Giant magnetoresistive reproduce head.

A giant magnetoresistance-dual magnetoresistance sensor or reproduce head (GMR-DMR) (10) comprising multilayers of alternating magnetic and nonmagnetic thin film layers (16), (18), (20), (22), (24) arranged such that sets of N sandwiched magnetic and nonmagnetic film layers are formed on either side of the center-most, conductive, nonmagnetic or magnetic film layer (26), so that the layered structure operates in the fashion of a dual magnetoresistive sensor or reproduce head and exhibits giant magnetoresistance. Preferably the outer-most magnetic layers (16), (18) are of a thickness that differs from the remaining magnetic film layers (20) in order to reduce self-bias level variance between the outermost and innermost magnetic film layers (16), (18), (20). Sense current flow through the GMR-DMR structure is induced by sensed magnetic fields and generated giant magnetoresistance changes are detected as head output voltage variations.