Effect of Dimension Control of Piezoelectric Layer on the Performance of Magnetoelectric Laminate Composite

초록

Laminate composites composed of 0.95Pb(Zr0.52Ti0.48)O-3-0.05Pb(Mn1/3Sb2/3)O-3 piezoelectric ceramic and Fe-Si-B based magnetostrictive amorphous alloy are fabricated, and the effect of control of the areal dimensions and the thickness of the piezoelectric layer on the magnetoelectric(ME) properties of the laminate composites is studied. As the aspect ratio of the piezoelectric layer and the magnetostrictive layer increases, the maximum value of the ME voltage coefficient(alpha(ME)) increases and the intensity of the DC magnetic field at which the maximum alpha(ME) value appears decreases. Moreover, as the thickness of the piezoelectric layer decreases, alpha(ME) tends to increase. The ME composites exhibit alpha(ME) values higher than 1 Vcm(-1) Oe(-1) even at the non-resonance frequency of 1 kHz. This study shows that, apart from the inherent characteristics of the piezoelectric composition, small thicknesses and high aspect ratios of the piezoelectric layer are important dimensional determinants for achieving high ME performance of the piezoelectric-magnetostrictive laminate composite.X

키워드