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  Role of disorder when upscaling magnetocaloric Ni–Co–Mn–Al Heusler alloys from thin films to ribbons

Weise, B., Dutta, B., Teichert, N., Hütten, A., Hickel, T., & Waske, A. (2018). Role of disorder when upscaling magnetocaloric Ni–Co–Mn–Al Heusler alloys from thin films to ribbons. Scientific Reports, 8(1): 9147. doi:10.1038/s41598-018-27428-8.

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Datensatz-Permalink: http://hdl.handle.net/21.11116/0000-0001-AE41-2 Versions-Permalink: http://hdl.handle.net/21.11116/0000-0001-AE46-D
Genre: Zeitschriftenartikel

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 Urheber:
Weise, Bruno1, 2, Autor              
Dutta, Biswanath3, Autor              
Teichert, Niclas4, Autor              
Hütten, Andreas4, Autor              
Hickel, Tilmann3, Autor              
Waske, Anja1, 2, Autor              
Affiliations:
1Institute for Material Science, TU Dresden, Dresden, Germany, persistent22              
2Leibniz Institute for Solid State and Material Research Dresden, Dresden, Germany, persistent22              
3Computational Phase Studies, Computational Materials Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863341              
4Department of Physics, Thin Films and Physics of Nanostructures, Bielefeld University, 33501 Bielefeld, Germany, ou_persistent22              

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 Zusammenfassung: Research in functional magnetic materials often employs thin films as model systems for finding new chemical compositions with promising properties. However, the scale-up of thin films towards bulk-like structures is challenging, since the material synthesis conditions are entirely different for thin films and e.g. rapid quenching methods. As one of the consequences, the type and degree of order in thin films and melt-spun ribbons are usually different, leading to different magnetic properties. In this work, using the example of magnetocaloric Ni-Co-Mn-Al melt-spun ribbons and thin films, we show that the excellent functional properties of the films can be reproduced also in ribbons, if an appropriate heat treatment is applied, that installs the right degree of order in the ribbons. We show that some chemical disorder is needed to get a pronounced and sharp martensitic transition. Increasing the order with annealing improves the magnetic properties only up to a point where selected types of disorder survive, which in turn compromise the magnetic properties. These findings allow us to understand the impact of the type and degree of disorder on the functional properties, paving the way for a faster transfer of combinatorial thin film research towards bulk-like materials for magnetic Heusler alloys. © 2018 The Author(s).

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Sprache(n): eng - Englisch
 Datum: 2018-12-01
 Publikationsstatus: Im Druck veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1038/s41598-018-27428-8
BibTex Citekey: Weise2018
 Art des Abschluß: -

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Titel: Scientific Reports
  Kurztitel : Sci. Rep.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: London, UK : Nature Publishing Group
Seiten: - Band / Heft: 8 (1) Artikelnummer: 9147 Start- / Endseite: - Identifikator: ISSN: 2045-2322
CoNE: /journals/resource/2045-2322