Tuning magnetocaloric effect of Ho1-xGdxNi2 and HoNi2-yCoy alloys around hydrogen liquefaction temperature. (November 2020)

• Record Type: Journal Article
• Authors: Lai, Jiawei; Tang, Xin; Sepehri-Amin, Hossein; Hono, Kazuhiro
• Is Part Of: Scripta materialia. Number 188(2020)
• Page Start: 302
• Page End: 306
• Publication Date: 2020-11
• Subjects: Table-like magnetocaloric effect -- HoNi2 alloys -- Curie temperature -- Hydrogen liquefaction; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.07.046
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstact: 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- x Gd x Ni2- y Co y . While the Curie temperature of Ho1- x Gd x Ni2- y Co y 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. Graphical abstract: Image, graphical abstract