Polycrystalline YFe_1−xMn_xO₃ (x=0, 0.1, 0.2, 0.3, 0.4 and 0.5) samples are prepared via sol-gel method. Structural characterization of these samples is done by x-ray diffraction (XRD) technique and Raman spectroscopic method. Intense peaks in XRD graphs show that the sample is crystalline in nature and Reitveld refined XRD data shows that the samples are formed in single phase. Raman spectroscopic study confirms the structure and phase purity of the samples. Room temperature ⁵⁷Fe Mossbauer studies confirm that Fe ion exists in ferric state. The hyperfine field (B_hf) values are found to decrease with increase in manganese (Mn) concentration. This decrease in B_hf value indicates the increase in antiferromagnetic nature of the samples, which arises due to the weakening of magnetic interactions between the Fe ions. From room temperature leakage current density (J-E) measurements, it is observed that leakage current density increases with increase in Mn doping. Scanning electron micrographs explain the reason of increase in leakage current density based on the micro structure of the samples. The samples are found to exhibit Ohmic conduction mechanism in entire electric field range.

通过溶胶-凝胶法制备多晶YFe _1-x Mn _x O ₃（x = 0、0.1、0.2、0.3、0.4和0.5）样品。这些样品的结构表征是通过X射线衍射（XRD）技术和拉曼光谱法完成的。XRD图中的强烈峰表明样品本质上是晶体，Reitveld精制的XRD数据表明样品是单相形成的。拉曼光谱研究证实了样品的结构和相纯度。室温⁵⁷ Fe Mossbauer研究证实，Fe离子以三价态存在。发现超细场（B _hf）值随锰（Mn）浓度的增加而降低。B _hf的下降值表示样品的反铁磁性质增加，这是由于铁离子之间的磁性相互作用减弱而引起的。从室温泄漏电流密度（JE）测量可以看出，泄漏电流密度随Mn掺杂的增加而增加。扫描电子显微照片基于样品的微观结构解释了泄漏电流密度增加的原因。发现样品在整个电场范围内均表现出欧姆传导机理。