Magnetoresistive head with hard magnetic bias

Details Magnetoresistive head with hard magnetic bias Magnetoresistive head with hard magnetic bias

1996-09-12

1998-05-19

Evans, Jefferson

Dynamic magnetic information storage or retrieval

Head

Hall effect

G11B 539

Patent

active

057543763

ABSTRACT:
A magnetoresistive (MR) head for sensing magnetic data recorded on a magnetic recording medium with high track density and high linear density includes a magnetoresistive conductive layer (MR layer), a soft magnetic layer (SAL) for transversely biasing the MR layer and hard magnet layers for longitudinally biasing and controlling magnetization in the central sensing regions of the MR layer and the SAL. The longitudinal bias applied to the SAL is less than that to the MR layer so that a sensing current produces an effective magnetic field to saturate the SAL transversely. So, magnetization in the MR layer is kept at an angle of 40 to 45 degrees to easy magnetization direction of the MR layer and the improved reproducing output is obtained.

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patent: 5471358 (1995-11-01), Tadokoro et al.
patent: 5483402 (1996-01-01), Batra
patent: 5485334 (1996-01-01), Nix et al.

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