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Identification tags using amorphous wire

  • US 5,831,532 A
  • Filed: 08/12/1997
  • Issued: 11/03/1998
  • Est. Priority Date: 06/29/1995
  • Status: Expired due to Term
First Claim
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1. An electronic article surveillance device for interrogation in an oscillatory magnetic field of period T, said device comprising a single piece of amorphous wire, said wire having domains within the inner core of said wire oriented along a direction parallel to the axis of said wire, said wire having length L and an inner core domain wall velocity, V, such that:

  • 
    
    space="preserve" listing-type="equation">L≈

    (VT)/2.

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