Large magnetic entropy change and low hysteresis loss in the Nd- and Co-doped La(Fe,Si)13 compounds
Large magnetic entropy change and low hysteresis loss in the Nd- and Co-doped La(Fe,Si)13 compounds
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DOI：
10.1063/1.2829035
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发表时间：
2008-01
影响因子：
3.2
通讯作者：
Jun Shen;Yangxiang Li;Jian Zhang;B. Gao;F. Hu;Hong-wei Zhang;Yunzhong Chen;Chuanbing Rong;Jirong Sun
中科院分区：
文献类型：
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作者：
Jun Shen;Yangxiang Li;Jian Zhang;B. Gao;F. Hu;Hong-wei Zhang;Yunzhong Chen;Chuanbing Rong;Jirong Sun
研究了Nd和Co替代对立方NaZn 13型LaFe 13 −xSix化合物磁熵变和磁滞损耗的影响。用Nd部分取代La，使居里温度TC降低，磁熵变ΔS增大。Co替代La_（0.7）Nd_（0.3）Fe_（10.5）Si_（1.5）中的Fe可将TC调节到室温附近。La_（0.7）Nd_（0.3）Fe_（10.7）Co_（0.8）Si_（1.5）在TC= 280 K时，在0 ~ 5 T的磁场变化范围内，获得了15 J闪烁KgK的大ΔS，在TC附近获得了接近于零的小磁滞损耗。Co掺杂的NaZn_（13）型LaNdFeSi化合物可能是室温附近磁制冷剂的合适候选者。
The effect of Nd and Co substitution on magnetic entropy changes and hysteresis losses has been investigated for the cubic NaZn13-type LaFe13−xSix compounds. Partially replacing La with Nd leads to a decrease of the Curie temperature TC and an increase of the magnetic entropy change ΔS. Substitution of Co for Fe in La0.7Nd0.3Fe10.5Si1.5 can adjust TC to around room temperature. A large ΔS of 15J∕KgK at TC=280K for a field change from 0to5T and a small hysteresis loss close to zero near TC have been obtained in La0.7Nd0.3Fe10.7Co0.8Si1.5. The Co-doped NaZn13-type LaNdFeSi compounds may be a suitable candidate for magnetic refrigerant near room temperature.