Abstract
The structure, phase composition, and magnetic properties of carbon nanotubes filled with iron nanoparticles and obtained by thermolysis of a mixture of ferrocene and C60 fullerene or ferrocene and orthoxylene at a temperature of 800°C are investigated. Electron microscopy, X-ray diffraction, and Mössbauer spectroscopy data lead to the conclusion that carbon nanotubes are multilayer systems partially filled with iron nanoparticles and/or nanorods. Metallic inclusions in nanotube channels form α-Fe, γ-Fe, and Fe3C phases. The concentration of each phase in the samples is determined. It is shown that 10–20-nm iron clusters in nanotubes exhibit magnetic properties typical of bulk phases of iron. High elasticity of carbon nanotube walls facilitates stabilization of the high-temperature γ-Fe phase; the relative concentration of this phase in a sample can be increased by lowering the concentration of ferrocene in the initial reaction mixture.
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Original Russian Text © I.S. Lyubutin, K.V. Frolov, O.A. Anosova, V.S. Pokatilov, A.V. Okotrub, A.G. Kudashov, Yu.V. Shubin, L.G. Bulusheva, 2009, published in Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2009, Vol. 136, No. 2, pp. 302–310.
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Lyubutin, I.S., Frolov, K.V., Anosova, O.A. et al. Phase states and magnetic properties of iron nanoparticles in carbon nanotube channels. J. Exp. Theor. Phys. 109, 254–261 (2009). https://doi.org/10.1134/S1063776109080093
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DOI: https://doi.org/10.1134/S1063776109080093