MnxCr0.3Fe0.5Co0.2Ni0.5Al0.3 high entropy alloys for magnetocaloric refrigeration near room temperatureShow others and affiliations
2021 (English)In: Journal of Materials Science & Technology, ISSN 1005-0302, Vol. 79, p. 15-20Article in journal (Refereed) Published
Abstract [en]
High entropy alloys (HEAs) based on transition metals display rich magnetic characteristics, however attempts on their application in energy efficient technologies remain scarce. Here, we explore the magnetocaloric application for a series of MnxCr0.3Fe0.5Co0.2Ni0.5Al0.3 (0.8 < x < 1.1) HEAs by integrated theoretical and experimental methods. Both theory and experiment indicate the designed HEAs have the Curie temperature close to room temperature and is tunable with Mn concentration. A non-monotonic evolution is observed for both the entropy change and the relative cooling power with changing Mn concentration. The underlying atomic mechanism is found to primarily emerge from the complex impact of Mn on magnetism. Advanced magnetocaloric properties can be achieved by tuning Mn concentration in combination with controlling structural phase stability for the designed HEAs.
Place, publisher, year, edition, pages
Elsevier, 2021. Vol. 79, p. 15-20
Keywords [en]
High entropy alloys, Magnetocaloric materials, Magnetic phase transition, Experiment and Ab initio
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:oru:diva-92064DOI: 10.1016/j.jmst.2020.10.071ISI: 000654379000002Scopus ID: 2-s2.0-85098116535OAI: oai:DiVA.org:oru-92064DiVA, id: diva2:1559453
Funder
Swedish Research Council, 2015-5335 2017-06474Swedish Foundation for Strategic Research , S14-0038 SM16-0036Swedish Energy AgencyCarl Tryggers foundation eSSENCE - An eScience Collaboration
Note
Funding Agencies:
Swedish Foundation for International Cooperation in Research and Higher Education CH2015-6292
Orszagos Tudomanyos Kutatasi Alapprogramok (OTKA)OTKA 128229
ST
UPP
2021-06-022021-06-022021-06-02Bibliographically approved