Effect of off-stoichiometry in Heusler alloy thin films on spin-dependent tunnelin...
| Full text | |
| Author(s): |
Montanher, D. Z.
[1]
;
Pereira, J. R. D.
[1]
;
Cotica, L. F.
[1]
;
Gotardo, R. A. M.
[2]
;
Viana, D. S. F.
[3]
;
Garcia, D.
[3]
;
Eiras, J. A.
[3]
;
Santos, I. A.
[1]
Total Authors: 8
|
| Affiliation: | [1] Univ Estadual Maringa, Dept Phys, BR-87020900 Maringa, Parana - Brazil
[2] Technol Fed Univ Parana, BR-86300000 Cornelio Procopio, PR - Brazil
[3] Univ Fed Sao Carlos, Dept Phys, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Journal of Applied Physics; v. 116, n. 11 SEP 21 2014. |
| Web of Science Citations: | 0 |
| Abstract | |
Martensitic polycrystalline Ni48.8Mn31.4Ga19.8 Heusler alloys, with a stacking period of 14 atomic planes at room temperature, were innovatively processed by combining high-energy ball milling and powder metallurgy. Bulk samples were mechanically coupled to a piezoelectric material in a parallel configuration, and the mechanical deformation of the studied system due to the twin's variant motion was investigated under overlapped static and oscillating magnetic fields. A reversible and high mechanical deformation is observed when the frequency of the oscillating magnetic field is tuned with the natural vibration frequency of this system. In this condition, a linear deformation as a function of the static magnetic field amplitude occurs in the +/- 4 kOe range, and a mechanical deformation of 2% at 10 kOe is observed. (C) 2014 AIP Publishing LLC. (AU) | |
| FAPESP's process: | 08/04025-0 - Nanostructured multifunctional multiferroic materials: synthesis, properties, phenomenology and applications |
| Grantee: | José Antonio Eiras |
| Support type: | Research Projects - Thematic Grants |