Synthesis, Structural, and Magnetic Properties of Co-doped and Mn-doped ZnO Nanocrystalline DMS Prepared by the Facile Polyvinyl Alcohol Gel Method

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• 作者：Dang-Hyok Yoon ; Muksin ; Kati Raju
• 关键词：Polyvinyl alcohol ; XRD ; Rietveld refinement ; TEM ; Ferromagnetic behavior
• 刊名：Journal of Superconductivity and Novel Magnetism
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：30
• 期：1
• 页码：203-208
• 全文大小：
• 刊物类别：Physics and Astronomy
• 刊物主题：Strongly Correlated Systems, Superconductivity; Magnetism, Magnetic Materials; Condensed Matter Physics; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1557-1947
• 卷排序：30

文摘

Nanocrystalline undoped and doped (10 at. % Co and Mn) zinc oxide diluted magnetic semiconductors (DMSs) were synthesized at relatively low temperatures (∼ 300 ∘C) via a facile polyvinyl alcohol (PVA) gel route. The highly crystalline samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and magnetization measurements. The XRD data were analyzed using the Rietveld refinement technique and were found to crystallize in the hexagonal wurtzite structure without impurities. The crystallite sizes of samples annealed at 600 ∘C were found to be in the range of 30–50 nm, which concurred with the TEM results. Magnetization measurements showed that Co-doped and Mn-doped ZnO exhibits weak ferromagnetic behavior at room temperature. The results showed that PVA gel synthesis is an efficient way to prepare DMS materials with reduced time and energy consumption, and may open up new possibilities for the synthesis of high-quality DMS materials.