Giant magnetic-field-induced strains in Heusler alloy NiMnGa with modified composition

被引：189
|
作者：
Wu, GH
Yu, CH
Meng, LQ
Chen, JL
Yang, FM
Qi, SR
Zhan, WS
Wang, Z
Zheng, YF
Zhao, LC
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：
APPLIED PHYSICS LETTERS | 1999年 / 75卷 / 19期
关键词：
D O I：
10.1063/1.125211
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A giant magnetic-field-induced strain (MFIS) of -3100 ppm has been obtained in Heusler alloy Ni52Mn22.2Ga25.8 single crystal in the [001] direction at a temperature from 23 to 31 degrees C. This MFIS reaches saturation in an applied field about 6 kOe, and exhibits the same amplitude with an opposite sign while the field is perpendicular to the samples. According to a previous model, this MFIS associates with the twin boundary motion. The martensitic self-strain has been found to be 2%, implying a preferential orientation of martensite variants. Results related to the magnetic properties are discussed. (C) 1999 American Institute of Physics. [S0003-6951(99)02545-0].
引用
收藏
页码：2990 / 2992
页数：3
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