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Mechanism of magnetic transition in FeCrCoNi-based high entropy alloys
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Material Physics.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Material Physics.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Material Physics.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Material Physics. (ENHETEN EGENSKAPER)ORCID iD: 0000-0001-9317-6205
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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
Elsevier, 2016. Vol. 103, 71-74 p.
Keyword [en]
First-principles calculation, High-entropy alloy, Magnetic transition, Monte-Carlo simulation, Aluminum, Calculations, Crystal structure, Entropy, Ferromagnetism, Intelligent systems, Magnetism, Stainless steel, Body-centered cubic (bcc) structure, Face-centered cubic, Ferromagnetic state, High entropy alloys, Magnetic transitions, Paramagnetic state, Room temperature ferromagnetism, Monte Carlo methods
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-186897DOI: 10.1016/j.matdes.2016.04.053ISI: 000376892300008Scopus ID: 2-s2.0-84964558121OAI: oai:DiVA.org:kth-186897DiVA: diva2:929391
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QC 20160518

Available from: 2016-05-18 Created: 2016-05-16 Last updated: 2016-11-29Bibliographically approved

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Schönecker, StephanBergqvist, LarsVitos, Levente

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