TITLE

Direct observation of two-step polarization reversal by an opposite field in a substrate-free piezoelectric thin sheet

AUTHOR(S)
Chun-Yi Hsieh; Yang-Fang Chen; Wan Y. Shih; Qing Zhu; Wei-Heng Shih
PUB. DATE
March 2009
SOURCE
Applied Physics Letters;3/30/2009, Vol. 94 Issue 13, p131101
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The domain switching behavior of a substrate-free lead magnesium niobate-lead titanate thin sheet by an opposite electric field (E) was examined by piezoresponse force microscopy. It is shown that the polarization reversal process involved two steps. First, the polarization switched from the initial normal direction to an in-plane direction at -E<5 kV/cm. Second, at -E>5 kV/cm, the polarization was further switched from the in-plane direction to the opposite field direction. The preference of the in-plane polarization at -5 kV/cm was attributed to the thin-sheet geometry, which also manifested itself as a maximum in dielectric constant at the same field.
ACCESSION #
37321930

 

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