%0 Journal Article
%T Evidence for a disorder driven phase transition in the condensation of 4He in aerogels
%+ Hélium : du fondamental aux applications (NEEL - HELFA)
%+ Groupe d'étude des semiconducteurs (GES)
%A Bonnet, Fabien
%A Lambert, Thierry
%A Cross, Benjamin
%A Guyon, Laurent
%A Despetis, Florence
%A Puech, Laurent
%A Wolf, Pierre-Etienne
%Z ANR-06-BLAN-0098
%Z 11 pages
%< avec comité de lecture
%@ 0295-5075
%J EPL - Europhysics Letters
%I European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing
%V 82
%N 5
%P 56003
%8 2008-06
%D 2008
%Z 0802.2985
%R 10.1209/0295-5075/82/56003
%K désordre
%K isothermes d'adsorption
%K transition liquide-gaz
%K aerogel
%K helium
%Z pacs 64.60.-i,64.70.F-,67.25.bh
%Z Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft]
%Z Physics [physics]/Condensed Matter [cond-mat]/Statistical Mechanics [cond-mat.stat-mech]Journal articles
%X We report on thermodynamic and optical measurements of the condensation process of $^4$He 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.
%G English
%Z ANR-06-BLAN-0098
%2 https://hal.science/hal-00257998/document
%2 https://hal.science/hal-00257998/file/Bonnet.pdf
%L hal-00257998
%U https://hal.science/hal-00257998
%~ UGA
%~ CNRS
%~ UNIV-GRENOBLE1
%~ UNIV-MONTP2
%~ INPG
%~ OSUG
%~ NEEL
%~ LEGI
%~ GES
%~ NEEL-HELFA
%~ UNIV-MONTPELLIER
%~ ANR
%~ UM1-UM2