Analysis of electric relaxation and polaron conduction in nano-sized SrFe12O19

N. S. Krishna Kumar, T. S. Shahid, G. Govindaraj

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Abstract

Nanocrystalline Strontium hexaferrite was synthesized by co-precipitation method and characterized with X-Ray diffraction. Ac electrical studies of the sample were carried out by impedance spectroscopy for frequency range of 1Hz to 1MHz for various temperatures from 313K to 513K. The impedance data show anomalous electric relaxation and it was modelled with electrical equivalent circuit and Cole-Cole relaxation function. Hopping and conduction show a non-Arrhenius behaviour which is an indication of temperature dependence of activation energy. The power law behaviour of ac electric conductivity of the sample has been used to analyse polaron conduction. Summerfield scaling of ac conductivity did not follow at high frequency. The mechanism of electron hopping and polaron conduction is discussed.

Original languageEnglish (US)
Pages (from-to)2213-2215
Number of pages3
JournalInternational Journal of ChemTech Research
Volume6
Issue number3
StatePublished - Jan 1 2014

Keywords

  • Ac conductivity
  • Anomalous relaxation
  • Polaron conduction

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