Influence of heterovalent cationic substitution on electrical properties of Ag6+x(P1−xGex)S5I solid solutions
| Autor: | O.I. Symkanych, Peter Kúš, M.J. Filep, A.I. Pogodin, O.P. Kokhan, Ihor Studenyak, T.Y. Babuka |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Mechanical Engineering Metals and Alloys Analytical chemistry Ionic bonding 02 engineering and technology Activation energy Crystal structure 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Dielectric spectroscopy law.invention Mechanics of Materials Electrical resistivity and conductivity law Materials Chemistry Crystallization Nyquist plot 0210 nano-technology Solid solution |
| Zdroj: | Journal of Alloys and Compounds. 873:159784 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2021.159784 |
| Popis: | High-quality single crystals of Ag6+x(P1−xGex)S5I (0.25, 0.5, 0.75) solid solutions are grown from the solution–melt by vertical zone crystallization method. In order to study the crystal structure and to establish the mechanism of formation of Ag6+x(P1−xGex)S5I solid solutions as well as to explain the peculiarities of ion transport, the investigation of the single crystals was carried out using XRD analysis by the Rietveld method based on the refined models of initial Ag6PS5I and Ag7Ges5I structures. The measurements of electrical conductivity of single-crystal Ag6+x(P1−xGex)S5I samples was performed using impedance spectroscopy method in frequency range of 1 × 101–2 × 106 Hz and temperature interval of 293–383 K. Ionic and electronic components of electrical conductivity are determined using Nyquist plots. Based on the analysis of compositional dependences, it was found that for solid solutions the maximum of the ionic component of electrical conductivity and the minimum of its activation energy are observed. The features of the ion transport mechanism in Ag6+x(P1−xGex)S5I solid solutions with a heterovalent substitution are explained. |
| Databáze: | OpenAIRE |
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