Magnetostructural transition and magnetocaloric effect in MnCoGe-NiCoGe system
Magnetostructural transition and magnetocaloric effect in MnCoGe-NiCoGe system
复制标题
MnCoGe-NiCoGe体系中的磁结构转变和磁热效应
DOI：
10.1016/j.jallcom.2015.03.118
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发表时间：
2015
影响因子：
6.2
通讯作者：
Wang D. H.
中科院分区：
文献类型：
--
作者：
Zhang C. L.;Shi H. F.;Ye E. J.;Nie Y. G.;Han Z. D.;Wang D. H.
研究了MnCoGe-NiCoGe系统的磁结构转变和磁热效应。NiCoGe与母体化合物MnCoGe的化学合金化稳定了相对于低温正交结构的高温六方结构，并保持了它们的居里温度几乎恒定，建立了一个磁性转变和结构转变重合的居里温度窗口。结果是，在铁磁状态和顺磁状态之间发生磁结构转变，在室温附近磁化强度急剧跳跃。在MnCoGe-NiCoGe系统中观察到了具有可调相变温度的大磁热效应。
Magnetostructural transition and magnetocaloric effect were investigated for MnCoGe–NiCoGe system. Chemically alloying NiCoGe with the parent compound MnCoGe stabilizes the high-temperature hexagonal structure relative to the low-temperature orthorhombic structure and keeps their Curie temperatures nearly constants, establishing a Curie temperature window in which the magnetic and structural transitions coincide. As a result, magnetostructural transitions occur between ferromagnetic and paramagnetic states with sharp jumps in magnetization around room temperature. Large magnetocaloric effects with tunable phase transition temperatures were observed in the MnCoGe–NiCoGe system.