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Frequency dependence of giant magnetoimpedance effect in CuBe/CoFeNi plated wire with different types of magnetic anisotropy

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7 Author(s)
Kurlyandskaya, G.V. ; Dpto de Electricidad y Electrónica, Facultad de Ciencias, Universidad del Paı´s Vasco UPV/EHU, Apartado 644, 48080 Bilbao, Spain ; Barandiaran, J.M. ; Munoz, J.L. ; Gutierrez, J.
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A giant magnetoimpedance effect (GMI) has been measured in a CuBe 0.1 mm diameter wire, electroplated with a Co6Fe20Ni74 layer 1 μm thick. Heat treatments after the electrodeposition were performed under the dc or ac field. The GMI has been measured in the frequency range 0.25 to 9 MHz, using ac driving current from 5 to 35 mA. The maximum GMI ratio depends strongly on the heat treatments, the intensity and the frequency of the driving current, reaching the value of 165% for optimal conditions. Results are discussed, taking into account the anisotropy distribution in the magnetic layer induced by the heat treatments under the field and a simple rotation model. © 2000 American Institute of Physics.

Published in:

Journal of Applied Physics  (Volume:87 ,  Issue: 9 )