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Mapping the magnetic transition temperatures for medium- and high-entropy alloys
Applied Materials Physics, Department of Materials Science and Engineering, Royal Institute of Technology, Stockholm, Sweden.
Sandvik Coromant R&D, Stockholm, Sweden.
Örebro University, School of Science and Technology. Department of Physics and Astronomy, Division of Materials Theory, Uppsala University, Uppsala, Sweden.
Applied Materials Physics, Department of Materials Science and Engineering, Royal Institute of Technology, Stockholm, Sweden; Department of Physics and Astronomy, Division of Materials Theory, Uppsala University, Uppsala, Sweden; Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Budapest, Hungary.
2018 (English)In: Intermetallics (Barking), ISSN 0966-9795, E-ISSN 1879-0216, Vol. 95, p. 80-84Article in journal (Refereed) Published
Abstract [en]

Tailorable magnetic state near room temperature is very promising for several technological, including magnetocaloric applications. Here using first-principle alloy theory, we determine the Curie temperature (T-C) of a number of equiatomic medium- and high-entropy alloys with solid solution phases. All calculations are performed at the computed lattice parameters, which are in line with the available experimental data. Theory predicts a large crystal structure dependence of T-C, which explains the experimental observations under specified conditions. The sensitivity of the magnetic state to the crystal lattice is reflected by the magnetic exchange interactions entering the Heisenberg Hamiltonian. The analysis of the effect of composition on T-C allows researchers to explore chemistry-dependent trends and design new multi-component alloys with pre-assigned magnetic properties.

Place, publisher, year, edition, pages
Elsevier , 2018. Vol. 95, p. 80-84
Keywords [en]
Curie temperature, High-entropy alloys, First-principle calculations, Monte-Carlo simulations
National Category
Metallurgy and Metallic Materials Physical Chemistry
Identifiers
URN: urn:nbn:se:oru:diva-66647DOI: 10.1016/j.intermet.2018.01.016ISI: 000428975100010Scopus ID: 2-s2.0-85041415212OAI: oai:DiVA.org:oru-66647DiVA, id: diva2:1198928
Funder
Swedish Research CouncilSwedish Foundation for Strategic Research VINNOVA, 2014-03374Swedish Energy AgencyCarl Tryggers foundation
Note

Funding Agencies:

Swedish Foundation for International Cooperation in Research and Higher Education

China Scholarship Council  

Hungarian Scientific Research Fund  OTKA 109570 

Available from: 2018-04-19 Created: 2018-04-19 Last updated: 2018-04-19Bibliographically approved

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Eriksson, Olle

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  • apa
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