Spectroscopic studies of magnetic ordering in two-dimensional trihalides and chromium-based compounds

Since the discovery of layer-dependent ferromagnetism in chromium triiodide(CrI₃), the two-dimensional(2-D) crystals with intrinsic magnetism persisting even into monolayer attract widespread concern. This kind of 2-D magnets provide us a totally new platform for further development of spintronics, magnetoelectronics etc. Even though the details of the magnetic coupling between layers have not been fully understood, such ferromagnetism in CrI₃ give us hint that other 2-D trihalides and chromium-based compounds may also show remarkable magnetic properties down to thin layers. Here we will present our work on looking for new 2-D magnets and the understanding of the magnetic ordering in these materials.