Abstract :
Epitaxial SrTiO3 thin films were deposited on single crystalline Rh substrates by pulsed laser deposition. The tetragonally stained structure of the SrTiO3 thin films with a c/a ratio of 1.04 was confirmed by x-ray diffraction experiments. The SrTiO3 thin films exhibited good ferroelectric properties with a high remanent polarization (2Pr) of 8 μC/cm2 and a canonical ferroelectric piezoresponse hysteresis loop at room temperature. We estimated a high activation electric field of about 6.4 MV/cm for domain wall creeping. This activation electric field is higher than that of typical ferroelectric materials such as PbTiO3.
