Chemistry of surface nanostructures in lead precursor-rich PbZr 0.52 Ti 0.48 O 3 sol-gel films

I Gueye; G Le Rhun; P Gergaud; O Renault; E Defay; N Barrett

Chemistry of surface nanostructures in lead precursor-rich PbZr 0.52 Ti 0.48 O 3 sol-gel films

I Gueye ¹ G Le Rhun ¹ P Gergaud ¹ O Renault ¹ E Defay ² N Barrett ^{3, *}

* Corresponding author

1 CEA-LETI - Laboratoire d'Electronique et des Technologies de l'Information

2 LIST - Luxembourg Institute of Science and Technology

3 SPEC - UMR3680 - Service de physique de l'état condensé

Abstract : We present a study of the chemistry of the nanostructured phase at the surface of lead zirconium titanate PbZr 0.52 Ti 0.48 O 3 (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 lead precursor whereas 30% excess precursor 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 ZrO 1.82−1.89 rather than pyrochlore often described in the literature. The presence of a possibly discontinuous layer of wide band gap ZrO 1.82−1.89 could be of importance in determining the electrical properties of PZT-based metal-insulator-metal heterostructures.

Keywords : SEM Surface phase Diffraction PZT X-ray photoelectron spectroscopy

Document type :

Journal articles

Domain :

Physics [physics] / Condensed Matter [cond-mat] / Materials Science [cond-mat.mtrl-sci]

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https://hal-cea.archives-ouvertes.fr/cea-01272812
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Submitted on : Thursday, February 11, 2016 - 1:51:54 PM
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Chemistry of surface nanostructures in lead precursor-rich PbZr 0.52 Ti 0.48 O 3 sol-gel films

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