Abstract
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 language | English |
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Pages (from-to) | 605-608 |
Number of pages | 4 |
Journal | Journal of Electroceramics |
Volume | 13 |
Issue number | 1-3 |
DOIs | |
Publication status | Published - Jul 2004 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Mechanics of Materials
- Ceramics and Composites
- Materials Chemistry
- Electrical and Electronic Engineering