Studies of the properties of Zn_xFe_{3 – x}O₄ (x = 0, 0.25, 0.5, 0.75, 1.0) magnetic nanoparticles synthesized by a modified hydrothermal method are presented in comparison with the properties of the same nanoparticles stabilized with polyacrylic acid Zn_xFe_{3 – x}O₄@PAA. The structure, size, morphology, and magnetic properties of the samples were studied by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT IR), physical properties measurements (PPMS), and Mössbauer spectroscopy. The synthesized nanoparticles are single-phase, without additional impurities, have a narrow size distribution and are in the superparamagnetic phase. From the (XRD) measurements, it was found that with an increase in the Zn content from x = 0 to x = 1.0, the sizes of the nanoparticles were increasing from 17 to 33 nm. Analysis of the Mössbauer spectroscopy data showed that when doped with Zn ions from x = 0 to x =1.0, the sizes of the nanoparticles were decreasing from 15 to 5 nm. The results of the Mössbauer studies showed that both Zn_xFe_{3 – x}O₄ and Zn_xFe_{3 – x}O₄@PAA has a core/shell type structure in which the core is magnetically ordered, whereas the shell does not have magnetic ordering. Mössbauer studies indicate that the coating of citric acid particles leads to their isolation from each other, reducing or eliminating interactions between particles, reducing the thickness of the paramagnetic shell, and thereby increasing the diameter of the core, which is in a magnetically ordered state.

研究了通过改进的水热法合成的 Zn _x Fe _{3 – x} O ₄ ( x = 0, 0.25, 0.5, 0.75, 1.0) 磁性纳米粒子的性能，并与聚丙烯酸 Zn 稳定的相同纳米粒子的性能进行了比较_x Fe _{3 – x} O ₄ @PAA。通过 X 射线衍射 (XRD)、傅里叶变换红外光谱 (FT IR)、物理性能测量 (PPMS) 和穆斯堡尔光谱研究了样品的结构、尺寸、形貌和磁性能。合成的纳米粒子是单相的，没有额外的杂质，具有窄的尺寸分布并且处于超顺磁相。从（XRD）测量发现，随着Zn含量从x = 0增加到x = 1.0，纳米颗粒的尺寸从17 nm增加到33 nm。穆斯堡尔谱数据分析表明，当Zn离子掺杂量从x = 0到x = 1.0时，纳米粒子的尺寸从15 nm减小到5 nm。穆斯堡尔研究结果表明，Zn _x Fe _{3 – x} O ₄和 Zn _x Fe _{3 – x} O ₄ @PAA 均具有核/壳型结构，其中核是磁性有序的，而壳不具有磁性。订购。穆斯堡尔研究表明，柠檬酸颗粒的涂层导致它们彼此隔离，减少或消除颗粒之间的相互作用，减少顺磁壳的厚度，从而增加处于磁有序状态的核的直径。