Hydrothermal Preparation and Magnetic Properties of NaFeSi2O6: Nanowires vs Bulk Samples

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• 作者：Shiliang Zhou ; Wolfgang G. Zeier ; Moureen C. Kemei ; Moulay T. Sougrati ; Matthew Mecklenburg ; Brent C. Melot
• 刊名：Inorganic Chemistry
• 出版年：2014
• 出版时间：December 1, 2014
• 年：2014
• 卷：53
• 期：23
• 页码：12396-12401
• 全文大小：369K
• ISSN：1520-510X

文摘

A single-step hydrothermal route to the preparation of the pyroxene mineral, NaFeSi₂O₆, is reported. The as-prepared samples are found to adopt a nanowire morphology and can be made with a yield of several hundred milligrams at a time with high purity. Synchrotron X-ray diffraction, electron microscopy, and M枚ssbauer spectroscopy are employed to characterize the structure and morphology. A comparison of the temperature- and field-dependent magnetic properties between the nanowire and sintered phases shows substantial differences that can likely be attributed to the reduced particle size and increased number of spins on the surface of the nanowires.