the family of chromium trihalides represents one of the most promising classes of van der Waals (vdW) magnetic monolayer materials. Their integration into vdW heterostructures is expected to yield a rich variety of exotic effects. For example, combining a magnetic insulator such as a chromium trihalide with a transition metal dichalcogenide (TMD) may give rise to new and exciting physics, including the emergence of topological superconductivity, as recently suggested in CrBr₃/NbSe₂ heterostructures. The stacking of magnetic insulators and superconducting vdW materials remains highly appealing, owing to its exceptional compatibility with nanoelectronic device architectures. In this internship, we aim to further pursue this strategy. Specifically, we will investigate the growth of several magnetic insulators (FeCl₂, NiBr₂, CrCl₂, VCl₃) on NbSe₂, targeting the formation of either two-dimensional islands or one-dimensional nanoribbons. Spin-polarized scanning tunneling microscopy (SP-STM) will be employed to probe their magnetic ground states, and low-temperature scanning tunneling spectroscopy (STS) will be performed to search for potential signatures of topological superconductivity in these heterostructures.