Nonlinearity of a ferroelectric layer described using a planar capacitor model

The accurate evaluation of ferroelectric thin films operated with interdigitated electrodes is quite a complex task. In this article, we show how to correct the electric field and the capacitance in order to obtain identical polarization and CV loops for all geometrical variants. The simplest model is compared with corrections derived from Schwartz-Christoffel transformations, and with finite element simulations. The correction procedure is experimentally verified, giving almost identical curves for a variety of gaps and electrode widths. It is shown that the measured polarization change corresponds to the average polarization change in the center plane between the electrode fingers, thus at the position where the electric field is most homogeneous with respect to the direction and size. The question of maximal achievable polarization in the various possible textures, and compositional types of polycrystalline lead zirconate titanate thin films is revisited. In the best case, a soft (110) textured thin film with the morphotropic phase boundary composition should yield a value of 0.95Ps, and in the worst case, a rhombohedral (100) textured thin film should deliver a polarization of 0.74Ps.

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Modeling of Dependence of Dielectric Parameters of Double-layer Ferroelectric Structure on Temperature and Layers Thickness

Pecherskaya

Zinchenko

Golubkov

et al. 2018

2018 Moscow Workshop on Electronic and Networking Technologies (MWENT)

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Nonlinearity of a ferroelectric layer described using a planar capacitor model

Cited by 3 publications

References 6 publications

Experimental evidence of correctness of improved model of ferroelectric planar capacitor

Experimental evidence of correctness of improved model of ferroelectric planar capacitor

Characterization methodology for lead zirconate titanate thin films with interdigitated electrode structures

Modeling of Dependence of Dielectric Parameters of Double-layer Ferroelectric Structure on Temperature and Layers Thickness

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