Magnetic disk memory system

Details Magnetic disk memory system Magnetic disk memory system

1994-03-14

1996-01-23

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Hall effect

360104, G11B 539, G11B 531

Patent

active

054869676

ABSTRACT:
According to the present invention, there is provided a magnetic disk memory system. An embodiment of this system comprises a magnetic disk of a perpendicular recording type, including a soft magnetic backing layer and a magnetic recording layer of a perpendicular magnetic anisotropy formed on the backing layer, and a magnetic head for writing or reading of data with respect to the magnetic disk, wherein the magnetic head comprises (a) a pair of main magnetic poles each of which made of a material having a high magnetic permeability, one end of the each pole being located so as to face the magnetic disk surface, (b) a non-magnetic interlayer provided between two main magnetic poles of the pair, (c) a recording coil disposed so as to generate a magnetic flux passing through the magnetic disk via the main magnetic poles, and (d) an MR element provided via an insulation layer on the other ends of the pair of main magnetic poles, one MR element having a film surface parallel to end surfaces of the other ends of the main magnetic poles, and being magnetically coupled with the pair of main magnetic poles.

REFERENCES:
patent: 4901185 (1990-02-01), Kubo et al.
patent: 5041932 (1991-08-01), Hamilton
patent: 5223998 (1993-06-01), Tokuyama et al.

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