The Johari–Goldstein or beta relaxation has a clear spectroscopic signature in fragile glass-formers, including many organic and metallic systems, while is less or not at all visible in strong glass-formers, including most network-forming systems as oxides and chalcogenides. This is often related to the reduced structural heterogeneity characteristic of strong glasses. We here study the chalcogenide glass As2Se3 using a fast-scanning calorimeter. We show that, while slowly cooled samples show indeed no clear evidence of beta relaxation, a sample fast-quenched from the melt shows instead a clear evidence of it. We have performed enthalpy relaxation experiments to evaluate the activation energy of such relaxation, and the obtained results conform to the accepted value for the activation energy of the relaxation. Fast-quenching can then be a tool to study the relaxation also in chalcogenide glasses.
