Zinc ferrite (ZnFe₂O₄) nanoparticles were prepared by chemical co-precipitation method. Structural characterization was performed using X-ray diffraction (XRD) and transmission electron microscopy (TEM). Formation of spinel phase was confirmed from XRD studies. Crystallite size and lattice constant of the prepared sample were calculated. TEM images reveal spherical-shaped particles with nanosized distribution. Room temperature magnetic hysteresis loop was recorded using vibrating sample magnetometer (VSM). The magnetization loops exhibit a very narrow loop and behave like superparamagnetic nature. Using the Langevin function, the magnetic behaviour of the prepared nanoparticles was investigated. From the curve fitting, saturation magnetization and reduced magnetization were determined. As-prepared sample was further annealed at three different temperatures namely 800 °C, 1000 °C, and 1200 °C for 2-h duration. The effects of annealing on the structural and magnetic properties were further investigated using XRD and VSM. The observed results on the magnetic characteristics of ZnFe₂O₄ and applicability of the Langevin function are being discussed.

铁酸锌（ZnFe ₂ O ₄通过化学共沉淀法制备纳米粒子。使用X射线衍射（XRD）和透射电子显微镜（TEM）进行结构表征。X射线衍射研究证实了尖晶石相的形成。计算所制备样品的微晶尺寸和晶格常数。TEM图像显示具有纳米级分布的球形颗粒。使用振动样品磁力计（VSM）记录室温磁滞回线。磁化回路显示出非常窄的回路，并且表现得像超顺磁性一样。使用Langevin函数，研究了制备的纳米颗粒的磁行为。从曲线拟合确定饱和磁化强度和还原磁化强度。将准备好的样品在三种不同的温度（即800°C，1000°C和1200°C）下进一步退火2小时。使用XRD和VSM进一步研究了退火对结构和磁性的影响。ZnFe的磁特性的观察结果₂ O ₄和Langevin函数的适用性正在讨论中。