Dielectric Relaxation in Complex Perovskite Oxide In(Co_1/2Ti_1/2)O₃

Abstract

The frequency-dependent dielectric relaxation of indium-cobalt-titanate [In(Co_1/2Ti_1/2)O₃] (ICT) ceramic, synthesized by a solid-state reaction technique is investigated by alternating-current impedance spectroscopy. The X-ray diffraction of the sample at room temperature shows a monoclinic phase. An analysis of ϵ′ and tanδ with frequency is performed assuming a distribution of relaxation times. The activation energy calculated from the frequency dependence of loss spectra is found to be ∼0.59 eV. The frequency-dependent conductivity spectra follow the power law. The Cole-Cole approach is used to explain the relaxation mechanism in ICT. The scaling behaviour of imaginary part of electric modulus (M″) suggests that the relaxation describes the same mechanism at various temperatures.

Keywords:

• In(Co_1/2Ti_1/2)O₃
• chemical synthesis
• dielectric properties

Acknowledgment

This work is financially supported by Department of Science and Technology of India through a project under grant no. SR/S2/CMP-01/2008.