Thermally activated switching kinetics in second-order phase transition ferroelectrics

Melvin Vopson, J. Blackburn, M. Cain, P. Weaver

    Research output: Contribution to journalArticlepeer-review


    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.
    Original languageEnglish
    Pages (from-to)024109
    Number of pages1
    JournalPhysical Review B
    Issue number2
    Publication statusPublished - 1 Jul 2010


    Dive into the research topics of 'Thermally activated switching kinetics in second-order phase transition ferroelectrics'. Together they form a unique fingerprint.

    Cite this