  Using atomistic Monte Carlo simulations, we investigated the impact of the
interface on the structural properties of iron and copper (Fe/Cu) magnetic
multilayers grown by Vorono\"i diagram. Interest in magnetic multilayers has
recently emerged as they are shown to be promising candidates for magnetic
storage media, magneto-resistive sensors, and personalized medical treatment.
As these artificial materials show large differences in properties compared to
conventional ones, many experimental and theoretical works have been dedicated
on shedding light on these differences and tremendous results have emerged.
However, little is known how the interfaces influence the structure of the
layers around them. By a numerical approach, we show that the structure of each
layer depends on its thickness and the interface morphology. The Fe and Cu
layers can adopt either the body-centered-cubic (bcc) or face-centered-cubic
(fcc) structure, while the interface can assume amorphous, bcc, fcc, or a
mixture of bcc and fcc structures depending on the layer thicknesses. These
results are in good agreement with the experiments. They could be helpful in
understanding effects such as giant magneto-resistance from the structural
viewpoint.
