Laminated hard magnet in MR sensor

Details Laminated hard magnet in MR sensor Laminated hard magnet in MR sensor

1997-12-30

2000-11-07

Klimowicz, William

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

G11B 539

Patent

active

061445347

ABSTRACT:
A magneto-resistive sensor has a magneto-resistive element with an active area with an electrical resistance sensitive to changes in magnetic flux. Two hard magnets on opposing sides of the magneto-resistive element magnetically bias the magneto-resistive element. Each hard magnet includes a seed layer of a soft magnetic, electrically conductive material between two magnet layers of a hard magnetic, electrically conductive material laminated longitudinally together such that the seed layer and the magnet layers exhibit unified magnetic properties. The seed layer is preferably an amorphous material such as nitrided sendust. The laminated structure allows for a thicker magnet structure with low electrical resistance but without degradation of magnetic properties due to the increased thickness.

REFERENCES:
patent: 4743988 (1988-05-01), Sato et al.
patent: 5290629 (1994-03-01), Kobayashi et al.
patent: 5327638 (1994-07-01), Haines
patent: 5434826 (1995-07-01), Ravipati et al.
patent: 5608593 (1997-03-01), Kim et al.
patent: 5657190 (1997-08-01), Araki et al.
patent: 5696654 (1997-12-01), Gill et al.
patent: 5739987 (1998-04-01), Yuan et al.
patent: 5742459 (1998-04-01), Shen et al.
patent: 5790351 (1998-08-01), Suzuki
patent: 5995338 (1999-11-01), Watanabe et al.

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