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Andrew T. Mulder, Nicole A. Benedek, James M. Rondinelli and Craig J. Fennie Turning ABO3 Antiferroelectrics into Ferroelectrics: Design Rules for Practical Rotation-Driven Ferroelectricity in Double Perovskites and A3B2O7 Ruddlesden-Popper Compounds Advanced Functional Materials 23

Version of Record online: 6 MAY 2013 | DOI: 10.1002/adfm.201300210

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A microscopic theory for hybrid improper ferroelectrics is reported, whereby a spontaneous polarization emerges from an antiferroelectric state owing to the combination of octahedral rotations and cation ordering. A materials design framework is constructed based on crystal-chemistry descriptors rooted in group theory, enabling the design of artificial oxides with large electric polarizations and small energetic switching barriers.

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