TY - JOUR

T1 - The AC conductivity of superionic conducting glasses (AgI)x-(Ag4P2O7)1-x (x = 0.8, 0.75, 0.7). Experiment and analysis based on the generalized Langevin equation

AU - Kawamura, J.

AU - Shimoji, M.

N1 - Funding Information:
The authors thank the Computer Center of the Hokkaido University for the use of the HITAC M-280H computer and Library Program SALS written by T. Nakagawa and Y. Oyanagi. The authors are also grateful to Drs T. Ohachi and S. Yoshikado in Doshishya University, Dr T. Ishii in Okayama University and Dr U. Nagashima of Okazaki National Research Institute for their helpful discussions. This research was partly supported by a Scientific Research Grant from the Ministry of Education of Japan.
Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.

PY - 1986/2

Y1 - 1986/2

N2 - The frequency-dependent complex impedance of superionic conducting glasses (AgI)x - (Ag4P2O7)1-x (x = 0.3, 0.25, 0.20) was measured from 5 Hz to 500 kHz below room temperature. The frequency dependence of the conductivity and the electric modulus observed here cannot be expressed by a single relaxation equation, but it is well described by an equivalent circuit involving a contribution due to Jonscher's universal law σ [ω] ∼ ωn (0 < n < 1). A linear relation between the DC conductivity and the relaxation time was observed irrespective of the sample compositions. These results are explained on the basis of the generalized Langevin equation associated with a non-exponential memory function. The physical basis of this approach is discussed in terms of the distribution of transition times arising from non-periodic potentials formed by immobile anions and many-body interactions among mobile cations at very high concentration in the superionic conducting glass.

AB - The frequency-dependent complex impedance of superionic conducting glasses (AgI)x - (Ag4P2O7)1-x (x = 0.3, 0.25, 0.20) was measured from 5 Hz to 500 kHz below room temperature. The frequency dependence of the conductivity and the electric modulus observed here cannot be expressed by a single relaxation equation, but it is well described by an equivalent circuit involving a contribution due to Jonscher's universal law σ [ω] ∼ ωn (0 < n < 1). A linear relation between the DC conductivity and the relaxation time was observed irrespective of the sample compositions. These results are explained on the basis of the generalized Langevin equation associated with a non-exponential memory function. The physical basis of this approach is discussed in terms of the distribution of transition times arising from non-periodic potentials formed by immobile anions and many-body interactions among mobile cations at very high concentration in the superionic conducting glass.

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U2 - 10.1016/0022-3093(86)90234-6

DO - 10.1016/0022-3093(86)90234-6

M3 - Article

AN - SCOPUS:0022008808

VL - 79

SP - 367

EP - 381

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

SN - 0022-3093

IS - 3

ER -