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

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

doi:10.1016/j.scriptamat.2020.07.046

Tuning magnetocaloric effect of Ho_1-_xGd_xNi₂ and HoNi_2-_yCo_y alloys around hydrogen liquefaction temperature

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

International Center for Synchrotron Radiation Innovation Smart (SRIS)

National Institute for Materials Science Tsukuba

Research output: Contribution to journal › Article › peer-review

11 Citations (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 Ho_1-_xGd_xNi_2-_yCo_y. While the Curie temperature of Ho_1-_xGd_xNi_2-_yCo_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.

Original language	English
Pages (from-to)	302-306
Number of pages	5
Journal	Scripta Materialia
Volume	188
DOIs	https://doi.org/10.1016/j.scriptamat.2020.07.046
Publication status	Published - 2020 Nov

Keywords

Curie temperature
HoNi alloys
Hydrogen liquefaction
Table-like magnetocaloric effect

Access to Document

10.1016/j.scriptamat.2020.07.046

Cite this

@article{08bfc9e39ed24bd08ad6b545c1dc1b85,

title = "Tuning magnetocaloric effect of Ho1-xGdxNi2 and HoNi2-yCoy alloys around hydrogen liquefaction temperature",

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.",

keywords = "Curie temperature, HoNi alloys, Hydrogen liquefaction, Table-like magnetocaloric effect",

author = "Jiawei Lai and Xin Tang and Hossein Sepehri-Amin and Kazuhiro Hono",

note = "Funding Information: This work was supported by the JST-Mirai Program Grant Number JPMJMI18A3 , Japan. Publisher Copyright: {\textcopyright} 2020",

year = "2020",

month = nov,

doi = "10.1016/j.scriptamat.2020.07.046",

language = "English",

volume = "188",

pages = "302--306",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Elsevier Ltd.",

}

TY - JOUR

T1 - Tuning magnetocaloric effect of Ho1-xGdxNi2 and HoNi2-yCoy alloys around hydrogen liquefaction temperature

AU - Lai, Jiawei

AU - Tang, Xin

AU - Sepehri-Amin, Hossein

AU - Hono, Kazuhiro

PY - 2020/11

Y1 - 2020/11

N2 - 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.

AB - 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.

KW - Curie temperature

KW - HoNi alloys

KW - Hydrogen liquefaction

KW - Table-like magnetocaloric effect

UR - http://www.scopus.com/inward/record.url?scp=85088888995&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85088888995&partnerID=8YFLogxK

U2 - 10.1016/j.scriptamat.2020.07.046

DO - 10.1016/j.scriptamat.2020.07.046

M3 - Article

AN - SCOPUS:85088888995

SN - 1359-6462

VL - 188

SP - 302

EP - 306

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Tuning magnetocaloric effect of Ho_1-_xGd_xNi₂ and HoNi_2-_yCo_y alloys around hydrogen liquefaction temperature

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this