Tuning magnetocaloric effect of Ho1-xGdxNi2 and HoNi2-yCoy alloys around hydrogen liquefaction temperature

Jiawei Lai, Xin Tang, Hossein Sepehri-Amin, Kazuhiro Hono

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)302-306
Number of pages5
JournalScripta Materialia
Volume188
DOIs
Publication statusPublished - 2020 Nov

Keywords

  • Curie temperature
  • HoNi alloys
  • Hydrogen liquefaction
  • Table-like magnetocaloric effect

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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