Shorted dual element magnetoresistive reproduce head exhibiting

Details Shorted dual element magnetoresistive reproduce head exhibiting Shorted dual element magnetoresistive reproduce head exhibiting

1991-12-05

1993-03-09

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Head

Hall effect

360110, 324252, 338 32R, G11B 530

Patent

active

051930382

ABSTRACT:
An MR head includes two substantially identical MR elements, separated by a thin film non-magnetic electrically conductive spacer. A current applied to the MR head splits into two respective substantially equal currents that flow in the same direction through the substantially identical MR elements, to provide mutual bias and to serve as sense currents for detecting change in element resistance. The MR elements are biased to operate in a magnetically unsaturated mode. This results in a "bootstrapping" of short wavelength signals that effectively amplifies the reproduced signal over a broad region of the signal spectrum when the linear spacing between the MR elements is in the range of from one half to one times the half-wavelength of signals recorded on a magnetic recording medium.

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IBM Technical Disclosure Bulletin, vol. 17, No. 11, Apr. 1975, pp. 3478-3480, "Balanced Resistance Magnetoresistive Head Compensated Against Thermal and Piezoresistive Effects", by Anderson.

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