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Journal of Materials Science

, Volume 30, Issue 22, pp 5784–5788 | Cite as

Effect of Gd3+ substitution on dielectric behaviour of copper-cadmium ferrites

  • C. B. Kolekar
  • P. N. Kamble
  • S. G. Kulkarni
  • A. S. Vaingankar
Papers

Abstract

The dielectric constant, ε′, loss tangent (tan δ) and a.c. resistivity (ρa.c.) are measured in the frequency range of 100 Hz to 5 MHz for the series of samples Cdx Cu1−xFe2−yGdyO4 prepared by the ceramic technique. The dispersion in ε′ for all the values of x and y=0 and 0.1 shows a normal behaviour except for y=0.1 and x=0.4. The lowering of dielectric intensity in substituted ferrites (y=0.1) and fast dispersion of (ρa.c.) with frequency, are explained as due to the reduced number of Fe3+ participating in the polarization process and the hindrances caused by Gd3+ to the polarization process by localizing Fe2+ ions thereby increasing the resistivity and activation energy. The dispersion in tan δ for unsubstituted samples (y=0.0) shows a normal trend while substituted samples (y=0.1) show relaxation behaviour, which is explained by existing theories.

Keywords

Polymer Activation Energy Ferrite Dielectric Constant Material Processing 
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.

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Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • C. B. Kolekar
    • 1
  • P. N. Kamble
    • 1
  • S. G. Kulkarni
    • 1
  • A. S. Vaingankar
    • 1
  1. 1.Post-Graduate Department of PhysicsShivaji UniversityKolhapurIndia

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