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Ferroelectric materials have large macroscopic electrical dipole polarizations.
Such materials show very special anisotropic properties and they are, for example, central to the design of nonlinear optical materials. Schematic diagrams of dipole alignments in the crystal. Organic ferroelectrical materials are hard to make. Think about it. Simple ideas of electrostatics show that neighboring dipoles are electrostiaclly best when they are anti-parallel.