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Meyer–Neldel rule and anti Meyer–Neldel rule of ionic conductivity:Conclusions from the coupling model

Authors
Journal
Solid State Ionics
0167-2738
Publisher
Elsevier
Publication Date
Volume
105
Identifiers
DOI: 10.1016/s0167-2738(97)00469-4
Keywords
  • Meyer–Neldel Rule
  • Ion Conductivity
  • Coupling Model
  • Anti-Meyer–Neldel Rule

Abstract

Abstract The Meyer–Neldel rule or the Compensation Law linking a larger activation energy to a larger preexponential factor of the d.c. conductivity and found to hold in some families of ionic conductors is discussed in the framework of the Coupling Model. When certain conditions are satisfied, it is shown how the Meyer–Neldel rule can originate from the cooperative dynamics of ionic motions. Not so well known is the anti Meyer–Neldel rule, which has the opposite behavior. Using the system (AgI) x (AgPO 3) 1− x for 0≤ x≤0.6 as an example, we propose a possible physical origin of the anti Meyer–Neldel rule.

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