| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1627419 | Journal of Alloys and Compounds | 2006 | 4 Pages |
Abstract
Specular spin valves show enhanced giant magnetoresistance due to electron specular reflection at the ferromagnetic (FM)/nano-oxide layer (NOL) interfaces. The two NOLs are formed by the partial oxidation of the FM free and pinned layers. Here we study the thermopower of specular MnIr/CoFe/NOL/CoFe/Cu/CoFe/NOL spin valves (300-10âK). We show that the oxides making the NOL order antiferromagnetically at TNâ150 âK. This magnetic ordering induces a large change in the magneto-thermopower (ÎS /S under a magnetic field) as T decreases below TN, and also on the temperature derivative of the electrical resistivity. At low temperatures a quadratic dependence is observed in S(T), likely due to excitation of spin waves.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
A.M. Pereira, J.M. Teixeira, F. Carpinteiro, J.P. Araújo, R. Pinto, M.E. Braga, J.B. Sousa, A. Veloso, P.P. Freitas,