Abstract Rare-earth ions substitution into spinel nanoscale structure can alter its properties. So, this study delineates the microstructure-property relationship due to the extraordinary role of doping erbium in inverse zinc-cobalt ferrite nanoparticles (E-ZCFNs). The studied compounds were synthesized via the citrates sol-gel auto-combustion method and the effect of varying erbium concentration on their optical, mechanical, and magnetic properties has been evaluated. The microstructure of the E-ZCFNs compounds indicates that the spinel structure phase and orthoferrite phase can coexist in the compounds with erbium ions content ≈ 0.21. The compounds doped with erbium ions have better mechanical and microstructural properties at γ ≤ 0.14. The investigated compounds have low average particles size (12.58 - 17.35) nm and high Curie temperature (695 and 723) K. Our study finds that upon doping substitution, decreasing both the molar magnetic susceptibility and the effective magnetic moment and their magnitudes are dependent on the cationic distances and cations distribution in the studied compounds. The E-ZCFNs compounds exhibit a distinctive optical behavior, as they possess two absorption peaks in the Uv range and two values for both the optical energy gap and the refractive index.

中文翻译：

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稀土离子是影响 ErγZn0.2Co0.8Fe2-γO4 纳米粒子磁性、光谱和弹性的关键因素

摘要 稀土离子取代尖晶石纳米结构可以改变其性质。因此，本研究描绘了由于掺杂铒在反向锌钴铁氧体纳米粒子 (E-ZCFNs) 中的非凡作用而产生的微观结构-性能关系。所研究的化合物是通过柠檬酸盐溶胶-凝胶自燃法合成的，并评估了不同铒浓度对其光学、机械和磁性能的影响。E-ZCFNs化合物的微观结构表明尖晶石结构相和正铁素体相可以共存于铒离子含量≈0.21的化合物中。掺铒离子的化合物在γ≤0.14时具有更好的机械和微观结构性能。研究的化合物具有低平均粒径 (12.58 - 17. 35) nm 和高居里温度 (695 和 723) K。我们的研究发现，在掺杂取代后，降低摩尔磁化率和有效磁矩及其大小取决于所研究化合物中的阳离子距离和阳离子分布。E-ZCFNs 化合物表现出独特的光学行为，因为它们在 Uv 范围内具有两个吸收峰以及两个光学能隙和折射率值。