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  Reversible and irreversible magnetocaloric effect: The cases of rare-earth intermetallics YbPt2Sn and Ce0.5La0.5B6

Gruner, T., Kim, D., Brando, M., Dukhnenko, A. V., Shitsevalova, N. Y., Filipov, V. B., et al. (2019). Reversible and irreversible magnetocaloric effect: The cases of rare-earth intermetallics YbPt2Sn and Ce0.5La0.5B6. Journal of Magnetism and Magnetic Materials, 489: 165389, pp. 1-8. doi:10.1016/j.jmmm.2019.165389.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-D8A6-E Version Permalink: http://hdl.handle.net/21.11116/0000-0003-D8A8-C
Genre: Journal Article

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 Creators:
Gruner, Thomas1, Author
Kim, Daeho1, Author
Brando, Manuel2, Author              
Dukhnenko, Anatoliy V.1, Author
Shitsevalova, Natalya Y.1, Author
Filipov, Volodymyr B.1, Author
Jang, Dongjin1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Manuel Brando, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863469              

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Free keywords: Cerium alloys; Entropy; Intermetallics; Lanthanum alloys; Paramagnetism; Phase transitions; Platinum alloys; Rare earths; Ternary alloys; Tin alloys; Ytterbium alloys, Cerium hexaboride; Equilibrium thermodynamics; Magentocaloric effect; Magnetic phase boundaries; Magnetocaloric effect (MCE); Magnetocaloric materials; Phenomenological modeling; YbPt2Sn, Magnetocaloric effects
 Abstract: Magnetocaloric effect (MCE) has drawn much attention because its magnetic cooling property enables refrigeration without producing noxious gas or using rapidly depleting resources. However, applications for everyday life are yet distant. In addition, we need to understand more about the practical aspect of the MCE. Here, we introduce a phenomenological model to explain the quasi-adiabatic MCE. Correction factors to the equilibrium thermodynamic feature implied by the entropy landscape are devised in analytic forms. To demonstrate the validity of the model, the MCE from two different materials is investigated. The recently discovered metallic paramagnet, YbPt2Sn, shows a linear and reversible MCE which is typical of a paramagnetic system and suitable for cryogenics without 3He. On the other hand, a complex-phase material, Ce0.5La0.5B6, exhibits a pronounced irreversible MCE especially across a magnetic phase boundary. A term that describes the field induced heating near a phase transition turns out to be essential in resolving the irreversible, non-equilibrium MCE. © 2019

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Language(s): eng - English
 Dates: 2019-05-312019-05-31
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1016/j.jmmm.2019.165389
 Degree: -

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Title: Journal of Magnetism and Magnetic Materials
  Other : Journal of Magnetism and Magnetic Materials: MMM
  Abbreviation : J. Magn. Magn. Mater.
Source Genre: Journal
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Publ. Info: Amsterdam : NH, Elsevier
Pages: - Volume / Issue: 489 Sequence Number: 165389 Start / End Page: 1 - 8 Identifier: ISSN: 0304-8853
CoNE: https://pure.mpg.de/cone/journals/resource/954925512464