Origin of unusual properties in the ferromagnetic Heusler alloy Ni–Mn–Sn: A first-principles investigation

The martensitic phase transformation temperatures in the Ni–Mn–Sn Heusler alloys increase with the number of valence electrons per atom; however, when Mn atoms are substituted by Fe, Co or Cu atoms, the systems show anomalous behaviors. In addition, large magnetization changes are observed in these...

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Bibliographic Details
Published in:Scripta materialia 2014-10, Vol.89, p.33-36
Main Authors: Wang, Xu, Shang, Jia-Xiang, Wang, Fu-He, Jiang, Cheng-Bao, Xu, Hui-Bin
Format: Article
Language:English
Subjects:
Alloys
Atomic properties
Ferromagnetic shape memory
First-principles calculation
Heusler alloy
Heusler alloys
Magnetic properties
Magnetic structure
Martensitic phase transformation
Mathematical analysis
Nickel base alloys
Phase transformations
Transition metals
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Summary:The martensitic phase transformation temperatures in the Ni–Mn–Sn Heusler alloys increase with the number of valence electrons per atom; however, when Mn atoms are substituted by Fe, Co or Cu atoms, the systems show anomalous behaviors. In addition, large magnetization changes are observed in these alloys. To understand the unusual properties, the phase transitions in Ni–Mn(Z)–Sn (Z=3d transition metals) are studied using first-principles calculations. It is found that the changes in the magnetic configuration are responsible for the unusual properties observed.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2014.06.027