The morphology, crystal structure, and thermal and magnetic properties of BaFe_11.7In_0.3O₁₉ compound have been investigated. As a result of the structure investigations performed by x-ray diffraction method, it was determined that the crystal structure of this compound has hexagonal symmetry with P6₃mmc space symmetry at normal condition and room temperature. Temperature dependence of specific magnetic moment of BaFe_11.9In_0.1O₁₉ compound has been established using magnetometry method. It was determined that ferrimagnetic-paramagnetic phase transition occurs at T_C ~ 410 °C temperature. Ferrimagnetic-paramagnetic phase transition was studied from DSC spectrum and thermodynamical parameters of phase transition were determined. Thermophysical studies on the BaFe_11.9In_0.3O₁₉ compound have shown that thermal transitions occur by a complex mechanism. There were decomposition parts determined from the kinetics of DSC spectra: T ≤ 50 °C rapid decomposition, T ≤ 430 °C slow decomposition, and T ≤ 830 °C rapid decomposition parts.

中文翻译：

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BaFe 11.7在0.3 O 19化合物中的铁磁-顺磁相变

研究了BaFe _11.7 In _0.3 O ₁₉化合物的形貌，晶体结构以及热磁性能。通过X射线衍射法进行的结构研究的结果，确定该化合物的晶体结构在正常条件和室温下具有P6 ₃ mmc空间对称的六边形对称性。使用磁力法确定了BaFe _11.9 In _0.1 O ₁₉化合物的比磁矩与温度的关系。确定在T _C发生亚铁磁性-顺磁性相变 温度约为410°C。通过DSC谱研究了亚铁磁性-顺磁性相变，并确定了相变的热力学参数。BaFe _11.9 In _0.3 O ₁₉化合物的热物理研究表明，热转变是通过复杂的机理发生的。有来自DSC谱的动力学来确定分解部分：Ť  ≤50℃迅速分解，Ť  ≤430℃缓慢分解，和Ť  ≤830℃迅速分解的部件。