Ferromagnets are materials that become magnetized and remain so while they are exposed to an external magnetic field. In these materials, electric currents typically induce a so-called transverse Hall voltage (i.e., a voltage resulting from the deflection of electrons), which is proportional to their internal magnetization.
Click here for original story, A spontaneous topological Hall effect driven by a non-coplanar antiferromagnetic order in van der Waals materials
Source: Phys.org