NONLINEAR AND NONEXPONENTIAL VOLUME RELAXATION AT THE ORIENTATIONAL GLASS-TRANSITION IN SOLID C-60

Authors
MEINGAST C HALUSKA M KUZMANY H
Citation
C. Meingast et al., NONLINEAR AND NONEXPONENTIAL VOLUME RELAXATION AT THE ORIENTATIONAL GLASS-TRANSITION IN SOLID C-60, Journal of non-crystalline solids, 201(1-2), 1996, pp. 167-171
Citations number
23
Categorie Soggetti
Material Science, Ceramics
Journal title
Journal of non-crystalline solids → ACNP
ISSN journal
00223093
Volume
201
Issue
1-2
Year of publication
1996
Pages
167 - 171
Database
ISI
SICI code
0022-3093(1996)201:1-2<167:NANVRA>2.0.ZU;2-Y
Abstract
The orientational 'glass' transition in solid C-60 has been investigat ed in detail by high-resolution capacitance dilatometry. Thermal expan sivity data taken for a variety of heating (cooling) rates are fit usi ng the widely applied phenomenological Tool-Narayanaswamy (TN) model f or structural relaxation. This analysis shows that the relaxation is b oth slightly non-exponential (beta = 0.90 +/- 0.02) and non-linear (x = 1.08 +/- 0.02). This 'simple' system, thus, exhibits a qualitatively similar degree of complexity as conventional glass formers.