An electron hologram is an interference pattern between a scattered object wave, transmitted through the object and a reference wave passing (ideally) through the field-free vacuum besides the object. The holograms are numerically reconstructed and give access to the phase and amplitude variations of the transmitted electron wave with respect to an unperturbed reference wave. This hologram and colored reconstructed phase map are of a Co/Cu nanostructured nanowire. The nanowire is 6 µm long with a diameter of approximately 80 nm. The cobalt grains are 1.2 µm long and separated by 0.3 µm long copper spacer. The phase map reveals the magnetic lines of force of the magnetic leakage field. A phase difference of 2pi; corresponds in this phase map to a change in the color from white over red, green and blue to black.

 

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