The effect of annealing temperature on the structural, optical, and magnetic properties of ZnO@ NiFe2O4 nanocomposites

被引：0
作者：
El-Khayatt, Ahmed M [1 ]
Abdel-Fattah, Essam M [2 ]
Azab, A.A. [3 ]
机构：
[1] Department of Physics, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh
[2] Department of Physics, College of Science and Humanities, Prince Sattam Bin Abdulaziz University, PO Box 173, Al-Kharj
[3] Solid State Physics Department, Physics Research Institute, National Research Centre, PO, Dokki Giza
来源：
Physica Scripta | 2025年 / 100卷 / 05期
关键词：
annealing temperature; diluted magnetic semiconductors; nanocomposites; ZnO;
D O I：
10.1088/1402-4896/adcbe6
中图分类号：
学科分类号：
摘要：
In the current study, ZnO/NiFe2O4 nanocomposites were synthesized using co-precipitation and sono-mechanical methods, followed by annealing at temperatures of 200, 500, 800, and 1100 °C. We examined their structural, optical, and magnetic properties through XRD, TEM, UV-visible spectroscopy, and VSM. XRD analysis indicates that ZnO and NiFe2O4 exhibit hexagonal and cubic phases, respectively. Higher annealing temperatures led to increased ferrite peak intensity and larger crystallite sizes. The optical band gap (Eg) decreased, while saturation magnetization (Ms) increased with temperature; conversely, remanent magnetization (Mr) and coercivity (Hc) decreased. Observed color changes and optical/magnetic data suggested ion exchange between ZnO and NiFe2O4, resulting in Zn1−xNixO and Ni1−xZnxFe2O4 formation. All findings demonstrated that an annealing temperature of 1100 °C significantly influenced the structural, optical, and magnetic properties. Optimizing the annealing temperature is essential for modifying the physical and optical properties of Zn/5% NFO nanocomposites for various applications. © 2025 IOP Publishing Ltd. All rights, including for text and data mining, AI training, and similar technologies, are reserved.
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