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题名: Magnetic properties of tin-doped magnetite nanoparticles
作者: Lu YW (Lu Yan-Wu);  Zhu QS (Zhu Qin-Sheng);  Liu FX (Liu Fang-Xin)
发表日期: 2006
摘要: Structural and magnetic characteristics of Fe3-xSnxO4 (x < 0.3) nanoparticles synthesized using the precipitation exchange method have been investigated by X-ray diffraction, transmission electron microscope, Mossbauer spectra, X-ray photoelectron spectroscopy and magnetization measurement. The mean particle dimension decreases from 8 to 6 nm, the lattice parameters enlarge, the saturation magnetization decreases, as well as the magnetization and the coercive field increase, with increasing tin-content. The paramagnetic property of the specimens indicates that the replacement of Fe3+ by Sn4+ on the octahedral sites of Fe3O4 causes a progressive lowering of the Curie temperature and the Curie temperatures of the materials are all lower than that of crystallite tin-doped magnetite. This striking debasing is due to the lessening of the grain size. This is the smallest size reported thus far for paramagnetic tin-doped magnetite particles. (c) 2006 Elsevier B.V. All rights reserved.
KOS主题词: Iron;  transition;  Anisotropy;  Oxides
刊名: PHYSICS LETTERS A
专题: 中国科学院半导体研究所(2009年前)_期刊论文

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Lu YW (Lu Yan-Wu); Zhu QS (Zhu Qin-Sheng); Liu FX (Liu Fang-Xin) .Magnetic properties of tin-doped magnetite nanoparticles ,PHYSICS LETTERS A,2006 ,359(1):66-69
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