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Intrinsic magnetic properties of SmFe12-xVx alloys with reduced V-concentration
Univ Basque Country, BCMat, Sci Pk, E-48940 Leioa, Spain.;Univ Basque Country, UPV EHU, Dept Elect & Elect, Leioa 48940, Spain..
Univ Basque Country, BCMat, Sci Pk, E-48940 Leioa, Spain..
Uppsala Univ, Dept Phys & Astron, Box 516, S-75121 Uppsala, Sweden..
Uppsala Univ, Dept Phys & Astron, Box 516, S-75121 Uppsala, Sweden.;Orebro Univ, Sch Sci & Technol, SE-70182 Orebro, Sweden..
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2019 (English)In: Journal of Alloys and Compounds, ISSN 0925-8388, E-ISSN 1873-4669, Vol. 786, p. 969-974Article in journal (Refereed) Published
Abstract [en]

In this work, we present experimental and theoretical results on SmFe12-xVx (x = 0.5 - 2.0) alloys with the ThMn12 (1:12) structure as possible candidates for rare earth-lean permanent magnets. The compound with x = 2 has been previously reported to have a Curie temperature of 330 degrees C, saturation magnetization of about 80 Am-2/kg, and anisotropy field around 9 T. We have synthesized the SmFe11V compound with a nearly pure 1:12 phase; the x = 0.5 compound couldn't be synthesized. The relative stability of the x = 1, 2 compounds was addressed theoretically by enthalpy calculations from first principles. The newly synthesized SmFe11V compound has a Curie temperature of 361 degrees C and saturation magnetization of 115 Am-2/kg (1.12 T). The anisotropy field has been obtained in magnetically-oriented fine powders, and is around 11 T. These parameters make SmFe11V a good candidate for a new kind of high energy, rare earth-lean permanent magnets.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 786, p. 969-974
Keywords [en]
Rare-earth lean permanent magnets, ThMn12-type structure, Iron alloys, Magnetocrystalline anisotropy, Ab initio calculations, Density functional theory
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:oru:diva-73487DOI: 10.1016/j.jallcom.2019.01.332ISI: 000461778600114Scopus ID: 2-s2.0-85061344620OAI: oai:DiVA.org:oru-73487DiVA, id: diva2:1302339
Funder
EU, Horizon 2020, 686056 691235StandUpeSSENCE - An eScience CollaborationSwedish Research CouncilKnut and Alice Wallenberg FoundationSwedish Foundation for Strategic Research
Note

Funding Agency:

U.S. Department of Energy  DOE DE-FG02-90ER45413

Available from: 2019-04-04 Created: 2019-04-04 Last updated: 2019-04-04Bibliographically approved

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