Patent ID: 7852215

Claim:
A magnetic tag formed by at least two components based on a magnetic microwire, comprising: a first component comprises a first array of soft magnetic microwire segments with a bistable magnetic behavior, said segments arranged in a substantially aligned manner in a direction parallel to the axial direction of the microwire, and a second component comprises a second array of hard magnetic microwire segments, said hard magnetic microwire segments being arranged equidistantly from each other and substantially aligned in a direction parallel to that of the first component, wherein the magnetic tag is selectively switched between a deactivated state having a first magnetic behavior and an activated state having a different second magnetic behavior, and wherein a single soft magnetic microwire is subjected to localized heat treatments exceeding crystallization temperature of the soft magnetic microwire to obtain the hard magnetic microwire segments alternated with the soft magnetic microwire segments, wherein when the magnetic tag is in the activated state, the magnetic tag is configured to respond to a magnetic field value that is greater than a critical field of a bistable hysteresis cycle associated with the soft magnetic microwire segments for detection by an induction system.