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Hysteresis Design of Magnetocaloric Materials-From Basic Mechanisms to Applications

Scheibel, Franziska ; Gottschall, Tino ; Taubel, Andreas ; Fries, Maximilian ; Skokov, Konstantin P. ; Terwey, Alexandra ; Keune, Werner ; Ollefs, Katharina ; Wende, Heiko ; Farle, Michael ; Acet, Mehmet ; Gutfleisch, Oliver ; Gruner, Markus E. (2020)
Hysteresis Design of Magnetocaloric Materials-From Basic Mechanisms to Applications.
In: Energy Technology, 2018, 6 (8)
doi: 10.25534/tuprints-00013405
Article, Secondary publication

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Item Type: Article
Type of entry: Secondary publication
Title: Hysteresis Design of Magnetocaloric Materials-From Basic Mechanisms to Applications
Language: English
Date: 4 September 2020
Place of Publication: Darmstadt
Year of primary publication: 2018
Journal or Publication Title: Energy Technology
Volume of the journal: 6
Issue Number: 8
DOI: 10.25534/tuprints-00013405
URL / URN: https://doi.org/10.1002/ente.201800264
Origin: Secondary publication
Abstract:

Magnetic refrigeration relies on a substantial entropy change in a magnetocaloric material when a magnetic field is applied. Such entropy changes are present at first‐order magnetostructural transitions around a specific temperature at which the applied magnetic field induces a magnetostructural phase transition and causes a conventional or inverse magnetocaloric effect (MCE). First‐order magnetostructural transitions show large effects, but involve transitional hysteresis, which is a loss source that hinders the reversibility of the adiabatic temperature change ΔTad. However, reversibility is required for the efficient operation of the heat pump. Thus, it is the mastering of that hysteresis that is the key challenge to advance magnetocaloric materials. We review the origin of the large MCE and of the hysteresis in the most promising first‐order magnetocaloric materials such as Ni–Mn‐based Heusler alloys, FeRh, La(FeSi)13‐based compounds, Mn3GaC antiperovskites, and Fe2P compounds. We discuss the microscopic contributions of the entropy change, the magnetic interactions, the effect of hysteresis on the reversible MCE, and the size‐ and time‐dependence of the MCE at magnetostructural transitions.

URN: urn:nbn:de:tuda-tuprints-134051
Classification DDC: 500 Science and mathematics > 500 Science
500 Science and mathematics > 530 Physics
600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Functional Materials
05 Department of Physics > Institute for condensed matter physics (2021 merged in Institute for Condensed Matter Physics)
05 Department of Physics > Institute for condensed matter physics (2021 merged in Institute for Condensed Matter Physics) > Experimental Condensed Matter Physics
05 Department of Physics > Institute for condensed matter physics (2021 merged in Institute for Condensed Matter Physics) > Theoretische Festkörperphysik
Date Deposited: 04 Sep 2020 05:49
Last Modified: 16 Jan 2024 12:23
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/13405
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