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  Pulsed high-magnetic-field experiments: New insights into the magnetocaloric effect in Ni-Mn-In Heusler alloys

Salazar Mejía, C., Ghorbani Zavareh, M., Nayak, A. K., Skourski, Y., Wosnitza, J., Felser, C., et al. (2015). Pulsed high-magnetic-field experiments: New insights into the magnetocaloric effect in Ni-Mn-In Heusler alloys. Journal of Applied Physics, 117(17): 17E710, pp. 1-4. doi:10.1063/1.4916556.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-9D31-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-FD26-9
Genre: Journal Article

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 Creators:
Salazar Mejía, C.1, Author              
Ghorbani Zavareh, M.2, Author
Nayak, A. K.3, Author              
Skourski, Y.2, Author
Wosnitza, J.2, Author
Felser, C.4, Author              
Nicklas, M.5, Author              
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2External Organizations, ou_persistent22              
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: The present pulsed high-magnetic-field study on Ni 50Mn35In15 gives an extra insight into the thermodynamics of the martensitic transformation in Heusler shape-memory alloys. The transformation-entropy change, ΔS, was estimated from field-dependent magnetization experiments in pulsed high magnetic fields and by heat-capacity measurements in static fields. We found a decrease of ΔS with decreasing temperature. This behavior can be understood by considering the different signs of the lattice and magnetic contributions to the total entropy. Our results further imply that the magnetocaloric effect will decrease with decreasing temperature and, furthermore, the martensitic transition is not induced anymore by changing the temperature in high magnetic fields.

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Language(s): eng - English
 Dates: 2015-04-01
 Publication Status: Published in print
 Pages: -
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 Rev. Method: -
 Identifiers: DOI: 10.1063/1.4916556
BibTex Citekey: :/content/aip/journal/jap/117/17/10.1063/1.4916556
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Title: Journal of Applied Physics
  Abbreviation : J. Appl. Phys.
Source Genre: Journal
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Publ. Info: New York, NY : AIP Publishing
Pages: - Volume / Issue: 117 (17) Sequence Number: 17E710 Start / End Page: 1 - 4 Identifier: ISSN: 0021-8979
CoNE: /journals/resource/991042723401880