Yoke type thin-film magnetic head and method for suppressing Bar

Details Yoke type thin-film magnetic head and method for suppressing Bar Yoke type thin-film magnetic head and method for suppressing Bar

1989-04-19

1991-06-04

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Head

Hall effect

360110, 338 32R, 324252, G11B 5127, G11B 533

Patent

active

050219090

ABSTRACT:
A yoke type thin-film magneto-resistive heat includes a magneto-resistive element that detects the magnetic field generated in the magnetic recording medium as resistance changes, a yoke, that leads magnetic flux from the head gap to the above mentioned magneto-resistive element, a DC magnetic field application system, that applies a desirable weak magnetic field to the above mentioned longitudinal direction of the magneto-resistive element, and a conductor, that applies a desirable bias magnetic field to the above mentioned magneto-resistive element in the strip width direction. The easy axis of magnetization of the magneto-resistive element is inclined in a range of 20.degree.-40.degree. to the mentioned longitudinal direction of the magneto-resistive element, so that, anisotropic angle dispersion conditions are relaxed, at the same time, by applying a desirable bias magnetic field to the magneto-resistive element in the strip width direction. Also, by shifting the operating point to a point having excellent linearity, Barkhausen noise, caused by magnetization switching generated in the magnetic field area with the same direction as the bias magnetic field direction, can be suppressed, and the reproducing output signal can be of high fidelity.

REFERENCES:
"Self-Bias Magneto Resistive Read Head", Matsushita Elec. Ind. Co., Ltd., Noboru NOMURA et al., pp. 15-22.

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