Controlling magnetism through Ising superconductivity in magnetic van der Waals heterostructures

Van der Waals heterostructures have risen as a tunable platform to combine different electronic orders, due to the flexibility in stacking different materials with competing symmetry broken states. Among them, van der Waals ferromagnets such as ${\mathrm{CrI}}₃$, ${\mathrm{CrBr}}₃$, or ${\mathrm{CrCl}}₃$ and superconductors as ${\mathrm{NbSe}}₂$ provide a natural platform to engineer novel phenomena at ferromagnet-superconductor interfaces. In particular, ${\mathrm{NbSe}}₂$ is well known for hosting strong spin-orbit coupling effects that influence the properties of the superconducting state. Here we put forward a ferromagnet/${\mathrm{NbSe}}₂$/ferromagnet heterostructure where the interplay between Ising superconductivity in ${\mathrm{NbSe}}₂$ and magnetism controls the magnetic alignment of the heterostructure. In particular, we show that the interplay between spin-orbit coupling and superconductivity provides a new mechanism to control magnetic ordering in van der Waals materials. We show that this coupling allows creating heterostructures featuring a magnetic phase transition from in-plane to out-of-plane associated with the onset of superconductivity. Our results show how a hybrid van der Waals ferromagnet/superconductor heterostructure can be used as a tunable materials platform for superconducting spin-orbitronics.