POINT-CONTACT SPECTROSCOPY ON THE FERROMAGNETIC SUPERCONDUCTOR HOMO6S8

Point contact spectroscopy performed in single crystals of the ferroma gnetic superconductor HoMo6S8, has been used to study the evolution in temperature and competition of the two order parameters. At temperatu res of the order of the superconducting transition, we observe the ons et of a structure in the dV/dI versus V characteristics that may be re lated to the development of the superconducting energy gap. A temperat ures close to the ferromagnetic transitions, we also observe the growt h of another structure in the dV/dI versus V characteristics that may be correlated with the development of the magnetic order parameter. Th is feature in the dV/dI versus V characteristic develops in a directio n opposite to the structure associated with the superconducting energy gap.