In this contribution, we reported our findings on NdFeO3–PbTiO3 composite system synthesized by conventional solid-state reaction route. The cell parameters, density and bond lengths (Fe-O_I, Fe-O_II) are determined by Rietveld refinement of X-ray diffraction data. Phase purity of the system was further confirmed through Fourier transform infrared (FTIR) and Raman spectroscopy techniques. The FTIR spectra reflected two important absorption bands around 656–505 cm⁻¹ and 486–412 cm⁻¹, corresponding to stretching (ν₁) and bending (ν₂) vibrational modes. The stretching vibrational mode (ν₁) represents the absorbed IR energy in metal oxide (M–O) bonds. If the Raman spectra are related to two different symmetries, this includes the presence of two different phases in the sample. Thus, the phase purity is absent. The blue shift of Raman active mode at 720 cm⁻¹ in pristine sample suggests that the increase in PbTiO₃ concentration enhances the structural distortion in the system. The particle sizes as estimated using SEM micrographs were found to be in the range 147–250 nm. The ferroelectric behavior of NdFeO₃ has been improved drastically with increase in PbTiO₃ concentration. The P-E loops fitted by ferroelectric capacitor model established a good agreement between experimental and simulated data. The thermal properties of the powder samples were analyzed in a wide temperature range (300–900 K). The room temperature dielectric permittivity (ε′) and loss tangent (tanδ) for all the samples were analyzed in a broad frequency range (75 kHz–5 MHz). The behavior of dielectric permittivity in low-frequency region followed Maxwell–Wagner interfacial model, while in the high-frequency region, the composite system exhibited capacitive nature. The Néel temperature of the composite system decreased as compared to that of NdFeO₃. The energy bandgap as determined with the help of Tauc’s plots exhibits a slight decrease for composite samples in respect of pristine NdFeO₃.

在这项贡献中，我们报告了我们通过常规固态反应路线合成的NdFeO3-PbTiO3复合体系的发现。电池参数，密度和键长（Fe-O _I，Fe-O _II）由Rietveld精制X射线衍射数据确定。通过傅里叶变换红外（FTIR）和拉曼光谱技术进一步证实了系统的相纯度。FTIR光谱反射周围656-505厘米的两个重要的吸收带^-1和486-412厘米^-1，对应于拉伸（ν ₁）和弯曲（ν ₂）振动模式。拉伸振动模式（ν ₁）代表在金属氧化物（M-O）键中吸收的IR能量。如果拉曼光谱与两个不同的对称性有关，则这包括样品中存在两个不同的相。因此，不存在相纯度。原始样品中720 cm ^-1的拉曼活性模式的蓝移表明，PbTiO ₃浓度的增加会增强系统的结构变形。使用SEM显微照片估计的粒径在147-250 nm范围内。随着PbTiO ₃含量的增加，NdFeO ₃的铁电性能得到了显着改善。专注。通过铁电电容器模型拟合的PE回路在实验数据和模拟数据之间建立了良好的一致性。在较宽的温度范围（300–900 K）内分析了粉末样品的热性能。在较宽的频率范围（75 kHz-5 MHz）内分析了所有样品的室温介电常数（ε ′）和损耗角正切（tanδ）。低频区域的介电常数行为遵循Maxwell-Wagner界面模型，而在高频区域，复合系统表现出电容性质。与NdFeO ₃相比，复合体系的Néel温度降低了。借助Tauc曲线确定的能带隙对于原始NdFeO ₃而言，对于复合样品表现出略微的下降。