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Abstract
The impact of flexoelectricity on the imprint behavior in ferroelectric thin films has been investigated within the framework of Landau–Khalatnikov theory, by incorporating the coupling effect between the stress gradient and polarization. It is found that the imprint phenomenon can be in part induced by flexoelectricity. In the presence of flexoelectric coupling, the compressive stress shifts the hysteresis loop to the negative electric field axis, but the tensile stress shifts it to the opposite direction, which is in good agreement with experimental result. Besides, the characteristic length of stress distribution has a significant influence on the upper part of hysteresis loop. It highlights the pressing need to avoid the stress gradient in order to prevent degradation of device performance in ferroelectric thin films.
Published Version
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