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Publication Citation: Piezoelectric Response of Nanoscale PbTiO3 in Composite PbTiO3-CoFe2O4 Epitaxial Films

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Author(s): Igor Levin; Tan Zhuopeng; Alexander Roytburd; Katyayani Seal; Brian Rodriguez; Stephen Jesse; Sergei Kalinin; Art Baddorf;
Title: Piezoelectric Response of Nanoscale PbTiO3 in Composite PbTiO3-CoFe2O4 Epitaxial Films
Published: August 15, 2008
Abstract: Piezoelectric properties of PbTiO3 in 1/3PbTiO3-2/3CoFe2O4 transverse epitaxial nanostructures on differently oriented SrTiO3 were analyzed using conventional and switching-spectroscopy piezoelectric force microscopy. The results confirmed that the individual PbTiO3 nanocolumns in the CoFe2O4 matrix exhibit a detectable piezoelectric response regardless of substrate orientation. For the {100} and {110} orientations, a bias of 10V produced ferroelectric domain switching; however, no switching was observed for the {111} films. Small values of piezoelectric constants dzz(100) 11 pm/V, dzz(110) 5 pm/V, and dzz(111) 3 pm/V are attributed to the weak intrinsic response of the nano -PbTiO3 under the strong mechanical and depolarizing-field constraints in the composite films.
Citation: Applied Physics Letters
Volume: 93
Issue: 7
Keywords: piezoelectrics; nanoscale; epitaxial films
Research Areas: Nanomaterials
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