A1.2 Oxygen Partial Pressure Dependent Electrical Conductivity of LiNb1-xTaxO3 Solid Solutions
- SMSI 2021
2021-05-03 - 2021-05-06
- SMSI 2021 - Sensors and Instrumentation
- A1 Piezoelectric High-temperature Sensors I (Special Session)
- A. Kabir, Y. Suhak, H. Fritze - Clausthal University of Technology, Goslar (Germany), D. Roshchupkin, B. Red’kin - Russian Academy of Science, Moscow (Russia), S. Ganschow - Leibniz-Institut für Kristallzüchtung, Berlin (Germany)
- 43 - 44
The electrical conductivity is investigated for piezoelectric single crystals of congruent lithium niobite (LiNbO3, LN), lithium tantalate (LiTaO3, LT), and their solid solutions (LiNb1−xTaxO3, LNT) at varying oxygen partial pressure in the range of 0.2-10−15 bar at a constant temperature of 900 °C. These crystals have been grown by the Czochralski and micro-pulling down method. At sufficiently low oxygen partial pressure, the LN sample demonstrates about two orders of magnitude larger electrical conductivity than LT. Such an outcome indicates a dominant n-type conductivity in the former. Moreover, the increase of the Nb/Ta ratio shows a tendency to decrease conductivity for LNT.