Plasma-chemical Synthesis of Fe₃O₄ Nanoparticles for Doping of High-Temperature Superconductors

详细信息    查看全文

• 作者：A. V. Uschakov ; I. V. Karpov ; A. A. Lepeshev
• 关键词：Ferrite nanoparticles ; Low ; pressure plasma ; chemical synthesis ; X ; ray diffraction ; Transmission electron microscopy ; Vibration magnetometry ; Mössbauer spectroscopy
• 刊名：Journal of Superconductivity and Novel Magnetism
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：30
• 期：2
• 页码：311-316
• 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

Ferrite nanoparticles (Fe₃O₄) have been produced by the direct low-pressure plasma-chemical synthesis. X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), vibration magnetometry (VSM), and Mössbauer spectroscopy (NGR) were used for measurements, showing that the produced nanoparticles have an average size of 9.4 nm, a crystalline phase of magnetite, possess a property of superparamagnetism at room temperature, and have a blocking temperature of 89 K. The peculiarities of nanoparticle behavior in the magnetic field, related to a large specific surface area, are discussed.