Martensitic transformation and magnetic properties in Heusler CoNiGa magnetic shape memory alloys

被引：56

作者：

Liu, J ^{[1
]}

Zheng, HX ^{[1
]}

Xia, MX ^{[1
]}

Huang, YL ^{[1
]}

Li, JG ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200030, Peoples R China

来源：

SCRIPTA MATERIALIA | 2005年 / 52卷 / 09期

关键词：

magnetic shape memory alloy; martensitic transformation; magnetic properties;

D O I：

10.1016/j.scriptamat.2004.12.034

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A series of samples of CoNiGa were studied with regard to their structure, martensitic transformation, magnetic properties, and thermally induced strains. Optical microscopy shows that a single martensite phase exists in the alloys, which accords with the X-ray diffraction result. The martensitic transformation temperature (higher than 350 K) decreases with increasing Co content when keeping the ratio of Ni/Ga constant; this was attributed to the size factor. The saturation magnetization, about 30 emu/g, increases with increasing Co content. In addition, a complete shape recovery with a phase transformation strain of 1% appears in the oriented martensitic variants. (C) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：935 / 938

页数：4

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