2024 journal article
Comparison of field-cooling DC poling and AC poling for lead perovskite relaxor-PbTiO<sub>3</sub> single crystals grown by a continuous feeding Bridgman process
JAPANESE JOURNAL OF APPLIED PHYSICS, 63(4).
author keywords: lead magnesium niobate titanate; relaxor; lead perovskite; poling; dielectric constant; piezoelectric constant; domain structure
iopscience.iop.org (publisher PDF)
Source: Web Of Science
Added: April 15, 2024
Abstract We investigated the effectiveness of poling processes for Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) single crystals (SCs) produced using the continuous feeding Bridgman method that is known with a high property uniformity. The studied four poling processes are: (I) DC poling (DCP), (II) low voltage field cooling DCP (LV-FCP), (III) high voltage field cooling DCP (HV- FCP), and (IV) mid temperature AC poling (MT-ACP). The highest free dielectric constant (ε33T/ε0) and piezoelectric constant (d33) were obtained by the MT-ACP (ε33T/ε0 = 11000, d33 = 3000 pC/N), followed by LV-FCP (ε33T/ε0 = 7500, d33 = 2400 pC/N), HV-FCP (ε33T/ε0 = 6250, d33 = 1850 pC/N), and DCP (ε33T/ε0 = 6200, d33 = 1800 pC/N). The LV-FCP SC showed a 21% and 33% increase in ε33T/ε0 and d33 compared to those of DCP SC, however, not as much as the 77% and 67% improvement of the MT-ACP SC. These results provide a guidance for SC transducers.