Abstract
The problem of critical size in ferroelectric crystals and films is considered within the mean-field theory. It is shown that, when the boundary conditions are correctly chosen, the critical size can be either very small or even absent; i.e., ferroelectricity can exist in one unit cell.
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Dedicated to the memory of V.L. Indenbom
Original Russian Text © V.M. Fridkin, 2009, published in Kristallografiya, 2009, Vol. 54, No. 6, pp. 965–967.
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Fridkin, V.M. Mean-field theory about the critical size in ferroelectricity. Crystallogr. Rep. 54, 917–919 (2009). https://doi.org/10.1134/S1063774509060029
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DOI: https://doi.org/10.1134/S1063774509060029