Magnetic properties and structural phase transformations of NiMnGa alloys

被引：33

作者：

Wang, WH ^{[1
]}

Hu, FX

Chen, JL

Li, YX

Wang, Z

Gao, ZY

Zheng, YF

Zhao, LC

Wu, GH

Zan, WS

机构：

[1] Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, Beijing 100080, Peoples R China

[2] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2001年 / 37卷 / 04期

基金：

中国国家自然科学基金;

关键词：

magnetic-field-induced strain; magnetic properties; phase transformation;

D O I：

10.1109/20.951284

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The magnetic properties and structural phase transformations of Heusler alloys M2+xMn1-xGa and Ni2-xMn1+x/2Ga1+x/2 were investigated. It was found that the martensitic transformation temperature increases and the Curie temperature decreases with decreasing Mn concentration in the Ni2+xMn1-xGa system, but the magnetic properties decrease faster than those do in the Ni2-xMn1+x/2Ga1+x/2 system. It suggests that the influence of the conduction electron concentration and the distance between Mn atoms on the Curie temperature is stronger than the magnetic dilution effect. The martensitic transformation temperature shows a peak value at x = 0.06 in the Ni2-xMn1+x/2Ga1+x/2 system. A large stress-free magnetic-field-induced strain (MFIS) of 1.8% has been obtained at room temperature in a single crystal sample with the composition in the first system.

引用

页码：2715 / 2717

页数：3

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