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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 University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory. 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 SCIENCE SA , 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
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-381104DOI: 10.1016/j.jallcom.2019.01.332ISI: 000461778600114OAI: oai:DiVA.org:uu-381104DiVA, id: diva2:1302400
Funder
EU, Horizon 2020, 686056EU, Horizon 2020, 691235Swedish Research CouncilKnut and Alice Wallenberg FoundationSwedish Foundation for Strategic Research StandUpeSSENCE - An eScience CollaborationSwedish Foundation for Strategic Research Available from: 2019-04-04 Created: 2019-04-04 Last updated: 2019-04-04Bibliographically approved

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Vekilova, Olga Yu.Eriksson, OlleHerper, Heike C.

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