Abstract The structural, magnetic and magnetocaloric properties are investigated in details for the GdFeO3-type Pr0.5Eu0.1Sr0.4MnO3 and Pr0.5Er0.1Sr0.4MnO3 manganites (oP20, space group Pnma, N 62). Landau analysis, Banerjee’s criteria, and universal behaviour are studied to assess magnetic ordering in the samples. These methods reveal the occurrence of a second-order phase transition and the short-range interactions in the vicinity of Curie temperatures. The maximum of the magnetic entropy change ΔSM (field change of 5 T) is found to increase from 4.47 J/kg.K at TC = 279.9 ± 1 K to 4.86 J/kg.K at TC = 188.5 ± 1 K for Pr0.5Eu0.1Sr0.4MnO3 and Pr0.5Er0.1Sr0.4MnO3, respectively with corresponding relative cooling power (RCP) 264.8 J/kg to 270.9 J/kg.

中文翻译：

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Pr0.5 RE0.1Sr0.4MnO3（RE=Eu 和 Er）的磁热特性的结构、磁场和场依赖性

摘要 详细研究了GdFeO3 型Pr0.5Eu0.1Sr0.4MnO3 和Pr0.5Er0.1Sr0.4MnO3 锰酸盐(oP20，空间群Pnma，N 62) 的结构、磁性和磁热性能。研究 Landau 分析、Banerjee 标准和通用行为以评估样品中的磁性排序。这些方法揭示了居里温度附近发生二阶相变和短程相互作用。发现磁熵变的最大值 ΔSM（5 T 的场变化）从 TC = 279.9 ± 1 K 时的 4.47 J/kg.K 增加到 Pr0 时 TC = 188.5 ± 1 K 时的 4.86 J/kg.K。 5Eu0.1Sr0.4MnO3 和 Pr0.5Er0.1Sr0.4MnO3 分别具有相应的相对冷却功率 (RCP) 264.8 J/kg 至 270.9 J/kg。