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Mechanism of magnetic transition in FeCrCoNi-based high entropy alloys
Royal Inst Technol, Dept Mat Sci & Engn, Appl Mat Phys, SE-10044 Stockholm, Sweden..
Royal Inst Technol, Dept Mat Sci & Engn, Appl Mat Phys, SE-10044 Stockholm, Sweden..
Royal Inst Technol, Dept Mat Sci & Engn, Appl Mat Phys, SE-10044 Stockholm, Sweden..
Royal Inst Technol, Dept Mat Sci & Engn, Appl Mat Phys, SE-10044 Stockholm, Sweden..
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2016 (English)In: Materials & design, ISSN 0264-1275, E-ISSN 1873-4197, Vol. 103, 71-74 p.Article in journal (Refereed) Published
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Abstract [en]

First-principles alloy theory and Monte-Carlo simulations are performed to investigate the magnetic properties of FeCrCoNiAlx high entropy alloys. Results show that face-centered-cubic (fcc) and body-centered-cubic (bcc) structures possess significantly different magnetic behaviors uncovering that the alloy's Curie temperature is controlled by the stability of the Al-induced single phase or fcc-bcc dual-phase. We show that the appearance of the bcc phase with increasing Al content brings about the observed transition from the paramagnetic state for FeCrCoNi to the ferromagnetic state for FeCrCoNiAl at room-temperature. Similar mechanism is predicted to give rise to room-temperature ferromagnetism in FeCrCoNiGa high entropy alloy.

Place, publisher, year, edition, pages
2016. Vol. 103, 71-74 p.
Keyword [en]
High-entropy alloy, Magnetic transition, Monte-Carlo simulation, First-principles calculation
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-298828DOI: 10.1016/j.matdes.2016.04.053ISI: 000376892300008OAI: oai:DiVA.org:uu-298828DiVA: diva2:948394
Funder
Swedish Research CouncilSwedish Foundation for Strategic Research VINNOVA, 2014-03374
Available from: 2016-07-11 Created: 2016-07-11 Last updated: 2016-07-11Bibliographically approved

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