Abstract
The ferroelectric and piezoelectric properties of (100)-oriented BiScO3–PbTiO3 (BSPT) thin films were investigated. (100)-oriented 0.34BiScO3–0.66PbTiO3 thin films were synthesized on Pt(111)∕Ti∕SiO2∕Si(111) substrates using a modified sol-gel method. Saturated polarization hysteresis loops were observed, showing a remanent polarization of 33μC∕cm2. The dielectric constant and loss for the thin films were 1200 and 5%, respectively. The Curie temperature appeared at 435°C, over 80°C higher than that of the Pb(Zr,Ti)O3 (PZT) thin films. The local effective piezoelectric coefficient d33* was approximately 70pm∕V, which was comparable to that of the highly (100)-oriented PZT thin films.
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