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

SCRIPTA MATERIALIA

卷:188

Article

Lai, Jiawei¹  Tang, Xin¹  Sepehri-Amin, Hossein¹  Hono, Kazuhiro¹ 

[1] Natl Inst Mat Sci, Res Ctr Magnet & Spintron Mat, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan

关键词: Table-like magnetocaloric effect;    HoNi2 alloys;    Curie temperature;    Hydrogen liquefaction;   

DOI  :  10.1016/j.scriptamat.2020.07.046

来源: Elsevier

【 摘 要 】

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. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free