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Flexoelectric effect in the reversal of self-polarization and associated changes in the electronic functional properties of bifeo3 thin films

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Title: Flexoelectric effect in the reversal of self-polarization and associated changes in the electronic functional properties of bifeo3 thin films

Author(s): Byung Chul Jeon; Daesu Lee; Myang Hwan Lee; Sang Mo Yang; Seung Chul Chae; Tae Kwon Song; Sang Don Bu; Jin-Seok Chung; Jong-Gul Yoon; Tae Won Noh

Subject: Flexoelectric, ; Flexoelectric effects, ; Flexoelectricity, ; Functional properties, ; Interfacial effects, ; Self polarization, ; Strain gradients, ; Thin films, ; Polarization

Abstract: Flexoelectricity can play an important role in the reversal of the self-polarization direction in epitaxial BiFeO3 thin films. The flexoelectric and interfacial effects compete with each other to determine the self-polarization state. In Region I, the self-polarization is downward because the interfacial effect is more dominant than the flexoelectric effect. In Region II, the self-polarization is upward, because the flexoelectric effect becomes more dominant than the interfacial effect. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.