Dielectric, magnetic and magnetoelectric properties of Ni_(0.5)Zn_(0.5)Fe_2O_4+Pb (Zr_(0.48)Ti_(0.52))O_3 composite ceramics

摘要

Magnetoclectric composite ceramics of spinel ferrite Ni_(0.5)Zn_(0.5)Fe_2O_4 (NZFO) with high magnetic permeability and tetragonal perovskitc Pb (Zr_(0.48)Ti_(0.52))O_3 (PZT) with high piezoelectric constant were synthesized by common solid state reaction method. XRD and SEM showed that high dense composite ceramics without any foreign phases were obtained. The ceramics showed excellent dielectric and magnetic properties, which were stable in a large frequency range. The dielectric peak became wider with the ferrite content in the permittivity spectrum with temperature. With the increase in the ferrite content, the magnetic Curie temperature shifted to higher temperature and closed to that of the pure ferrite. In addition, the magnetoelectric coefficient enhanced as the increase in the ferrite content. The properties of the composite ceramics could be adjusted by the ferrite content. These research results provided a powerful experimental basis for the sensor and transducer in microelectronic and microwave devices.