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首页> 外文会议>7th international conference on magnetic refrigeration at room temperature >MAGNETOCALORIC EFFECT IN SEVERE PLASTIC DEFORMED Gd-X (X=In, Ga, B, Y, Zr)
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MAGNETOCALORIC EFFECT IN SEVERE PLASTIC DEFORMED Gd-X (X=In, Ga, B, Y, Zr)

机译：严重塑性变形Gd-X（X = In，Ga，B，Y，Zr）的磁热效应

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摘要

Nowadays, a bottleneck in designing an effective heat exchanger for magnetic refrigeration devices is the development of magnetocaloric materials exhibiting a good magnetocaloric effect in a wide temperature range suitable for utilization in active magnetic refrigeration (AMR) cycle. One of the best candidates is Gd solid solutions in which one can tune Curie temperature T_c by doping solvent element with a subsequent decreasing magnetocaloric effect. Solid solutions of Gd treated with the help of cold rolling in severe regime (relative deformation is about 60 times) show unusual magnetic properties initialized by induced magnetic anisotropy. Although magnetization, heat capacity, magnetocaloric effect are depressed, they can be completely restored by a proper thermal treatment of the rolled specimens. It was shown that Gd-Y, Gd-In and Gd-Zr solid solutions have comparable to pure Gd magnetocaloric effect in a wide temperature window up to 37 K, 35 K, and 16 K, respectively, and therefore they can be useful for designing an effective AMR heat exchanger.
机译：如今，设计用于磁制冷装置的有效热交换器的瓶颈是开发磁热材料，该材料在适合于主动磁制冷（AMR）循环的宽温度范围内显示出良好的磁热效应。最好的候选者之一是Gd固溶体，其中可以通过掺杂溶剂元素并随后降低磁热效应来调节居里温度T_c。在严峻条件下（相对变形约为60倍），通过冷轧处理的Gd固溶体显示出异常的磁性能，该磁性能由感应磁各向异性初始化。尽管磁化，热容量，磁热效应受到抑制，但通过对轧制试样进行适当的热处理，它们可以完全恢复。结果表明，在高达37 K，35 K和16 K的宽温度范围内，Gd-Y，Gd-In和Gd-Zr固溶体具有与纯Gd磁热效应相当的性能，因此它们可用于设计有效的AMR热交换器。

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