Superconductivity in the ferromagnetic phase of polycrystalline HoMo6S8 films

Films of HoMo6S8 have been found to exhibit zero resistance at low temperatures in the ferromagnetic phase. Measurements of the temperature and magnetic field dependences of the electrical resistance, critical field, magnetization, and critical current have been carried out. Zero resistance in the ferromagnetic phase is a consequence of the superconductivity on either domain walls within crystallites or domain walls associated with grain boundaries. In either instance there must be significant supercurrent flow through ferromagnetic material.