We report a four-times decrease in the electric fields for 180° domain reversal in congruent LiTaO3 crystals with an increase in temperature from 22 to 250°C. This is accompanied by a substantial broadening of the field range over which domain reversal takes place, by an order of magnitude. The large internal fields of ∼5.5 kV/mm at room temperature, as measured by the asymmetry in polarization hysteresis loop, disappears at higher temperatures. With increasing temperature, the domain switching changes from lateral growth dominated to nucleation dominated kinetics.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)