The magnetoelectric effects of Terfenol-D/PZT/terfenol-D laminated structures

Magnetoelectric (ME) laminated materials, especially laminate ME composites made by combining magnetostrictive and piezoelectric layers, exhibit excellent ME effect, and meet the demands of practical application for sensors, transducers etc. In laminate ME composites, the ME effect is derived from the coupling between a magnetostrictive effect in the magnetostrictive layers and a piezoelectric effect in the piezoelectric layers. Laminated Magnetoelectric material of Terfenol-D/PZT/Terfenol-D (MPM) can be used as a type of magnetoelectric harvester. This paper investigates the magnetoelectric effects of laminated piezomagnetic/piezoelectric structures by means of experiments. Applying a proper biasing magnetic field and a drive magnetic field of proper frequency the laminated structures exert the better magnetoelectric effects. It can be found that in a bias magnetic field of 300-400 Oe and an alternating magnetic field of 1 Oe, the peak of magnetoelectric voltage conversion coefficient of resonant frequency is 613.7mV/cm.Oe for the laminated structure used in the test.