Patent ID: 7170722
Filing Date: 2007-01-30
Classification: B82Y,G01R,G11B

Abstract:
1. An extraordinary magnetoresistance (EMR) sensor comprising: a substrate; an EMR active film on the substrate, the active film comprising a nonmagnetic semiconductor material responsive to a magnetic field generally perpendicular to the active film; an electrically conductive shunt in contact with the active film; a pair of current leads in contact with the active film; a pair of voltage leads in contact with the active film; and a ferromagnetic multilayer on the substrate and having its magnetic moment oriented generally perpendicular to the planes of the ferromagnetic multilayer and active film, said multilayer comprising a plurality of like bilayers, said bilayer comprising a first film of Co, Fe or an alloy consisting essentially of Co and Fe and a second film of Pt, Pd or an alloy consisting essentially of Pt and Pd.