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Title: Excess wing in glass-forming glycerol and LiCl-glycerol mixtures detected by neutron scattering

The relaxational dynamics in glass-forming glycerol and glycerol mixed with LiCl is investigated using different neutron scattering techniques. The performed neutron spin echo experiments, which extend up to relatively long relaxation time scales of the order of 10 ns, should allow for the detection of contributions from the so-called excess wing. This phenomenon, whose microscopic origin is controversially discussed, arises in a variety of glass formers and, until now, was almost exclusively investigated by dielectric spectroscopy and light scattering. In conclusion, we show here that the relaxational process causing the excess wing can also be detected by neutron scattering, which directly couples to density fluctuations.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [1] ;  [1] ;  [4] ;  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS) and Julich Centre for Neutron Science (JCNS)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS) and Julich Centre for Neutron Science (JCNS); Julich Centre for Neutron Science JCNS, Garching (Germany). Outstation at MLZ
  3. Univ. of Augsburg, Augsburg (Germany). Center for Electronic Correlations and Magnetism
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Publication Date:
OSTI Identifier:
1261408
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
European Physical Journal. E, Soft Matter
Additional Journal Information:
Journal Volume: 38; Journal Issue: 1; Journal ID: ISSN 1292-8941
Publisher:
EDP Sciences
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS