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The dielectric permittivity and loss spectra of the glassy state of 5-methyl-2-hexanol obtained by quenching it from the liquid state has been studied. In one experiment, the spectra were studied at different temperatures as the quenched sample was heated at 0.1 K/min from 105.3 to 160.5 K. In the second experiment, the quenched sample was heated from 77 to 131.6 K and kept at that temperature for 14.6 ks. The relaxation rate, fm,β, the dielectric relaxation strength, Δeβ, and the distribution of relaxation time parameters, α and β, for the Johari–Goldstein process were determined. The parameter β was found to be equal to 1 and independent of both the temperature and time, Δeβ initially decreased on increasing the temperature, reached a minimum value at ∼145.6 K, and then increased. The plot of fm,β against the reciprocal temperature decreased in slope and at ∼140 K became linear. This indicates that fm,β increases on structural relaxation. In the course of the annealing at 131.6 K, Δeβ of the quenched sa...

Localized relaxation in a glass and the minimum in its orientational polarization contribution