Biswas, C. ; Rawat, R. ; Barman, S. R. (2005) Large negative magnetoresistance in a ferromagnetic shape memory alloy: Ni2+xMn1-xGa Applied Physics Letters, 86 (20). 202508_1-202508_3. ISSN 0003-6951
Full text not available from this repository.
Official URL: http://apl.aip.org/resource/1/applab/v86/i20/p2025...
Related URL: http://dx.doi.org/10.1063/1.1925757
Abstract
5% negative magnetoresistance (MR) at room temperature has been observed in bulk Ni2+xMn1-xGa. This indicates the possibility of using Ni2+xMn1-xGa as magnetic sensors. We have measured MR in the ferromagnetic state for different compositions (x = 0-0.2) in the austenitic, premartensitic, and martensitic phases. MR is found to increase with x. While MR for x = 0 varies almost linearly in the austenitic and premartensitic phases, in the martensitic phase it shows a cusplike shape. This has been explained by the changes in twin and domain structures in the martensitic phase. In the austenitic phase, which does not have twin structure, MR agrees with theory based on s-d scattering model.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Institute of Physics. |
| Keywords: | Nickel Alloys; Manganese Alloys; Gallium Alloys; Ferromagnetic Materials; Shape Memory Effects; Martensitic Transformations; Magnetic Sensors; Magnetic Domains; Enhanced Magnetoresistance |
| ID Code: | 93242 |
| Deposited On: | 14 Jun 2012 12:48 |
| Last Modified: | 14 Jun 2012 12:48 |
Repository Staff Only: item control page
