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X-Ray scan for period superlattice. (Inset) X-ray -scan of the (111) zero order peak of the superlattice.
Polarization-electric field plots for superlattices with four different periodicities measured at a frequency of . (Inset) Polarization hysteresis for the single component film.
values superlattices at different voltages from PUND measurements at fixed pulse widths of . (Inset) values for the four superlattices at the highest applied field plotted as a function of . The blue line is drawn as a guide for the eyes.
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