Patent ID: 6157301
Filing Date: 2000-12-05
Classification: G01V,G08B,H01F

Abstract:
A marker for a magnetic electronic article surveillance system, said marker comprising:an oblong alarm-triggering strip composed of an amorphous ferromagnetic alloy;at least one oblong activation strip composed of a semi-hard magnetic alloy, applied along said alarm-triggering strip;said semi-hard magnetic alloy comprising 3 through 9 wt % Ni, 5 through 11 wt % Cr, 6 through 12 wt % Mo, and Fe such that an overall weight percent of Fe, Ni and Mo is less than 95 wt % of said semi-hard magnetic alloy; andsaid semi-hard magnetic alloy having a coercive force H.sub.c in a range between 30 and 60 A/cm and a remanence B.sub.r of at least 1.0 T.