Magnetocaloric effect in melt-spun FePd ribbon alloy with second order phase transition
Magnetocaloric effect in melt-spun FePd ribbon alloy with second order phase transition
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DOI：
10.1016/j.jallcom.2010.09.060
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发表时间：
2011-01
影响因子：
6.2
通讯作者：
V. Prida;V. Franco;V. Vega;J. L. Sánchez-Llamazares;J. Suñol;A. Conde;B. Hernando
中科院分区：
文献类型：
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作者：
V. Prida;V. Franco;V. Vega;J. L. Sánchez-Llamazares;J. Suñol;A. Conde;B. Hernando
在293- 700 K温度范围内，测定了快淬态Fe_（73.2）Pd_（26.8）合金多晶薄带在外加磁场变化1.5T时的磁熵变和制冷量。样品的居里温度为553 K，在此温度下发生二级磁相变。在550 K时磁熵变最大，为1.04Jkg-1 K-1;在1.5T磁场下，制冷量最大，为108 J/kg。该材料的磁熵变的场依赖性遵循现象学的普遍曲线，并且在峰值的温度下对应于n=0.84的大的场独立指数。外推的5 T时的RCAreaat依赖于场的值达到300 J/kg以上，这与一些最著名的Fe掺杂的GdSiGe冷却剂化合物的RCAreaat相当。
Magnetic entropy change and refrigerant capacity for an applied magnetic field variation of 1.5T have been determined in the temperature range of 293–700K for the as-quenched polycrystalline Fe73.2Pd26.8melt-spun ribbons alloy. Samples show a major magnetic phase with the fct crystal structure and a Curie temperature of 553K, at which a second order magnetic phase transition occurs. A maximum magnetic entropy change of 1.04Jkg−1K−1was achieved at 550K, while the maximum refrigerant capacity of 108J/kg is attained at the applied field of 1.5T. The field dependence of the magnetic entropy change for this material follows the phenomenological universal curve and at the temperature of the peak corresponds to a large field independent exponent of n=0.84. Extrapolated value of field depending RCAreaat 5T reach above 300J/kg, which is comparable to that of some of the best-known Fe-doped GdSiGe coolant compounds.