The overpoling effect of alternating current poling on rhombohedral Pb(Mg1/3Nb2/3)O3-PbTiO3 single crystals

• DOI: 10.1063/5.0086057
• Publication Date: 2022-05-09T12:22:38Z
• Authors: Haotian Wan; Chengtao Luo; Hwang-Pill Kim; Ching-Chang Chung; Wei-Yi Chang; Yohachi Yamashita; Xiaoning Jiang
• Keywords: Poling; Hysteresis; Saturation (graph theory); Single domain

The overpoling effect of alternating current poling (ACP) was studied on [001]-orientated rhombohedral Pb(Mg1/3Nb2/3)O3-0.26PbTiO3 (PMN-0.26PT) single crystals. Our experimental results showed that the property enhancement from ACP remarkable only when cycle number (NL) kept low. When continued after saturation, dielectric and piezoelectric properties gradually dropped down to traditional direct poled levels or even lower. Such a decrease in material caused by large NL during defined as “overpoling ACP” this study. following lattice symmetry domain structure characterization studies were performed through x-ray diffraction (XRD) force microscopy (PFM) find origin effect. XRD measurements combined with temperature dependence demonstrated field-induced phase transition samples became overpoled. Further PFM illustrated density overpoled sample significantly lower than normal one, while “2R” configuration maintained process. In addition, hysteresis loop indicated decreases coercive fields. discovered could help us understand mechanisms optimize