Control of working temperature of isothermal magnetic entropy change in La0.8Nd0.2(Fe0.88Si0.12)13 by hydrogen absorption for magnetic refrigerants

S. Fujieda, A. Fujita, K. Fukamichi, S. Suzuki

研究成果: Article査読

1 被引用数 (Scopus)

抄録

La1-zNdz(Fe0.88Si0.12)13 and their hydrides were investigated to obtain large magnetocaloric effects (MCEs) in a wide temperature range, including room temperature, for applications in magnetic refrigents. Since the magnetization change due to the itinerant-electron metamagentic (IEM) transition for La1-zNdz(Fe0.88Si0.12)13 becomes larger with increasing z, the isothermal magnetic entropy change ΔSm and the relative cooling power (RCP) are enhanced. In addition, the Curie temperatrue TC of La0.8Nd0.2(Fe0.88Si0.12)13 is increased from 193 to 319 K by hydrogen absorption, with the IEM transition. The maximum value of -ΔSm,-ΔSm max, in a magnetic field change of 2 T for La0.8Nd0.2(Fe0.88Si0.12)13H1.1 is about 23 J/kg K at TC=288 K, which is larger than that of 19 J/ kg K at TC=276 K for La(Fe0.88Si0.12)13H1.0. The value of RCP=179 J/kg of the former is also larger than 160 J/ kg of the latter. It is concluded that the partial substitution of Nd improves MCEs in a wide temperautre range, including room temperature.

本文言語English
ページ(範囲)150-154
ページ数5
ジャーナルJournal of Magnetics
18
2
DOI
出版ステータスPublished - 2013

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 電子工学および電気工学

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