公开(公告)号：US4896235A

公开(公告)日：1990-01-23

申请号：US298299

申请日：1989-01-17

Applicant: Hiroshi Takino ,  Shigeyoshi Imakoshi, deceased ,  Nobuhiro Terada ,  Norio Saito ,  Hideo Suyama ,  Kenichiro Tsunewaki

Inventor： Hiroshi Takino ,  Shigeyoshi Imakoshi, deceased ,  Nobuhiro Terada ,  Norio Saito ,  Hideo Suyama ,  Kenichiro Tsunewaki

IPC: G11B5/31 ,  G11B5/39

CPC classification number: G11B5/3925 ,  G11B5/3903 ,  G11B5/3941 ,  G11B5/3954 ,  G11B5/3961 ,  G11B5/3964 ,  G11B5/398 ,  G11B5/399 ,  G11B5/3156

Abstract: A MR magnetic head with a sensing element which comprises a plurality of superposed magnetic layers which have a magnetoresistance effect in at least one and a nonmagnetic intermediate layer sandwiched between the magnetic layers, and a sensing current is fed so as to flow in the sensing element in the same direction as a signal magnetic field which is applied to the element. Each of the magnetic layers is formed so as to have an easy axis of magnetization which is substantially perpendicular to the signal magnetic field or to have an isotropic magnetic characteristic in the magnetic film plane, which eliminates Barkhausen noise.

Abstract translation: 一种具有感测元件的MR磁头，其包括在夹在所述磁性层之间的至少一个磁阻效应和非磁性中间层中的多个重叠磁性层，并且馈送感测电流以在所述感测元件 在与施加到元件的信号磁场相同的方向上。 每个磁性层形成为具有基本上垂直于信号磁场的易磁化轴或者在磁性膜平面中具有各向同性磁特性，这消除了巴克豪森噪声。