A study of flexoelectric coupling associated internal electric field and stress in thin film ferroelectrics
作者： Wenhui Ma
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摘要: By discussions in the framework of tensor representations and phenomenological theory, general piezoelectricity equations that incorporate direct inverse flexoelectric effects were analyzed interlink between flexoelectricity discovered. Due to coupling, mechanical strain gradient is equivalent internal electric field. In ferroelectrics above Curie temperature, it was shown theoretically associated field leads non-zero polarization without external It also (or field) an extra source stress. Magnitudes stress for heteroepitaxial thin films barium strontium titanate. Flexoelectric coupling expected intensify with reducing lateral dimensions thickness get large enough at nanoscale modify ferroelectric phase transitions functional response. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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