Large magnetocaloric effect in La(FexSi1-x)13 itinerant-electron metamagnetic compounds

被引：459

作者：

Fujieda, S ^{[1
]}

Fujita, A ^{[1
]}

Fukamichi, K ^{[1
]}

机构：

[1] Tohoku Univ, Dept Mat Sci, Grad Sch Engn, Sendai, Miyagi 9808579, Japan

来源：

APPLIED PHYSICS LETTERS | 2002年 / 81卷 / 07期

关键词：

D O I：

10.1063/1.1498148

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The magnetocaloric effect (MCE) originated from the itinerant-electron metamagnetic transition for La(FexSi1-x)(13) compounds has been investigated. With increasing Fe concentration, the MCE is enhanced and both the isothermal magnetic entropy change DeltaS(m) and the adiabatic temperature change DeltaT(ad) for the compound with x=0.90 are -28 J/kg K and 8.1 K, respectively, by changing the magnetic field from 0 to 2 T. Similar large MCE values are achieved around room temperature by controlling the Curie temperature by means of hydrogen absorption. Consequently, La(FexSi1-x)(13) compounds are promising as magnetic refrigerant materials working in relatively low magnetic fields. (C) 2002 American Institute of Physics.

引用

页码：1276 / 1278

页数：3

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