Abstract In this communication, detailed studies of structural, micro-structural, dielectric, electrical (impedance, modulus and conductivity) and magneto-electric characteristics of a chemico-thermally synthesized sample of a double perovskite bismuth calcium iron cerate (BiCaFeCeO6) have been reported. Preliminary structural analysis of room temperature X-ray diffraction data shows orthorhombic structure of the material. The homogeneous distribution of the grains of different dimensions (shape, size, etc) with a small number of voids observed in the scanning electron micrograph suggests the formation of high-density sample. Detailed analysis of dielectric and impedance experimental data, collected at different frequency and temperatures, have provided many important characteristics of the material, such as (a) grains, grain boundaries, and electrode dependent capacitive and impedance parameters, (b) co-relation between the structure, micro-structure and physical properties and (c) the relaxation characteristics of the tested samples. The nature of frequency dependence of AC conductivity of the material obeys the Jonscher’s universal power law. The temperature dependence of conductivity provides the conduction mechanism in the material. Detailed studies of field dependence of electric polarization, magnetization and magneto-electric coefficient at room temperature exhibit the multiferroic characteristics of the material.

中文翻译：

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化学热合成材料的结构、介电、电学和磁学特性：BiCaFeCeO6

摘要 在这篇通讯中，详细研究了双钙钛矿铋酸铁钙 (BiCaFeCeO6) 化学热合成样品的结构、微观结构、介电、电（阻抗、模量和电导率）和磁电特性。 . 室温 X 射线衍射数据的初步结构分析显示材料的正交结构。在扫描电子显微照片中观察到的不同尺寸（形状、尺寸等）晶粒的均匀分布和少量空隙表明形成了高密度样品。在不同频率和温度下收集的介电和阻抗实验数据的详细分析提供了材料的许多重要特性，例如 (a) 晶粒、晶界、和电极相关的电容和阻抗参数，(b) 结构、微观结构和物理特性之间的相互关系以及 (c) 测试样品的弛豫特性。材料的交流电导率的频率依赖性的性质遵循 Jonscher 的通用幂律。电导率的温度依赖性提供了材料中的传导机制。对室温下电极化、磁化和磁电系数的场依赖性的详细研究展示了该材料的多铁性特性。材料的交流电导率的频率依赖性的性质遵循 Jonscher 的通用幂律。电导率的温度依赖性提供了材料中的传导机制。对室温下电极化、磁化和磁电系数的场依赖性的详细研究展示了该材料的多铁性特性。材料的交流电导率的频率依赖性的性质遵循 Jonscher 的通用幂律。电导率的温度依赖性提供了材料中的传导机制。对室温下电极化、磁化和磁电系数的场依赖性的详细研究展示了该材料的多铁性特性。