Composite magnetic head

Details Composite magnetic head Composite magnetic head

1991-04-29

1992-11-10

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Core

360120, G11B 531

Patent

active

051629615

ABSTRACT:
A composite magnetic head comprises a pair of magnetic core pieces made of an oxide-type magnetic material and bonded to each other for constituting a main magnetic circuit via a magnetic gap therebetween, and a thin, magnetic metal layer formed on a magnetic gap-opposing surface of at least one of the pair of magnetic core pieces for constituting an auxiliary magnetic circuit. The thin, magnetic metal layer has a columnar crystal structure in which the orientations of columnar crystals are substantially in perpendicular to the magnetic gap-opposing surface, and a ratio of diameter to length of each columnar crystal is substantially 0.5 or less. The reverse taper angles of the columnar crystals are preferably 0.degree.-10.degree. to suppress noises, reverse taper angles of the columnar crystals being 0.degree.-10.degree..

REFERENCES:
patent: 4953051 (1990-08-01), Wada et al.
patent: 5001589 (1991-03-01), Rask et al.
patent: 5038242 (1991-08-01), Fukushima et al.

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