Abstract
Lorentz force-piezoelectric coupled magnetoelectric (ME) effect and piezomagnetic-piezoelectric coupled ME effect were compared in PZT/nonmagnetic and PZT/magnetostrictive metal cylindrical layered composites under axial magnetic fields. While only the Lorentz force-piezoelectric ME effect is observed in PZT/brass and PZT/Al cylinders, both ME effects are present in PZT/magnetostrictive Ni cylinder. The ME voltage linear dependence on DC magnetic field and constant −90° ME voltage phase reflect the Lorentz force-piezoelectric ME effect. For the PZT/Ni cylinder under low DC magnetic field, the ME voltages from the two ME effects tend to be anti-phase, and the piezomagnetic-piezoelectric ME voltage is much higher than the Lorentz force-piezoelectric ME voltage. However, under high DC magnetic field, the Lorentz force-piezoelectric ME effect plays a dominant role. These results indicate that the PZT/Ni cylinder is favorable to DC magnetic field detection in wide range.
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