Studies on the weak itinerant ferromagnet SrRuO 3 under high pressure to 34 GPa

The dependence of the Curie temperature T Curie on nearly hydrostatic pressure has been determined to 17 GPa for the weak itinerant ferromagnetic SrRuO 3 in both polycrystalline and single-crystalline form. T Curie is found to decrease under pressure from 162 K to 42.7 K at 17.2 GPa in nearly linear fashion at the rate dT Curie /dP ≃ −6.8 K/GPa. No superconductivity was found above 4 K in the pressure range 17 to 34 GPa where the ferromagnetism presumably vanishes. The room-temperature equation of state was determined to 25 GPa, yielding the bulk modulus B o = 183(3) GPa and its pressure derivative B ′ o = 6.5(4).