Analysis of the magnetic transition and magnetocaloric effect in Mn5Ge2.9Ag0.1 compound
Analysis of the magnetic transition and magnetocaloric effect in Mn5Ge2.9Ag0.1 compound
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Mn5Ge2.9Ag0.1化合物的磁转变和磁热效应分析
DOI:
10.1016/j.jallcom.2019.04.206
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发表时间:
2019-07
影响因子:
6.2
通讯作者:
Si Hongtao
中科院分区:
文献类型:
--
作者:
Si Xiaodong;Liu Yongsheng;Zhang Zhanxian;Ma Xinxiu;Lin Jia;Luo Xiaojing;Zhong Yunbo;Si Hongtao
Here we investigate analytical models to understand magnetic and magnetocaloric properties of Mn5Ge2.9Ag0.1compound prepared by arc-melting method. The Mn5Ge2.9Ag0.1alloy, undergoing a second-order transition, shows a maximum magnetic entropy change of about 6.86 J/kgK and the relative cooling power (RCP) value of 386 J/kg at 298 K under a field change of 5T. Based on a phenomenological model, the magnetocaloric properties obtained from temperature-dependent magnetization data are in good agreement with the experimental results. To give a better understanding of magnetic transition and the effective magnetic entropy change, we quantify the coupling of lattice energy and electronic energy contribution to the effective magnetic entropy change from a Landau theory plus Bean-Rodbell model. Interestingly, the coupling of lattice energy and electronic energy presents a positive value of up to 4.5% of the effective magnetic entropy change, producing a deleterious impact on the effective magnetic entropy change. The results suggest that the Mn5Ge2.9Ag0.1system could be a very attractive material for room-temperature magnetic refrigeration applications.
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影响因子:
2.7
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C.L. Zhang;Y.G. Nie;H.F. Shi;E.J. Ye;Z.D. Han;D.H. Wang
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影响因子:
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16.9
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影响因子:
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