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Effect of magnetic structure on giant magneto-impedance in Co-rich amorphous alloys
Ist Teil von
Journal of magnetism and magnetic materials, 1996-05, Vol.157-158, p.137-140
Ort / Verlag
Elsevier B.V
Erscheinungsjahr
1996
Quelle
Elsevier Journal Backfiles on ScienceDirect (DFG Nationallizenzen)
Beschreibungen/Notizen
We present a review of the giant magneto-impedance (GMI) in Co-rich amorphous wires and films, in which effects with sensitivity up to 100 and 8%/Oe, respectively, have been reported even for tiny samples. GMI, a side-effect of the skin effect, depends considerably upon the particular magnetic structure and frequency range. Considering the different magnetic anisotropies (circumferential or helical in a wire, and transverse in a film), various types of GMI characteristics can be obtained: having a maximum or minimum at zero external field, without a hysteresis or exhibiting a sharp bistable hysteresis, symmetrical or asymmetrical with respect to the field. This suggests great technological potential of GMI in a wide range of sensor applications.