A large inverse magnetocaloric effect has been observed in a single crystal at room temperature. Magnetothermal measurements performed at different magnetic fields reveal a nonmagnetic to ferromagnetic transition correlated with the austenite-martensite phase transformation. The Heusler single crystal shows a large entropy change of 30 J/Kg K at an applied magnetic field of 7 T during the first-order magnetostructural transition at 355 K. It leads to a net refrigerant capacity of 267 J/Kg at 7 T, which is very encouraging for magnetic refrigeration applications.
Large inverse magnetocaloric effect in single crystal above 300 K
Daniel Bourgault, Jérémy Tillier, Pierre Courtois, Denis Maillard, Xavier Chaud; Large inverse magnetocaloric effect in single crystal above 300 K. Appl. Phys. Lett. 29 March 2010; 96 (13): 132501. https://doi.org/10.1063/1.3372633
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