TY - GEN

T1 - A practical model to analytically characterize the polarization hysteresis of ferroelectric capacitors

AU - Shrestha, Bikash

AU - Pieper, Ron

AU - Wondmagegn, Wudyalew

AU - Mao, Duo

AU - Mejia, Israel

AU - Stiegler, Harvey

AU - Gnade, Bruce E.

AU - Quevedo-Lopez, Manuel

PY - 2012

Y1 - 2012

N2 - 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.

AB - 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.

KW - Coercive field

KW - Ferroelectrics

KW - Hysteresis

KW - Landau coefficient

KW - Remnant polarization

KW - Spontaneous polarization

UR - http://www.scopus.com/inward/record.url?scp=84861213711&partnerID=8YFLogxK

U2 - 10.1109/SSST.2012.6195142

DO - 10.1109/SSST.2012.6195142

M3 - Contribución a la conferencia

AN - SCOPUS:84861213711

SN - 9781457714924

T3 - Proceedings of the Annual Southeastern Symposium on System Theory

SP - 40

EP - 44

BT - Proceedings of the 2012 44th Southeastern Symposium on System Theory, SSST 2012

T2 - 2012 44th Southeastern Symposium on System Theory, SSST 2012

Y2 - 11 March 2012 through 13 March 2012

ER -