Ferromagnetic element for use in a marker in a magnetomechanical electronic article surveillance system
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United States of America Patent
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Apr 11, 2006
Grant Date -
Oct 7, 2004
app pub date -
Apr 23, 2004
filing date -
Nov 12, 1997
priority date (Note) -
In Force
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Abstract
A ferromagnetic element for use in a marker in a magnetomechanical electronic article surveillance system has improved magnetoresonant properties and/or reduced eddy current losses by virtue of having a fine domain structure having a maximum width of 1.5 times the thickness of the element and oriented transverse to the element axis, and an induced magnetic easy axis substantially perpendicular to the element axis, and having a hysteresis loop that is linear up to a magnetic field substantially equal to a magnetic field that ferromagnetically saturates the ferromagnetic element.
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