| Issue |
Eur. Phys. J. AP
Volume 9, Number 1, January 2000
|
|
|---|---|---|
| Page(s) | 1 - 9 | |
| DOI | https://doi.org/10.1051/epjap:2000192 | |
| Published online | 15 January 2000 | |
https://doi.org/10.1051/epjap:2000192
A neutron diffraction study of BaCexZr1−xO3
1
Laboratoire d'Electrochimie et de Physicochimie des Matériaux et Interfaces (UMR INPG-CNRS),
ENSEEG B.P. 75,
38402 Saint Martin d'Hères, France
2
Institut Laue Langevin, Chemin des Martyrs, 38000 Grenoble, France
Corresponding author: Thierry.Pagnier@lepmi.inpg.fr
Received:
6
May
1999
Revised:
17
September
1999
Accepted:
20
October
1999
Published online: 15 January 2000
High resolution neutron diffraction patterns of BaCexZr1−xO3 (x = 0, 0.1, 0.4,
0.8) were obtained at various temperatures. The phase diagram that was deduced from Raman
measurements has been confirmed. Structural transitions occur in a fixed order
Pnma-Imma- R
c-Pm3m as a function of temperature or composition. For BaCeO3, the
large volume change that has been previously claimed at the Imma-Rc transition has
been revisited and found inconsistent. For a given composition, the cell volume increases
when temperature increases, but the MO6 (M=Ce-Zr) octahedron volume decreases. It is
shown that the ratio of the cell volume to the octahedron volume is a good indicator of the
phase transitions. Transitions occur at fixed values (5.77, 5.80 and 6 for the Pnma-Imma,
Imma-Rc and Rc-Pm3m transitions respectively) independently of
composition.
PACS: 61.12.Ld – Single-crystal and powder diffraction / 64.70.Kb – Solid-solid transitions
© EDP Sciences, 2000
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.