Realization of magnetostructural coupling by modifying structural transitions in MnNiSi-CoNiGe system with a wide Curie-temperature window.
Realization of magnetostructural coupling by modifying structural transitions in MnNiSi-CoNiGe system with a wide Curie-temperature window.
复制标题
通过改变具有宽居里温度窗口的MnNiSi-CoNiGe系统中的结构转变来实现磁结构耦合
DOI：
10.1038/srep23386
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发表时间：
2016-03-16
影响因子：
4.6
通讯作者：
Xu F
中科院分区：
文献类型：
--
作者：
Liu J;Gong Y;Xu G;Peng G;Shah IA;Ul Hassan N;Xu F
结构转变和磁转变之间的磁结构耦合导致相变合金的磁多功能性。由于多功能应用的需求不断增加，寻找在大工作温度范围内具有可调谐磁结构转变的新材料非常重要。在这项工作中，我们证明，通过将 MnNiSi 与 CoNiGe 进行化学合金化，MnNiSi (1200 K) 的结构转变温度显着降低了近 1000 K。在 425 至 125 K 的宽温度窗口内实现了顺磁六方相和铁磁正交相之间的可调磁结构转变(MnNiSi)1−x(CoNiGe)x 系统。磁场引起的磁结构转变伴随着高性能磁热效应，证明MnNiSi-CoNiGe系统是磁冷却制冷剂的有前途的候选者。
The magnetostructural coupling between structural and magnetic transitions leads to magneto-multifunctionalities of phase-transition alloys. Due to the increasing demands of multifunctional applications, to search for the new materials with tunable magnetostructural transformations in a large operating temperature range is important. In this work, we demonstrate that by chemically alloying MnNiSi with CoNiGe, the structural transformation temperature of MnNiSi (1200 K) is remarkably decreased by almost 1000 K. A tunable magnetostructural transformation between the paramagnetic hexagonal and ferromagnetic orthorhombic phase over a wide temperature window from 425 to 125 K is realized in (MnNiSi)1−x(CoNiGe)x system. The magnetic-field-induced magnetostructural transformation is accompanied by the high-performance magnetocaloric effect, proving that MnNiSi-CoNiGe system is a promising candidate for magnetic cooling refrigerant.