TY  - JOUR
AU  - Shen, Jie
AU  - Cornet, Antoine
AU  - Ronca, Alberto
AU  - Pineda, Eloi
AU  - Yang, Fan
AU  - Garden, Jean-Luc
AU  - Moiroux, Gael
AU  - Vaughan, Gavin
AU  - Michiel, Marco di
AU  - Garbarino, Gaston
AU  - Westermeier, Fabian
AU  - Goujon, Celine
AU  - Legendre, Murielle
AU  - Liu, Jiliang
AU  - Cangialosi, Daniele
AU  - Ruta, Beatrice
TI  - Linking the pressure dependence of the structure and thermal stability to α-and β-relaxations in metallic glasses
JO  - Science advances
VL  - 11
IS  - 40
SN  - 2375-2548
CY  - Washington, DC [u.a.]
PB  - Assoc.
M1  - PUBDB-2025-04301
SP  - 40
PY  - 2025
AB  - Glasses derive their functional properties from complex relaxation dynamics that remain enigmatic under extreme conditions. Although the temperature dependence of these relaxation processes is well established, their behavior under high-pressure conditions remains poorly understood due to substantial experimental difficulties. In this study, we use cutting-edge experimental techniques to probe the pressure evolution of the relaxation spectrum in a Zr<sub>46.8</sub>Ti<sub>8.2</sub>Cu<sub>7.5</sub>Ni<sub>10</sub>Be<sub>27.5</sub> metallic glass across gigapascal pressure ranges. Our findings reveal two distinct relaxation mechanisms under high pressure: In the β-relaxation regime, compression drives the system with reduced atomic mobility and enhanced structural disorder, without appreciable density changes. Conversely, α-relaxation under pressure promotes density-driven structural ordering that improves thermal stability. Notably, the transition between these regimes occurs at a constant T/T<sub>g</sub>,P ratio, independent of applied pressure. These results provide crucial insights for decoupling the competing structural and relaxation contributions to glass stability, establishing a systematic framework for tailoring glass properties through controlled thermomechanical processing. 
LB  - PUB:(DE-HGF)16
C6  - pmid:41042883
DO  - DOI:10.1126/sciadv.adz7406
UR  - https://bib-pubdb1.desy.de/record/639098
ER  -