| Issue |
Europhys. Lett.
Volume 54, Number 6, June II 2001
|
|
|---|---|---|
| Page(s) | 753 - 759 | |
| Section | Condensed matter: structure, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2001-00317-0 | |
| Published online | 01 December 2003 | |
Coherent 
-ray diffraction and phason fluctuations in quasicrystals
1
LTPCM, INPG, UMR CNRS 5614 - BP 75, 38402
St. Martin d'Heres Cedex, France
2
ESRF - BP 220, 38043 Grenoble Cedex, France
3
LAMEL-CNR - Via P. Gobetti 101, 40129 Bologna, Italy
4
Laboratoire d'étude des Microstructures, ONERA-CNRS -
BP 72, 92320 Chatillon France and LLB, CEA,
CNRS, CE Saclay - 91190 Gif-sur-Yvette, France
5
ILL - BP 156, 38042 Grenoble Cedex 9, France
6
CRMC2, CNRS, Campus de Luminy - case 913, 132888 Marseille
Cedex 9, France
Received:
17
April
2000
Accepted:
5
April
2001
Frozen-in phason fluctuations in single grains of icosahedral
-
-
quasicrystals have been studied
by high-resolution
coherent X-ray scattering. Bragg peak widths scale as expected
for a distribution of uniform phason strains. Strong relaxation
of the uniform phason strain is observed after sample annealing.
Large intensity fluctuations or speckle patterns are observed in
the Bragg peaks due to the uniform phason strain distribution in
the sample. Speckle patterns are also observed in the diffuse
scattering located close to the Bragg reflections and are related
to long-wavelength phason fluctuations taking place in the sample.
PACS: 61.44.Br – Quasicrystals / 61.10.Eq – X-ray scattering (including small-angle scattering)
© EDP Sciences, 2001
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