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Polarization dynamics and non-equilibrium switching processes in ferroelectrics.

Vopsaroiu, M; Weaver, P M; Cain, M G; Reece, M J*; Chong, K B* (2011) Polarization dynamics and non-equilibrium switching processes in ferroelectrics. IEEE Trans. Microw. Theory Tech., 58 (9). pp. 1867-1873.

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Time and thermal dependent effects are critical for the operation of non-volatile memories based on ferroelectrics. In this paper we assume a domain nucleation process of the polarization reversal and we discuss the polarization dynamics in the framework of a non-equilibrium statistical model. This approach yields analytical expressions, which can be used to explain a wide range of time and thermal dependent effects in ferroelectrics. Domain wall velocity derived in this work is consistent with a domain wall creep behavior in ferroelectrics. In the limiting case of para-electric equilibrium, the model yields the well know Curie law. We also present experimental P-E loops data obtained for soft ferroelectrics at various temperatures. The experimental coercive fields at various temperatures are well predicted by the coercive field formula derived in our theory.

Item Type: Article
Subjects: Advanced Materials
Advanced Materials > Functional Materials
Identification number/DOI: 10.1109/TUFFC.2011.2025
Last Modified: 02 Feb 2018 13:14
URI: http://eprintspublications.npl.co.uk/id/eprint/5257

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