Study of microscopic piezoelectricity of (Pb 0.76Ca 0.24)TiO 3 thin films
Abstract
Piezoelectric response AFM was used to characterize (Pb 0.76Ca 0.24)TiO 3 (PCT) thin films prepared by sol-gel method. Compared to lead zirconate titanate (PZT) films, better piezoelectric response contrast was obtained for the PCT film with relatively smaller remanent polarisation. This is attributed to the large electrostriction coefficient and weak clamping effect by substrate, which is related to the high piezoelectric anisotropy of PCT material. Remanent polarisation and spontaneous polarisation images reveal the existence of ferroelectricity in the PCT film with a thickness of 40 nm.
- Publication:
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Physics Letters A
- Pub Date:
- February 2002
- DOI:
- 10.1016/S0375-9601(02)00023-3
- Bibcode:
- 2002PhLA..294..217G