Room temperature phase transition in CeO2 nanocrystalline films

Anna Kossoy, Jaya P. Nair, Ellen Wachtel, Igor Lubomirsky, Juergen Fleig, Joachim Maier

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


The temporal evolution of the lattice parameter of oxygen deficient nanocrystalline cerium oxide films was monitored by X-ray diffraction. It was found that films with lattice parameter of ≈ 5.47 {Å} upon deposition undergo large spontaneous expansion, in which the size of the unit cell increases by ≈ 0.7% during the course of days. The films with as-deposited lattice parameter larger or smaller than ≈ 5.47 Å do not show significant changes. This behavior is consistent with the previously suggested hypothesis of an order-disorder transition of oxygen vacancies and can be viewed as its direct experimental confirmation.

Original languageEnglish
Pages (from-to)605-608
Number of pages4
JournalJournal of Electroceramics
Issue number1-3
StatePublished - Jul 2004
Externally publishedYes

Bibliographical note

Funding Information:
The authors wish to acknowledge the Israel Ministry of Science, the Israeli Science Foundation and The German Federal Ministry of the Environment/Nature conservation and nuclear safety (BMU) for funding this research. I.L. is the incumbent of the Helen and Milton Kimmelman Career Development Chair.


  • Cerium oxide
  • Diffusion
  • Mechanical stress
  • Nanocrystalline ceramics


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