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Transmission electron microscopy observation of the microemulsion process and the magnetic properties of the resultant nanocrystalline Ni–Zn ferrites

Published online by Cambridge University Press:  03 March 2011

Shifeng Yan  and
Enle Zhou
Shifeng Yan*
Affiliation:
State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Graduate School of the Chinese Academy of Sciences, Chinese Academy of Sciences,Changchun 130022, People’s Republic of China
Enle Zhou
Affiliation:
State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Graduate School of the Chinese Academy of Sciences, Chinese Academy of Sciences,Changchun 130022, People’s Republic of China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Nanocrystalline Ni–Zn ferrite particles (Ni0.5Zn0.5Fe2O4) have been successfully produced by microemulsion method. The microemulsion process was first observed by transmission electron microscopy examination. The particles exhibit a blocking temperature of 95 K. They do not attain saturation magnetization even at a high field of 50 KOe. The saturation magnetization at 300 K is 29.8 emu/g, which is significantly lower than that reported for the bulk ceramic standard. Below the blocking temperature, the Ni0.5Zn0.5Fe2O4 nanocrystalline particles exhibit a hysteretic feature. The remanent magnetization and coercivity at 2K are 10.45 emu/g and 453 Oe, respectively.

Keywords

Magnetic propertiesNanoparticleTransmission electron microscopy (TEM)
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 10 , October 2005 , pp. 2627 - 2631
Copyright
Copyright © Materials Research Society 2005

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References

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