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XRD scans of the films on (a) and (b) YSZ(111) substrates. The inset in (a) shows a rocking curve, which was recorded around the peak. scans of the peaks for epitaxial hexagonal films on (c) and (d) YSZ(111) substrates.
Polarization vs electric field hysteresis loops of the hexagonal films measured at (a) 25 and (b) . Dielectric constant vs electric field curves are shown in the upper left insets. The vs electric field plots are given in the lower right insets.
Contour map of the remnant polarization values as a function of temperature and maximum applied electric field. The dashed line shows a boundary between the ferroelectric and antiferroelectriclike regions determined from the number of inflection points in the vs electric field plots.
(a) Temperature-dependent magnetization curves measured with a magnetic field along the axis after ZFC and FC. (b) Temperature-dependent magnetization curves with a magnetic field applied along the substrate. As shown in the inset, the magnetization curve indicates two anomalies around 40 and , respectively. (c) Magnetic-field-dependent magnetization curves at 4.2, 50, and . The inset shows an enlarged picture of the low-field data taken at with a clear hysteresis.
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