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Issue 11, 2026
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Using entropy concepts to analyze structural ordering, relaxation propensity, and glass-forming ability of metallic glasses and their melts

†  a, ‡  b, §  b
a Osipyan Institute of Solid State Physics, Russian Academy of Sciences, Akademika Osip'yana str. 2, Chernogolovka, Moscow Region, 142432, Russian Federation
b Voronezh State Pedagogical University, Lenina st. 86, Voronezh, 394043, Russian Federation

We present an overview of a novel entropy-based framework for analyzing structural ordering, relaxation propensity, and glass-forming ability (GFA) of metallic glasses (MGs) and their melts. The key idea of this approach consists in determining the excess entropy ΔS of the glass relative to the crystal. The quantity ΔS is highly sensitive to structural changes in MGs upon heat treatment within the non-crystalline state. ΔS is found to be inversely correlated with the mixing entropy ΔSmix. A dimensionless structural order parameter is introduced, which is effective for describing the structural evolution of MGs and correlates with the GFA of the melt. The relationship between ΔS and fragility is discussed; the excess entropy per atom and the entropy of structural 'defects' in MGs are analyzed. The applicability of the approach to non-metallic glasses is briefly considered.

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Correspondence should be addressed to
Keywords: metallic glasses, excess entropy, order parameter, fragility, glass forming ability, defects
PACS: 61.43.−j, 65.40.gd, 81.05.Kf (all)
DOI: 10.3367/UFNe.2026.10.040210
URL: https://ufn.ru/en/articles/2026/11/b/
Citation: Kobelev N P, Makarov A S, Khonik V A "Using entropy concepts to analyze structural ordering, relaxation propensity, and glass-forming ability of metallic glasses and their melts" Phys. Usp. 69 (11) (2026)

Received: 19th, May 2026, revised: 30th, September 2026, 2nd, October 2026

Оригинал: Кобелев Н П, Макаров А С, Хоник В А «Использование энтропийных представлений для анализа структурной упорядоченности, склонности к релаксации, стеклообразующей способности металлических стёкол и их расплавов» УФН 196 1140–1152 (2026); DOI: 10.3367/UFNr.2026.10.040210

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