Detecting the exponential relaxation spectrum in glasses by high-precision nanocalorimetry.

ABSTRACT: Nonexponential relaxations are universal characteristics for glassy materials. There is a well-known hypothesis that nonexponential relaxation peaks are composed of a series of exponential events, which have not been verified. In this Letter, we discover the exponential relaxation events during the recovery process using a high-precision nanocalorimetry, which are universal for metallic glasses and organic glasses. The relaxation peaks can be well fitted by the exponential Debye function with a single activation energy. The activation energy covers a broad range from α relaxation to β relaxation and even the fast γ/β' relaxation. We obtain the complete spectrum of the exponential relaxation peaks over a wide temperature range from 0.63T_g to 1.03T</

SUBMITTER: Song L 

PROVIDER: S-EPMC10193961 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature