The magnetic and magnetocaloric properties of NdFe 12-x Mo x compounds
The magnetic and magnetocaloric properties of NdFe 12-x Mo x compounds
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DOI：
10.1063/1.3680204
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发表时间：
2012-04
影响因子：
3.2
通讯作者：
Y. Xia;H. Du;Jianhui Xu;Yan Zhang;Changsheng Wang;Jingzhi Han;Shunquan Liu;Qing Xu;Jinbo Y
中科院分区：
文献类型：
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作者：
Y. Xia;H. Du;Jianhui Xu;Yan Zhang;Changsheng Wang;Jingzhi Han;Shunquan Liu;Qing Xu;Jinbo Y
合成并研究了 NdFe12−xMox (x = 2.25, 2.5, 2.75, 3.0) 化合物的晶体结构和磁性能。这些化合物结晶为ThMn12型单相，居里温度随着Mo含量的增加而降低。 NdFe9.5Mo2.5的居里温度约为室温，由于二阶磁转变，在~290 K处观察到可逆磁熵变。对于 50 kOe 的磁场变化，在 290 K 时 -ΔSM 的最大值为 2.38 J kg-1 K-1。工作温度范围超过150 K，相对冷却功率达到357 J/kg，这使得该化合物成为磁制冷机近室温的有希望的候选者。
The crystal structure and magnetic properties of NdFe12−xMox (x = 2.25, 2.5, 2.75, 3.0) compounds were synthesized and investigated. These compounds crystallized in ThMn12-type single phase, and the Curie temperature decreased with increasing Mo content. NdFe9.5Mo2.5 has a Curie temperature around room temperature, and a reversible magnetic entropy change was observed ∼290 K due to the second-order magnetic transition. The maximum value of −ΔSM is 2.38 J kg-1 K-1 at 290 K for a magnetic field change of 50 kOe. The working temperature span is more than 150 K and the relative cooling power reaches 357 J/kg, which makes the compound a promising candidate for magnetic refrigerator vicinal room temperature.