Study of orientation effect on nanoscale polarization in BaTiO3 thin films using piezoresponse force microscopy
نویسندگان
چکیده
We have investigated the effect of texture on in-plane sIPPd and out-of plane sOPPd polarizations of pulsed-laser-deposited BaTiO3 thin films grown on Pt and La0.5Sr0.5CoO3 sLSCOd buffered Pt electrodes. The OPP and IPP polarizations were observed by piezoresponse force microscopy sPFMd for three-dimensional polarization analyses in conjunction with conventional diffraction methods using x-ray diffraction and reflection high energy electron diffraction measurements. BaTiO3 films grown on Pt electrodes exhibited highly s101d preferred orientation with higher IPP component whereas BaTiO3 film grown on LSCO/Pt electrodes showed s001d and s101d orientations with higher OPP component. Measured effective d33 values of BaTiO3 films deposited on Pt and LSCO/ Pt electrodes were 14.3 and 54.0 pm/V, respectively. Local piezoelectric strain loops obtained by OPP and IPP-PFM showed that piezoelectric properties were strongly related to film orientation. © 2005 American Institute of Physics. fDOI: 10.1063/1.1923173g
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