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Thermally activated switching kinetics in second-order phase transition ferroelectrics

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Thermally activated switching kinetics in second-order phase transition ferroelectrics. / Vopson, Melvin; Blackburn, J.; Cain, M.; Weaver, P.

In: Physical Review B, Vol. 82, No. 2, 01.07.2010, p. 024109.

Research output: Contribution to journalArticlepeer-review

Harvard

Vopson, M, Blackburn, J, Cain, M & Weaver, P 2010, 'Thermally activated switching kinetics in second-order phase transition ferroelectrics', Physical Review B, vol. 82, no. 2, pp. 024109. https://doi.org/10.1103/PhysRevB.82.024109

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Author

Vopson, Melvin ; Blackburn, J. ; Cain, M. ; Weaver, P. / Thermally activated switching kinetics in second-order phase transition ferroelectrics. In: Physical Review B. 2010 ; Vol. 82, No. 2. pp. 024109.

Bibtex

@article{94b764c16c13459cad11f1ed2bf23521,
title = "Thermally activated switching kinetics in second-order phase transition ferroelectrics",
abstract = "The understanding of electric polarization dynamics is a complex problem of critical importance for both fundamental studies of ferroelectric materials and their applications to nonvolatile memories. In this paper we focus on second-order phase transition ferroelectrics, as defined in Landau—Devonshire framework, which display a particular free-energy profile as a function of the ordering parameter, that has two energy minima separated by an energy barrier. Assuming a domain nucleation polarization reversal mechanism, this particular energy dependence allowed us to introduce an electric polarization reversal model based on the nonequilibrium statistics of the domain nucleation process. Using the Pauli master equation we have determined the time-dependent occupation probabilities of the polarization states of the nucleation sites, which can be used to generate analytical expressions for the temporal dependence of the reversed polarization, transient switching current, and the switching time. In addition, we have derived an analytic expression for the time and thermal dependence of the coercive field and we discuss the depolarization field effects on the polarization reversal dynamics in thin-film ferroelectric structures.",
author = "Melvin Vopson and J. Blackburn and M. Cain and P. Weaver",
year = "2010",
month = jul,
day = "1",
doi = "10.1103/PhysRevB.82.024109",
language = "English",
volume = "82",
pages = "024109",
journal = "Physical Review B",
issn = "1098-0121",
publisher = "American Institute of Physics Publising LLC",
number = "2",

}

RIS

TY - JOUR

T1 - Thermally activated switching kinetics in second-order phase transition ferroelectrics

AU - Vopson, Melvin

AU - Blackburn, J.

AU - Cain, M.

AU - Weaver, P.

PY - 2010/7/1

Y1 - 2010/7/1

N2 - The understanding of electric polarization dynamics is a complex problem of critical importance for both fundamental studies of ferroelectric materials and their applications to nonvolatile memories. In this paper we focus on second-order phase transition ferroelectrics, as defined in Landau—Devonshire framework, which display a particular free-energy profile as a function of the ordering parameter, that has two energy minima separated by an energy barrier. Assuming a domain nucleation polarization reversal mechanism, this particular energy dependence allowed us to introduce an electric polarization reversal model based on the nonequilibrium statistics of the domain nucleation process. Using the Pauli master equation we have determined the time-dependent occupation probabilities of the polarization states of the nucleation sites, which can be used to generate analytical expressions for the temporal dependence of the reversed polarization, transient switching current, and the switching time. In addition, we have derived an analytic expression for the time and thermal dependence of the coercive field and we discuss the depolarization field effects on the polarization reversal dynamics in thin-film ferroelectric structures.

AB - The understanding of electric polarization dynamics is a complex problem of critical importance for both fundamental studies of ferroelectric materials and their applications to nonvolatile memories. In this paper we focus on second-order phase transition ferroelectrics, as defined in Landau—Devonshire framework, which display a particular free-energy profile as a function of the ordering parameter, that has two energy minima separated by an energy barrier. Assuming a domain nucleation polarization reversal mechanism, this particular energy dependence allowed us to introduce an electric polarization reversal model based on the nonequilibrium statistics of the domain nucleation process. Using the Pauli master equation we have determined the time-dependent occupation probabilities of the polarization states of the nucleation sites, which can be used to generate analytical expressions for the temporal dependence of the reversed polarization, transient switching current, and the switching time. In addition, we have derived an analytic expression for the time and thermal dependence of the coercive field and we discuss the depolarization field effects on the polarization reversal dynamics in thin-film ferroelectric structures.

U2 - 10.1103/PhysRevB.82.024109

DO - 10.1103/PhysRevB.82.024109

M3 - Article

VL - 82

SP - 024109

JO - Physical Review B

JF - Physical Review B

SN - 1098-0121

IS - 2

ER -

ID: 195937