利用弹性力学模型,推导了低频下磁致伸缩-压电双层复合材料中磁电电压系数的表达式,计算了Tb1-xDyxFe2y-BaTiO3层状复合材料中的横向磁电耦合.采用溶胶-凝胶法制备1.0％(摩尔分数)Mn掺杂BaTiO3(BaTb9Mn0.01O3-δ)压电陶瓷片.将Mn掺杂BaTiO3与Tb1-xDyxFe2-y胶合制成双层和三层复合材料,研究了复合材料在低频下的横向磁电效应.XRD和DSC分析结果表明,室温下Mn掺杂BaTiO3保持了其四方钙钛矿结构,降低了BaTiO3的居里点和相变潜热.在约33 kA/m偏置磁场下,Tb.xDyx Fe2y-BaTi0.99M n00.01O3+δ和Tb1-xDyx Fe2-y-BaTi0.9M n00.01O3+δ-Tb1 xDyxFe2-y的横向磁电耦合峰值分别为529.4 mV/A和1659.5 mV/A,分别是Tb1-xDyx Fe2y-BaTiO3和Tb1-x DyxFe2y-BaTiO3-Tb1-xDyxFe2-y的1.48和1.45倍.三层复合材料的横向磁电电压系数约是同类双层的3倍多.
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