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Phase separation and ionic conductivity: an electric force microscopy investigation of silver chalcogenide glasses

V. BALAN1, A. PIARRISTEGUY1, M. RAMONDA2, A. PRADEL1, M. RIBES2,*

Affiliation

  1. Laboratoire de Physicochimie de la Matière Condensée UMR 5617, Institut Charles Gerhardt FR1878, Université de Montpellier II, Place E. Bataillon, F-34095 Montpellier Cedex 5, France
  2. Laboratoire de Microscopie en Champ Proche, Université de Montpellier II, Place E. Bataillon, F-34095 Montpellier Cedex 5, France

Abstract

Electric Field Microscopy was used to characterise the electrical heterogeneousness existing in several chalcogenide glasses. While the (Ag2S)x(GeS)60(GeS2)40-x glasses were shown to be homogeneous, sulphide (Ag2S)x(GeS2)100-x and (Ag2S)x(As2S3)100-x and selenide Agx(Ge0.25Se0.75)100-x glasses show heterogeneousness. Such a heterogeneousness is the electrical signature of a phase separation existing in the glasses. The obtained data helped us in identifying the phase separation and the subsequent percolation threshold as being responsible for the big jump occurring in the conductivity curve of these materials..

Keywords

Chalcogenide glasses, Electric force microscopy, Field effect scanning electron microscopy, Phase separation, conductivity.

Submitted at: Nov. 6, 2006
Accepted at: Nov. 2, 2006

Citation

V. BALAN, A. PIARRISTEGUY, M. RAMONDA, A. PRADEL, M. RIBES, Phase separation and ionic conductivity: an electric force microscopy investigation of silver chalcogenide glasses, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 6, pp. 2112-2116 (2006)