Van der Waals materials are emerging as extremely versatile building blocks in many applications such as spintronics, superconductivity, nanoelectronics, optics, and may serve as tunable quantum simulators. These materials appear as extremely attractive for exploring new exotic physics due to their ability to be stacked with an infinite number of combinations that lead to unexpected physical properties. The recent discovery of ferromagnetic order down to the monolayer limit in van der Waals materials confers new opportunities to engineer hybrid quantum materials [1,2]. The family of chromium trihalide, is one of the most promising classes of two-dimensional magnetic materials. Their integration in a van der Waals heterostructure may form moiré patterns which are expected to lead to a wealth of exotic effects such as non-colinear magnetism. Indeed, we know from recent experimental and theoretical works that the moiré potential give rise to a periodic modulation of the magnetic interaction between the neigh-boring atoms which can lead to the emergence of exotic non-collinear spin texture such as spin spiral, vortex or skyrmion lattices. During the internship we will investigate moiré pattern in such Van der Waals magnets coupled to metallic and superconducting substrate. Using the atomically resolved spin polarized scanning tun-neling microscope, we will study the magnetic ground of the heterostructures and investigate how the moiré pattern influence this magnetic ground state.