Magnetism and structure of Fe- and Co-substituted Mn2NiSn

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:537

Article

Zhang, W. Y.^1,2  Skomski, R.^1,2  Valloppilly, S. R.^1,2  Khatri, Y.³  Kashyap, A.³  Sellmyer, D. J.^1,2 

[1] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA

[2] Univ Nebraska, Nebraska Ctr Mat & Nanosci, Lincoln, NE 68588 USA

[3] Indian Inst Technol Mandi, Mandi 175005, HP, India

关键词: Magnetic properties;    Heusler;    Structure;    Element substitution;   

DOI  :  10.1016/j.jmmm.2021.168157

来源: Elsevier

【 摘 要 】

Mn-containing Heuslers are important magnetic shape-memory alloys for fast and precise actuators in manufacturing, robotics, surgery, and other applications. Among the key requirements are a high magnetization and favorable thermal properties, especially a high Curie temperature. In this work, the effect of Fe and Co substitution on the structure and magnetism of Mn2NiSn alloys is investigated. The Heusler alloys have been produced by melt spinning and characterized by X-ray diffraction, magnetometry, and electron-transport measurements. It was found that Co substitution for Mn enhances the Curie temperature of Mn2NiSn and both Co and Fe substitution improve its magnetization. These improvements are accompanied by reduced thermal and magnetic hysteresis losses and by interesting structural changes, namely improved chemical order and site occupancies characteristic of quaternary (Y-ordered) Heuslers.

【 授权许可】

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