Structural and magnetic characterization of Zr-substituted magnetite (ZrxFe3-xO4, 0≤x≤1)

A. Gangwar, S. K. Alla, M. Srivastava, S. S. Meena, E. V. Prasadrao, R. K. Mandal, S. M. Yusuf, N. K. Prasad*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We report the preparation of monophasic Zr-substituted magnetite (ZrxFe3-xO4; 0≤x≤1) nanoparticles by wet chemical route. Such a report is lacking in the literature. Rietveld refinement of the X-ray diffraction (XRD) data suggests continuous decrease in the lattice parameter with increased Zr-substitutions. From TEM analysis, the size of the as synthesized particles was found to be in the range of 5-20 nm. The differential scanning calorimetry (DSC) curves for the samples with different amount of substitutions displayed considerable differences in their behaviors. The room temperature specific magnetization at 2 T has been found to decrease from 50 (x=0.2) to 41 A m2/kg (x=1.0) with increased Zr-substitution. From XRD and magnetic behavior analysis we could suggest that due to occupation of Zr4+ ions at tetrahedral and octahedral voids of Fe3O4, the amount of Fe2+ was more at octahedral site for x≤ 0.4 and at tetrahedral site for x>0.4 respectively. The ferrofluids prepared from these magnetic nanoparticles possessed good heating ability and Specific Absorption Rate (SAR) values suitable for bioapplications.

Original languageEnglish
Pages (from-to)559-566
Number of pages8
JournalJournal of Magnetism and Magnetic Materials
StatePublished - 1 Mar 2016
Externally publishedYes


  • Ferrofluids
  • Nanoparticles
  • Substituted magnetite
  • Superparamagnetic


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