Controlling magnetism in layered metal halides by doping*

van der Waals magnets such as chromium triiodide show thickness dependent magnetic properties which can be further controlled by electrostatic gating. Engineering their intrinsic magnetism via compositional and structural modification remains largely unexplored. I will present our recent efforts on doping layered metal halides, including the characterization of bulk crystals and exfoliated flakes down to their 2D limit.