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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
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
作者姓名:谭小平  古映莹  梁叔全  桑商斌
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
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.

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
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
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
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
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.
Keywords:MnZn ferrite  hydrothermal method  La~(3+) dopant  microstructure  magnetic properties  
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