Perpendicular magnetic playback head and a perpendicular magneti

Details Perpendicular magnetic playback head and a perpendicular magneti Perpendicular magnetic playback head and a perpendicular magneti

1983-04-11

1986-09-23

Hecker, Stuart N.

Dynamic magnetic information storage or retrieval

Head

Hall effect

324252, 338 32R, G11B 512, G11B 530

Patent

active

046139184

ABSTRACT:
A magneto-resitive playback head and a recording and reproducing device for reproducing a recording signal from a double-layered film type perpendicular magnetic recording medium. The playback head includes a magneto-resistive element included in high-permeability thin films and having one end portion facing the recording medium. The magneto-resistive element exhibits a magneto-resistance effect responsive to magnetic fluxes generated from signal magnetization in the recording medium. The head also includes electrodes for supplying an electric current longitudinally of the magneto-resistive element, and high-permeability members for introducing the signal magnetic fluxes passed through the magneto-resistive element again to the recording medium. A magnetic recording and reproducing device comprises the playback head, a thin film magnetic recording head, a recording circuit, a playback circuit, and a driving circuit which gives a relative motion between the medium and the heads.

REFERENCES:
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patent: 4413297 (1983-11-01), Tanaka et al.
patent: 4423450 (1983-12-01), Hamilton
patent: 4425593 (1984-01-01), Postma
patent: 4441131 (1984-04-01), Osanai
patent: 4477794 (1984-10-01), Nomura et al.

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