Please use this identifier to cite or link to this item:
Title: A multicaloric cooling cycle that exploits thermal hysteresis
Author: Gottschall, Tino
Gràcia Condal, Adrià
Fries, Maximilian
Taublel, A.
Pfeuffer, L.
Mañosa, Lluís
Planes Vila, Antoni
Skokov, K.P.
Gutfleisch, O.
Keywords: Histèresi
Propietats magnètiques
Ciència dels materials
Magnetic properties
Materials science
Issue Date: 2018
Publisher: Nature Publishing Group
Abstract: The giant magnetocaloric effect, in which large thermal changes are induced in a material on the application of a magnetic field, can be used for refrigeration applications, such as the cooling of systems from a small to a relatively large scale. However, commercial uptake is limited. We propose an approach to magnetic cooling that rejects the conventional idea that the hysteresis inherent in magnetostructural phase-change materials must be minimized to maximize the reversible magnetocaloric effect. Instead, we introduce a second stimulus, uniaxial stress, so that we can exploit the hysteresis. This allows us to lock-in the ferromagnetic phase as the magnetizing field is removed, which drastically removes the volume of the magnetic field source and so reduces the amount of expensive Nd-Fe-B permanent magnets needed for a magnetic refrigerator. In addition, the mass ratio between the magnetocaloric material and the permanent magnet can be increased, which allows scaling of the cooling power of a device simply by increasing the refrigerant body. The technical feasibility of this hysteresis-positive approach is demonstrated using Ni-Mn-In Heusler alloys. Our study could le
Note: Versió postprint del document publicat a:
It is part of: Nature Materials, 2018, vol. 17, p. 929-934
Related resource:
ISSN: 1476-1122
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

Files in This Item:
File Description SizeFormat 
685400.pdf5.17 MBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.