The influence of temperature on electric-field-induced domain switching of [0 0 1] c oriented 0.7Pb(Mg 1/3Nb 2/3)O 3-0.3PbTiO 3 (PMN-0.3PT) single crystal has been studied. The piezoelectric properties of PMN-0.3PT single crystal change drastically at one critical field at 30 °C and two critical fields at 90 °C corresponding to electric-field-induced domain switching. The domain structures were studied by polarizing light microscopy on the [1 0 0] c surface under the electric field applied along [0 0 1] c direction. The PMN-0.3PT single crystal exhibits a rapid increase in piezoresponse at 100 V/mm, which is related to R-M A phase transformation. At 90 °C, the M and T 0 0 1 phases coexist at 100 V/mm, while T 0 0 1 mono-domain appears at 300 V/mm. The domain switching process here can be identified as (T 1 0 0 or T 0 1 0) → M → T 0 0 1. The experimental results show that the phase state and domain structures of the crystal are closely related to the piezoelectric behaviors.
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry