Point contact spectroscopy on the ferromagnetic superconductor HoMo6S8

Point contact spectroscopy performed in single crystals of the ferromagnetic superconductor HoMo6S8, has been used to study the evolution in temperature and competition of the two order parameters. At temperatures of the order of the superconducting transition, we observe the onset of a structure in the dV/dI versus V characteristics that may be related to the development of the superconducting energy gap. At temperatures close to the ferromagnetic transitions, we also observe the growth of another structure in the dV/dI versus V characteristics that may be correlated with the development of the magnetic order parameter. This feature in the dV/dI versus V characteristic develops in a direction opposite to the structure associated with the superconducting energy gap. (orig.)