| Issue |
EPL
Volume 82, Number 5, June 2008
|
|
|---|---|---|
| Article Number | 56003 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
| DOI | https://doi.org/10.1209/0295-5075/82/56003 | |
| Published online | 23 May 2008 | |
Evidence for a disorder-driven phase transition in the condensation of 
in
aerogels
1
Institut Néel, CNRS-UJF - BP 166, 38042 Grenoble-Cedex 9, France, EU
2
Groupe d'Etude des Semiconducteurs, CNRS-UMR 5650, Université Montpellier II - Case Courrier 074, 34095 Montpellier-Cedex 5, France, EU
Corresponding author: pierre-etienne.wolf@grenoble.cnrs.fr
Received:
19
February
2008
Accepted:
14
May
2008
We report on thermodynamic and optical measurements of the condensation process of 4He in three silica aerogels of different microstructures. For the two base-catalysed aerogels, the temperature dependence of the shape of adsorption isotherms and of the morphology of the condensation process show evidence of a disorder-driven transition, in agreement with recent theoretical predictions. This transition is not observed for a neutral-catalysed aerogel, which we interpret as due to a larger disorder in this case.
PACS: 64.60.-i – General studies of phase transitions / 64.70.F- – Liquid-vapour transitions / 67.25.bh – Quantum fluids and solids: 4He: Films and restricted geometries
© EPLA, 2008
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.