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Giant irreversibility of the inverse magnetocaloric effect in the Ni47Mn40Sn12.5Cu0.5 Heusler alloy.
- Source :
- Applied Physics Letters; 11/13/2023, Vol. 123 Issue 20, p1-6, 6p
- Publication Year :
- 2023
-
Abstract
- Direct studies of the adiabatic temperature change (ΔT<subscript>ad</subscript>) in the Ni<subscript>47</subscript>Mn<subscript>40</subscript>Sn<subscript>12.5</subscript>Cu<subscript>0.5</subscript> Heusler alloy in steady magnetic fields up to 8 T by the extraction method and in pulsed magnetic fields up to 50 T were carried out in this paper. The alloy Ni<subscript>47</subscript>Mn<subscript>40</subscript>Sn<subscript>12.5</subscript>Cu<subscript>0.5</subscript> demonstrates a magnetostructural phase transition (MSPT) of the first order in the 254–283 K temperature range as well as a second order phase transition near the Curie temperature T<subscript>C</subscript> = 313 K. An inverse magnetocaloric effect (MCE) was found in the region of the MSPT, and it reaches the maximum value ΔT<subscript>ad</subscript> = −12 K in 20 T at the initial temperature T<subscript>0</subscript> = 275 K. The irreversible part of the MCE reached ΔT<subscript>ir</subscript> = −10 K when the field is completely removed. We consider the dynamics of the MCE in the vicinity of the MSPT and discuss the mechanisms that cause the giant irreversibility of the MCE as well as the possibilities of its application in hybrid cooling systems. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 123
- Issue :
- 20
- Database :
- Complementary Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 173703372
- Full Text :
- https://doi.org/10.1063/5.0176772