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Description:

We show the giant magnetocaloric effect of HoNi2 compound can be tuned around hydrogen liquefaction temperature by substituting Ho with Gd and Ni with Co in Ho1-xGdxNi2-yCoy. While the Curie temperature of Ho1-xGdxNi2-yCoy can be tuned from 15 to 32 K originating from the lattice expansion of the cubic structure, giant entropy change of 22.0 J/kgK is retained near the hydrogen liquefaction temperature. A table-like entropy change observed in a broad temperature range of 20 to 32 K makes them promising as magnetocaloric materials for cryogenic magnetic refrigeration utilizing an Ericsson cycle.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: Magnetocaloric Materials, Cryogenic, Magnetic entropy

Date published: 2020-08-04

Publisher: Elsevier BV

Journal:

• Scripta Materialia (ISSN: 13596462) vol. 188 p. 302-306

Funding:

• Japan Science and Technology Corporation

Manuscript type: Author's version (Submitted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4964

First published URL: https://doi.org/10.1016/j.scriptamat.2020.07.046

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Updated at: 2024-11-16 08:30:37 +0900

Published on MDR: 2024-11-16 08:30:37 +0900