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Hysteresis Design of Magnetocaloric Materials-From Basic Mechanisms to Applications

Scheibel, Franziska and Gottschall, Tino and Taubel, Andreas and Fries, Maximilian and Skokov, Konstantin P. and Terwey, Alexandra and Keune, Werner and Ollefs, Katharina and Wende, Heiko and Farle, Michael and Acet, Mehmet and Gutfleisch, Oliver and Gruner, Markus E. (2018):
Hysteresis Design of Magnetocaloric Materials-From Basic Mechanisms to Applications.
In: Energy Technology, 6 (8), pp. 1397-1428. ISSN 2194-4288,
DOI: 10.25534/tuprints-00013405,
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Item Type: Article
Title: Hysteresis Design of Magnetocaloric Materials-From Basic Mechanisms to Applications
Language: English
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.

Journal or Publication Title: Energy Technology
Journal volume: 6
Number: 8
Classification DDC: 500 Naturwissenschaften und Mathematik > 500 Naturwissenschaften
500 Naturwissenschaften und Mathematik > 530 Physik
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
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
05 Department of Physics > Institute for condensed matter physics > Experimental Condensed Matter Physics
05 Department of Physics > Institute for condensed matter physics > Theoretische Festkörperphysik
Date Deposited: 04 Sep 2020 05:49
Last Modified: 05 Sep 2020 16:14
DOI: 10.25534/tuprints-00013405
Official URL: https://doi.org/10.1002/ente.201800264
URN: urn:nbn:de:tuda-tuprints-134051
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/13405
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