Dielectric Relaxation in Complex Perovskite Oxide In(Co1/2Ti1/2)O3
| Autor: | T.P. Sinha, B.P. Singh, Lata Agrawal |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Materials science
Condensed matter physics Analytical chemistry Activation energy Dielectric Condensed Matter Physics Electronic Optical and Magnetic Materials Dielectric spectroscopy Control and Systems Engineering visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Relaxation (physics) Ceramic Electrical and Electronic Engineering Perovskite (structure) Monoclinic crystal system Cole–Cole equation |
| Zdroj: | Integrated Ferroelectrics. 118:24-33 |
| ISSN: | 1607-8489 1058-4587 |
| DOI: | 10.1080/10584587.2010.489463 |
| Popis: | The frequency-dependent dielectric relaxation of indium-cobalt-titanate [In(Co1/2Ti1/2)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. |
| Databáze: | OpenAIRE |
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