Preparation and Piezomagnetic Effect of FeSiB Amorphous Powders /IIR Composite Film

Soft magnetic composite films were prepared with butyl rubber as the base and Fe78Si9B13 amorphous powders for magnetic reinforcement, and its piezomagnetic effect was also tested. The results showed that the composite film had excellent piezomagnetic effect under low frequency; the impedance of composite films decreased with the higher frequency and the bigger compressive stress; the rangeability of impedance increased with the bigger compressive stress, but decreased with the higher frequency. The piezomagnetic effect of composite films was theoretically analyzed with resistance and capacitance in series model and the conclusions were consistent with the experimental results.