Structure and electrical properties of Co0.5CdxFe2.5-xO4 ferrites

A. M M Farea, Shalendra Kumar, Khalid Mujasam Batoo, Ali Yousef, Chan Gyu Lee, Alimuddin

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134 Citations (Scopus)

Abstract

We have studied the Cd ion doping effects in cobalt ferrite using X-ray diffraction (XRD), dielectric and impendence spectroscopy at room temperature. X-ray diffraction analysis indicates that all the samples exhibit a single phase nature with cubic spinel structure. The dielectric constant ε′, ε″, loss tangent tan δ and ac conductivity σac have been studied as a function of frequency and composition. It is observed that doping of the Cd ions increases ε′, ε″, tan δ and σac up to 20% after that it start decreasing with further doping. The dielectric properties and ac conductivity in studied samples have been explained on the basis of space charge polarization according to Maxwell and Wagner's two-layer model and the hoping between adjacent Fe2+ and Fe3+ as well as the hole hopping between Co3+and Co2+ ions at B-sites. The complex impedance analysis used to separate the grain and grain boundary of the system Co0.5CdxFe2.5-xO4.

Original languageEnglish
Pages (from-to)361-369
Number of pages9
JournalJournal of Alloys and Compounds
Volume464
Issue number1-2
DOIs
Publication statusPublished - Sep 22 2008

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Keywords

  • Dielectric behaviour
  • Ferrite
  • Impedance spectroscopy

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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