| 摘要 |
Magnetic devices are disclosed which include an article comprising a substrate (4) and a thin coating of a magnetic material (3), characterised in that: (a) said substrate (4) is a flexible, laminar material; (b) said magnetic material (3) is an amorphous metal glass of high intrinsic magnetic permeability, with low or substantially zero magnetostriction, and with low coercivity; and (c) said thin coating of a magnetic material (3) is not greater than 6 microns in thickness. This article can be used as, or to make, an antipilferage tag or marker. Deactivation materials and configurations (6;9;11;12;13) are also disclosed, as well as techniques, in particular sputtering, for producing such a tag. |
