| Issue |
Europhys. Lett.
Volume 65, Number 3, February 2004
|
|
|---|---|---|
| Page(s) | 358 - 364 | |
| Section | Condensed matter: structure, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2003-10093-3 | |
| Published online | 01 January 2004 | |
Lifshitz-point instabilities and re-entrant
incommensurability in 
1
Institute of Geosciences, Crystallography, University of Kiel Olshausenstraße 40, 24098 Kiel, Germany
2
Group “Structure of Materials under Extreme Conditions” SNBL/ESRF 38043 Grenoble Cedex, France
Received:
31
March
2003
Accepted:
21
November
2003
The concentration-induced sequence of three incommensurate phases
(ϵ, 
, 
) previously disclosed
in x are interpreted as resulting from
distinct Lifshitz-invariant and Lifshitz-points instabilities.
When varying the temperature, the ϵ phase displays a
re-entrant behavior, which is described as a folding of the
high-temperature region triggered by the ordering of the lithium
ions.
PACS: 64.60.-i – General studies of phase transitions
© EDP Sciences, 2004
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