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From soft to hard m...
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Reichel, L.IFW Dresden, D-01171 Dresden, Germany.;Tech Univ Dresden, Inst Mat Sci, Fac Mech Engn, D-01062 Dresden, Germany.
(author)
From soft to hard magnetic Fe-Co-B by spontaneous strain : a combined first principles and thin film study
- Article/chapterEnglish2015
Publisher, publication year, extent ...
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2015-11-09
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IOP Publishing,2015
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:uu-270417
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-270417URI
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https://doi.org/10.1088/0953-8984/27/47/476002DOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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In order to convert the well-known Fe-Co-B alloy from a soft to a hard magnet, we propose tetragonal strain by interstitial boron. Density functional theory reveals that when B atoms occupy octahedral interstitial sites, the bcc Fe-Co lattice is strained spontaneously. Such highly distorted Fe-Co is predicted to reach a strong magnetocrystalline anisotropy which may compete with shape anisotropy. To probe this theoretical suggestion experimentally, epitaxial films are examined. A spontaneous strain up to 5% lattice distortion is obtained for B content up to 4 at%, which leads to uniaxial anisotropy constants exceeding 0.5 MJ m(-3). However, a further addition of B results in a partial amorphisation, which degrades both anisotropy and magnetisation.
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Schultz, L.IFW Dresden, D-01171 Dresden, Germany.;Tech Univ Dresden, Inst Mat Sci, Fac Mech Engn, D-01062 Dresden, Germany.
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Pohl, D.IFW Dresden, D-01171 Dresden, Germany.
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Oswald, S.IFW Dresden, D-01171 Dresden, Germany.
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Faehler, S.IFW Dresden, D-01171 Dresden, Germany.
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Werwinski, MiroslawUppsala universitet,Materialteori(Swepub:uu)mirwe872
(author)
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Edstrom, AlexanderUppsala universitet,Materialteori(Swepub:uu)aleed268
(author)
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Delczeg-Czirjak, Erna K.Uppsala universitet,Materialteori(Swepub:uu)ernde783
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Rusz, JanUppsala universitet,Materialteori(Swepub:uu)janru887
(author)
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IFW Dresden, D-01171 Dresden, Germany.;Tech Univ Dresden, Inst Mat Sci, Fac Mech Engn, D-01062 Dresden, Germany.IFW Dresden, D-01171 Dresden, Germany.
(creator_code:org_t)
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In:Journal of Physics: IOP Publishing27:470953-89841361-648X
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