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  Large magnetocaloric effect and adiabatic demagnetization refrigeration with YbPt2Sn

Jang, D., Gruner, T., Steppke, A., Mitsumoto, K., Geibel, C., & Brando, M. (2015). Large magnetocaloric effect and adiabatic demagnetization refrigeration with YbPt2Sn. Nature Communications, 6: 8680, pp. 1-5. doi:10.1038/ncomms9680.

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 Creators:
Jang, Dongjin1, Author              
Gruner, Thomas2, Author              
Steppke, Alexander2, Author              
Mitsumoto, Keisuke3, Author
Geibel, Christoph4, Author              
Brando, Manuel5, Author              
Affiliations:
1Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
3External Organizations, ou_persistent22              
4Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863465              
5Manuel Brando, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863469              

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 Abstract: Adiabatic demagnetization is currently gaining strong interest in searching for alternatives to 3He-based refrigeration techniques for achieving temperatures below 2[thinsp]K. The main reasons for that are the recent shortage and high price of the rare helium isotope 3He. Here we report the discovery of a large magnetocaloric effect in the intermetallic compound YbPt2Sn, which allows adiabatic demagnetization cooling from 2[thinsp]K down to 0.2[thinsp]K. We demonstrate this with a home-made refrigerator. Other materials, for example, paramagnetic salts, are commonly used for the same purpose but none of them is metallic, a severe limitation for low-temperature applications. YbPt2Sn is a good metal with an extremely rare weak magnetic coupling between the Yb atoms, which prevents them from ordering above 0.25[thinsp]K, leaving enough entropy free for use in adiabatic demagnetization cooling. The large volumetric entropy capacity of YbPt2Sn guarantees also a good cooling power.

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Language(s): eng - English
 Dates: 2015-10-232015-10-23
 Publication Status: Published in print
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.1038/ncomms9680
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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 6 Sequence Number: 8680 Start / End Page: 1 - 5 Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723