Effects of rare-earth Pr3+-Dy3+ doping on structural, magnetic, optical and dielectric properties of Zn2Y hexaferrite

IF 5.2 1区化学 Q1 CHEMISTRY, APPLIED

Journal of Rare Earths Pub Date : 2025-02-01 DOI:10.1016/j.jre.2024.02.014

Ibrahim Mohammed , Mohamed E. El Sayed , Ali Shawabkeh , Mohammad N. Murshed , Ibtehaj F. Alshdoukhi , Zeinhom M. El-Bahy , J. Mohammed , A.K. Srivastava

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Abstract

This study was conducted to investigate the properties of Pr³⁺-Dy³⁺ doped Zn₂Y-type hexaferrite for potential technological applications. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and field-emission scanning electron microscopy (FESEM) were used to analyze structural properties. The crystallite size in the synthesized samples varies between 57.54 and 68.57 nm. The vibrational bands at 400 and 600 cm⁻¹, common to all hexaferrites, were confirmed through FTIR. The FESEM analysis reveals an agglomeration of magnetic grains and a decrease in the average grain size from 1.24 to 1.06 μm. The M-H loops show that, with x values of 0.0, 0.1, and 0.2, the saturation magnetization is determined to be 34.76, 34.23, and 32.52 emu/g, respectively. The corresponding coercivity values are 21.24, 30.39, and 33.99 Oe. UV–visible spectroscopy using Tauc theory reveals an increase in the optical band gap from 2.32 to 2.50 eV, indicating a tunable energy band structure by incorporating Pr³⁺-Dy³⁺ ions. The dielectric constant increases, whereas AC conductivity decreases with increased Pr³⁺-Dy³⁺ concentration. The obtained results suggest the potential suitability of these materials for various technological applications.

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稀土 Pr3+-Dy3+ 掺杂对 Zn2Y 六价铁氧体结构、磁性、光学和介电性质的影响

本研究旨在调查掺杂 Pr-Dy 的 ZnY 型六价铁氧体的特性，以了解其潜在的技术应用。研究采用了 X 射线衍射 (XRD)、傅立叶变换红外光谱 (FTIR) 和场发射扫描电子显微镜 (FESEM) 来分析其结构特性。合成样品的晶粒大小在 57.54 至 68.57 nm 之间。傅立叶变换红外光谱证实了所有六价铁的共同振动带位于 400 和 600 厘米处。FESEM 分析表明磁性晶粒聚集，平均晶粒大小从 1.24 μm 减小到 1.06 μm。磁环显示，当磁化率为 0.0、0.1 和 0.2 时，饱和磁化率分别为 34.76、34.23 和 32.52 emu/g。相应的矫顽力值分别为 21.24、30.39 和 33.99 Oe。利用陶氏理论进行的紫外-可见光谱分析显示，光带隙从 2.32 eV 增加到 2.50 eV，这表明通过加入 Pr-Dy 离子形成了可调能带结构。介电常数随着 Pr-Dy 浓度的增加而增加，而交流电导率则随着增加而降低。这些结果表明，这些材料可能适用于各种技术应用。

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来源期刊

Journal of Rare Earths 化学-应用化学

CiteScore

8.70

自引率

14.30%

发文量

374

审稿时长

1.7 months

期刊介绍： The Journal of Rare Earths reports studies on the 17 rare earth elements. It is a unique English-language learned journal that publishes works on various aspects of basic theory and applied science in the field of rare earths (RE). The journal accepts original high-quality original research papers and review articles with inventive content, and complete experimental data. It represents high academic standards and new progress in the RE field. Due to the advantage of abundant RE resources of China, the research on RE develops very actively, and papers on the latest progress in this field emerge every year. It is not only an important resource in which technicians publish and obtain their latest research results on RE, but also an important way of reflecting the updated progress in RE research field. The Journal of Rare Earths covers all research and application of RE rare earths including spectroscopy, luminescence and phosphors, rare earth catalysis, magnetism and magnetic materials, advanced rare earth materials, RE chemistry & hydrometallurgy, RE metallography & pyrometallurgy, RE new materials, RE solid state physics & solid state chemistry, rare earth applications, RE analysis & test, RE geology & ore dressing, etc.