Magnetic recording head capable of defining narrow track width a

Details Magnetic recording head capable of defining narrow track width a Magnetic recording head capable of defining narrow track width a

1992-06-03

1995-03-28

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Head

Core

360119, 360121, 360122, 360113, G11B 5147, G11B 5187

Patent

active

054022959

ABSTRACT:
A magnetic head has a peripheral magnetic field, which is weaker than the coercivity of a recording medium, that is formed beside or around magnetic poles that define a narrow track width. This reinforces a longitudinal magnetic field produced by the head which has been weakened by reducing the cross section of each of the magnetic poles in an effort to obtain the narrow track width. That is, the longitudinal magnetic field distribution formed by the magnetic head is provided by a combination of the principal region having the strongest magnetic field for defining the narrow track width, and the region having a weak magnetic field formed beside or around the principal region. In this way, the combined magnetic field is stronger that the coercivity of the recording medium, but only at the magnetic poles so a narrow track width is achieved.

REFERENCES:
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patent: 4907113 (1990-03-01), Mallary
patent: 4931886 (1990-06-01), Mallary
patent: 4939609 (1990-07-01), Zierer et al.
patent: 4974110 (1990-11-01), Kanamine et al.
patent: 5016342 (1991-05-01), Pisharody et al.
patent: 5095397 (1992-03-01), Nagata et al.
patent: 5189580 (1993-02-01), Pisharody et al.
IEEE Transactions on Magnetics, vol. 24, No. 6, Nov. 1988, J. Kishigami et al., pp. 2841-2843.

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