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Giant magnetocaloric effect in melt-spun Ni-Mn-Ga ribbons with magneto-multistructural transformation

Abstract : Magnetic refrigeration based on the magnetocaloric effect (MCE) may provide an energy-efficient and environment-friendly alternative to the conventional gas compression/expansion cooling technology. For potential applications, low-cost and high-performance magnetic refrigerants are in great need. Here, we demonstrate that giant MCE can be achieved in annealed Ni52Mn26Ga22 ribbons with magneto-multistructural transformation. It yields a maximum magnetic entropy change of -30.0 J kg(-1) K-1 at the magnetic field change of 5 T, being almost three times as that of initial melt-spun ribbons and comparable to or even superior to that of polycrystalline bulk alloys.
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https://hal.univ-lorraine.fr/hal-01503882
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Submitted on : Friday, April 7, 2017 - 5:16:41 PM
Last modification on : Monday, December 14, 2020 - 3:38:25 PM

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Zongbin Li, Yudong Zhang, C. F. Sanchez-Valdes, J. L. Sanchez Llamazares, Claude Esling, et al.. Giant magnetocaloric effect in melt-spun Ni-Mn-Ga ribbons with magneto-multistructural transformation. Applied Physics Letters, American Institute of Physics, 2014, 104 (4), ⟨10.1063/1.4863273⟩. ⟨hal-01503882⟩

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