Path to finding the critical thickness for memory in thin ferroelectric films

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The finite screening length by real metallic electrodes, albeit very small (<1A), results in finite depolarizing field that tends to split the film into domains. In very thin ferroelectric films the domain structure reduces to sinusoidal distribution of polarization considered first in the 1980s. We discuss the phase transition between this structure and a single domain state and show that it is first order, if it exists at all. The alternative possibility is that the single domain state at zero bias voltage would be metastable for all temperatures in most systems. This scenario defines a path towards solution to a problem of finding parameters of a system that can sustain the ferroelectric memory over a desired period of time.
5 pages, 3 figures. Fig.2 added showing tricritical behavior of thin FE films with real electrodes (v3)

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Materials Science, Statistical Mechanics

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http://salesiana.dossiersoluciones.com/handle/123456789/167974

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0708.3273
 http://arxiv.org/abs/0708.3273

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arXiv