磁制冷
变质磁性
居里温度
等温过程
凝聚态物理
制冷剂
绝热过程
磁场
材料科学
电子
铁磁性
磁化
热力学
物理
量子力学
气体压缩机
作者
Shun Fujieda,A. Fujita,K. Fukamichi
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 ΔSm and the adiabatic temperature change ΔTad 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.
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