Abstract
Magnetoelectric(ME) coupling in multi-ferroic composite designed by (PZT) and ferromagnetic amorphous alloy FeSiB was investigated to apply to small magnetic sensor. Magnetostrictive FeSiB (25-75μm) ribbons rapid solidified were glued on both surfaces of PZT. The magnetostriction of the FeSiB ribbon was about 30 ppm at low magnetic field of 100 Oe, and the value of annealed FeSiB increased. When a driving ac magnetic field H^ of frequency f = 0.07 Hz〜70 kHz and low dc bias magnetic field of 30 Oe were applied along the length by coil about the laminate composites, the ME charge generated across the samples was measured by charge amplifier. The output ME voltage for the FeSiB - PZT laminate composites exhibited large peak at a resonant frequency of 61 kHz〜72 kHz and a maximum V_<ME> was 1.8 V/Oe.
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