ABSTRACT
Piezoresponse force microscopy (PFM) and scanning probe acoustic microscopy (SPAM) were combined to characterize locally piezoelectric and elastic phenomena of domain structures in lead-free Bi4Ti3O12 piezoelectric ceramics and ferroelectric Pb(Mg1/3Nb2/3)O3-PbTiO3 single crystals. The acoustic images of ferroelectric domain were firstly visualized by SPAM at low frequency below 10 kHz. The domain imaging mechanisms are ascribed to the elastic response of ferroelectric domain to local contact stiffness difference of the individual domains in response to local elastic stress fields. An interesting proportional relationship was revealed between the local piezoelectricity and elasticity for ferroelectric domains.
ACKNOWLEDGMENT
This work is supported by State Key Development Program for Basic Research of China (Grant No. 2002CB613307).