| 摘要 |
<p>A harmonic-type electronic article surveillance marker (20) includes a thin, elongated active element (21) and flux concentrators (22, 23) provided at the ends (24, 25) of the active element. The flux concentrators (22, 23) have magnetic anisotropies that are oriented perpendicular to the length of the active element (21). The orientation of the magnetic anisotropies in the anisotropy field of the flux concentrators (22, 23) stabilizes the switching threshold of the active element (21). The switching threshold level can be controlled by varying parameters such as the angle of the magnetic anisotropies relative to the length of the active element (21), the strength of the anisotropy field of the magnetic anisotropies, and the geometry of the active element and the flux concentrators (22, 23).</p> |
