In this paper, we have investigated the structural and magnetic properties of LaSmZnIrO and LaSmZnCuIrO double perovskites. We have used the conventional solid-state method to synthesize the samples. The room temperature crystal structures of both the samples are monoclinic with P2/n space group. It is evident from the temperature dependent Raman study of the samples that structural transitions occur with progression of temperature from monoclinic (P2/n) to tetragonal (I4/m) to cubic (Fm-3m). The presence of several oxidation states of Ir ions (Ir and Ir) in both samples was confirmed by the X-ray photoemission spectroscopy (XPS) study. The behavior of the temperature dependent magnetization and isothermal magnetization confirms the antiferromagnetic (AFM) nature of the samples at low temperature. This behavior may be due to the interactions between Sm–Sm (or Sm–Ir) or due to the presence of lesser amount of Ir ions compared to Ir ions in the samples.

中文翻译：

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将非立方双钙钛矿的结构和磁性与 Ir5+ 离子相关联

在本文中，我们研究了LaSmZnIrO和LaSmZnCuIrO双钙钛矿的结构和磁性。我们使用传统的固态方法来合成样品。两种样品的室温晶体结构均为单斜晶系，具有P2/n空间群。从样品的温度依赖性拉曼研究可以明显看出，随着温度从单斜晶系 (P2/n) 到四方晶系 (I4/m) 到立方晶系 (Fm-3m) 的变化，会发生结构转变。 X 射线光电子能谱 (XPS) 研究证实了两个样品中存在多种 Ir 离子（Ir 和 Ir）氧化态。温度相关磁化强度和等温磁化强度的行为证实了样品在低温下的反铁磁 (AFM) 性质。这种行为可能是由于 Sm-Sm（或 Sm-Ir）之间的相互作用或由于样品中存在的 Ir 离子数量少于 Ir 离子。