Rietveld refinement and magnetic characterization of nanospheric CoFe2O4 prepared under the effect of ethylene glycol and H2O

IF 3.2 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS Journal of Sol-Gel Science and Technology Pub Date : 2024-07-08 DOI:10.1007/s10971-024-06463-0

Amel Mohamed Abouelnaga, Ali B. Abou Hammad

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Abstract

Cobalt ferrite nanoparticles (CF NPs) have received appreciable interest recently due to their impressive chemical stability, high coercivity, and potent anisotropic magneto-crystalline. The Sol-gel method was appointed to manufacture Cobalt ferrites, utilizing ethylene glycol (Eth) and water (H₂O) as diverse solvents to construct CF-Eth and CF-H₂O. The surface morphology, crystal structure, and magnetic properties of CF-Eth and CF-H₂O NPs were entirely deliberated through techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR), and vibrating sample magnetometer (VSM). The XRD refinement through Rietveld methods utilizing Fullprof software proved that both samples crystallized into a spinel structure in cubic phase with space group Fd-3 m. The Williamson-Hall Plot was employed to determine the crystallite size (G) and microstrain (ε). The mean crystallite size was found to be 73 nm and 51 nm for CF-Eth and CF-H₂O, respectively. FE-SEM confirmed the regular shape distribution of the particles. The measured saturation magnetization (MS) was 76.6 and 71.9 emu g⁻¹ for CF-Eth and CF-H₂O NPs, respectively, at room temperature.

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乙二醇和 H2O 作用下制备的纳米 CoFe2O4 的里特维尔德细化和磁性表征

钴铁氧体纳米粒子（CF NPs）因其令人印象深刻的化学稳定性、高矫顽力和强大的各向异性磁结晶而受到广泛关注。采用溶胶-凝胶法制造钴铁氧体，利用乙二醇（Eth）和水（H2O）作为不同的溶剂来构建 CF-Eth 和 CF-H2O。通过扫描电子显微镜（SEM）、X 射线衍射（XRD）、傅立叶变换红外（FTIR）和振动样品磁力计（VSM）等技术，对 CF-Eth 和 CF-H2O NPs 的表面形貌、晶体结构和磁性能进行了全面研究。利用 Fullprof 软件通过 Rietveld 方法进行的 XRD 精炼证明，两种样品都结晶成空间群为 Fd-3 m 的立方体尖晶石结构。发现 CF-Eth 和 CF-H2O 的平均晶粒大小分别为 73 nm 和 51 nm。FE-SEM 证实了颗粒的规则形状分布。在室温下，CF-Eth 和 CF-H2O NPs 的饱和磁化率（MS）分别为 76.6 和 71.9 emu g-1。

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来源期刊

Journal of Sol-Gel Science and Technology 工程技术-材料科学：硅酸盐

CiteScore

4.70

自引率

4.00%

发文量

280

审稿时长

2.1 months

期刊介绍： The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.