Magnetic properties and magnetocaloric effect of HoCo3B2 compound

Magnetic properties and magnetocaloric effect of HoCo3B2 compound
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HoCo3B2化合物的磁性能和磁热效应

DOI:
10.1063/1.5006505
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发表时间:
2018-01
期刊:
影响因子:
1.6
通讯作者:
B. G. Shen
B. G. Shen
中科院分区:
材料科学4区
文献类型:
--
作者:
X. Q. Zheng;J. W. Xu.;H. Zhang;J. Y. Zhang;S. G. Wang;Y. Zhang;Y. Z. Xu;L. C. Wang;B. G. Shen

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合成了HoCo3B2化合物样品,并对其磁性和MCE性能进行了研究。化合物表现为R-R (R =稀土)亚晶格磁序转变,转变温度为11.8 K (TC)。在TC附近的Arrott曲线斜率为正,表明发生了二级相变。根据等温磁化数据,结合麦克斯韦关系,计算了磁熵变化(-ΔSM)。0-2 T、0-5 T和0-7 T田间最大-ΔSM分别为7.8、12.7和14.4 J/kg K。因此,在上述现场范围内,RC(制冷剂容量)值分别为99、289和432 J/kg。HoCo3B2化合物的MCE较大,表明其在低温磁致冷领域具有潜在的应用前景。
A sample of HoCo3B2 compound was synthesized, and the magnetic and MCE properties were investigated. Compound shows a change corresponding to R-R (R = rare earth) sublattice magnetic order transition and the transition temperature is determined to be 11.8 K (TC). The characteristic of Arrott plots with positive slope around TC was observed, indicating a second-order phase transition. Based on isothermal magnetization data, together with Maxwell’s relationship, the magnetic entropy change (-ΔSM) was calculated. The maximum -ΔSM reaches 7.8, 12.7 and 14.4 J/kg K for field range of 0-2 T, 0-5 T and 0-7 T, respectively. Accordingly, the value of RC (refrigerant capacity) is 99, 289 and 432 J/kg for above field ranges. The large MCE of HoCo3B2 compound indicates its potential application for magnetic refrigeration in low temperature range.
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发表时间: 2012-09
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