期刊
APPLIED SURFACE SCIENCE
卷 363, 期 -, 页码 21-28出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2015.11.118
关键词
PZT; X-ray photoelectron spectroscopy; Surface phase; Diffraction; SEM
类别
资金
- CEA CTBU research grant
We present a study of the chemistry of the nanostructured phase at the surface of lead zirconium titanate PbZr0.52Ti0.48O3 (PZT) films synthesized by sol-gel method. In sol-gel synthesis, excess lead precursor is used to maintain the target stoichiometry. Surface nanostructures appear at 10% excess whereas 30% excess inhibits their formation. Using the surface-sensitive, quantitative X-ray photoelectron spectroscopy and glancing angle X-ray diffraction we have shown that the chemical composition of the nanostructures is ZrO1.82-1.89 rather than pyrochlore often described in the literature. The presence of a possibly discontinuous layer of wide band gap ZrO1.82-1.89 could be of importance in determining the electrical properties of PZT-based metal-insulator-metal heterostructures. (C) 2015 Elsevier B.V. All rights reserved.
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