10.1186/2228-5326-2-6

Retracted: Effect of sintering temperature on apparent density and transport properties of NiFe2O4: synthesized from nanosize powder of NiO and Fe2O3

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  • Shamima Choudhury*1,
  • Mahabub Alam Bhuiyan1,
  • Sheikh Manjura Hoque2,
  1. Department of Physics, University of Dhaka, Dhaka, 1000, BD
  2. Materials Science Division, Atomic Energy Centre, Dhaka, 1000, BD
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Published in Issue 2012-06-14

How to Cite

Choudhury, S., Bhuiyan, M. A., & Hoque, S. M. (2012). Retracted: Effect of sintering temperature on apparent density and transport properties of NiFe2O4: synthesized from nanosize powder of NiO and Fe2O3. International Nano Letters, 2(1 (December 2012). https://doi.org/10.1186/2228-5326-2-6
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Abstract

Retraction This article was mistakenly published twice. For this reason this duplicate article has now been retracted. For citation purposes please cite the original: http://www.inljournal.com/?_action=articleInfo&article=19 Abstract Polycrystalline NiFe 2 O 4 was prepared by solid-state reaction from nanosize powders of NiO and Fe 2 O 3 which were synthesized by wet chemical method. Enhancement of apparent density of the sample has been observed with the increase in sintering temperature and has great influence on the transport properties of NiFe 2 O 4 . Decrease in resistivity with increasing temperature confirms the semiconducting behavior of the prepared ferrites. Also, it was found that the value of resistivity at room temperature decreased with the increase in sintering temperature. Variation of activation energy has been found for different sintering temperatures. Dielectric constant shows the normal behavior of the ferrite materials which can be explained on the basis of Koops' two-layer model and Maxwell-Wagner polarization theory. Also, the increased value of dielectric constant ( κ ) has been observed with the increase in sintering temperature.

Keywords

  • Apparent density,
  • DC resistivity,
  • Activation energy,
  • Dielectric constant
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References

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