Abstract The magnetic, dielectric, and magnetoelectric (ME) properties of particulate composites containing lead-free piezoelectric 0.97[0.67BiFeO3-0.33BaTiO3]-0.03Bi(Zn0.5Ti0.5) O3 (BF33BT-3BZT) and magnetostrictive CoFe2O4 (CFO); (100-x)[BF33BT-3BZT]-xCFO, x = 13, 25, 37, 47 mol%; have been investigated. The pure ferroelectric BF33BT-3BZT shows a non-dispersive and sharp phase transition, while the composites exhibit relaxor behavior which is described by Vogel - Fulcher law. The ME voltage coefficient is studied as a complex quantity and its dependence on magnetic field is discussed within the framework of dynamic magnetostriction. The composite with x = 37 shows the highest ME voltage coefficient of 5.7 mV/cm.Oe. The results show that, compared to cobalt ferrite, the composite of BF33BT-3BZT with nickel ferrite produces larger ME voltage at a lower magnetic field, confirming that the magnetic field dependence of magnetostriction has a crucial role on the ME properties of the studied multiferroic composites.

中文翻译：

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(BiBa)(FeTiZn)O3/CoFe2O4无铅颗粒复合材料的介电和磁电性能

摘要 含有无铅压电材料 0.97[0.67BiFeO3-0.33BaTiO3]-0.03Bi(Zn0.5Ti0.5)O3 (BF33BT-3BZT) 和磁致伸缩 CoFe2O4 (CFO) 的颗粒复合材料的磁、介电和磁电 (ME) 性能; (100-x)[BF33BT-3BZT]-xCFO，x = 13、25、37、47 mol%；已被调查。纯铁电体 BF33BT-3BZT 表现出非色散和急剧的相变，而复合材料则表现出 Vogel-Fulcher 定律所描述的弛豫行为。ME电压系数作为一个复数进行研究，并在动态磁致伸缩的框架内讨论了它对磁场的依赖性。x = 37 的复合材料显示最高的 ME 电压系数为 5.7 mV/cm.Oe。结果表明，与铁氧体钴相比，