The investigation of magnetic skyrmions in thin film multilayers holds promise for enhancing spintronic technologies due to their stability and potential for low-power applications. This thesis explores the magnetic properties and behaviors of Pt/Co/Ta and Pt/Co/W asymmetric multilayers, focusing on the effect of different heavy metals and the interfacial Dzyaloshinskii-Moriya interaction (IDMI) on the formation and the stability of skyrmions. The study employs consistent layer thicknesses and repetitions to specifically analyze the impact of the heavy metal layers. The Pt/Co/W multilayer exhibits perpendicular magnetic anisotropy (PMA) with a saturation field of 800 Oe. Initially, a maze-like domain structure is present at zero field, which transitions into a lower-density labyrinth structure at 250 Oe, accompanied by isolated skyrmions. Increasing the magnetic field to 500 Oe leads to the formation of short, straight wire-like structures along with magnetic skyrmions. Further increasing the field to 600 Oe results in a higher density of skyrmions, with the disappearance of domain structures. Conversely, the Pt/Co/Ta multilayer shows partial PMA with a saturation field of 700 Oe. Labyrinth domains are observed at zero field, with a combination of thin maze-like domains and low-density skyrmions appearing at 200 Oe. At higher fields nearing the saturation point, skyrmions and other topological structures are observed. These results underscore the significant role of the choice of heavy metal and IDMI in shaping the magnetic characteristics and skyrmion behavior in these multilayers. The insights gained from this study contribute to the development and optimization of magnetic thin films for advanced spintronic devices.