Magnetic properties and phase diagram of Ni50Mn50-xGax ferromagnetic shape memory alloys

被引：50

作者：

Xu, Xiao ^{[1
]}

Nagasako, Makoto ^{[1
]}

Ito, Wataru ^{[2
]}

Umetsu, Rie Y. ^{[3
]}

Kanomata, Takeshi ^{[1
,4
]}

Kainuma, Ryosuke ^{[1
]}

机构：

[1] Tohoku Univ, Grad Sch Engn, Dept Mat Sci, Sendai, Miyagi 9808579, Japan

[2] Sendai Natl Coll Technol, Dept Mat & Environm Engn, Natori, Miyagi 9811239, Japan

[3] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[4] Tohoku Gakuin Univ, Res Inst Engn & Technol, Tagajo, Miyagi 9858537, Japan

来源：

ACTA MATERIALIA | 2013年 / 61卷 / 18期

基金：

日本学术振兴会;

关键词：

Ferromagnetic shape memory alloys; Martensitic transformation; Ni2MnGa; Phase diagram; Saturation magnetization; NI-MN-GA; FIELD-INDUCED STRAINS; HEUSLER ALLOYS; MARTENSITIC PHASE; SINGLE-CRYSTALS; NI2MNGA; TRANSFORMATIONS; SYSTEM; TRANSITIONS; DEPENDENCE;

D O I：

10.1016/j.actamat.2013.07.033

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present the magnetic properties and the magnetic phase diagram of Ni50Mn50-xGax ferromagnetic shape memory alloys across a wide concentration range. Martensitic transformation, intermediate transformation, B2 L21 order disorder transformation, Neel and Curie temperatures are determined for the prepared samples. The martensitic transformation temperature decreases with increasing Ga concentration and bends two times when crossing the Curie temperature and the intermediate-phase transformation temperature. Spontaneous magnetization and its composition dependence were also investigated. Composition dependence of the transformation temperatures and the spontaneous magnetization in the martensite phase of NNi50Mn50-xGax are compared with those of Ni50Mn50-xGaxIn, and Ni50Mn50-xGax, revealing a similarity in the NiMn-based alloy systems. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：6712 / 6723

页数：12

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