Thin film giant magnetoresistive CPP transducer with flux guide

Details Thin film giant magnetoresistive CPP transducer with flux guide Thin film giant magnetoresistive CPP transducer with flux guide

1996-02-12

1997-05-06

Evans, Jefferson

Dynamic magnetic information storage or retrieval

Head

Hall effect

360126, G11B 539, G11B 531

Patent

active

056277040

ABSTRACT:
A giant magnetoresistive (GMR) thin film transducer employs a pair of flux guide pole members that define a magnetic transducing gap. A GMR structure formed of a stack of multiple layers is located between spaced portions of one of the flux guide pole members and away from the transducing gap. Bias current is supplied in a CPP (current perpendicular to the plane) mode. In an alternative embodiment, a plurality of such GMR structures are connected together serially to provide a larger output signal than that obtained with a single GMR stack.

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patent: 5493467 (1996-02-01), Cain et al.
patent: 5527626 (1996-06-01), Gijs et al.
Journal of Magnetism and Magnetic Materials, #151; Gijs et al; "Perpendicular Giant Magneto . . . " 1995.
Physical Review Letters; Baibich et al; "Giant Magnetoresistance of (001)Fe/(001)Cr Magnetic . . . " Nov. 1988.
IEEE Transactions on Magnetics; Folkerts et al; "Performance of Yoke Type GMR Heads" Nov. 1995.

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