The model of the P(E) hysteresis in dielectric - ferroelectric bilayers and weak - strong ferroelectric bilayers is presented with the phase field modeling of the domain structure and P(E) curves in the compositionally graded m BaxSr(1-x)TiO3 - n BaTiO3 bilayers on SrTiO3 substrate. It is shown that the hysteresis loop depends on the film composition and structure and varies from simple rectangular to complex. The coercive field and the single-domain to polydomain transition depend on the film composition and structure. There is a significant difference between the behavior of through thickness domain structures and columnar domain structures localized in one layer. Copyright

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Keywords bilayer ferroelectric films, ferroelectric domain structures, Ferroelectric thin films, graded ferroelectric films
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Journal Integrated Ferroelectrics
Artemev, A, & Roytburd, A.L. (A. L.). (2011). Domain structure and P(E) hysteresis in m BaxSr (1-x)TiO3 - N BaTiO3 bilayers on SrTiO 3 substrate. In Integrated Ferroelectrics (Vol. 126, pp. 125–141). doi:10.1080/10584587.2011.575016