Magnetic-field-induced shape recovery by reverse phase transformation

被引：1644

作者：

Kainuma, R

Imano, Y

Ito, W

Sutou, Y

Morito, H

Okamoto, S

Kitakami, O

Oikawa, K

Fujita, A

Kanomata, T

Ishida, K

机构：

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

[2] Tohoku Univ, Biomed Engn Res Org, Sendai, Miyagi 9808575, Japan

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

[4] Tohoku Gakuin Univ, Fac Engn, Tagajo, Miyagi 9808537, Japan

来源：

NATURE | 2006年 / 439卷 / 7079期

基金：

日本科学技术振兴机构;

关键词：

D O I：

10.1038/nature04493

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Large magnetic-field-induced strains(1) have been observed in Heusler alloys with a body-centred cubic ordered structure and have been explained by the rearrangement of martensite structural variants due to an external magnetic field(1-3). These materials have attracted considerable attention as potential magnetic actuator materials. Here we report the magnetic-field-induced shape recovery of a compressively deformed NiCoMnIn alloy. Stresses of over 100 MPa are generated in the material on the application of a magnetic field of 70 kOe; such stress levels are approximately 50 times larger than that generated in a previous ferromagnetic shape-memory alloy(4). We observed 3 per cent deformation and almost full recovery of the original shape of the alloy. We attribute this deformation behaviour to a reverse transformation from the antiferromagnetic (or paramagnetic) martensitic to the ferromagnetic parent phase at 298 K in the Ni45Co5Mn36.7In13.3 single crystal.

引用

页码：957 / 960

页数：4

共 24 条

[1] Shape memory effect due to magnetic field-induced thermoelastic martensitic transformation in polycrystalline Ni-Mn-Fe-Ga alloy [J].