Physics of the Solid State

, Volume 58, Issue 1, pp 76–80 | Cite as

Mössbauer study of the iron atom state in modified chromium dioxide

  • S. I. Bondarevskii
  • V. V. Eremin
  • V. V. Panchuk
  • V. G. Semenov
  • M. G. Osmolovsky


Powders of modified chromium dioxide produced by the hydrothermal method were studied using 57Fe Mössbauer spectroscopy at a temperature of 298 K. The content of the modifier, i.e., 57Fe compound, was varied from 2 to 10 mmol/mol Cr at a Sb content of 2.2 and 10 mmol/mol Cr. It was shown that, independently of concentrations, Fe3+ ions are distributed between three magnetic solid solutions (sextets): based on CrO2 (bulk material and iron-enriched surface layer), based on Cr2O3, and surface β-CrOOH (doublet). In this case, chromium atoms were not substituted in the CrSbO4 nucleation (12 nm in size) phase with an accuracy up to the Mössbauer factor. It was assumed that the powder coercivity, in addition to the size factor, is controlled by the iron concentration in the CrO2 surface layer.


Iron Atom Isomer Shift Quadrupole Splitting Chromic Anhydride Chromium Dioxide 


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Copyright information

© Pleiades Publishing, Ltd. 2016

Authors and Affiliations

  • S. I. Bondarevskii
    • 1
  • V. V. Eremin
    • 2
  • V. V. Panchuk
    • 2
  • V. G. Semenov
    • 2
  • M. G. Osmolovsky
    • 2
  1. 1.Peter the Great St. Petersburg Polytechnic UniversitySt. PetersburgRussia
  2. 2.Saint Petersburg State UniversitySt.PetersburgRussia

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