Patent ID: 7432815

Claim:
A marker for a magnetic theft protection system, comprising: (a) at least one oblong alarm strip comprising an amorphous ferromagnetic alloy; and (b) at least one oblong activation strip comprising an alloy consisting essentially of formula Ni a Mo b X c Fe Rest , wherein X is one or more of the elements from the group including Cr, W and V, and wherein a, b, and c are weight percentages, such that 15% by weight≦a≦25% by weight, 0% by weight≦b≦2.8% by weight, 0% by weight≦c≦8% by weight; and, wherein said activation strip has a coercitive force H c of 10 A/cm to 25 A/cm and a remanence B r of at least 1.0 T.