Ultra-slow Relaxation Dynamics in Triglycine Sulfate and D-Sorbitol Studied by Time-resolved Spectroscopy |
| |
Authors: | Tsujimi Y. Kobayashi M. Furuta H. Yagi T. |
| |
Affiliation: | (1) Research Institute for Electronic Science, Hokkaido University, Sapporo 060-0812, Japan;(2) Research Center for Materials Science at Extreme Condition, Osaka University, Osaka 560-831, Japan |
| |
Abstract: | The ultra-slow modes with a relaxation time much longer than 1 ns are discovered by a time-resolved spectroscopy in uniaxial ferroelectric (NH2CH2COOH)3H2SO4 (TGS) and in glass-former HOCH2(CHOH)4CH2OH (D-sorbitol). A mode discovered in TGS is a thermal relaxational mode and is proved to be the physical origin of the central peak found by Brillouin scattering. Two modes are discovered in D-sorbitol. One is a thermal relaxational mode. The other is a mode characterized by the Kohlraush-Williams-Watts function with a relaxation time R. A remarkable result is that R indicates a critical behavior not at the liquid-glass transition temperature Tg =–7°C but at the ergodic to nonergodic transition temperature Tc=33°C.This revised version was published online in November 2005 with corrections to the Cover Date. |
| |
Keywords: | D-sorbitol time-resolved spectroscopy triglycine sulfate |
本文献已被 SpringerLink 等数据库收录! |