The observation of topological non-trivial whirling spin textures such as magnetic skyrmions has opened new avenues to realize spintronic devices at the nanoscale, built on the tuning of nanometric particle-like objects. Néel magnetic skyrmions may exist in ultra-thin films with Perpendicular Magnetic Anisotropy (PMA), e.g. of the type Heavy Metal/Ferromagnet/Insulator (HM/FM/MOx), due to an antisymmetric exchange interaction called interfacial Dzyaloshinskii-Moriya Interaction (iDMI). The present thesis aims to perform a micromagnetic study of the magnetic stack of the type Pt/Co(0.9nm)/MgO, already intensively characterized by the past, both experimentally and by modelling, since the possibility to stabilize tunable chiral bubbles at room temperature.