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The Effect of the Surface Layer on the Dielectric Constant of (Pb, La)TiO_3 Thin Films

机译：表面层对（Pb，La）TiO_3薄膜介电常数的影响

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摘要

(Pb, La)TiO_3 (PLT) ferroelectric thin films are one of the promising candidates for applications in dynamic random memory and pyroelectric detectors, etc. However, the chemical composition in the surface layer of thin films is usually different from that in the "bulk" region of the thin films. For instance, it has been reported that there is Pb, Ti, or La enrichment in the surface layer of the (Pb, La)TiO_3 thin films. According to a numerical modeling using effective-medium theory, which was developed in our group, we discussed the effect of the surface layer on the dielectric constant of (Pb, La)TiO_3 thin films. The effect of Pb, Ti, or La enrichment in the surface layer on the dielectric constant of PLT thin films was discussed. And a case of the "upgraded" and the "down-graded" thin films was expatiated and discussed.
机译：（Pb，La）TiO_3（PLT）铁电薄膜是在动态随机存储器和热释电探测器等应用中很有希望的候选材料之一。但是，薄膜表面层的化学成分通常不同于“薄膜的“大块”区域。例如，据报道在（Pb，La）TiO_3薄膜的表面层中存在Pb，Ti或La富集。根据我们小组开发的使用有效介质理论的数值模型，我们讨论了表面层对（Pb，La）TiO_3薄膜介电常数的影响。讨论了表面层中Pb，Ti或La富集对PLT薄膜介电常数的影响。阐述并讨论了“升级”和“降级”薄膜的情况。

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