Poling effect and piezoelectric response in high-strain ferroelectric 0.70Pb(Mg1/3Nb2/3)O3-0.30PbTiO3 crystal
Schmidt, V. Hugo
Ku, C. -S.
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In situ high-resolution synchrotron x-ray diffraction, dielectric permittivity, hysteresis loop, and polarization current, were used to investigate phase transitions of (211)-cut 0.70Pb(Mg1/3Nb2/3)O3–0.30PbTiO30.70Pb(Mg1/3Nb2/3)O3–0.30PbTiO3 single crystal before and after an electric (E)(E) field poling. A rhombohedral (R)–tetragonal (T)–cubic transition sequence was observed upon zero-field heating in both unpoled and poled samples. Before the R–T transition takes place, an extra dielectric and polarization current anomalies near 365 K were observed in the poled sample due to a transition of polarization ordering. The direct piezoelectric coefficient d33d33 exhibits a rapid increase for poling at E=1.0–1.3kV/cmE=1.0–1.3 kV/cm, followed by an overpoling behavior. The increment of polarization ordering plays an important role while the high piezoelectric response builds up.
H.-Y. Chen, C.-S. Tu, C.-M. Hung, R.R. Chien, V.H. Schmidt, C.-S. Ku, and H.-Y. Lee, “Poling effect and piezoelectric response in high-strain ferroelectric 0.70Pb(Mg1/3Nb2/3)O3-0.30PbTiO3 crystal,” Journal of Applied Physics 108, 044101 (2010).