Abstract
The influence of temperature on electric-field-induced domain switching of [001]c oriented 0.7Pb(Mg1/3Nb2/3)O3–0.3PbTiO3 (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 [100]c surface under the electric field applied along [001]c direction. The PMN–0.3PT single crystal exhibits a rapid increase in piezoresponse at 100V/mm, which is related to R–MA phase transformation. At 90°C, the M and T001 phases coexist at 100V/mm, while T001 mono-domain appears at 300V/mm. The domain switching process here can be identified as (T100 or T010)→M→T001. The experimental results show that the phase state and domain structures of the crystal are closely related to the piezoelectric behaviors.
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