Abstract
Composite structure materials were potential sensing elements for magnetic sensors due to Giant magnetoimpedance (GMI) effect. Two kinds of composite wires with different magnetic/non-magnetic structures were fabricated by using electroless deposition methods and the magnetoimpedance properties were investigated. The maximum GMI ratio of 114% was acquired at 60 MHz in the composite wires with a ferromagnetic core, whereas, 116% of maximum GMI ratio was found in the composite wires with a conductive core at low frequency of 600 kHz. These results exhibit that the GMI ratio reaches the maximum when magnetoresistance ratio ΔR/R and magnetoinductance ratio ΔX/X make the comparative contributions to the total magnetoimpedance (MI). The obvious GMI effect obtained in the composite wires with conductive core frequency may provide a candidate for applications in magnetic sensors, especially at low frequencies.
Highlights
The giant magnetoimpedance (GMI) effect was firstly observed in Co-based amorphous wires by Mohri et al in 1992 [1]
It was found that GMI origins from classical electrodynamics, which relates to inductive effect, skin effect and ferromagnetic resonance
The maximum MI ratio of 114% was achieved in composite wires with ferromagnetic core (CWFC) at 60 MHz
Summary
The giant magnetoimpedance (GMI) effect was firstly observed in Co-based amorphous wires by Mohri et al in 1992 [1]. Effect in Composite Wires with Different Core Layer”, Nano-Micro Lett. Many researchers have investigated GMI effect in different soft magnetic materials including homogeneous and composite materials [2,3,4,5,6].
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