科研之友
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摘要
In epitaxial films of BaTiO3 with different thickness (20-400 nm) and in-plane biaxial strain (-0.7-0%), dynamic dielectric response was experimentally studied and analyzed. Sequence of phase transitions was identified as paraelectric-glasslike-ferroelectric, being in contrast to the static paraelectric-ferroelectric one. Slowing of dynamic off-center Ti disorder is suggested to be responsible for the glasslike phase. Possible influence of surface and strain on dipolar disorder is discussed.
- 出版日期2007-4
