Figure 2
From: Giant magnetoresistance in lateral metallic nanostructures for spintronic applications
(a) SEM images of several CoFe/Al/CoFe GMR nanostructures, on which the resistance is measured using a two probes measurement configuration. The non-ferromagnetic part in-between the ferromagnetic electrodes 1 and 2 are rectangles of various widths, acting similarly to a spacer in a classical CPP GMR stack. For all devices, the thicknesses of the layers, the areas of contacts and the distances between electrodes CoFe 1 and 2 are kept identical. (b) Evolution of the spin signal amplitude as a function of the width of the rectangular spacer. Each blue dot corresponds to a single device measured. The red triangles corresponds to the results of 3D simulations done using a finite element method. Inset: example of spin signal measured in the two probes configuration, for a device with a 350 nm wide spacer.
