TY - JOUR
T1 - Non-Arrhenius response of glass-forming liquids
AU - Chamberlin, Ralph
PY - 1993
Y1 - 1993
N2 - A Gaussian size distribution of independently relaxing domains is used to model the response of various glass-forming liquids. With a single temperature-dependent parameter, the model accurately characterizes the observed dielectric susceptibility of salol and glycerol [P. K. Dixon et al., Phys. Rev. Lett. 65, 1108 (1990); N. Menon et al., J. Non-Cryst. Solids 141, 61 (1992)] over more than 13 orders of magnitude in frequency. The quality and range of these data allow quantitative confirmation of all assumptions of the model. As a function of temperature, the model gives excellent agreement with observed asymptotic relaxation rates () via [ln(l/)-ln(1/w0)]s», where s» is a temperature-dependent average domain size, and w0 a constant intrinsic relaxation rate. Thus, the model provides a physical explanation for non-Arrhenius primary response, without resorting to the three adjustable parameters of the Vogel-Tammann-Fulcher law.
AB - A Gaussian size distribution of independently relaxing domains is used to model the response of various glass-forming liquids. With a single temperature-dependent parameter, the model accurately characterizes the observed dielectric susceptibility of salol and glycerol [P. K. Dixon et al., Phys. Rev. Lett. 65, 1108 (1990); N. Menon et al., J. Non-Cryst. Solids 141, 61 (1992)] over more than 13 orders of magnitude in frequency. The quality and range of these data allow quantitative confirmation of all assumptions of the model. As a function of temperature, the model gives excellent agreement with observed asymptotic relaxation rates () via [ln(l/)-ln(1/w0)]s», where s» is a temperature-dependent average domain size, and w0 a constant intrinsic relaxation rate. Thus, the model provides a physical explanation for non-Arrhenius primary response, without resorting to the three adjustable parameters of the Vogel-Tammann-Fulcher law.
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U2 - 10.1103/PhysRevB.48.15638
DO - 10.1103/PhysRevB.48.15638
M3 - Article
AN - SCOPUS:0001098050
SN - 0163-1829
VL - 48
SP - 15638
EP - 15645
JO - Physical Review B
JF - Physical Review B
IS - 21
ER -