title: Mixed mobile ion effect and cooperative motions in silver-sodium phosphate glasses.
abstract: The conduction pathways and the extraordinary weak mixed mobile ion effect (MMIE) in AgxNa1-xPO3 glasses have been investigated by bond-valence analysis of reverse Monte Carlo produced structural models. We find that the MMIE is suppressed in this system due to a common cooperative hopping process, where both Ag and Na participate. This finding is in strong contrast to glass systems exhibiting a pronounced MMIE, where the two types of mobile ions have distinctly different conduction pathways and the M ions tend to block the pathways for the N ions and vice versa.
authors.affiliation: Department of Applied Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden.
authors.forename: Andreas
authors.initials: A
authors.lastname: Hall
authors.forename: Jan
authors.initials: J
authors.lastname: Swenson
authors.forename: Stefan
authors.initials: S
authors.lastname: Adams
authors.forename: Carlo
authors.initials: C
authors.lastname: Meneghini