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Influence of antiphase boundary of the MnAl tau-phase on the energy product
VSB Tech Univ Ostrava, IT4Innovat, 17 Listopadu 15, CZ-70833 Ostrava, Czech Republic;Univ Burgos, Int Res Ctr Crit Raw Mat & Adv Ind Technol, ICCRAM, Burgos 09001, Spain.
Univ Burgos, Int Res Ctr Crit Raw Mat & Adv Ind Technol, ICCRAM, Burgos 09001, Spain.
Univ Burgos, Int Res Ctr Crit Raw Mat & Adv Ind Technol, ICCRAM, Burgos 09001, Spain;Int Ctr Adv Mat & Raw Mat Castilla & Leon, ICAMCyL, Leon 24492, Spain.
Danube Univ Krems, Dept Integrated Sensor Syst, A-2700 Wiener Neustadt, Austria.
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2019 (English)In: PHYSICAL REVIEW MATERIALS, ISSN 2475-9953, Vol. 3, no 6, article id 064412Article in journal (Refereed) Published
Abstract [en]

In this paper, we use a multiscale approach to describe a realistic model of a permanent magnet based on MnAl tau-phase and elucidate how the antiphase boundary defects present in this material affect the energy product. We show how the extrinsic properties of a microstructure depend on the intrinsic properties of a structure with defects by performing micromagnetic simulations. For an accurate estimation of the energy product of a realistic permanent magnet based on the MnAl tau-phase with antiphase boundaries, we quantify exchange interaction strength across the antiphase boundary defect with a simple approach derived from first-principles calculations. These two types of calculations, performed at different scales, are linked via atomistic spin-dynamics simulations.

Place, publisher, year, edition, pages
American Physical Society, 2019. Vol. 3, no 6, article id 064412
National Category
Metallurgy and Metallic Materials Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-390677DOI: 10.1103/PhysRevMaterials.3.064412ISI: 000473314400003OAI: oai:DiVA.org:uu-390677DiVA, id: diva2:1343069
Funder
EU, Horizon 2020, 686056Swedish Research CouncilSwedish Foundation for Strategic Research , EM6-0039Swedish Energy AgencyAvailable from: 2019-08-15 Created: 2019-08-15 Last updated: 2019-08-15Bibliographically approved

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Delczeg-Czirjak, Erna KrisztinaHerper, Heike C.Eriksson, Olle

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