Influence of the lithium niobate crystals composition on mobility of H+ and Li+ ions in the temperature range 300-450 K

IR absorption spectroscopy and electrical conductivity have been studied in a series of lithium niobate crystals. We have established that mobility of Li+ ion sharply increases when a crystal approaches stoichiometric composition. This is especially true along the polar direction of a crystal. We have also established that doping of lithium niobate crystals with under-threshold concentrations of non-photorefractive Mg and Zn substantially decreases mobility of H+ ions.

Automated summary

In a series of lithium niobate crystals, it was found that the mobility of Li+ ions sharply increases as the crystal approaches stoichiometric composition, especially along the polar direction. Additionally, doping lithium niobate crystals with under-threshold concentrations of non-photorefractive Mg and Zn substantially decreases the mobility of H+ ions.