Giant reversible magnetocaloric effect in ErMn2Si2 compound with a second order magnetic phase transition
Giant reversible magnetocaloric effect in ErMn2Si2 compound with a second order magnetic phase transition
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具有二阶磁相变的 ErMn2Si2 化合物中的巨可逆磁热效应
DOI：
10.1063/1.4704155
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发表时间：
2012-04-09
影响因子：
4
通讯作者：
NamiKi, Takahiro
中科院分区：
文献类型：
--
作者：
Li, Lingwei;Nishimura, Katsuhiko;NamiKi, Takahiro
通过磁化强度和热容测量研究了三元金属间化合物ErMn2Si2 的磁性能和磁热效应(MCE)。观测到巨大的可逆MCE，伴随着~4.5 K从顺磁到铁磁的二阶磁相变。在5 T的场变化下，磁熵变（−ΔSMmax）的最大值为25.2 J kg−1 K−1，没有热和场磁滞损耗，相应的绝热温度变化（ΔTadmax）最大值为12.9 K。特别是，对于2 T的低场变化，-ΔSMmax和ΔTadmax的值分别达到20.0 J kg−1 K−1和5.4 K。目前的结果表明，ErMn2Si2 化合物是低温磁制冷的有吸引力的候选者。
The magnetic properties and magnetocaloric effect (MCE) in the ternary intermetallic compound ErMn2Si2 have been studied by magnetization and heat capacity measurements. A giant reversible MCE has been observed, accompanied by a second order magnetic phase transition from paramagnetic to ferromagnetic at ∼4.5 K. Under a field change of 5 T, the maximum value of magnetic entropy change (−ΔSMmax) is 25.2 J kg−1 K−1 with no thermal and field hysteresis loss, and the corresponding maximum value of adiabatic temperature change (ΔTadmax) is 12.9 K. Particularly, the values of −ΔSMmax and ΔTadmax reached 20.0 J kg−1 K−1 and 5.4 K for a low field change of 2 T, respectively. The present results indicate that the ErMn2Si2 compound is an attractive candidate for low temperature magnetic refrigeration.