Magnetic head employing easy axis thin film inductor

Details Magnetic head employing easy axis thin film inductor Magnetic head employing easy axis thin film inductor

1977-09-21

1978-10-10

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Flux gate

360125, G11B 530

Patent

active

041200110

ABSTRACT:
A flux-sensitive magnetic head employs, at its back part, a structure having a thin single domain magnetic film coated thereon. A first coil wraps around the coated structure; and a second coil wraps around one pole of the head. A direct current is passed through the second coil, thereby to apply an easy axis magnetic bias to the film. By appropriately contouring the back gap of the head, signal flux appearing at the head front gap asserts a differential magnetic force to the easy axis of the film, thereby causing the inductance of the first coil to vary detectably.

REFERENCES:
patent: 3239754 (1966-03-01), Odom, Jr. et al.
patent: 3271665 (1966-09-01), Castro et al.
patent: 3369083 (1968-02-01), Clapper et al.
patent: 3443213 (1969-05-01), Bader et al.
patent: 3829894 (1974-08-01), Watanabe

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