Investigation of Magnetic Field Response Features of Multilayer CoFe on Kapton Tape
Abstract
Multilayer magneto-response cells (MMRC)
fabricated on a non-magnetic layer among ferromagnetic [Fe65Co35]5/Cu/[Fe65Co35]5
on a flexible substrate (Kapton tape) have been studied by using electron
microscopy, X-ray diffraction, magnetic and magnetoimpedance measurements. In a
similar cell, these layers have shown previously to have an outstanding
magnetoimpedance (MI) effect performance when the selected growth substrate is
a rigid one. Here, this MMRC produces on the Kapton tape and evaluate during
the using as a magnetic field sensor and the magnetoimpedance characteristics
are analyzed in terms of preparation conditions. For future sensing
applications, this material is a promising candidate for giant magnetoimpedance
effect with the range of low price and relatively high sensitivity features. In
order to observe MI effect, the frequency dependence of impedance measurements
has performed as a function of the applied low magnetic field. The impedance
value of the cells has characterized by using constant 20 mA AC current
source at low frequencies ranges. Double (out of plane measurement) peak
responses have obtained, showing MI ratios up to % 140 and % 55, their
sensitivities are around 30 %/Oe and 17 %/Oe
in the film on Si and Kapton tape, respectively.
Keywords
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