Issue |
Europhys. Lett.
Volume 36, Number 1, October 1996
|
|
---|---|---|
Page(s) | 55 - 60 | |
Section | Condensed matter: structure, thermal and mechanical properties | |
DOI | https://doi.org/10.1209/epl/i1996-00186-5 | |
Published online | 01 September 2002 |
Dynamic heterogeneity in supercooled ortho-terphenyl studied by multidimensional deuteron NMR
1
Institut für Physikalische Chemie, Johannes Gutenberg-Universität,
55099 Mainz, Germany
2
Fachbereich Physik der Universität Dortmund - 44221 Dortmund, Germany
Received:
9
May
1996
Accepted:
19
August
1996
Using deuteron NMR, we have studied molecular reorientation rates and rate exchange processes in supercooled ortho-terphenyl. We monitor the re-equilibration of differently selected subensembles through four-time stimulated echo experiments. A comparison of the two-time with the four-time echoes suggests that the characteristic time scales for reorientation and dynamical exchange are relatively similar. The four-time correlation functions were described using various multi-state rate exchange models.
PACS: 64.70.Pf – Glass transitions / 76.60.Lz – Spin echoes / 05.40.+j – Fluctuation phenomena, random processes, and Brownian motion
© EDP Sciences, 1996
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