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I discuss preparation of nano-phase ferroelectrics for gigabit memories and emphasise three physics aspects: The lack of confinement energies in these materials (which is a blessing, because it means contact potentials at the metal electrode interfaces are size-independent); the enhanced leakage currents in nano-crystals as compared with macroscopic crystals; and the retention failure due to nucleation of revered-polarity 180-degree domains at twin boundaries.
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