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Effect of external mechanical stress on the domain structure of Pb(Zr0.35Ti0.65)O-3 thin films

机译:外部机械应力对Pb(Zr0.35Ti0.65)O-3薄膜畴结构的影响

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Landau-Devonshire theory is used to investigate the effect of external mechanical stress (or strain) on domain structure and the remanent polarization of Pb(Zr0.35Ti0.65)O-3 (PZT) thin films, by considering the competition between the external stress and the intrinsic stresses. A set of intrinsic stress functions in PZT film is obtained by solving elastic mechanical equations. At room temperature, the intrinsic stresses may lead to an alternate a/c/a/c domain structure. While an external in-plane tensile stress increases the Gibbs free energy of the c-phase and decreases that of a-phase. Parts of the c-domains turn to a-domains, so as to reduce the remanent polarization of the PZT films. (C) 2005 Elsevier Ltd. All rights reserved.
机译:兰道-德文郡理论被用来研究外部机械应力(或应变)对Pb(Zr0.35Ti0.65)O-3(PZT)薄膜的畴结构和剩余极化的影响,同时考虑了外部之间的竞争。压力和内在压力。通过求解弹性力学方程,获得了PZT薄膜的一组固有应力函数。在室温下,固有应力可能会导致交替的a / c / a / c域结构。外部平面内拉应力会增加c相的吉布斯自由能,而降低a相的吉布斯自由能。部分c畴变成a畴,以减少PZT膜的剩余极化。 (C)2005 Elsevier Ltd.保留所有权利。

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