Surface and size effects on phase diagrams of ferroelectric thin films

Ma, D. C.; Yue Zheng; Woo, C. H.
December 2009
Applied Physics Letters;12/28/2009, Vol. 95 Issue 26, p262901
Academic Journal
Taking into account effects of the surface and depolarization field, we investigated the “misfit strain-temperature” phase diagrams of ferroelectric thin film by using the time-dependent Ginzburg–Landau theory. The simulation results show that the surface effect can shift the phase diagram to lower temperature. More importantly, effect of the depolarization field obviously shrinks the c-phase, and dominates the paraelectric and aa-phase in the phase diagram.


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