%0 Journal Article
%A Shen, Jie
%A Cornet, Antoine
%A Ronca, Alberto
%A Pineda, Eloi
%A Yang, Fan
%A Garden, Jean-Luc
%A Moiroux, Gael
%A Vaughan, Gavin
%A Michiel, Marco di
%A Garbarino, Gaston
%A Westermeier, Fabian
%A Goujon, Celine
%A Legendre, Murielle
%A Liu, Jiliang
%A Cangialosi, Daniele
%A Ruta, Beatrice
%T Linking the pressure dependence of the structure and thermal stability to α-and β-relaxations in metallic glasses
%J Science advances
%V 11
%N 40
%@ 2375-2548
%C Washington, DC [u.a.]
%I Assoc.
%M PUBDB-2025-04301
%P 40
%D 2025
%X 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. 
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:41042883
%R 10.1126/sciadv.adz7406
%U https://bib-pubdb1.desy.de/record/639098