| 热分解法制备MnFe2O4纳米粒子及其超顺磁性 |
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| 引用本文： | 尤娜,刘海林,李美亚,熊锐.热分解法制备MnFe2O4纳米粒子及其超顺磁性[J].物理实验,2011,31(2):11-14,19. |
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| 作者姓名： | 尤娜 刘海林 李美亚 熊锐 |
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| 作者单位： | 武汉大学,物理科学与技术学院,湖北,武汉,430072 |
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| 基金项目： | 国家基础科学人才培养基金项目(No.J0830310) |
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| 摘 要： | 采用热分解法制备了单相的锰铁氧纳米颗粒,X射线衍射以及透射电镜测量显示其颗粒大小约为20 nm.磁滞回线测量显示室温超顺磁性.零场和非零场磁测量显示制备的MnFe2O4纳米粒子平均截止温度为84.3 K,样品中最大颗粒的截止温度为230 K,且平均截止温度与外场H2/3存在线性关系.
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| 关 键 词： | MnFe2O4纳米粒子 超顺磁性 截止温度 |
Superparamagnetic properties of MnFe2O4 nanoparticles prepared by pyrolytic method |
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| YOU Na,LIU Hai-lin,LI Mei-ya,XIONG Rui.Superparamagnetic properties of MnFe2O4 nanoparticles prepared by pyrolytic method[J].Physics Experimentation,2011,31(2):11-14,19. |
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| Authors: | YOU Na LIU Hai-lin LI Mei-ya XIONG Rui |
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| Institution: | YOU Na,LIU Hai-lin,LI Mei-ya,XIONG Rui(School of Physics and Technology,Wuhan University,Wuhan 430072,China) |
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| Abstract: | MnFe2O4 nanoparticles were prepared by pyrolytic method.X-ray diffraction and transmission electron microscopy confirmed the formation of MnFe2O4 nanoparticles with the average particle size of 20 nm.The magnetic hysteresis loop measurement showed the superparamagnetic properties of MnFe2O4 nanoparticles at room temperature.The M-T curves with ZFC-FC procedures measured in different applied fields showed that the average blocking temperature Tm of superparamagnetism was about 84.3 K,with a maximum of 230 K ... |
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| Keywords: | MnFe2O4 nanoparticles superparamagnetism blocking temperature |
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