Inverse magnetocaloric effect in ferromagnetic Ni–Mn–Sn alloys

By T. Krenke, E. Duman, M. Acet, E. Wassermann, X. Moya, L. Mañosa, A. Planes. Nature Materials, 2005

1,841 citations recorded by the source corpus.

The magnetocaloric effect (MCE) in paramagnetic materials has been widely used for attaining very low temperatures by applying a magnetic field isothermally and removing it adiabatically. The effect can also be exploited for room-temperature refrigeration by using giant MCE materials1,2,3. Here we report on an inverse situation in Ni–Mn–Sn alloys, whereby applying a magnetic field adiabatically, rather than removing it, causes the sample to cool. This has been known to occur in some intermetallic compounds, for which a moderate entropy increase can be induced when a field is applied, thus giving rise to an inverse magnetocaloric effect4,5. However, the entropy change found for some ferromagnetic Ni–Mn–Sn alloys is just as large as that reported for giant MCE materials, but with opposite sign. The giant inverse MCE has its origin in a martensitic phase transformation that modifies the magnetic exchange interactions through the change in the lattice parameters.

Subfields: Electronic, Optical and Magnetic Materials, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/bc5cef89aa3058b90d0dac7ffd92de1cf95a911c

How researchers see this paper

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In Electronic, Optical and Magnetic Materials

1. L. Mañosa
2. A. Planes
3. M. Acet
4. S. Kar‐Narayan
5. J. Tamarit
6. Qiuming Peng
7. M. Barrio
8. N. Mathur

In Materials Chemistry

1. Yadong Li
2. Dingsheng Wang
3. L. Mañosa
4. A. Planes
5. M. Acet
6. Qiuming Peng
7. S. Kar‐Narayan
8. N. Mathur

Citations in the corpus

• Nanocrystalline intermetallics and alloys (2010, background): “Since the discovery of intermetallic compounds of the type MNi5 (M = Th, U, or Zr) which perform as effective methanation catalysts [1], intermetallics, and alloys have emerged as a class of novel materials which provide great opportunities for the development of low-cost and high-performance indust”