| Title: | Optical responses from high entropy alloys : experimental results and perspectives |
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| Authors: | ID Nominé, Alexandre, Institut "Jožef Stefan" (Author)
ID Solomonov, Alexander I. (Author)
ID Polanšek, Juš, Institut "Jožef Stefan" (Author)
ID Zavašnik, Janez, Institut "Jožef Stefan" (Author)
ID Cvelbar, Uroš, Institut "Jožef Stefan" (Author)
ID Milichko, Valentin A. (Author), et al. |
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| Files: |  URL - Source URL, visit https://pubs.rsc.org/en/content/articlelanding/2025/fd/d5fd00086f
 PDF - Presentation file, download (2,76 MB)
MD5: 108DCA3F6818CCB6F07D9F19EBBD9E3F
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  IJS - Jožef Stefan Institute
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| Abstract: | High-entropy alloys (HEAs) combine five or more elements in near-equiatomic ratios, opening an immense compositional space whose optical behaviour is still largely unknown. Phase-modulated ellipsometry on bulk CrMnFeCoNi (Cantor) shows that its intrinsic optical constants n, k, ε1, ε2 deviate strongly from the arithmetic mean of the constituent elements—by up to a factor of two beyond 1 µm—yet the derived functional responses, reflectance R and absorption coefficient α, are reproduced to within ~20 %. Cantor nanoparticles have been produced by nanosecond electric discharges in liquid nitrogen. Dark-field spectroscopy and Mie calculations reveal a dominant scattering mode near 100 nm that red-shifts and broadens with increasing size; the steady-state photothermal rise calculated from absorption cross-section σabs falls between those of the constituent pure metals.Generalising the averaging rule, we compute proxy values of R and α for 10 994 density-functional-theory-predicted HEAs. Successive optical, thermal and resource filters condense the space to 58 candidates at 355 nm and eight refractory alloys at 1064 nm, illustrating a “sustainable-by-design” route for future HEA photonics. |
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| Keywords: | high entropy alloys, optical properties |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 19.05.2025 |
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| Article acceptance date: | 21.08.2025 |
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| Publication date: | 01.09.2025 |
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| Publisher: | The Royal Society of Chemistry |
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| Year of publishing: | 2026 |
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| Number of pages: | str. 474-493 |
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| Numbering: | Vol. 264 |
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| Source: | Združeno kraljestvo |
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| PID: | 20.500.12556/DiRROS-32403  |
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| UDC: | 620.1/.2 |
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| ISSN on article: | 1364-5498 |
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| DOI: | 10.1039/D5FD00086F |
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| COBISS.SI-ID: | 248791811 |
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| Copyright: | © 2026 The Author(s). |
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| Note: | Nasl. z nasl. zaslona;
Soavtorji iz Slovenije: Juš Polanšek, Janez Zavašnik, Uroš Cvelbar;
Opis vira z dne 12. 9. 2025;
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| Pub. date in DiRROS: | 10.09.2026 |
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| Views: | 31 |
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| Downloads: | 22 |
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