Abstract
Three-phase magnetoelectric (ME) laminate composites made of high-permeability (μ) MnZnFe2O4, magnetostrictive Tb1−xDyxFe2−y, and piezoelectric Pb(Zr,Ti)O3 layers and operated in longitudinal magnetization and transverse polarization (L-T) bending modes have been studied. High-μ MnZnFe2O4 layers act as flux concentrators. This results in increased apparent piezomagnetic coefficients in the magnetostrictive Tb1−xDyxFe2−y layer and consequently larger induced voltages across the piezoelectric Pb(Zr,Ti)O3 layers. We find the enhanced ME field coefficients of up to 8 times for longitudinal magnetization mode, and up to 28 times for transverse magnetization mode, under small dc magnetic field bias.
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