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Pressure-induced magnetovolume effect in CoCrFeAl high-entropy alloy
Uppsala Univ, Dept Earth Sci, S-75236 Uppsala, Sweden..
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.ORCID iD: 0000-0003-2832-3293
Uppsala Univ, Dept Phys & Astron, Div Mol & Condensed Matter Phys, S-75120 Uppsala, Sweden..
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2019 (English)In: Communications Physics, E-ISSN 2399-3650, Vol. 2, article id 42Article in journal (Refereed) Published
Abstract [en]

High-entropy alloys (HEAs) composed of multiple-principal elements with (nearly) equimolar ratio establish a new conceptual framework for alloy design and hold a promise for extensive applications in industry, akin to the controlled expansion alloys (CEAs), such as Invar alloys. Spontaneously, one question emerges - would it be possible to synthesize a novel class of alloys combining the virtues of both CEAs and HEAs? Here, we report the pressure-induced magnetovolume effect in the body-centered-cubic CoCrFeAl HEA coupled with magnetic phase transitions from ferromagnetic to paramagnetic, and to non-magnetic states, originating from the successive collapses of local magnetic moments of Co and Fe. The observed magnetovolume anomalies, occurring in a progressive way, tailor appreciably the coefficient of thermal expansion of CoCrFeAl. These results further strengthen HEAs' anticipated potential for designing multifunctional materials in virtue of their multiple outstanding properties, and reveal possible routes for their future synthesis.

Place, publisher, year, edition, pages
NATURE PUBLISHING GROUP , 2019. Vol. 2, article id 42
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Materials Engineering
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URN: urn:nbn:se:kth:diva-252383DOI: 10.1038/s42005-019-0141-9ISI: 000467220700001Scopus ID: 2-s2.0-85071185777OAI: oai:DiVA.org:kth-252383DiVA, id: diva2:1337882
Note

QC 20190718

Available from: 2019-07-18 Created: 2019-07-18 Last updated: 2019-10-04Bibliographically approved

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Huang, ShuoVitos, Levente

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