Co-vacancy induced magneto-structural transformation in Co and Ge bidirectional-regulation MnCoGe systems

Co-vacancy induced magneto-structural transformation in Co and Ge bidirectional-regulation MnCoGe systems
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Co 和 Ge 双向调节 MnCoGe 系统中的共空位引起的磁结构转变

DOI:
10.1016/j.jallcom.2019.153061
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发表时间:
2020-04
影响因子:
6.2
通讯作者:
Zhenchen Zhong
Zhenchen Zhong
中科院分区:
材料科学2区
文献类型:
--
作者:
Ying Song;Shengcan Ma;Feng Yang;Zhishuo Zhang;Yuxi Zhang;Hai Zeng;Sajjad Ur Rehman;Guofang Feng;Xiaohua Luo;Changcai Chen;Zhansheng Lu;Zhenchen Zhong

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将MnCoGe合金的结构转变调整到异方晶相和正交晶相的居里温度之间的温度区域,可以获得具有较大磁热效应的一致的磁结构转变。然而,在MnCoGe基合金中控制和实现磁结构耦合的研究通常集中在三种元素之间的单向变化。本文报道了Co和Ge双向调控MnCoGe合金的一级磁结构耦合相变。结果表明,MnCo_(1-x)Ge_(1 + x)和MnCo_(1 + y)Ge_(1-y)体系在室温附近都具有较大的磁热效应。在这两个系统的磁结构耦合的统一起源进行了探讨。
Tuning the structural transformation into the temperature region between the Curie temperatures of Hexagonal and Orthorhombic phases can acquire coincident magneto-structural transformation with a large magnetocaloric effect in MnCoGe alloy. However, the investigations about controlling and achieving magneto-structural coupling in MnCoGe-based alloys usually focus on the unidirectional change among the three elements. Here, we report the first-order magneto-structural coupled transformation in Co and Ge bidirectional-regulation MnCoGe alloys. Resultantly, large magnetocaloric effect is obtained around room temperature in both MnCo1-xGe1+xand MnCo1+yGe1-ysystems. The uniform origins of magneto-structural coupling in both systems are explored.
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