[en] Using Brillouin spectroscopy as a probe for high-frequency clamped acoustic properties, a shear modulus can be measured in addition to the longitudinal modulus already well above the thermal glass transition. On slow cooling of the liquid through the thermal glass transition temperature Tg, both moduli show a kink-like behaviour and the function follows a generalized Cauchy relation (gCR) defined by the linear relation , which completely hides the glass transition. In this work we show experimentally that on fast cooling this linear transformation becomes violated within the glassy state, but that thermal ageing drives the elastic coefficients towards the gCR, i.e. towards a unique glassy state.
Disciplines :
Physique Science des matériaux & ingénierie
Identifiants :
UNILU:UL-ARTICLE-2009-026
Auteur, co-auteur :
KRÜGER, Jan-Kristian ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Britz, Th; Universität des Saarlandes, Fakultät für Physik und Elektrotechnik 7.2, Gebäude 38, D-66041 Saarbrücken, Germany
le Coutre, A.
BALLER, Jörg ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Possart, W.; Universität des Saarlandes, Fakultät für Chemie, Pharmazie und Werkstoffwissenschaften 8.15, Gebäude 22, D-66041 Saarbrücken, Germany
Alnot, Patrick; Laboratoire de Physique des Milieux Ionisés et Applications (LPMIA), UMR 7040-CNRS, Université de Nancy I, Boulevard des Aiguillettes, BP 239 F-54506 Vandoeuvre les Nancy, France
SANCTUARY, Roland ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Langue du document :
Anglais
Titre :
Different glassy states, as indicated by a violation of the generalized Cauchy relation.
