Etude de la diffusion des cations Cu+ dans le verre (CuPO3)0.5(CuI)0.5 par diffusion quasielastique des neutrons

C. Rousselot, R. Mercier, J. P. Malugani, M. Tachez, C. A. Angell, A. J. Dianoux

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

A neutron scattering experiment was performed on the fast ionic conductor (CuPO3)0.5(CuI)0.5 using the time-of-flight spectrometer IN6 with the following parameters: λ = 5,1 A ̊, resolution (FWHM) Eo = 80 μev, 1.44 < Q < 2.04 A ̊-1. The spectra essentially consist of a quasielastic broadening of the elastic peak with a long inelastic tail up to 20 meV. The deconvolution of elastic and quasielastic contribution gives a constant value of the purely elastic contribution : 90 % for three temperatures. The D coefficients obey an Arrhenius law : D=2.57×10-5exp( -Ea RT)cm2s-1. with Ea = 2.6 KJ.mol-1. Only 22 % of Cu+ ions are implied in the diffusion motions compared to 50 % of Ag+ ions in the superionic AgPO3-AgI glass. The activation energy is much lower than the results previously obtained on Ag+ glasses. The motion described here certainly occurs locally without leading to long range diffusion which is involved in ionic conductivity.

Original languageEnglish (US)
Pages (from-to)535-544
Number of pages10
JournalMaterials Research Bulletin
Volume24
Issue number5
DOIs
StatePublished - May 1989
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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