1-xZnxFe2O4; 模板輔助溶膠凝膠; 磁性能; 納米粉體"/> 1-xZnxFe2O4(0≤x≤1,步長為0.2)納米粉體。利用XRD和VSM對材料的物相和磁性能進行了表征,主要研究了Mn1-xZnxFe2O4分子式中Zn含量的變化對樣品的微觀結(jié)構(gòu)和磁性能的影響。實驗結(jié)果表明,具有不同Zn含量的Mn1-xZnxFe2O4樣品均為尖晶石結(jié)構(gòu)；隨著Zn含量的增加,樣品的晶面間距d、平均晶粒尺寸D、飽和磁化強度Ms和居里溫度Tc都呈現(xiàn)出下降的趨勢,而樣品的矯頑力Hc則呈現(xiàn)出先升高后降低的趨勢。分析認為,Ms的下降可以用Yafet-Kittel傾角理論解釋,Tc的降低歸因于晶格中反鐵磁性耦合的降低,而Hc的變化則主要是由于材料的磁晶各向異性常數(shù)K1的變化引起的。"/>

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Mn1-xZnxFe2O4 (0≤x≤1)納米粉體的模板輔助溶膠凝膠法制備及其磁性能研究
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中國計量大學材料科學與工程學院,中國計量大學材料科學與工程學院,中國計量大學材料科學與工程學院,中國計量大學材料科學與工程學院,中國計量大學材料科學與工程學院,

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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:

    通過模板輔助溶膠-凝膠法制備了一系列的Mn1-xZnxFe2O4(0≤x≤1,步長為0.2)納米粉體。利用XRD和VSM對材料的物相和磁性能進行了表征,主要研究了Mn1-xZnxFe2O4分子式中Zn含量的變化對樣品的微觀結(jié)構(gòu)和磁性能的影響。實驗結(jié)果表明,具有不同Zn含量的Mn1-xZnxFe2O4樣品均為尖晶石結(jié)構(gòu)；隨著Zn含量的增加,樣品的晶面間距d、平均晶粒尺寸D、飽和磁化強度Ms和居里溫度Tc都呈現(xiàn)出下降的趨勢,而樣品的矯頑力Hc則呈現(xiàn)出先升高后降低的趨勢。分析認為,Ms的下降可以用Yafet-Kittel傾角理論解釋,Tc的降低歸因于晶格中反鐵磁性耦合的降低,而Hc的變化則主要是由于材料的磁晶各向異性常數(shù)K1的變化引起的。

    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,孫玉坤,徐揚,王凡,葛洪良,楊輝. Mn1-xZnxFe2O4 (0≤x≤1)納米粉體的模板輔助溶膠凝膠法制備及其磁性能研究[J].稀有金屬材料與工程,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
  • 錄用日期:2018-02-01
  • 在線發(fā)布日期: 2018-11-01
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