| 摘要 |
<p>An MR head of a simpler structure, with a reduced Barkhausen noise and a high sensitivity comprises a ferromagnetic MR layer and a bias layer in direct contact with the MR layer thereby providing an exchange magnetic coupling to the MR layer. The MR layer has a sensing area for a sense current flowing in the direction of the uniaxial anisotropy of the MR layer. The sensing area defines, as one peripheral edge thereof, an inlet for receiving magnetic signal fields from a magnetic recording medium. The bias layer is formed of an antiferromagnetic material or a ferrimagnetic material, and the direction of the uniaxial magnetic anisotropy of the bias layer is set at 45 DEG from the direction of the sense current, thereby applying a bias magnetic field effective in transverse and longitudinal directions relative to the sense current. The bias layer surrounds the sensing area of the MR layer except for the inlet side of the sensing area. <IMAGE></p> |
