A study of alpha-relaxation of salol by simultaneous measurement of dielectric-loss and photon-correlation spectroscopy

Authors
Du, WM Hwang, YH
Citation
Wm. Du et Yh. Hwang, A study of alpha-relaxation of salol by simultaneous measurement of dielectric-loss and photon-correlation spectroscopy, J KOR PHYS, 34(1), 1999, pp. 46-50
Citations number
22
Categorie Soggetti
Physics
Journal title
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
ISSN journal
03744884 → ACNP
Volume
34
Issue
1
Year of publication
1999
Pages
46 - 50
Database
ISI
SICI code
0374-4884(199901)34:1<46:ASOAOS>2.0.ZU;2-G
Abstract
We studied the a relaxation in salol by simultaneous measurement of dielect ric-loss spectroscopy(DLS) and photon-correlation spectroscopy (PCS) at tem peratures (234.5 K similar to 242.5K) below the crossover temperature T-c. We identified the alpha-scale universality predicted in the mode-coupling t heory (MCT). We also found at T < T-c that the alpha-relaxation stretched e xponent beta(k) decreased as the temperature decreased. Contrary to the MCT prediction, the non-ergodicity parameter f(c) in PCS was temperature indep endent.