Enhancements of Magnetocaloric Effects in La(Fe0:90Si0:10)13 and Its Hydride by Partial Substitution of Ce for La
Enhancements of Magnetocaloric Effects in La(Fe0:90Si0:10)13 and Its Hydride by Partial Substitution of Ce for La
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DOI：
10.2320/matertrans.45.3228
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发表时间：
2004-11
影响因子：
1.2
通讯作者：
S. Fujieda;A. Fujita;K. Fukamichi
中科院分区：
文献类型：
--
作者：
S. Fujieda;A. Fujita;K. Fukamichi
由于 La(Fe 0 . 9 0 Si 0. 1 0 ) 1 3 化合物的巡回电子变磁转变而产生的磁热效应通过部分替代 La 的 Ce 得到增强。La 1 - z Ce z (Fe 0 . 9 0 Si 0 . 1 ) 的等温磁熵变 ΔS m 和绝热温度变化 ΔT a d 的值z=0.1的0 ) 1 3 化合物分别为-32J/kgK和12.8K，在磁场从0到4T变化的情况下，居里温度以上。通过吸氢，在室温附近也可以获得如此大的磁热效应。在 1373 K 下退火 20 天可以实现最高 z = 0.2 的替代。
Magnetocaloric effects due to the itinerant-electron metamagnetic transition for La(Fe 0 . 9 0 Si 0 . 1 0 ) 1 3 compounds promising as refrigerants are enhanced by a partial substitution of Ce for La. The values of the isothermal magnetic entropy change ΔS m and the adiabatic temperature change ΔT a d for La 1 - z Ce z (Fe 0 . 9 0 Si 0 . 1 0 ) 1 3 compound with z = 0.1 are -32J/kgK and 12.8K, respectively, just above the Curie temperature in the magnetic field change from 0 to 4 T. Such large magnetocaloric effects can also be obtained in the vicinity of room temperature by hydrogen absorption. Annealing at 1373 K for 20 days makes it possible to substitute up to z = 0.2.