| Issue |
Europhys. Lett.
Volume 46, Number 5, June I 1999
|
|
|---|---|---|
| Page(s) | 643 - 648 | |
| Section | Condensed matter: structure, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i1999-00314-9 | |
| Published online | 01 September 2002 | |
An experimental separation of anharmonic and disorder effects on glassy dynamics
1
Institut Laue Langevin, BP 156x - F-38042 Grenoble
Cedex 9, France
2
Consejo Superior de Investigaciones
Científicas - Serrano 123, E-28006 Madrid, Spain
Received:
17
August
1998
Accepted:
19
March
1999
Through the study of a polymorphic material, the effects of orientational and structural disorder on the dynamics of glasses are compared to those of anharmonic interactions. The influence of orientational and structural disorder on the Grüneisen parameters has been separated combining the pressure dependence of the density of states with the molar volume of each phase. The results show that the two phases exhibiting glassy behavior have different anharmonic properties, and that this anharmonicity difference is responsible for most of the observed differences in their low-temperature specific heats.
PACS: 62.20.-x – Mechanical properties of solids / 63.50.+x – Vibrational states in disordered systems / 65.70.+y – Thermal expansion and density changes; thermomechanical effects
© EDP Sciences, 1999
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.