Abstract In the present work, the influence of different sintering atmospheres and temperatures on physical properties of the Cu0.5Zn0.5Fe2O4 nanoparticles including the redistribution of Zn2+ and Fe3+ ions, the oxidation of Fe atoms in the lattice, crystallite sizes, IR bands, saturation magnetization and magnetic core sizes have been investigated. The fitting of XRD patterns by using Fullprof program and also FT-IR measurement show the formation of a cubic structure with no presence of impurity phase for all the samples. The unit cell parameter of the samples sintered at the air- and inert-ambient atmospheres trend to decrease with sintering temperature, but for the samples sintered under carbon monoxide-ambient atmosphere increase. The magnetization curves versus the applied magnetic field, indicate different behaviour for the samples sintered at 700 °C with the respect to the samples sintered at 300 °C. Also, the saturation magnetization increases with the sintering temperature and reach a maximum 61.68 emu/g in the sample sintered under reducing atmosphere at 600 °C. The magnetic particle size distributions of samples have been calculated by fitting the M–H curves with the size distributed Langevin function. The results obtained from the XRD and FTIR measurements suggest that the magnetic core size has the dominant effect in variation of the saturation magnetization of the samples.

中文翻译：

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Cu-Zn铁氧体在不同气氛和温度下退火物理性能的比较研究：Cu 0.5 Zn 0.5 Fe 2 O 4 纳米颗粒通过还原气氛的磁增强

摘要 在目前的工作中，不同烧结气氛和温度对 Cu0.5Zn0.5Fe2O4 纳米粒子物理性质的影响，包括 Zn2+ 和 Fe3+ 离子的重新分布、晶格中 Fe 原子的氧化、微晶尺寸、红外波段、饱和度。研究了磁化强度和磁芯尺寸。使用 Fullprof 程序拟合 XRD 图案以及 FT-IR 测量表明，所有样品均形成立方结构，不存在杂质相。在空气和惰性环境气氛下烧结的样品的晶胞参数随着烧结温度的增加而降低，但在一氧化碳环境气氛下烧结的样品的晶胞参数增加。磁化曲线与外加磁场的关系，表示在 700 °C 下烧结的样品与在 300 °C 下烧结的样品的不同行为。此外，饱和磁化强度随着烧结温度的升高而增加，在 600 °C 还原气氛下烧结的样品中，饱和磁化强度达到最大值 61.68 emu/g。通过将 M-H 曲线与尺寸分布的朗之万函数拟合来计算样品的磁性粒度分布。从 XRD 和 FTIR 测量获得的结果表明，磁芯尺寸对样品饱和磁化强度的变化具有主要影响。通过将 M-H 曲线与尺寸分布的朗之万函数拟合来计算样品的磁性粒度分布。从 XRD 和 FTIR 测量获得的结果表明，磁芯尺寸对样品的饱和磁化强度的变化具有主要影响。通过将 M-H 曲线与尺寸分布的朗之万函数拟合来计算样品的磁性粒度分布。从 XRD 和 FTIR 测量获得的结果表明，磁芯尺寸对样品饱和磁化强度的变化具有主要影响。