Nanostructure and strain analysis of CeO2/YSZ strained superlattice

Takanori Kiguchi, Toyohiko J. Konno, Naoki Wakiya, Hitoshi Morioka, Keisuke Saito, Kazuo Shinozaki

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In this study, the nanostructure and the strain fields in the superlattice [CeO2/YSZ]5 fabricated on the SiO2/Si(0 0 1) substrate were investigated macroscopically and nanoscopically using X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) with geometric phase analysis (GPA) and related methods. The XRD analyses elucidated that the out-of-plane lattice parameter of CeO2 and YSZ layers is relaxed. However, the in-plane lattice parameter is almost identical. Results of HRTEM and related analyses revealed that CeO2 and YSZ layers form a superlattice structure. Results show that the superlattice has some defect structure, such as misorientation, varied thickness of CeO 2 and YSZ layers, varied artificial periodicity, and interface roughness. However, the out-of-plane lattice parameter has periodicity corresponding to the superlattice structure. The in-plane lattice parameter is also equal to the local deviation. Therefore, the strain effect in the superlattice persists to some degree.

Original languageEnglish
Pages (from-to)220-228
Number of pages9
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume173
Issue number1-3
DOIs
Publication statusPublished - 2010

Keywords

  • Ceria
  • Geometric phase analysis
  • Strain
  • Superlattice
  • Transmission electron microscopy
  • YSZ

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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