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Journal of Materials Science

, Volume 42, Issue 16, pp 6989–6995 | Cite as

Compositional, temperature and frequency dependence of dielectric behaviour of zinc substituted copper- ferri-chromates

  • M. C. Chhantbar
  • K. B. ModiEmail author
  • H. H. Joshi
Article

Abstract

The comprehensive study on compositional, temperature and frequency dependent dielectric properties of ZnxCu1−xFeCrO4 (x = 0.0, 0.2, 0.4 and 0.6 ) was carried out by means of a. c. resistivity (ρac), dielectric constant (ε′) and loss tangent (tanδ) measurements in the frequency range from 100 Hz to 1 MHz at different temperatures ranging from 40 °C to 500 °C. An abnormal behaviour of ε′ as a function of temperature is explained on the basis of contribution of two types of charge carriers in the polarization process. It is found that magnetic ordering does not have marked influence on the dielectric properties. The probable conduction mechanism in the present system is due to electron transition such as Fe2+\( \leftrightarrows \) Fe3+ and Cu2+ \( \leftrightarrows \) Cu1+ rather than ionization or polaron hopping mechanism.

Keywords

Ferrite Dielectric Constant Conduction Process CuFe2O4 Dielectric Polarization 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

One of the authors (KBM) is thankful to AICTE, New Delhi for providing financial assistance in the form of career awards for young teachers and MCC is thankful to Nuclear Science centre, New Delhi, for providing financial assistance in the form of research fellowship.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Department of PhysicsSaurashtra UniversityRajkotIndia

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