(Ni_(0.8)Zn_(0.2)Fe_2O_4)_(epoxy)-PZT双层膜中的磁电效应

Magnetoelectric effect in bilayers of (Ni_(0.8)Zn_(0.2)Fe_2O_4)_(epoxy)-PZT

讨论了Ni0·8Zn0·2Fe2O4(NZFO)与锆钛酸铅(PZT)的双层膜结构样品的磁电(ME)效应.NZFO粉料由溶胶-凝胶法制成,再经900℃热压,并高温烧结.在该双层膜中测量到了很强的磁电相互作用.发现横向的磁电效应比纵向效应大一个数量级,并且随NZFO烧结温度的提高而增加.当烧结温度从950℃上升到1380℃时,横向ME电压系数(αE)的最大值变化范围为25·6mV Am-2≤αE≤199·6mV Am-2.理论分析显示NZFO-PZT双层膜样品中ME效应源于NZFO与PZT之间相对良好的磁电耦合.

In this paper we discuss the magnetoelectric （ME） effect in bilayers of Nickle Zinc ferrite （NZFO） and lead zirocnate titanate （PZT）. The powder of NZFO was prepared by sol-gel technique, then hot-pressed at 900℃ , and sintered at high temperatures. In these bilayers we measured strong magnetoelectric interaction and observed that the transverse ME effect was higher than the longitudinal effect by one order of magnitude, and the ME effect tended to be stronger as the sintering temperature of NZFO increased. When the sintering temperature was increased from 950℃ to 1380℃, the maximum voltage coefficient of transverse ME effect could change in the range of 25.6 mV Am^-2≤ αE ≤199.6mV Am^-2. Theoretical analysis shows that the ME effect observed in these samples origins from a good magnetoelectric coupling between NZFO and PZT.