Influence of Fe-doping on magnetic structure and martensitic transformation in Ni-Mn-In and Ni-Mn-Sb alloys

被引：10

作者：

Ma, Yuexing ^{[1
]}

Hao, Hongyue ^{[1
]}

Liu, Xiaotong ^{[1
]}

Luo, Hongzhi ^{[1
]}

Meng, Fanbin ^{[1
]}

Liu, Heyan ^{[1
]}

机构：

[1] Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China

来源：

INTERMETALLICS | 2018年 / 93卷

基金：

中国国家自然科学基金;

关键词：

Magnetic alloys; Magnetic properties; Electronic structure; Martensitic transformation; Ab-initio calculations; SHAPE-MEMORY ALLOY; ELECTRONIC-STRUCTURE;

D O I：

10.1016/j.intermet.2017.10.003

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Influence of Fe substitution for Ni on the magnetic properties and martensitic transformation was investigated theoretically in Heusler alloys Ni(2)Mn(1.5)Z(0.5) (Z = In, Sb). Fe-doping does not change the general magnetic structure of Ni(2)Mn(1.5)Z(0.5). In both Ni2Mn1.5In0.5 and Ni1.75Mn1.5In0.5 the austenitic phase is ferromagnetic and martensitic phase is antiferromagnetic, which leads to the large Delta M observed experimentally. But in Ni2Mn1.5Sb0.5 and Ni1.75Fe0.25Mn1.5Sb0.5, the antiferromagnetic state is stable in both austenite and martensite. This difference is mainly related to the different atomic radii of In and Sb, which change the distance between Mn (B) and Mn (D). Parallel or antiparallel coupled Mn moments determine the magnetic properties of these alloys. But the partial moment of Fe is large and its direction reverses after martensitic transformation, which makes it a possible way to adjust the magnetic properties of MSMAs. Calculation also suggests that the substitution of Fe for Ni can lower the martensitic transition driving force and lead to the decrease of phase transition temperature. These results agree well with preceding experimental results and make reasonable explanation for them.

引用

页码：263 / 268

页数：6

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