1. Impact of alternating current electric field poling on piezoelectric and dielectric properties of Pb(In1/2Nb1/2)O3–Pb(Mg1/3Nb2/3)O3–PbTiO3 ferroelectric crystals.
- Author
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Liu, Jinfeng, Qiu, Chaorui, Qiao, Liao, Song, Kexin, Guo, Haisheng, Xu, Zhuo, and Li, Fei
- Subjects
ALTERNATING currents ,FERROELECTRIC crystals ,DIELECTRIC properties ,ELECTRIC fields ,FERROELECTRIC ceramics ,PIEZOELECTRICITY - Abstract
Compared with the state-of-the-art Pb(Zr,Ti)O
3 ceramics, relaxor-PbTiO3 (PT) based ferroelectric single crystals possess much higher piezoelectricity, thus receiving considerable attention from the ferroelectric community. Recently, it was found that the alternating current electric field poling (AC-poling) could further improve the piezoelectricity of [001]-poled rhombohedral (R) relaxor-PT single crystals. In this work, we investigated the domain structures and electromechanical properties of alternating current electric field poled (AC-poled) relaxor ferroelectric Pb(In1/2 Nb1/2 )O3 –Pb(Mg1/3 Nb2/3 )O3 –PbTiO3 (PIN–PMN–PT) crystals with different orientations and phase structures, including [001]-oriented R PIN–PMN–PT (23/47/30), [011]-oriented R PIN–PMN–PT (23/47/30), and [001]-oriented monoclinic (MC ) PIN–PMN–PT (22/44/34) single crystals. We found that the piezoelectric coefficient (d33 ), free dielectric permittivity (ɛ33 T /ɛ0 ), and clamped dielectric permittivity (ɛ33 S /ɛ0 ) for AC-poled [001]-oriented R PIN–PMN–PT (23/47/30) crystals were improved by 24.4%, 22.6%, and 8.5%, respectively, when compared with the direct current electric field poled (DC-poled) counterparts. This phenomenon is attributed to the increase of domain size according to the observations from polarized light microscopy. Nevertheless, for [011]-poled R PIN–PMN–PT and [001]-poled MC PIN–PMN–PT crystals, the dielectric permittivities and piezoelectric coefficients were decreased a bit by AC-poling, being attributed to the depolarization phenomenon caused by the AC electric field. This work demonstrates that impacts of AC-poling on the properties of ferroelectrics are highly related to the orientation and phase of ferroelectric crystals. [ABSTRACT FROM AUTHOR]- Published
- 2020
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