We have investigated the structural, morphological and magnetic properties of a series of -type perovskite compounds synthesized by conventional high-temperature solid state reaction, which strongly depends on the doping level x. The room temperature powder X-ray diffraction data shows the single-phase nature of the sample and confirms the orthorhombic crystal structure with space group. The SEM images show that the grains are dispersed in shape and size. Energy dispersive X-ray analysis (EDAX) confirms the expected stoichiometry of all samples. Upon Co doping on the Mn-site, the lattice parameters, the unit cell volume and the bond angle are slightly reduced from x = 0.05 to x = 0.15. The M − H curves shows saturation magnetizations almost independent of Co contain, confirming that replaces in B sites and, in addition, is in high spin configuration (te). All samples exhibit a single magnetic transition from ferromagnetic to paramagnetic phase, with a large distribution in Curie temperature (260, 220, 180 and 160 K for x = 0, 0.05, 0.10 and 0.15 respectively) and an increase in magnetization M at low temperature. The results are promising for magnetic refrigeration materials and spintronic devices and warrant further investigation.

中文翻译：

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[公式省略](x = 0, 0.05, 0.10 和 0.15) 体系中的铁磁簇玻璃

我们研究了通过传统高温固相反应合成的一系列α型钙钛矿化合物的结构、形态和磁性，这些化合物强烈依赖于掺杂水平x。室温粉末X射线衍射数据显示了样品的单相性质，并证实了具有空间群的斜方晶体结构。 SEM 图像显示晶粒的形状和尺寸是分散的。能量色散 X 射线分析 (EDAX) 证实了所有样品的预期化学计量。在 Mn 位点上掺杂 Co 后，晶格参数、晶胞体积和键角从 x = 0.05 略微减小到 x = 0.15。 M-H 曲线显示饱和磁化强度几乎与 Co 含量无关，证实了 B 位点的取代，并且处于高自旋构型 (te)。所有样品均表现出从铁磁相到顺磁相的单一磁转变，居里温度分布较大（x = 0、0.05、0.10 和 0.15 时分别为 260、220、180 和 160 K），并且低温下磁化强度 M 增加。这些结果对于磁制冷材料和自旋电子器件来说是有希望的，值得进一步研究。