Mechanism of magnetic transition in FeCrCoNi-based high entropy alloys
2016 (English)In: Materials & design, ISSN 0264-1275, E-ISSN 1873-4197, Vol. 103, 71-74 p.Article in journal (Refereed) PublishedText
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.
High-entropy alloy, Magnetic transition, Monte-Carlo simulation, First-principles calculation
IdentifiersURN: urn:nbn:se:uu:diva-298828DOI: 10.1016/j.matdes.2016.04.053ISI: 000376892300008OAI: oai:DiVA.org:uu-298828DiVA: diva2:948394
FunderSwedish Research CouncilSwedish Foundation for Strategic Research VINNOVA, 2014-03374