In situ transmission electron microscopy studies of electric-field-induced phenomena in ferroelectrics
作者： Xiaoli Tan , Hui He , Jian-Ku Shang
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摘要: High electric fields were delivered to specimens during imaging in the transmission electron microscopy (TEM) chamber reveal details of field-induced phenomena ferroelectric oxides. These include polarization switching nanometer-sized domains and grain boundary cavitatio ni n a commercial lead zirconate titanate (PZT) polycrystalline ceramic, domain wall fracture Pb(Mg1/3Nb2/3)O3–PbTiO3 single crystal, transformation incommensurate modulations Pb0.99Nb0.02[(Zr1�xSnx)1�yTiy]0.98O3 (PZST100x/ 100y/2) ceramics. In PZT cavitation process was uncovered for intergranular fracture. preexisting crack observed deflect follow 90° wall, indicating presence severe incompatible piezoelectric strains at wall. antiferroelectric PZST ceramics, antiferroelectric-to-ferroelectric phase accompanied with disappearance modulations.
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