Year: 1996
Type: article
Abstract: Brillouin scattering of hypersonic sound waves by fragile glass-forming propylene glycol has been studied using a (3+3)-pass vernier tandem Fabry-Pérot interferometer at temperatures between 364 K and 140 K. The velocity dispersion has been analyzed using the Cole-Davidson model (βCD=0.45). The relaxation time was found to obey the Arrhenius law, and we have obtained ΔE=0.28 eV and τ0=1.26×10-15s. The relaxation strength (or the Debye-Waller factor in the mode coupling theory (MCT)) was found to obey the (Tc-T)1/2law belowTc=314 K, as predicted by the MCT. However the crossover temperatureTcwas much higher than our previous result ofTc=227±5 K which was obtained from the broadband susceptibility spectra.
DOI: 10.1143/jjap.35.2925
Authors: Akira Yoshihara, Hiromitsu Sato Kojima
Institution: Tohoku University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W1985377134