Frequency behaviour of Co-based amorphous wire MI-element

This study presents magnetoimpedance (MI) effect of Co-based amorphous wire investigated at driving frequency range f [50 Hz – 5 MHz]. The XRD pattern and EDX analysis confirmed amorphous structure and the main element content of CoFeSiB alloy. The critical frequency of about 7 kHz was observed as the point with the initial increase of magnetoimpedance. A maximum MI-ratio [Z(0) - Z(Hmax)] / Z(Hmax) of 334 % is attained at driving frequency of 900 kHz@ Hmax 4.63 kA/m