Cooling and heating by adiabatic magnetization in the Ni50Mn34In16 magnetic shape memory alloy

By X. Moya, L. Mañosa, A. Planes, S. Aksoy, M. Acet, E. Wassermann, T. Krenke. 2007

145 citations recorded by the source corpus.

We report on measurements of the adiabatic temperature change in the inverse magnetocaloric Ni50Mn34In16 alloy. It is shown that this alloy heats up with the application of a magnetic field around the Curie point due to the conventional magnetocaloric effect. In contrast, the inverse magnetocaloric effect associated with the martensitic transition results in the unusual decrease of temperature by adiabatic magnetization. We also provide magnetization and specific heat data which enable to compare the measured temperature changes to the values indirectly computed from thermodynamic relationships. Good agreement is obtained for the conventional effect at the second-order paramagnetic-ferromagnetic phase transition. However, at the first-order structural transition the measured values at high fields are lower than the computed ones. Irreversible thermodynamics arguments are given to show that such a discrepancy is due to the irreversibility of the first-order martensitic transition.

Subfields: Electronic, Optical and Magnetic Materials, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/2d242b4b3c61e3b20ff401eac760942d1a10b1a3

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In Electronic, Optical and Magnetic Materials

1. L. Mañosa
2. A. Planes
3. M. Acet

In Materials Chemistry

1. L. Mañosa
2. A. Planes
3. M. Acet

Citations in the corpus

• Magnetocaloric effect and its relation to shape-memory properties in ferromagnetic Heusler alloys (2009, background): “Results reported in [39] are consistent with this prediction.”