Electrical resistivity and thermopower of ErCo3 under hydrostatic pressure

The magnetic state of the Co 3d-electron subsystem of RCo3 compounds (R=rare-earth elements) with the rhombohedral PuNi3-type structure strongly depends on external parameters. In order to clarify the effect of pressure on the magnetic state of the itinerant Co 3d-electrons, we have measured the electrical resistivity and thermopower at temperatures from 2 K to 300 K under hydrostatic pressures up to 2 GPa. Both, rho and S show anomalies at critical temperature of metamagnetic transition T-m. With increasing pressure T-m, determined from the temperature-dependent resistivity and thermopower, decreases and apparently vanishes at P approximate to 0.7 GPa. The electrical resistivity and thermopower at low temperatures show abrupt changes at P approximate to 0.7 GPa, indicating a pressure-induced phase transition.