Combined magnetic write and read head for a recording medium whi

Details Combined magnetic write and read head for a recording medium whi Combined magnetic write and read head for a recording medium whi

1984-07-20

1987-06-23

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Coil

360125, G11B 517

Patent

active

046757660

ABSTRACT:
A combined magnetic write and read head for a recording medium to be magnetized perpendicularly comprises a magnetic conductor body for carrying the magnetic flux, the conductor body having two pole legs which are arranged one behind the other in the direction of relative motion of the head and medium and having a predetermined distance from each other. At least one coil winding is associated with the conductor body. In order to reduce problems regarding the mechanical design of such a head and to make possible at the same time a switchable write and read function having high efficiency, a separate coil winding is associated with each pole leg. The flux conduction directions in the pole legs are adjustable for the write function by means of the separate coil windings such that the flux directions extend, at the ends of the pole legs facing the recording medium, parallel at least to a high degree. Secondly, the magnetic fluxes in the pole legs may be adjusted in such a manner that, at the ends of the pole legs facing the recording medium, the magnetic flux in one of the pole legs is smaller and of a direction opposed to that of the magnetic flux in the other pole leg.

REFERENCES:
patent: 4287544 (1981-09-01), Lazarri
IEEE Transactions on Magnetics: vol. Mag. 16, No. 1, Jan. 1980, pp. 71-76, vol. Mag. 16, No. 5, Sep. 1980, pp. 967-972, vol. Mag. 17, No. 6, Nov. 1981, pp. 2538-2540 and 3120-3122, vol. Mag. 18, No. 6, Nov. 1982, pp. 1158-1163 and 1170-1172.

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