Superconducting currents offer a promising route toward low-dissipation manipulation of magnetic textures, with potential applications in cryogenic memory and superconducting electronics. In this talk, I will discuss a mechanism for controlling magnetic domain walls using supercurrents in a superconductor/ferromagnetic-insulator (SC/FI) bilayer. The key ingredient is the interplay between superconducting diode effect and magnetism. In the first part I will discuss the superconducting diode effect, and explain why it appears in SC/FI bilayers, making the connection with the (inverse) spin-galvanic effect, which converts spin into currents (and vice versa). In the second part of the talk I will discuss how the spin generated by the inverse spin-galvanic effect can be used to drive domain walls in the ferromagnetic insulator. The resulting domain wall motion yields a local voltage in the superconductor that can be used as a probe of the effect. The resulting domain wall motion lays a foundation for low dissipation magnetic memory devices.
Kokkeler, T., Tokatly, I., & Bergeret, F. S. (2024). Quantum transport theory for unconventional magnets: Interplay of altermagnetism and p-wave magnetism with superconductivity. SciPostPhys.16.2.055.
Kokkeler, T., Ojajärvi, R., Bergeret, F. S., & Heikkilä, T. T. (2026). Controlling magnetic domain walls with supercurrents. arXiv preprint arXiv:2606.19078.