Multiferroic materials have sparked significant interest in the realm of materials science because of their potential impact on various device applications. This study focuses on the synthesis of nanocrystalline La_1−xPr_xFeO₃ (LPFO) materials, where x can be either 0 or 0.5, using a solid-state technique. The aim is to gain insights into their structural, optical, dielectric, and magnetic properties. To confirm the chemical phase of the synthesized materials, X-ray diffractometer and Raman spectroscopy were employed. The outcome of the Rietveld analysis reveals that the LPFO crystallites exhibit orthorhombic symmetry with a Pbnm space group. The functional groups that were present in the LPFO samples were identified using FT-IR spectroscopic analysis. The morphological studies using scanning electron microscope and transmission electron microscope indicate that the synthesized samples exhibit excellent homogeneity with uniformly distributed grains. In order to investigate the dielectric constant (εʹ) and dielectric loss (tan δ) were examined as functions of temperature and frequency. Pr³⁺ dopants had a notable impact on the dielectric characteristics, particularly within the frequency span of 10 kHz–1 MHz and over the temperature variation of 40–160°C. The ambient temperature magnetic properties of the LPFO ferrite materials displayed antiferromagnetic behavior. Ultimately, this research reveals insightful information on the structural, optical, dielectric, and magnetic properties of the synthesized nanocrystalline LPFO materials, shedding light on their potential applications in the multifunctional devices.

中文翻译：

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通过稀土 Pr3+ 掺杂调整 LaFeO3 纳米晶体的多铁特性

多铁材料因其对各种设备应用的潜在影响而引起了材料科学领域的极大兴趣。本研究重点是使用固态技术合成纳米晶La _{1− x} Pr _x FeO ₃ (LPFO) 材料，其中x可以是0 或0.5。目的是深入了解它们的结构、光学、介电和磁性特性。为了确认合成材料的化学相，使用了 X 射线衍射仪和拉曼光谱仪。Rietveld 分析的结果表明，LPFO 微晶表现出具有 Pbnm 空间群的斜方对称性。使用 FT-IR 光谱分析鉴定了 LPFO 样品中存在的官能团。使用扫描电子显微镜和透射电子显微镜进行的形貌研究表明，合成的样品具有良好的均质性，晶粒分布均匀。为了研究介电常数 ( ε ʹ) 和介电损耗 (tan  δ ) 作为温度和频率的函数进行了检查。Pr ³⁺掺杂剂对介电特性有显着影响，特别是在 10 kHz–1 MHz 的频率范围内以及 40–160°C 的温度变化范围内。LPFO 铁氧体材料的环境温度磁特性表现出反铁磁行为。最终，这项研究揭示了合成纳米晶 LPFO 材料的结构、光学、介电和磁性特性的深刻信息，揭示了它们在多功能器件中的潜在应用。