Hysteresis of the phase diagram in the ferromagnet-superconductor hybrids

After the 100th year anniversary of the discovery of superconductivity, the field continues to develop in several directions; including ferromagnet-superconductor hybrids.^1-5 Magnetic and superconducting states are perhaps the most extreme example of mutually exclusive states. However, when combined at the nanoscale, they show new exciting properties and enhanced superconductivity. Here we report the measurements and simulation of the phase diagram of a thin superconducting film with an array of magnetic nanorods (MNR) embedded in the film. Results of the experimental measurements of the phase diagram of a PbBi superconducting film with embedded arrays of Ni nanorods are reported and compared with the simulated phase diagrams.