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Charge transport in Li2B4O7 in single crystal and glassy states |
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| Authors: | I M Rizak V M Rizak N D Baisa V S Bilanich M V Boguslavskii S Yu Stefanovich V M Golovei |
| Institution: | (1) Dnepropetrovsk National University, Ukraine;(2) Uzhgorod National University, Ukraine;(3) Kiev Institute of Management and Information Technologies, National Aviation University, Ukraine;(4) Moscow State University, Vorob'evy gory, Moscow, 119992, Russia;(5) Institute of Electronic Physics, National Academy of Sciences of Ukraine, Uzhgorod, Ukraine |
| Abstract: | The electrophysical properties of Li2B4O7 single crystals and glasses are studied in the temperature range 290–1100 K and the frequency range 1–1000 kHz. The strong frequency dispersion of ionic conductivity at temperatures close to room temperature is explained by the low-frequency hoppings of lithium ions from the basic to the interstitial positions. The dielectric relaxation accompanying the transport of lithium ions is analyzed within the framework of the Debye-Skanavi model. The minimum hopping length of Li+ ions and the height of the potential barrier between their closest positions are determined. The parameters obtained are compared with the known structural data. |
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