Martensitic transformation in Heusler alloy Mn₂PtIn: Theoretical and experimental investigation

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• 作者：Hongzhi Luo ; Pengzhong Jia ; Guodong Liu ; Fanbin Meng ; Heyan Liu ; Enke Liu ; Wenhong Wang ; Guangheng Wu
• 关键词：A. Ferromagnetic shape memory alloys ; A. Heusler alloys ; C. XRD ; D. Electronic structure.
• 刊名：Solid State Communications
• 出版年：2013
• 出版时间：September, 2013
• 年：2013
• 卷：170
• 期：Complete
• 页码：44-47
• 全文大小：669 K

文摘

The martensitic transformation in Heusler alloy Mn₂PtIn has been investigated by first-principles calculations and experimental studies. Theoretical calculation reveals that, in Mn₂PtIn, a transition from cubic structure to tetragonal one is favorable in energy. This has been confirmed by following experimental studies. At room temperature, Mn₂PtIn crystallizes in a tetragonal structure of the space group I-4m2. And a transition from tetragonal to cubic Heusler phase occurs at 638 K. Mn₂PtIn is a ferrimagnet in both austenitic and martensitic phases. Its magnetic properties are mainly determined by the antiparallel aligned Mn spin moments. These findings can greatly enlarge our scope of discovering new FSMAs in Heusler alloys containing 4d and 5d elements.