Magneto-resistive head

Details Magneto-resistive head Magneto-resistive head

1987-02-10

1989-03-28

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Hall effect

G11B 533

Patent

active

048169480

ABSTRACT:
Magneto-resistive head comprising a magneto-resistive film, and a soft magnetic film disposed at one side of said magneto-resistive film, which soft magnetic film is magnetized by electric current flowing through the magneto-resistive film, to which a bias magnetic field is applied by the magnetization of the soft magnetic film, whereby they are so structured that 0.7.times.B.sub.SMR .times.T.sub.MR <B.sub.SSF .times.T.sub.SF is satisfied, where T.sub.MR and B.sub.SMR represent the thickness and the saturated magnetic flux density, respectively, of the magneto-resistive film and T.sub.SF and B.sub.SSF represent the thickness and the saturated magnetic flux density, respectively, of the soft magnetic film.

REFERENCES:
patent: 3860965 (1975-01-01), Voegeli
patent: 3864751 (1975-02-01), Beaulieu et al.
patent: 3979775 (1976-09-01), Schwarz
patent: 4103315 (1978-07-01), Hempstead et al.
patent: 4663685 (1987-05-01), Tsang
Bajorek et al., "An Integrated Magnetoresistive Read, Inductive Write High Density Recording Head," AIP Conference Proceedings, No. 24, pp. 548-549, 1974.
Tsang, "Magnetics of Small Magnetoresistive Sensors (Invited)," J. Appl. Phys. 55(6), Mar. 15, 1984.

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