Pressure–temperature phase diagram of the ferromagnetic Kondo lattice compound CeRuPO

The new example of a ferromagnetic Kondo lattice, CeRuPO, is a good candidate which offers the opportunity to investigate the physical properties near a ferromagnetic instability. Macroscopic experiments evidenced a Kondo temperature TK=10K and Curie temperature of TC=14K. We have investigated the pressure–temperature phase diagram of CeRuPO by means of electrical resistivity measurements on high quality single crystals in the temperature interval from 1.8 to 300 K. The pressure dependence of the ordering temperature follows the anticipated behavior of a Ce-based Kondo lattice system, where pressure is expected to suppress the magnetic order. The critical pressure for the suppression of the transition temperature to zero is estimated to be pc≈3.2GPa.