Abstract In this work, Neodymium substituted Gadolinium-cobalt ferrite nanoparticles were synthesized by hydrothermal method. The significant role of doping both the Nd3+ and Gd3+ ions to cobalt ferrite in manipulating the cation distribution and further in influencing structural and magnetic properties was experimentally studied and reported. The influence of Nd3+ substitution was investigated with step of 0.02 to 0.1 into the optimized Gd-Co compound. The crystal structure formation and crystallite size were explored by X-ray diffraction analysis in which the crystallite size and lattice constant decrease with increasing the Nd3+ substitution. The microstructural properties were studied by field emission scanning electron microscopy and atomic force microscopy studies. The obtained structural and morphological results reveal that the substitution of Nd3+ with more than 0.06 into the Gd-Co ferrites will change the material behavior and trends. The saturation magnetization and coercivity values were measured using a vibration sample magnetometer at room temperature. Comparative microwave absorption experiments demonstrate that the reflection loss properties enhance with increasing substitution of Nd3+ cations in Gd-Co ferrite spinel structure. This research reports that the as-prepared Nd3+ substituted Gd-Co ferrite compound stands as promising candidate for absorbing electromagnetic wave with a wider absorbing bandwidth of X-band.

中文翻译：

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钴铁氧体晶格中钕和钆的存在：电磁波吸收的结构、磁性和微波特征

摘要 本工作采用水热法合成了钕取代钆钴铁氧体纳米粒子。实验研究并报告了将 Nd3+ 和 Gd3+ 离子掺杂到铁氧体钴中在操纵阳离子分布以及进一步影响结构和磁性方面的重要作用。以 0.02 到 0.1 的步长研究了 Nd3+ 取代对优化的 Gd-Co 化合物的影响。通过 X 射线衍射分析探索晶体结构形成和微晶尺寸，其中微晶尺寸和晶格常数随着 Nd3+ 取代度的增加而减小。通过场发射扫描电子显微镜和原子力显微镜研究研究了微观结构特性。获得的结构和形态结果表明，将 Nd3+ 以大于 0.06 的量取代到 Gd-Co 铁氧体中将改变材料的行为和趋势。在室温下使用振动样品磁强计测量饱和磁化强度和矫顽力值。比较微波吸收实验表明，反射损耗特性随着 Gd-Co 铁氧体尖晶石结构中 Nd3+ 阳离子取代度的增加而增强。该研究报告称，所制备的 Nd3+ 取代的 Gd-Co 铁氧体化合物是具有更宽 X 波段吸收带宽的吸收电磁波的有希望的候选者。在室温下使用振动样品磁力计测量饱和磁化强度和矫顽力值。比较微波吸收实验表明，反射损耗特性随着 Gd-Co 铁氧体尖晶石结构中 Nd3+ 阳离子取代度的增加而增强。该研究报告称，所制备的 Nd3+ 取代的 Gd-Co 铁氧体化合物是吸收电磁波的有希望的候选者，具有更宽的 X 波段吸收带宽。在室温下使用振动样品磁强计测量饱和磁化强度和矫顽力值。比较微波吸收实验表明，反射损耗特性随着 Gd-Co 铁氧体尖晶石结构中 Nd3+ 阳离子取代度的增加而增强。该研究报告称，所制备的 Nd3+ 取代的 Gd-Co 铁氧体化合物是吸收电磁波的有希望的候选者，具有更宽的 X 波段吸收带宽。