A practical model to analytically characterize the polarization hysteresis of ferroelectric capacitors

Bikash Shrestha, Ron Pieper, Wudyalew Wondmagegn, Duo Mao, Israel Mejia, Harvey Stiegler, Bruce E. Gnade, Manuel Quevedo-Lopez

Research output: Contribution to conferencePaper

Abstract

A simulation based comparative study of the polarization hysteresis of the ferroelectric capacitor using various ferroelectric models is presented. A 2-dimensional finite element device-level model was implemented using SILVACO's ATLAS device simulator to generate the polarization hysteresis characteristics for Au/Poly(vinylidene fluoride-trifluoroethylene)/Au metal-insulator-metal (MIM) device. Landau free energy expression for electric field in terms of polarization is also implemented in the MATLAB to produce the polarization hysteresis curve of polycrystalline ferroelectrics. The main drawback of these models was their inability to predict polarization saturation at the same electric field limits for which the experimental device was saturating. A new model for ferroelectric hysteresis based on curve fitting algorithm is derived that forces the polarization to be saturated at desired electric field. The MATLAB simulation of this model and the experimental hysteresis is compared which shows an excellent level of agreement. © 2012 IEEE.
Original languageAmerican English
Pages40-44
Number of pages5
DOIs
StatePublished - 23 May 2012
Externally publishedYes
EventProceedings of the Annual Southeastern Symposium on System Theory -
Duration: 23 May 2012 → …

Conference

ConferenceProceedings of the Annual Southeastern Symposium on System Theory
Period23/05/12 → …

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