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

0386614 - FZÚ 2013 RIV GB eng J - Článek v odborném periodiku
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
Výzkumný záměr: CEZ:AV0Z10100521
Klíčová slova: Ag ion diffusion * chalcogenide glass * Nyquist plots
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.528, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0215901