The Co_0.5Ni_0.5Ce_xSm_yFe_2-x-yO₄ (CNCSF) XRD pattern revealed the purity of the samples without any secondary phase. The crystallite size CNCSF are in nano range. Further, the calculated lattice parameter of CNCSF are found to increasing with the RE content. From SEM micrographs surface morphology and the microstructure of the CNCSF was studied. The porous nature of the samples is revealed by SEM, which will aid in increasing their sensing response. Energy dispersive X-ray spectroscopy (EDS) patterns have confirmed the stoichiometric presence of Co²⁺ Ni²⁺, Ce³⁺, Sm³⁺ and Fe³⁺, those are used to prepare the CNCSF. The dielectric behaviour is similar to that of conventional spinel ferrite structures, in that the dielectric constant is highest at low frequencies and decreases at higher frequencies due to electron hopping, resulting in dielectric dispersion. Only one semicircle is seen in each Cole-Cole plot, which has uncovered that the contribution to conductivity is predominantly from the grain boundaries. At room temperature, the gas sensing responses of CNCSF thin films were investigated. For liquified petroleum gas (LPG), the gas sensing characteristics of the prepared thin films were investigated. At room temperature, the x = 0.03 thin films showed excellent sensitivity to liquified petroleum gas. The sensing response and recovery time of all of the thin films that had been prepared were reported. The sensing response of x = 0.03 thin films was highly stable over a period of 60 days on exposure to LPG (1000 PPM_v), according to the stability analysis. The sample thin film with x = 0.03 can be utilized in gas sensor technology, particularly for the detection of LPG at room temperature, due to its increased sensitivity, quick response and recovery times, and stability.

Co _0.5 Ni _0.5 Ce _x Sm _y Fe _2-xy O ₄ (CNCSF) XRD 图谱揭示了样品的纯度，没有任何第二相。CNCSF 的微晶尺寸在纳米范围内。此外，发现计算的 CNCF 晶格参数随着稀土含量的增加而增加。从SEM显微照片表面形貌和CNCSF的微观结构进行了研究。SEM 揭示了样品的多孔性质，这将有助于增加它们的传感响应。能量色散 X 射线光谱 (EDS) 模式已证实 Co ²⁺ Ni ²⁺、Ce ³⁺、Sm ³⁺和 Fe的化学计量存在³⁺，那些用于准备 CNCF。介电特性类似于传统尖晶石铁氧体结构的介电常数，在低频时介电常数最高，在高频时由于电子跳跃而降低，从而导致介电色散。在每个 Cole-Cole 图中只看到一个半圆，这表明对电导率的贡献主要来自晶界。在室温下，研究了 CNCSF 薄膜的气敏响应。对于液化石油气（LPG），研究了制备的薄膜的气敏特性。在室温下，x = 0.03 的薄膜对液化石油气表现出极好的敏感性。报告了所有已制备薄膜的传感响应和恢复时间。_v )，根据稳定性分析。x = 0.03 的样品薄膜可用于气体传感器技术，特别是在室温下检测 LPG，因为它具有更高的灵敏度、快速的响应和恢复时间以及稳定性。