The ferroelectric and piezoelectric properties of (001) BiScO3–PbTiO3 epitaxial films were investigated. Epitaxial films 1 μm thick were grown by pulsed laser deposition using ceramic targets of (1−x)BiScO3–xPbTiO3 (x=0.5) at substrate temperatures of 700 °C on (100) SrRuO3/(100)LaAlO3 substrates. Well-saturated hysteresis loops with a remanent polarization of 36 μC/cm2 were observed. The films had a room temperature dielectric constant of 800, tan δ=0.09 and a maximum permittivity of 3600 at 460 °C. The room temperature e31f piezoelectric coefficient was −9 C/m2. The piezoelectric properties obtained were comparable to those of Pb(Zr,Ti)O3 or relaxor ferroelectric-PbTiO3 films.
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Yoshimura et al. (2002) studied this question.
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