Electrical poling below coercive field for large piezoelectricity | Zendy

Hanzheng Guo | Zendy; Cheng Ma | Zendy; Xiaoming Liu | Zendy; Xiaoli Tan | Zendy

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Electrical poling below coercive field for large piezoelectricity

Author(s) -

Hanzheng Guo,

Cheng Ma,

Xiaoming Liu,

Xiaoli Tan

Publication year - 2013

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4794866

Subject(s) - poling , piezoelectricity , coercivity , materials science , condensed matter physics , ferroelectricity , electric field , polarization (electrochemistry) , ferroelectric ceramics , crystallite , ceramic , composite material , optoelectronics , dielectric , physics , chemistry , quantum mechanics , metallurgy

Isotropic polycrystalline ferroelectric ceramics have to be electrically poled to develop a net macroscopic polarization and hence piezoelectricity. It is well accepted that a sufficient poling can only be realized under an electric field that is much higher than the coercive field. In this study, we observed in (Bi1/2Na1/2)TiO3-BaTiO3 ceramics that large piezoelectricity can develop at poling fields far below the measured coercive field. Using in situ transmission electron microscopy, such an unusual behavior, is interpreted with the polarization alignment of polar nanodomains in the non-ergodic relaxor phase.

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