Transverse field annealing process to form E.A.S. marker having

Details Transverse field annealing process to form E.A.S. marker having Transverse field annealing process to form E.A.S. marker having

1998-03-18

1999-07-20

Hofsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specific condition

3405721, 3405722, 340551, G08B 1314

Patent

active

059260955

ABSTRACT:
A marker to be used in an article surveillance system is formed by processing a continuous ribbon of magnetic material having a longitudinal axis. Domains are developed in the magnetic material to produce a wall configuration which includes a plurality of substantially parallel domain walls extending in a wall direction that is canted at least 15.degree. from the longitudinal axis of the continuous ribbon. The continuous ribbon is then further processed to cause the wall configuration of substantially parallel domain walls to remain in a pinned state for values of applied field below a threshold value. The processed continuous ribbon can be cut to produce discrete magnetic elements which exhibit a step change in magnetic flux when the applied field crosses a threshold value.

REFERENCES:
patent: 4660025 (1987-04-01), Humphrey
patent: 4980670 (1990-12-01), Humphrey et al.
patent: 5083112 (1992-01-01), Piotrowski et al.
patent: 5121106 (1992-06-01), Kataria et al.
patent: 5313192 (1994-05-01), Ho et al.
patent: 5554974 (1996-09-01), Brady et al.
patent: 5565849 (1996-10-01), Ho et al.
patent: 5602527 (1997-02-01), Suenaga
patent: 5605768 (1997-02-01), Furukawa et al.
patent: 5790030 (1998-08-01), Lievens et al.
"Anisotropy Pinning of Domain Walls in a Soft Amorphous Magnetic Material", Rudolf Schafter, et al., IEEE Transactions on Magnetics, vol. 27, No. 4, pp. 3678-3684, Jul., 1991.

Affiliated with

Also associated with

Rating

Transverse field annealing process to form E.A.S. marker having does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Transverse field annealing process to form E.A.S. marker having , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transverse field annealing process to form E.A.S. marker having will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1325240