Composite magnetic head

Details Composite magnetic head Composite magnetic head

1991-07-11

1993-07-13

Hannaher, Constantine

Dynamic magnetic information storage or retrieval

Head

Core

360119, 360120, 360121, 360122, 360125, G11B 523

Patent

active

052279405

ABSTRACT:
A composite magnetic head comprises a pair of magnetic core halves each including a core block formed of an oxide magnetic material and a soft magnetic thin film disposed on said core block interposed with a reaction inhibiting layer, said core halves abutting to each other so that a magnetic gap is defined between the ends of said soft magnetic thin films. The magnetic head has a size relation bcd/a.ltoreq.0.2.times.10.sup.-10 m.sup.2 wherein a is a gap length, measured along the proceeding direction of a magnetic recording medium, c a gap depth, d a gap width as measured along the track width and b is a thickness of said reaction inhibiting layer. Wavy (beat) noise of output signal due to the psuedo gap produced by the reaction inhibiting layer is effectively suppressed.

REFERENCES:
patent: 4768118 (1988-08-01), Kuriyama
patent: 4953049 (1990-08-01), Okuda et al.
patent: 5031063 (1991-07-01), Hasegawa
patent: 5117321 (1992-05-01), Nakanishi et al.
Patent Abstracts of Japan, Abstract of Published Application No. 1-100714 to Tatsuo Hisamura, Apr. 19, 1989.
IEEE Transactions on Magnetics, vol. MAG 23, No. 5, (Part II of Two Parts) Sep. 1987, "Recording Characteristics Of Metal-In-Gap Mini Composite Head", T. Nishiyama et al, pp. 2931-2933.
IEEE Transactions on Magnetics, vol. MAG 20, No. 5, Sep. 84, "Analysis of Metal-In-Gap Heads" J. J. M. Ruigrok, pp. 872-874.

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