10.1186/2228-5326-3-8

Rietveld analysis of XRD patterns of different sizes of nanocrystalline cobalt ferrite

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  • Lawrence Kumar1,
  • Pawan Kumar2,
  • Amarendra Narayan3,
  • Manoranjan Kar*2,
  1. Department of Physics, Indian Institute of Technology Patna, Patna, 800013, IN Centre for Nanotechnology, Central University of Jharkhand, Ranchi, 835205, IN
  2. Department of Physics, Indian Institute of Technology Patna, Patna, 800013, IN
  3. Department of Physics, Patna University, Patna, 800005, IN
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Published in Issue 2013-02-12

How to Cite

Kumar, L., Kumar, P., Narayan, A., & Kar, M. (2013). Rietveld analysis of XRD patterns of different sizes of nanocrystalline cobalt ferrite. International Nano Letters, 3(1 (December 2013). https://doi.org/10.1186/2228-5326-3-8
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Abstract

Abstract Nanocrystalline cobalt ferrite powder has been synthesised by citrate precursor and co-precipitation methods. Structural characterization of the samples has been carried out using powder X-ray diffraction, Fourier transform infrared spectroscopy (FT-IR) and field emission scanning electron microscope (FE-SEM). Distribution of cations among the two interstitial sites (tetrahedral and octahedral sites) has been estimated by analysing the powder X-ray diffraction patterns by employing Rietveld refinement technique, and the results reveal the existence of samples as a mixed type spinel with cubic structure. It is observed that the distribution of cations and structural parameters are strongly dependent on synthesis method and annealing temperature. The vibrational modes of the octahedral and tetrahedral metal complex in the sample have been examined using FT-IR in the wave number range of 390 to 750 cm −1 , and it shows an absorption band within this range, which confirms the spinel structure of the sample. The existence of constituents in the sample, i.e., Co, Fe and O has been authenticated using energy dispersive spectrum with the help of a FE-SEM.

Keywords

  • XRD,
  • Rietveld,
  • Spinel,
  • Cation distribution
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