Superconductivity in nickelates can be killed by a magnetic field and then miraculously reappear when the magnetic force gets even stronger.

Field-reentrant superconductivity allows a material to regain its ability to conduct electricity without resistance at extreme magnetic intensities. Most superconductors are delicate and lose their properties the moment a magnet is brought near them. This research demonstrates a chemical way to manipulate the rivalry between superconducting states and magnetic fields. This discovery proves that the 'death' of superconductivity is not always final and can be reversed with more power. This phenomenon provides a new pathway for creating magnets that can handle massive electrical loads without failing. It could lead to a new generation of ultra-powerful magnetic medical imaging and fusion reactors.