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Mn1-xZnxFe2O4 (0≤x≤1)纳米粉体的模板辅助溶胶凝胶法制备及其磁性能研究
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中国计量大学材料科学与工程学院,中国计量大学材料科学与工程学院,中国计量大学材料科学与工程学院,中国计量大学材料科学与工程学院,中国计量大学材料科学与工程学院,

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Study on Magnetic Properties of Mn1-xZnxFe2O4 (0≤x≤1) Nanoparticles Fabricated by a Template-assisted Sol-gel Method
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College of Materials Science and Engineering,China Jiliang University,Hangzhou,College of Materials Science and Engineering,China Jiliang University,Hangzhou,College of Materials Science and Engineering,China Jiliang University,Hangzhou,College of Materials Science and Engineering,China Jiliang University,Hangzhou,College of Materials Science and Engineering,China Jiliang University,Hangzhou,College of Materials Science and Engineering,Zhejiang University,Hangzhou

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    摘要:

    通过模板辅助溶胶-凝胶法制备了一系列的Mn1-xZnxFe2O4(0≤x≤1,步长为0.2)纳米粉体。利用XRD和VSM对材料的物相和磁性能进行了表征,主要研究了Mn1-xZnxFe2O4分子式中Zn含量的变化对样品的微观结构和磁性能的影响。实验结果表明,具有不同Zn含量的Mn1-xZnxFe2O4样品均为尖晶石结构;随着Zn含量的增加,样品的晶面间距d、平均晶粒尺寸D、饱和磁化强度Ms和居里温度Tc都呈现出下降的趋势,而样品的矫顽力Hc则呈现出先升高后降低的趋势。分析认为,Ms的下降可以用Yafet-Kittel倾角理论解释,Tc的降低归因于晶格中反铁磁性耦合的降低,而Hc的变化则主要是由于材料的磁晶各向异性常数K1的变化引起的。

    Abstract:

    A series of Mn-Zn ferrite nanoparticles with a nominal composition Mn1-xZnxFe2O4 (0≤x≤1 with steps of 0.2) were synthesized by a template-assisted sol-gel method. The phase identification and magnetic properties of Mn1-xZnxFe2O4 were measured by XRD and VSM. The effects of Zn content on the structure and magnetic properties of Mn1-xZnxFe2O4 were studied. It was found that all the Mn1-xZnxFe2O4 samples with different Zn content exhibited cubic spinel structure in single phase. With the increase of Zn content, the values of the crystal plane spacing d, average crystal size D, saturation magnetization Ms, Curie temperature Tc all exhibited a decreasing trend, while, the coercivity Hc exhibited a first increasing then decreasing trend. For the Mn0.6Zn0.4Fe2O4samples, the coercivity Hc exhibited the maximum values. The decreasing of Ms was attributed to the Yafet-Kittel canting, the decreasing of Tc was due to the decreasing of anti-ferromagneticScoupling among sublattices, the variation trend of the coercivity Hc can be explained on the basis of the changes of magneto-crystalline anisotropy K1 of the samples caused by the change of Mn1-xZnxFe2O4 formula with different Zn content x.

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李冬云,孙玉坤,徐扬,王凡,葛洪良,杨辉. Mn1-xZnxFe2O4 (0≤x≤1)纳米粉体的模板辅助溶胶凝胶法制备及其磁性能研究[J].稀有金属材料与工程,2018,47(S2):158~161.[Li Dongyun, Sun Yukun, Xu Yang, Wang Fan, Ge Hongliang, Yang Hui. Study on Magnetic Properties of Mn1-xZnxFe2O4 (0≤x≤1) Nanoparticles Fabricated by a Template-assisted Sol-gel Method[J]. Rare Metal Materials and Engineering,2018,47(S2):158~161.]
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  • 收稿日期:2017-12-04
  • 最后修改日期:2017-12-04
  • 录用日期:2018-02-01
  • 在线发布日期: 2018-11-01
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