Abstract
The impedance spectra of Pb5Ge3O11 single crystals are measured in the frequency range from 5 Hz to 13 MHz at temperatures of 600 to 800 K in dry air and in a dry or wet nitrogen gas. It is found that the temperature and the gas composition significantly affect the electrical properties of the compound. The data obtained are used to discuss the origin of crystal lattice defects and their influence on charge transfer. It is concluded that the conduction is mixed in character (p-type electronic and ionic due to oxygen ions). The proton conduction is shown experimentally to be feasible. The possible mechanisms of proton transport in Pb5Ge3O11 are discussed.
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Duda, V.M., Baranov, A.I., Ermakov, A.S. et al. Influence of the defect structure on the electrical conductivity of Pb5Ge3O11 single crystals at high temperatures. Phys. Solid State 48, 63–67 (2006). https://doi.org/10.1134/S1063783406010136
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DOI: https://doi.org/10.1134/S1063783406010136