Magnetoelectric Properties of Low Temperature Sintered CoFe2O4-(PZN-PZT) Multiferroic Composite Materials

Abstract

CoFe2O4-(PZN-PZT) multiferroic composite ceramics were prepared by low temperature sintering using traditional ceramic method. The influences of mixed mode, PZT shell and composition on structure, magnetic and magnetoelectric coupling properties were studied. XRD and TEM results show that CoFe2O4/PZT core-shell nanos- tructured particles are prepared by the Sol-Gel method. A 10-20 nm thick PZT shell formed on the surface of CoFe2O4 particle. EDS analyses show that low temperature sintering and barrier layer effectively inhibit the elements diffusion of the two phases. SEM images and magnetoelectric property measurement show that PZT shell coated on CoFe2O4 particles and the stirring process improve the magnetic particles content in com-position, match the sintering process perfectly, and improve the magnetoelectric coupling properties effectively. The coated and stirred sample CoFe2O4-(PZN-PZT) with volume ratio of 4:6 which sintered at 1000℃ show maximum magnetoelectric coupling coefficient of (18.3 mV/(cm·Oe)) at 10 kHz.