Abstract Magnetoelectric composite of particular composition (0.5)PbZr0.52Ti0.48O3+(0.5)CoFe2O4 was synthesized by citrate–sol–gel method. Rietveld refinement of X-ray diffraction (XRD) pattern confirmed the presence of cubic spinel structure for CoFe2O4 and the coexistence of tetragonal along with a rhombohedral perovskite structure for PbZr0.52Ti0.48O3 in the prepared sample. Whereas, scanning electron micrograph (SEM) showed dense and homogeneous distribution of constituent phases. Temperature dependent dielectric measurements showed an abnormal frequency dependent behavior in the prepared composition, which is typically a characteristic of relaxor type materials. The observed behavior is explained in terms of structural disorders which give rise to alteration in the octahedron configuration in the PbZr0.52Ti0.48O3 phase that could promote the formation of the polar regions, which changes the dielectric properties of the prepared sample. Impedance spectroscopy was employed to understand the conduction mechanism which is found to be governed by small polaron hopping (SPH) mechanism. Moreover, it was found that the activations energies deduced from the conduction and relaxation process of constituent phases were comparable to each other. These results confirm that electric/dielectric properties and relaxation phenomenon are related to the similar origin.

中文翻译：

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弛豫型铁电/亚铁磁磁电 (0.5)PbZr 0.52 Ti 0.48 O 3 +(0.5)CoFe 2 O 4 复合材料中的复杂介电和阻抗分析

摘要 采用柠檬酸盐-溶胶-凝胶法合成了特定成分(0.5)PbZr0.52Ti0.48O3+(0.5)CoFe2O4 的磁电复合材料。X 射线衍射 (XRD) 图案的 Rietveld 细化证实了 CoFe2O4 的立方尖晶石结构的存在以及 PbZr0.52Ti0.48O3 的四方晶系与菱面体钙钛矿结构的共存。而扫描电子显微照片 (SEM) 显示组成相的密集和均匀分布。温度相关的介电测量显示所制备的组合物中异常的频率相关行为，这通常是弛豫型材料的特征。观察到的行为是根据结构紊乱来解释的，结构紊乱导致 PbZr0.52Ti0 中八面体构型的改变。48O3 相可以促进极性区域的形成，从而改变所制备样品的介电性能。阻抗谱被用来了解传导机制，该机制被发现受小极化子跳跃 (SPH) 机制控制。此外，发现从组成相的传导和弛豫过程推导出的活化能彼此相当。这些结果证实了电/介电特性和弛豫现象与相似的起源有关。发现由组成相的传导和弛豫过程推导出的活化能彼此相当。这些结果证实了电/介电特性和弛豫现象与相似的起源有关。发现由组成相的传导和弛豫过程推导出的活化能彼此相当。这些结果证实了电/介电特性和弛豫现象与相似的起源有关。