Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8151462 | Journal of Crystal Growth | 2014 | 5 Pages |
Abstract
Ni2FeGa single crystals have been grown in undercooling conditions provided by a glass-purification method. It has been found that trace amounts of γ phase embededin the single crystalline matrix preferentially orients in the ã1 0 0ã orientation along the growth direction. This γ phase generates directional residual stress and results in an anisotropic two-way shape memory effect. Large strains of â2.5% in the [0 0 1] and 1.5% in the [0 1 0] directions have been observed. This trace γ phase also improves the ductility of the material, thus the crystals could be plastically deformed at room temperature in the parent phase. The ã1 1 0ã and ã1 1 1ã orientations in Ni2FeGa alloy were identified as the easy and hard magnetization directions, respectively, in the parent phase by using low field M-T measurements.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
J.F. Qian, H.G. Zhang, J.L. Chen, W.H. Wang, G.H. Wu,