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  • Title: Relation between the activation energy of the Johari-Goldstein beta relaxation and T(g) of glass formers.
    Author: Ngai KL, Capaccioli S.
    Journal: Phys Rev E Stat Nonlin Soft Matter Phys; 2004 Mar; 69(3 Pt 1):031501. PubMed ID: 15089297.
    Abstract:
    For glass-forming substances, we show that the ratio E(beta)/RT(g) can be predicted quantitatively from the coupling model. Here E(beta) is the glassy state activation enthalpy of the Johari-Goldstein beta relaxation, T(g) is the glass transition temperature of the alpha relaxation, and R is the gas constant. The calculated value is in good agreement with the experimental value in many glass formers. The results locate the origin of this cross correlation between E(beta) of the Johari-Goldstein beta relaxation and T(g) of the alpha relaxation, although there are some notable exceptions to this cross correlation.
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