What is it about?

What is it about? This work mainly reports observation of the electrical and dielectric properties of LCAMO manganites with compositions below the concentration limit of silver. We found that for all Silver concentrations, the samples show semiconductor behavior and that dc-conductivity is marked by saturation value at a specific temperature, which decreases to the ambient temperature of 20% of silver concentration. Additionally, the improvement of dc-conductivity was attributed to better connectivity of the grains by silver distribution at the grain boundaries. A Debye-like relaxation was clearly identified for all Ag content from the variation of the dielectric constant with frequency. Such relaxation is explained by Maxwell–Wagner polarization.

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Why is it important?

In this study, for the first time, we successfully unraveling the limit of silver solubility in perovskites and their effects on conduction mechanism, and dielectric behavior using impedance spectroscopic.

Perspectives

Writing this article was a great pleasure as it has co-authors with whom I have had long-standing collaborations. Many thanks, to the collaboration between the University of Sfax and Gabes.

Dr Mourad Smari Smari
University of Science Of Sfax

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This page is a summary of: Conduction mechanism, impedance spectroscopic investigation and dielectric behavior of La0.5Ca0.5−xAgxMnO3 manganites with compositions below the concentration limit of silver solubility in perovskites (0 ≤ x ≤ 0.2), Dalton Transactions, January 2015, Royal Society of Chemistry, DOI: 10.1039/c5dt00444f.
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