Magnetoelectric characteristics in three-phase magnetostric-tive/ piezoelectric composites with different high permeability materi-als

The magnetostrictive/piezoelectric laminate composites consisting of Ni, Permendur, Metglas or Terfenol-D as magnetostrictive phase and PVDF, PZT or PMN-PT as piezoelectric phase demonstrate strong magnetoelectric effect due to the product property, which provide effective conversion between electric field energy and magnetic field energy. The superior performances make them potential applications in novel multifunctional devices, such as multiple-state storages, energy harvesting transducers, tunable microwave devices, magnetic field sensors, and transformers. Recently, it has been found that the magnetic permeability for magnetostrictive material directly affects its effective piezomagnetic coefficient and corresponding magnetoelectric effect. Combining traditional magnetostrictive/piezoelectric laminate composites and high permeability materials can significantly enhance the effective permeability, which produce the self-biased ME effect. However, in previous reports, most researchers have focused on the preparation method and testing composite structure consisting of specific high permeability materials, which is lack of comparisons and analysis for composites with different high permeability material. Actually for the practical applications of magnetoelectric composites, it is both physically interesting and technologically important to systematically investigate the ME composites with different high permeability materials. Hence in this study, by bonding three different high permeability materials FeCuNbSiB, FeSiB and CoNiFeSiB into Terfenol-D/PZT laminate, the FeCuNbSiB/Terfenol-D/PZT, FeSiB/Terfenol-D/PZT, and CoNiFeSiB/Terfenol-D/PZT laminate composites are prepared.