The emerging field of spintronics leverages electron spin and magnetization. This could enhance the storage capacity of computer hard drives and potentially play an important role in quantum computing’s future. Superconductor-ferromagnet (SF) structures are widely regarded as the building blocks of this superconducting spintronic technology. More conventional spintronic devices typically require large currents, so researchers are investigating the viability of low-resistance superconductors. Their new results could answer longstanding questions about how SF structures interact.