Optical damage resistant LiNbO3 crystals were grown from melts of different compositions doped with magnesium. The AC conductivity of the crystals was measured in the temperature range 600-750 K and compared to that of the pure or slightly doped samples. The high activation energy and the low value of the conductivity together with a narrow OH infrared absorption band peaking near 3540 cm-1 can be interpreted as the formation of Mg-OH complexes in lithium niobate crystals heavily doped with magnesium.
ASJC Scopus subject areas
- Physics and Astronomy(all)