Journal
APPLIED PHYSICS LETTERS
Volume 84, Issue 25, Pages 5225-5227Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1765742
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In this letter we report on the effect of thickness scaling in model PbZr0.2Ti0.8O3(PZT)/SrRuO3 heterostructures. Although theoretical models for thickness scaling have been widely reported, direct quantitative experimental data for ultrathin perovskite (<10 nm) films in the presence of real electrodes have still not been reported. In this letter we show a systematic quantitative experimental study of the thickness dependence of switched polarization in (001) epitaxial PZT films, 4 to 80 nm thick. A preliminary model based on a modified Landau Ginzburg approach suggests that the nature of the electrostatics at the ferroelectric-electrode interface plays a significant role in the scaling of ferroelectric thin films. (C) 2004 American Institute of Physics.
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