| 掺杂La3+对水热合成MnZn铁氧体纳米晶的结构和磁性能的影响 |
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| 引用本文： | 谭小平,古映莹,梁叔全,桑商斌. 掺杂La3+对水热合成MnZn铁氧体纳米晶的结构和磁性能的影响[J]. 磁性材料及器件, 2004, 35(2): 20-21,46 |
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| 作者姓名： | 谭小平 古映莹 梁叔全 桑商斌 |
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| 作者单位： | 中南大学,材料科学与工程学院,湖南长沙,410083;中南大学,化学化工学院,湖南长沙,410083 |
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| 摘 要： | 用水热法制备了掺杂La3 的MnZn铁氧体纳米晶.研究了不同La3 离子含量对合成产物的影响. 通过XRD和TEM对产物进行表征,结果表明未添加和添加0.2%的样品为单一的立方尖晶石型结构,而添加0.4%以上的样品析出了六角晶相.La3 离子对MnZn铁氧体纳米晶水热晶化过程有着重大影响,它改变了晶粒形状并促进了晶粒的生长,得到了大小均匀的六角片状晶粒.掺杂样品的饱和磁化强度下降,甚至x=1.2%的样品表现出超顺磁性.
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| 关 键 词： | MnZn铁氧体纳米晶 水热法 La3+掺杂 显微结构 磁性能 |
| 文章编号： | 1001-3830(2004)02-0020-02 |
Effects of La3+ Dopant on the Structure and Magnetic Properties of MnZn Ferrite Nano-Particles Synthesized by Hydrothermal Method |
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| TAN Xiao-ping,GU Ying-ying,LIANG Shu-quan,SANG Shang-bin . College of Material Science and Engineering,Central South University,Changsha ,China, . College of Chemistry and Chemical Engineering,Central South University,Changsha ,China. Effects of La3+ Dopant on the Structure and Magnetic Properties of MnZn Ferrite Nano-Particles Synthesized by Hydrothermal Method[J]. Journal of Magnetic Materials and Devices, 2004, 35(2): 20-21,46 |
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| Authors: | TAN Xiao-ping GU Ying-ying LIANG Shu-quan SANG Shang-bin . College of Material Science Engineering Central South University Changsha China . College of Chemistry Chemical Engineering Central South University Changsha China |
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| Affiliation: | TAN Xiao-ping1,GU Ying-ying2,LIANG Shu-quan1,SANG Shang-bin2 1. College of Material Science and Engineering,Central South University,Changsha 410083,China, 2. College of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China |
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| Abstract: | Nanoscale La3+-doped MnZn ferrite particles were synthesized by hydrothermal method, and the effects of La3+ ions on the crystallization behavior and magnetic properties of the sample were discussed. The samples were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results show that the samples with mass ratio of La3+ dopant of x=0 and 0.2 % exhibit simple spinel phase structure, but a second phase appears for samples with x>0.4% besides the spinel one. It is observed that the La3+ ions change the shape of particles and improve their growth. As a result, homogeneous hexagons crystalline is obtained. The saturation magnetization of La3+ doped samples is lower than that of the undoped, and even the sample with x=1.2% behaves superparamagnetically. |
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| Keywords: | MnZn ferrite hydrothermal method La~(3+) dopant microstructure magnetic properties |
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