In situ Transmission Electron Microscopy Studies of Electric-field-induced Phenomena in Ferroelectrics | Zendy

Xiaoli Tan | Zendy; Hui He | Zendy; Jian-Ku Shang | Zendy

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In situ Transmission Electron Microscopy Studies of Electric-field-induced Phenomena in Ferroelectrics

Author(s) -

Xiaoli Tan,

Hui He,

Jian-Ku Shang

Publication year - 2005

Publication title -

journal of materials research/pratt's guide to venture capital sources

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.788

H-Index - 148

eISSN - 0884-2914

pISSN - 0884-1616

DOI - 10.1557/jmr.2005.0213

Subject(s) - materials science , ferroelectricity , electric field , lead zirconate titanate , crystallite , piezoelectricity , transmission electron microscopy , ceramic , antiferroelectricity , grain boundary , ferroelectric ceramics , condensed matter physics , composite material , microstructure , metallurgy , optoelectronics , nanotechnology , dielectric , physics , quantum mechanics

High electric fields were delivered to specimens during imaging in the transmission electron microscopy (TEM) chamber to reveal details of electric field-induced phenomena in ferroelectric oxides. These include the polarization switching in nanometer-sized ferroelectric domains and the grain boundary cavitatio ni n a commercial lead zirconate titanate (PZT) polycrystalline ceramic, the domain wall fracture in a Pb(Mg1/3Nb2/3)O3–PbTiO3 single crystal, and the transformation of incommensurate modulations in Pb0.99Nb0.02[(Zr1xSnx)1yTiy]0.98O3 (PZST100x/ 100y/2) polycrystalline ceramics. In the PZT ceramic, a cavitation process was uncovered for the electric field-induced intergranular fracture. In the ferroelectric single crystal, a preexisting crack was observed to deflect and to follow a 90° domain wall, indicating the presence of severe incompatible piezoelectric strains at the domain wall. In the antiferroelectric PZST ceramics, the electric field-induced antiferroelectric-to-ferroelectric phase transformation was accompanied with the disappearance of incommensurate modulations.

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