Dielectric relaxation in the superionic conductorxAgI-(1−x)AgPO3 glassy system

Abstract

Abstract. The ac dielectric response obtained on a set of xAgI-(l_x)AgPO 3 samples (x = 0.15, 0.30 and 0.50) is analysed, using the Inverse and Ill-Posed Problem approach, in terms of a distribution function of relaxation times. It is then shown that the shape of the distribution function becomes narrower and more symmetric when both temperature T and the mobile cation content x increase. Although no quantitative model enables yet to explain this new experimental fact and only qualitative speculations can be proposed, it opens new prospects for theoretical approaches.

Conductivity and Dielectric Relaxation in Various Ni(OH)[sub 2] Samples

“…This schematic representation also applies to matter where electrical charges are carried by ions. 48 One particular feature of solid ionic conductors is that ionic motion can give rise to both polarization ͓ pol Ј ()͔ and dc conductivity ( dc ) contributions at the same time. This makes it more difficult to separate both contributions clearly and to perform a simple analysis of the data.…”

“…It can be said that the polarization conductivity is the response of the intrinsic dipoles present in the sample and consequently to dielectric losses. In Ni͑OH) 2 , it can be associated to the localized hopping motion of the mobile protons 48 eventually solvated by water molecules.…”

“…The conductivity, pol Ј (), which results from polarization, can be expressed from the generalization of Debye's model as 48 pol…”