Large magnetocaloric effect in La(FexSi1-x)13 itinerant-electron metamagnetic compounds
Large magnetocaloric effect in La(FexSi1-x)13 itinerant-electron metamagnetic compounds
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DOI：
10.1063/1.1498148
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发表时间：
2002-08-12
影响因子：
4
通讯作者：
Fukamichi, K
中科院分区：
文献类型：
--
作者：
Fujieda, S;Fujita, A;Fukamichi, K
本文研究了La（FexSi_（1-x））（13）化合物的巡游电子变磁相变引起的磁热效应。随着Fe含量的增加，MCE增强，当磁场从0变化到2 T时，x=0.90的化合物的等温磁熵变Δ S（m）和绝热温变Δ T（ad）分别为-28J/kg K和8.1K。类似的大MCE值在室温附近通过利用氢吸收控制居里温度来实现。因此，La（FexSi 1-x）（13）化合物作为在相对低的磁场下工作的磁制冷材料是有希望的。(C)2002年美国物理学会。
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.