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Influence of antiphase boundary of the MnAl tau-phase on the energy product
IT4Innovations, VSB-Technical University of Ostrava, Ostrava-Poruba, Czech Republic; ICCRAM, International Research Center in Critical Raw Materials and Advanced Industrial Technologies, University of Burgos, Burgos, Spain.
ICCRAM, International Research Center in Critical Raw Materials and Advanced Industrial Technologies, University of Burgos, Burgos, Spain.
ICCRAM, International Research Center in Critical Raw Materials and Advanced Industrial Technologies, University of Burgos, Burgos, Spain; ICAMCyL, International Center for Advanced Materials and Raw Materials of Castilla y Léon, Léon, Spain.
Department for Integrated Sensor Systems, Danube University Krems, 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
Materials Engineering
Identifiers
URN: urn:nbn:se:oru:diva-75225DOI: 10.1103/PhysRevMaterials.3.064412ISI: 000473314400003Scopus ID: 2-s2.0-85068915736OAI: oai:DiVA.org:oru-75225DiVA, id: diva2:1339095
Funder
Swedish Research CouncilSwedish Foundation for Strategic Research , EM6-0039Swedish Energy AgencyStandUp
Note

Funding Agencies:

EU H2020 project Novamag  686056 

Austrian Science Fund FWF  I3288-N36 

European Regional Development Fund in the IT4Innovations national supercomputing centerPath to Exascale Project within the Operational Programme Research, Development and Education  CZ 02.1.01/0.0/0.0/16_013/0001791 

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Available from: 2019-07-25 Created: 2019-07-25 Last updated: 2019-07-25Bibliographically approved

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Eriksson, Olle

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