Effect of Surface Modifications on the Magnetic Properties of Ni0.5Zn0.5Fe2O4 Nanoparticles

材料科学技术（英文）, 2010, 26(6): 547-551.

^1, , ^2, , ^3, , ^4, , ^5,

1.School of Materials Science and Engineering,Hebei University of Technology,Tianjin 300130,China;Center for the Condensed-Matter Science and Technology,Department of Physics,Harbin Institute of Technology,Harbin 150001,China

2.Center for the Condensed-Matter Science and Technology,Department of Physics,Harbin Institute of Technology,Harbin 150001,China;Department of Chemistry,Harbin Normal University,Harbin 150001,China

3.Center for the Condensed-Matter Science and Technology,Department of Physics,Harbin Institute of Technology,Harbin 150001,China;Department of Physics,Jiangsu University,Zhenjiang 212013,China

4.Center for the Condensed-Matter Science and Technology,Department of Physics,Harbin Institute of Technology,Harbin 150001,China

5.Center for the Condensed-Matter Science and Technology,Department of Physics,Harbin Institute of Technology,Harbin 150001,China

基金项目: the National Natural Science Foundation of China(10304004)

Effect of Surface Modifications on the Magnetic Properties of Ni0.5Zn0.5Fe2O4 Nanoparticles

Wei Zhang ^1, , Hongxia Wang ^2, , Faling Zhang ^3, , Zhengnan Qian ^4, , Wenhui Su ^5,

2.Center for the Condensed-Matter Science and Technology,Department of Physics,Harbin Institute of Technology,Harbin 150001,China;Department of Chemistry,Harbin Normal University,Harbin 150001,China

3.Center for the Condensed-Matter Science and Technology,Department of Physics,Harbin Institute of Technology,Harbin 150001,China;Department of Physics,Jiangsu University,Zhenjiang 212013,China

4.Center for the Condensed-Matter Science and Technology,Department of Physics,Harbin Institute of Technology,Harbin 150001,China

5.Center for the Condensed-Matter Science and Technology,Department of Physics,Harbin Institute of Technology,Harbin 150001,China

Keywords： Chemical synthesis

Two different silica sources have been used for the preparation of Ni0.5Zn0.5Fe2O4/SiO2 nanocomposites,and their effects on the particle size,crystallinity and the magnetic properties have been investigated by Xray diffraction(XRD),transmission electron microscopy(TEM)and physical property measurement system(PPMS).In both cases,Ni0.5Zn0.5Fe2O4 nanoparticles of 11 nm in mean particle size were well dispersed in silica matrix.The coercivity and the blocking temperature of Ni0.5Zn0.5Fe2O4 nanoparticles modified with the silicon coupling agent show little decrease,whereas the saturation magnetization increases obviously with respect to nanoparticles dispersed directly in silica matrix.It is considered that the decrease of the surface anisotropy resulting from the change in the surface coordination is responsible for the observed behavior.

参考文献

[1]	N. N. Parvathy;G. M. Pajonk;A. Venkateswara Rao .Growth and Optical Properties of Quantized CdS Crystallites in TEOS Silica Xerogels[J].Journal of Materials Synthesis and Processing,1999(4):221-228.
[2]	H. Nathani;R.D.K. Misra .Surface effects on the magnetic behavior of nanocrystalline nickel ferrites and nickel ferrite-polymer nanocomposites[J].Materials Science & Engineering, B. Solid-State Materials for Advanced Technology,2004(3):228-235.
[3]	S. Pal;P. Dutta;N. Shah;G. P. Huffman;M. S. Seehra .Surface Spin Disorder in Fe_(3)O_(4) Nanoparticles Probed by Electron Magnetic Resonance Spectroscopy and Magnetometry[J].IEEE Transactions on Magnetics,2007(6):3091-3093.
[4]	Y. D. Zhang;S. H. Ge;H. Zhang;S. Hui;J. I. Budnick;W. A. Hines;M. J. Yacaman;M. Miki .Effect of spin disorder on magnetic properties of nanostructured Ni-ferrite[J].Journal of Applied Physics,2004(11):7130-7132.
[5]	Christ R. Vestal;Z. John Zhang .Synthesis and Magnetic Characterization of Mn and Co Spinel Ferrite-Silica Nanoparticles with Tunable Magneti Core[J].Nano letters,2003(12):1739-1743.

上一张下一张

计量

下载量()
访问量()

作者相关

在本站搜索
在百度学术搜索
在万方数据库搜索
在CNKI搜索

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网

Effect of Surface Modifications on the Magnetic Properties of Ni0.5Zn0.5Fe2O4 Nanoparticles

参考文献