Magnetoelectric effect and its frequency response for PZT/ Terfenol-D/epoxy laminate composites

The magnetoelectric composites have important and potential applications in magnetic-electric energy conversion. It is important to study the magnetoelectric coupling properties at high frequency for their applications. In this paper, magnetoelectric laminate composites were prepared by combining 0-3 type magnetostrictive Terfenol-D (Tb_0.30Dy_0.70Fe₂)/epoxy composite and PZT ceramic. The magnetostriction property of the Terfenol-D/epoxy composite was studied. The dependence of flux density, dielectric property and magnetoelectric effect on frequency and magnetic bias were investigated in detail. It is shown that the laminate composite possesses good dynamic magnetoelectric response with a wide frequency range. The magnetoelectric effect of the laminate composite varies evidently with magnetic bias and there exists an optimized magnetic bias. The magnetoelectric effect of the laminate composite achieves a maximum value of 21.2 V/cmOe at the optimized magnetic bias of 630 Oe and resonant frequency of 69.6kHz . These results were discussed in detail and the magnetoelectric coupling mechanism of the composite laminate was analyzed.