Abstract
The magnetoimpedance in amorphous microwires with a nominal composition of Co67Fe4Si14B15 has been investigated. The measurements were carried out with an Agilent 4395A network analyzer in the frequency range from 100 kHz to 60 MHz. The experimental setup for magnetoimpedance measurements and the analysis of the results are presented. Our results show that an optimum frequency exists, where the magnetoimpedance ratio is maximum for all studied frequencies. In this frequency, the amorphous microwire is very sensitive to variations of the dc magnetic field. Therefore, we propose a possible application as a low dc field sensor.
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