TITLE

Piezoelectric response of nanoscale PbTiO3 in composite PbTiO3-CoFe2O4 epitaxial films

AUTHOR(S)
Tan, Zhuopeng; Roytburd, Alexander L.; Levin, Igor; Seal, Katyayani; Rodriguez, Brian J.; Jesse, Stephen; Kalinin, Sergei; Baddorf, Art
PUB. DATE
August 2008
SOURCE
Applied Physics Letters;8/18/2008, Vol. 93 Issue 7, p074101
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
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 ±10 V 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 strong mechanical and depolarizing-field constraints in the composite films.
ACCESSION #
34135652

 

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