Isomagnetic martensitic transformation in Ni2MnGa alloys
| Autor: | Kari Ullakko, N.I Glavatska |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Materials science
Field (physics) Condensed matter physics Alloy engineering.material Condensed Matter Physics Electronic Optical and Magnetic Materials Magnetic field Magnetization Nuclear magnetic resonance Magnetic shape-memory alloy Martensite Diffusionless transformation engineering Texture (crystalline) |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 218:256-260 |
| ISSN: | 0304-8853 |
| DOI: | 10.1016/s0304-8853(00)00360-7 |
| Popis: | An effect of the magnetic field on the martensitic transformation and the change in the martensitic variants of the alloy Ni 2 MnGa containing (at%) 49.6 Ni, 28.4 Mn and 22.0 Ga was studied using X-ray diffraction. It is shown that the applied magnetic field induces martensitic transformation and initiates the development of a preferential martensitic variant. These processes are extended in time, which resembles the isothermal martensitic transformation observed in iron-based alloys. The kinetics of transformation under magnetic field and the after-effect when the field is taken out are studied. The kinetics is shown to depend on the orientation of the applied field in relation to the direction of easy magnetization 1 0 0 . The strain induced by the magnetic field is measured and the time dependence of the strain is found in consistence with the results of X-ray diffraction study. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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