Large magnetocaloric effect in TbCo3B2 compound

Large magnetocaloric effect in TbCo3B2 compound
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TbCo3B2 化合物中的大磁热效应

DOI:
10.1016/j.jallcom.2010.10.043
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发表时间:
2011-02
影响因子:
6.2
通讯作者:
Igawa, Hiroto
Igawa, Hiroto
中科院分区:
材料科学2区
文献类型:
--
作者:
Huo, Dexuan;Li, Lingwei;Nishimura, Katsuhiko;Igawa, Hiroto

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采用电弧炉熔炼法制备了单相TbCo3B2化合物。通过磁化强度和热容的测量,研究了其磁性能和磁热效应。在Tb-Tb亚晶格有序温度附近观察到了伴随着二级相变的大的可逆磁热效应。当磁场变化为2T和7T时,磁体的最大磁熵变(−Δ)分别达到4.9J和10.3J kg−1K−1,在30K附近没有明显的磁滞损耗。相应的最大绝热温度变化(Δ)分别为4.0K和8.6K。讨论了TbCo3B2的磁相变和大尺寸MCE的来源。
A single-phased TbCo3B2compound has been prepared by an arc-melting method. The magnetic properties and magnetocaloric effect (MCE) have been studied by the magnetization and heat capacity measurements. A large reversible magnetocaloric effect has been observed accompanied by a second-order phase transition at around Tb–Tb sublattice ordering temperature. The values of maximum magnetic entropy change (−ΔSMmax) reach 4.9 and 10.3Jkg−1K−1for the field change of 2 and 7T with no obvious hysteresis loss around 30K, respectively. The corresponding maximum adiabatic temperature changes (ΔTadmax) are evaluated to be 4.0 and 8.6K. The magnetic transition and the origin of large MCE in TbCo3B2were discussed.
DOI: 10.1088/0022-3727/42/14/145003
发表时间: 2009-06
期刊: Journal of Physics D: Applied Physics
影响因子: --
作者:
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