1. Study of orientation effect on nanoscale polarization in BaTiO3 thin films using piezoresponse force microscopy
- Author
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Kim, Il-Doo, Avrahami, Ytshak, Tuller, Harry L., Park, Young-Bae, Dicken, Matthew J., Atwater, Harry A., Kim, Il-Doo, Avrahami, Ytshak, Tuller, Harry L., Park, Young-Bae, Dicken, Matthew J., and Atwater, Harry A.
- Abstract
We have investigated the effect of texture on in-plane (IPP) and out- of plane (OPP) polarizations of pulsed-laser-deposited BaTiO3 thin films grown on Pt and La0.5Sr0.5CoO3 (LSCO) buffered Pt electrodes. The OPP and IPP polarizations were observed by piezoresponse force microscopy (PFM) 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 (101) preferred orientation with higher IPP component whereas BaTiO3 film grown on LSCO/Pt electrodes showed (001) and (101) orientations with higher OPP component. Measured effective d(33) 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.
- Published
- 2005