Magnetic and thermal properties of Ni-Mn-Ga shape memory alloy with Martensitic transition near room temperature

被引：19
|
作者：
Zhu, FQ [1 ]
Yang, FY
Chien, CL
Ritchie, L
Xiao, G
Wu, GH
机构：
[1] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA
[2] Brown Univ, Dept Phys, Providence, RI 02912 USA
[3] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2005年 / 288卷
基金：
美国国家科学基金会;
关键词：
shape memory alloy; Heusler alloy; spontaneous magnetization; Martensitic transition;
D O I：
10.1016/j.jmmm.2004.08.025
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have studied the magnetic properties of an off-stoichiometric Heusler shape memory alloy Ni51.9Mn23.2Ga24.9 with near room temperature martensitic transition at 306 K. The temperature dependence of magnetization revealed a thermal hysteresis and a similar to10% decrease in spontaneous magnetization across the martensitic transition. In-situ X-ray diffraction measurements at different temperatures revealed a negative shape strain of 4.8%. Heat absorptions measurements indicated that the inartensitic structural transition may take place in Multiple steps. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：79 / 83
页数：5
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