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  Direct measurements of the magnetocaloric effect in pulsed magnetic fields: The example of the Heusler alloy Ni50Mn35In15

Zavareh, M. G., Salazar Mejía, C., Nayak, A. K., Skourski, Y., Wosnitza, J., Felser, C., et al. (2015). Direct measurements of the magnetocaloric effect in pulsed magnetic fields: The example of the Heusler alloy Ni50Mn35In15. Applied Physics Letters, 106(7): 071904, pp. 1-4. doi:10.1063/1.4913446.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-B658-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-FD21-E
Genre: Journal Article

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Zavareh, M. Ghorbani1, Author
Salazar Mejía, C.2, Author              
Nayak, A. K.3, Author              
Skourski, Y.1, Author
Wosnitza, J.1, Author
Felser, C.4, Author              
Nicklas, M.5, Author              
Affiliations:
1External Organizations, ou_persistent22              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
3Ajaya Nayak, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863426              
4Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              
5Michael Nicklas, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863472              

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 Abstract: We have studied the magnetocaloric effect (MCE) in the shape-memory Heusler alloy Ni50Mn35In15 by direct measurements in pulsed magnetic fields up to 6 and 20 T. The results in 6 T are compared with data obtained from heat-capacity experiments. We find a saturation of the inverse MCE, related to the first-order martensitic transition, with a maximum adiabatic temperature change of Delta T-ad = -7 K at 250K and a conventional field-dependent MCE near the second-order ferromagnetic transition in the austenitic phase. The pulsed magnetic field data allow for an analysis of the temperature response of the sample to the magnetic field on a time scale of similar to 10 to 100 ms, which is on the order of typical operation frequencies (10-100 Hz) of magnetocaloric cooling devices. Our results disclose that in shape-memory alloys, the different contributions to the MCE and hysteresis effects around the martensitic transition have to be carefully considered for future cooling applications. (C) 2015 AIP Publishing LLC.

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Language(s): eng - English
 Dates: 2015-02-162015-02-20
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000350227300016
DOI: 10.1063/1.4913446
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Title: Applied Physics Letters
  Abbreviation : Appl. Phys. Lett.
Source Genre: Journal
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Publ. Info: Melville, NY : American Institute of Physics
Pages: - Volume / Issue: 106 (7) Sequence Number: 071904 Start / End Page: 1 - 4 Identifier: Other: 0003-6951
CoNE: /journals/resource/954922836223