Field Directional Dependences of Magnetoelectric Behaviors in Magnetostrictive/Piezoelectric Laminate Composites

The field directional dependence of magnetoelectric (ME) behaviors in rectangular-shaped Terfenol-D and Pb(Zr,Ti)O₃ laminated composites are investigated. In experiments, the DC bias field is applied along either the length or width direction of the composites respectively superimposed with a parallel or vertical AC magnetic filed. It demonstrates that: 1) the ME voltage coefficients (at 1 kHz) while the AC and the DC fields are parallel are higher than that while the fields are perpendicular; 2) the ME voltage coefficients while DC field is along the oriented direction of Terfenol-D are larger than that while DC field is perpendicular to the oriented direction; 3) the phase variation of the ME voltage coefficients is also related to the field directions; 4) in the cases of AC and DC fields perpendicular to each other, the ME voltage coefficient spectra show an additional peak near the bending resonance peak.