Itinerant-electron metamagnetic transition and large magnetocaloric effects in La(FexSi1-x)13 compounds and their hydrides

A. Fujita, Shun Fujieda, Y. Hasegawa, K. Fukamichi

研究成果: Article査読

979 被引用数 (Scopus)

抄録

The itinerant-electron metamagnetic (IEM) transition and magnetocaloric effects (MCE's) in the La(FexSi1-x)13 and La(FexSi1-x)13Hy compounds have been investigated. The La(FexSi1-x)13 compounds exhibit large values of both the isothermal entropy change ΔSm and the adiabatic temperature change ΔTad around the Curie temperature TC in relatively low magnetic fields. Such large MCE's are explained by a large magnetization change at TC and a strong temperature dependence of the critical field BC for the IEM transition. By hydrogen absorption into the compounds, TC is increased up to about 330 K, keeping the metamagnetic transition properties. Accordingly, the extension of the working temperature range having the large MCE's in relatively low magnetic fields is demonstrated by controlling y in the La(FexSi1-x)13Hy compounds. The correlation between the increase of TC and the large MCE's in the La(FexSi1-x)13Hy compounds is discussed by taking the magnetovolume effects into consideration.

本文言語English
論文番号104416
ページ(範囲)1044161-10441612
ページ数9397452
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
67
10
出版ステータスPublished - 2003 3 15

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

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