Magnetocaloric effect in the La0.8Ce0.2Fe11.4−xCoxSi1.6 compounds
Magnetocaloric effect in the La0.8Ce0.2Fe11.4−xCoxSi1.6 compounds
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DOI：
10.1016/j.jmmm.2008.03.004
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发表时间：
2009-11
影响因子：
2.7
通讯作者：
G. Wang;L. Song;Fei Li;Z. Ou;O. Tegus;E. Brück;K. Buschow
中科院分区：
文献类型：
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作者：
G. Wang;L. Song;Fei Li;Z. Ou;O. Tegus;E. Brück;K. Buschow
研究了Co取代Fe对La0.8Ce0.2Fe11.4−xCoxSi1.6(0，0.2，0.4，0.6，0.8和1.0)化合物磁性能和磁热性能的影响。X-射线衍射分析表明，所有化合物均为NaZn13型结构。磁性测量表明，Co含量从0到1可以在184~294K之间调节居里温度(TC)。当x=0、0.2和0.4时，样品发生场致甲磁相变。用麦克斯韦关系由等温磁化强度测量确定了化合物的磁熵变化。
The effects of substitution of Co for Fe on the magnetic and magnetocaloric properties of La0.8Ce0.2Fe11.4−xCoxSi1.6(0, 0.2, 0.4, 0.6, 0.8 and 1.0) compounds have been investigated. X-ray diffraction shows that all compounds crystallize in the NaZn13-type structure. Magnetic measurements show that the Curie temperature (TC) can be tuned between 184 and 294K by changing the Co content from 0 to 1. A field-induced methamagnetic transition occurs in samples with x=0, 0.2 and 0.4. The magnetic entropy changes of the compounds have been determined from the isothermal magnetization measurements by using the Maxwell relation.