Abstract Solid state rare earth nanoperovskites La(1-x)SmxCrO3 (x = 0 and 0.1) have been synthesized through ball milling method. Powder X-ray diffractogram confirms the effect of Sm3+ magnetic dopant in the formation of polycrystalline, single phase, orthorhombic LaCrO3 with reduced crystallite size. Enhanced antiferromagnetic nature with decrease in the magnetic ordering temperature (TN) has been analyzed using isothermal and field cooling magnetization studies in the temperature range of T = 300 K–5 K. The X-ray photoelectron spectroscopy determines a quantitative analysis of the oxidation states and the corresponding physicochemical interactions of the cations. It also substantiates the observed distortions incurred as an effect of samarium dopants onto the crystal lattice structure. Temperature dependent dielectric analysis for the rare earth orthochromites exhibits negligible dielectric loss, improved dielectric constant and decreased resistance for doped system. The magnitude of resistivity reduces due to the charge localization with the semiconductor to insulator transition temperature at TSI = 11 K. The observed enhancement in La(1-x)SmxCrO3 physical properties is mainly ascribed to the coupling of magnetic moments and CrO6 octahedral distortion induced polarization upon occupancy of relatively smaller ionic radii rare earth atoms in the orthorhombic crystal structure.

中文翻译：

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Sm3+ 掺杂剂在 La(1-x)SmxCrO3 固态纳米钙钛矿形成中的作用——与其增强物理性质的相关性

摘要 通过球磨法合成了固态稀土纳米钙钛矿La(1-x)SmxCrO3 (x = 0 and 0.1)。粉末 X 射线衍射图证实了 Sm3+ 磁性掺杂剂在形成多晶、单相、斜方晶 LaCrO3 并具有减小的微晶尺寸中的作用。在 T = 300 K–5 K 的温度范围内使用等温和场冷却磁化研究分析了随着磁有序温度 (TN) 降低而增强的反铁磁性质。 X 射线光电子能谱确定了氧化态的定量分析以及相应的阳离子物理化学相互作用。它还证实了由于钐掺杂剂对晶格结构的影响而引起的观察到的扭曲。稀土正铬铁矿的温度相关介电分析显示出可忽略不计的介电损耗、提高的介电常数和降低的掺杂系统电阻。由于 TSI = 11 K 时半导体到绝缘体转变温度的电荷局部化，电阻率的大小降低。观察到的 La(1-x)SmxCrO3 物理性质的增强主要归因于磁矩和 CrO6 八面体畸变的耦合在正交晶体结构中占据相对较小离子半径稀土原子时的极化。