Electronic properties of magnetic superconductor HoNi2B2C under high pressure

The electrical resistivity of single crystalline HoNi2B2C has been measured at high pressure and magnetic fields. The three anomalies in the magnetoresistance due to metamagnetic transitions are observed both at ambient and high pressures. It is found that the metamagnetic transition fields increase with increasing pressure. The temperature dependence of electrical resistivity is strongly dependent on magnetic field. Non Fermi liquid behavior is observed near the metamagnetic transition fields. But the normal Fermi liquid behavior recovers after completing the phase transition. The Gruneisen parameters axe also calculated to examine the stability of electronic state.