Magnetoresistive head

Details Magnetoresistive head Magnetoresistive head

1982-07-28

1985-12-03

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Hall effect

338 32R, 324252, G11B 530

Patent

active

045569258

ABSTRACT:
A magnetoresistive head comprising a magnetoresistive element, to which a magnetic bias field is applied, is disposed opposite to a magnetic recording medium moving relative thereto, and the resistance value of the magnetoresistive element varying as a result of the relative movement of the magnetoresistive element and the magnetic recording medium is detected to reproduce information recorded on the magnetic recording medium. The magnetoresistive element of the magnetic head has an elongate shape extending along the easy axis of magnetization and has protrusions at its longitudinal ends. The protrusions have, for example, a semicircular or triangular contour. These protrusions are effective for suppressing formation of undesirable domain walls in the magnetoresistive element, so that the magnetic head can operate without substantial variation of its output voltage level and with reduced Barkhousen noise.

REFERENCES:
patent: 4052748 (1977-10-01), Kuijk
patent: 4295173 (1981-10-01), Romankiw et al.
patent: 4321640 (1982-03-01), Van Cestel
patent: 4477794 (1984-10-01), Nomura et al.

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