Decoupling between calorimetric and dynamical glass transitions in high-entropy metallic glasses

Abstract Glass transition is one of the unresolved critical issues in solid-state physics and materials science, during which a viscous liquid frozen into solid or structurally arrested state. On account uniform mechanism, calorimetric glass temperature ( T g ) always follows same trend as dynamical (or α -relaxation) determined by dynamic mechanical analysis (DMA). Here, we explored correlations between transitions three prototypical high-entropy metallic glasses (HEMGs) systems. We found that HEMGs present depressed phenomenon, i.e ., with moderate represent highest maximum activation energy -relaxation. These decoupled from thermal measurements reveal effect high configurational entropy on structure dynamics supercooled liquids glasses, are associated sluggish diffusion decreased spatial heterogeneities mixing entropy. The results have important implications understanding properties for designing new plenteous physical performances.