Abstract
Strain is generally known to increase the coercive field of a ferroelectric thin film as compared to a stress-free single crystal or a strain-relaxed film. We studied the coercive fields and remanent polarizations of (001)-oriented epitaxial barium titanate thin films using the phase-field approach. It is demonstrated, while the remanent polarization decreases as in-plane strain changes from being compressive to tensile, the variation of coercive field with strain is complicated. We noted more than two times drop in coercive field with a reduction of compressive strain of only ∼0.05%, which we attribute to the existence of multiple ferroelectric phases.
Original language | English (US) |
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Article number | 142907 |
Journal | Applied Physics Letters |
Volume | 92 |
Issue number | 14 |
DOIs | |
State | Published - 2008 |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)