Magnetoresistive read transducer having improved bias profile

Details Magnetoresistive read transducer having improved bias profile Magnetoresistive read transducer having improved bias profile

1992-02-28

1994-02-08

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Head

Hall effect

G11B 5127

Patent

active

052853390

ABSTRACT:
An MR read transducer having passive end regions separated by a central active region comprises an MR layer made from a material having a low uniaxial magnetic anisotropy. A soft magnetic bias layer is adjacent to but spaced from the MR layer in the central region only, and the soft magnetic bias layer is made from a material having a high uniaxial magnetic anisotropy. A longitudinal bias is produced directly in each of the end regions only, and the means for producing the longitudinal bias comprise a layer made from a material having a high uniaxial magnetic anisotropy. Control of the uniaxial anisotropy can be achieved by choosing materials of appropriate magnetostriction or intrinsic uniaxial anisotropy.

REFERENCES:
patent: 4242710 (1980-12-01), Hempstead et al.
patent: 4626947 (1986-12-01), Narishige et al.
patent: 4663607 (1987-05-01), Kitada et al.
patent: 4750072 (1988-06-01), Takagi
patent: 5018037 (1991-05-01), Krounbi

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