Ordered Mesoporous Thin Film Ferroelectrics of Biaxially Textured Lead Zirconate Titanate (PZT) by Chemical Solution Deposition
Ordered Mesoporous Thin Film Ferroelectrics of Biaxially Textured Lead Zirconate Titanate (PZT) by Chemical Solution Deposition
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DOI：
10.1021/cm500381g
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发表时间：
2014-03
影响因子：
8.6
通讯作者：
C. Reitz;P. M. Leufke;H. Hahn;T. Brezesinski
中科院分区：
文献类型：
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作者：
C. Reitz;P. M. Leufke;H. Hahn;T. Brezesinski
以聚（乙烯-丁烯）-嵌段-聚（环氧乙烷）二嵌段共聚物为结构导向剂，采用化学溶液沉积法在（001）取向的STO：Nb和LSMO/STO：Nb衬底上制备了具有高双轴织构和良好铁电性能的锆钛酸铅（PZT）薄膜纳米结构。通过电子显微镜、基于同步加速器的掠入射小角X射线散射、X射线衍射（包括θ-2θ、ω和φ扫描）、X射线光电子能谱、飞行时间二次离子质谱以及铁电极化开关和疲劳测量对样品进行了全面表征。结果表明：（1）具有16 nm孔径的立方相介观结构薄膜可以晶化生成单相钙钛矿结构PZT，并保持纳米级的有序性;（2）溶胶-凝胶法制备的PZT薄膜具有面内织构为1.9°，面外织构为1.5°;（3）薄膜的顶面富含Zr（界面层中的成分为1.5%）。
Lead zirconate titanate (PZT) thin film nanostructures with a high degree of biaxial texturing and good ferroelectric properties have been prepared by facile chemical solution deposition on (001)-oriented STO:Nb and LSMO/STO:Nb substrates using a poly(ethylene-co-butylene)-block-poly(ethylene oxide) diblock copolymer as structure-directing agent. The samples were thoroughly characterized by electron microscopy, synchrotron-based grazing incidence small-angle X-ray scattering, X-ray diffraction (including θ–2θ, ω, and φ scans), X-ray photoelectron spectroscopy, time-of-flight secondary ion mass spectrometry, and by ferroelectric polarization switching and fatigue measurements. We show that (1) the cubic mesostructured films with 16 nm diameter pores can be crystallized to produce single phase perovskite PZT with retention of nanoscale order, (2) the sol–gel derived material has an in-plane texture of ∼1.9° and an out-of-plane texture of ∼1.5°, and (3) the top surface is Zr-rich (the composition in the inte...