply an electric current to an electromagnetic transducer film. An electrically-conductive terminal piece is allowed to stand on the surface of the lower electrically-conductive lead layer. The contact established between the electrically-conductive terminal piece and the electromagnetic transducer film is allowed to define the path for the electric current. The reduced contact area of the electrically-conductive terminal piece contributes to reduction in the size or extent of the path for the electric current through the electromagnetic transducer film. The path of the electric current can be reduced in the CPP structure electromagnetic transducer element without relying on reduction in the size of the electromagnetic transducer film.

Abstract translation: 电流垂直于平面（CPP）结构的电磁换能器元件包括上和下导电引线层。 引线层用于向电磁换能器膜提供电流。 允许导电端子件站在下部导电引线层的表面上。 在导电端子片和电磁换能器膜之间建立的接触允许限定电流的路径。 导电端子片的减小的接触面积有助于减小通过电磁换能器膜的电流的路径的尺寸或程度。 可以在CPP结构电磁换能器元件中减小电流的路径，而不依赖于电磁换能器膜的尺寸的减小。