Artificial superlattices composing of alternatively stacked tetragonal (T) and rhombohedral (R)(1x)Pb(Mg13Nb23)O3xPbTiO3 phases have been grown. Large dielectric constant enhancement, strong structural dependences of ferroelectric properties including remnant polarization, coercive field, phase transition temperature, and large nonlinear dielectric property enhancement, were measured. These enhancements were explained by the long-range spontaneous polarization coupling and by the increased internal strains inside the superlattices.

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