Diffusion of Ag ions under random potential barriers in silver-containing chalcogenide glasses

0386614 - FZÚ 2013 RIV GB eng J - Journal Article
Stehlík, Štěpán - Shimakawa, K. - Wágner, T. - Frumar, M.
Diffusion of Ag ions under random potential barriers in silver-containing chalcogenide glasses.
Journal of Physics D-Applied Physics. Roč. 45, č. 20 (2012), s. 1-5. ISSN 0022-3727. E-ISSN 1361-6463
Institutional research plan: CEZ:AV0Z10100521
Keywords : Ag ion diffusion * chalcogenide glass * Nyquist plots
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 2.528, year: 2012
http://iopscience.iop.org/0022-3727/45/20/205304/

We show that a random walk model of diffused ions interprets well the experimentally deduced Nyquist plots in ionic chalcogenide glasses. Fitting of the model to the experimental data in the Nyquist plots of Ag-As-S(Se) glasses taken as case examples yields important physical parameters such as number of mobile Ag+ ions, hopping relaxation time and diffusion coefficient. It was found that the number of freely moving Ag+ ions is almost independent of Ag content in Agx(As0.33S(Se)0.67)100-x glasses, while the maximum hopping relaxation time is highly dependent on Ag concentration.
Permanent Link: http://hdl.handle.net/11104/0215901