Abstract In this study, BiFe1-xMnxO3 (BiFeMnO; x from 0 to 0.5) solid solutions were prepared by low temperature sol-gel processing. It was demonstrated that structural, magnetic and morphological properties of BiFeMnO samples are dependent on the chemical composition of the synthesized BiFe1-xMnxO3 solid solutions. The thermal behaviour of the Bi-Fe-Mn-O precursor gels was investigated by thermogravimetric and differential scanning calorimetry (TG-DSC) measurements. From X-ray diffraction (XRD) analysis it was observed that monophasic BiFe1-xMnxO3 samples have formed up to 25 mol% of substitution. The Rietveld analysis showed that the structure of BiFeMnO specimens can be indexed by rhombohedral or orthorhombic unit cell depending on Mn3+ content. Scanning electron microscopy (SEM) was used to investigate samples morphology and revealed, that smaller particles form when Mn3+ is present inside the structure. Moreover, magnetic properties of solid solutions were also investigated, and antiferromagnetism and weak ferromagnetism were observed for the samples.

中文翻译：

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低温溶胶-凝胶合成路线对BiFe1-xMnxO3固溶体形成的再检测

摘要 本研究采用低温溶胶-凝胶法制备BiFe1-xMnxO3 (BiFeMnO; x 0~0.5)固溶体。结果表明，BiFeMnO 样品的结构、磁性和形态特性取决于合成的 BiFe1-xMnxO3 固溶体的化学成分。通过热重和差示扫描量热法 (TG-DSC) 测量研究了 Bi-Fe-Mn-O 前体凝胶的热行为。从 X 射线衍射 (XRD) 分析可以看出，单相 BiFe1-xMnxO3 样品已形成高达 25 mol% 的取代。Rietveld 分析表明，根据 Mn3+ 含量，BiFeMnO 试样的结构可以通过菱形或斜方晶胞进行索引。扫描电子显微镜 (SEM) 用于研究样品形态并揭示，当 Mn3+ 存在于结构内部时，会形成更小的颗粒。此外，还研究了固溶体的磁性，观察到样品具有反铁磁性和弱铁磁性。