Herein, detailed studies of structural, electrical, and magnetic characteristics of a double perovskite lanthanum iron manganate (La₂FeMnO₆) are reported. From the Rietveld analysis of X-ray diffraction data and pattern, the orthorhombic structure of the compound is determined. The least-squares refined lattice parameters of the compound are: a = 5.5370 Å, b = 7.7988 Å, and c = 5.5069 Å. The frequency–temperature dependence of the dielectric parameters is explained by the Maxwell–Wagner model to provide the polarization mechanism. Analysis of temperature dependence of impedance and modulus data of different frequency has shown the contributions of grains and grain boundaries in the electrical characteristics of the material. This analysis also shows the semiconductor characteristics, through a negative temperature coefficient of resistance nature. Based on both impedance and modulus spectroscopy, the dielectric relaxation process is found to be of a non-Debye type. The study of scaling behavior of impedance and modulus data suggests that relaxation phenomena are nearly independent of temperature. Detailed analysis of the frequency dependence of conductivity data of different temperatures using the Jonscher's power law has shown the existence of different types of conduction mechanisms in the material. The nature of the current–voltage (I–V) curves suggests that the material behaves as a semiconductor diode type to be used for the rectifying purpose. The conduction mechanism follows the space charge-limited conduction (SCLC) process which is obtained from leakage current analysis. The study of magnetic hysteresis of the material suggests that the material exhibits soft ferromagnetic ordering.

中文翻译：

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双钙钛矿陶瓷的结构、电学和磁学特性研究：La2FeMnO6

在此，报告了对双钙钛矿锰酸镧铁 (La ₂ FeMnO ₆ )的结构、电学和磁学特性的详细研究。根据 X 射线衍射数据和图案的 Rietveld 分析，确定了化合物的正交结构。化合物的最小二乘精化晶格参数为：a  = 5.5370 Å，b  = 7.7988 Å，c = 5.5069 埃。Maxwell-Wagner 模型解释了介电参数的频率-温度依赖性，以提供极化机制。对不同频率的阻抗和模量数据的温度依赖性分析表明，晶粒和晶界对材料电特性的贡献。这种分析也显示了半导体特性，通过电阻性质的负温度系数。基于阻抗谱和模量谱，发现介电弛豫过程是非德拜类型的。阻抗和模量数据缩放行为的研究表明，弛豫现象几乎与温度无关。使用 Jonscher' 详细分析不同温度下电导率数据的频率相关性 s幂律表明材料中存在不同类型的传导机制。电流-电压的性质（I – V ) 曲线表明该材料表现为用于整流目的的半导体二极管类型。传导机制遵循从泄漏电流分析中获得的空间电荷限制传导 (SCLC) 过程。对材料磁滞的研究表明该材料表现出软铁磁有序。