INFLUENCE OF PRESSURE ON THE FERROMAGNETIC TRANSITION-TEMPERATURE OF SRRUO3

Measurements of electrical resistivity and AC magnetic susceptibility on the ferromagnetic oxide SrRuO3 under hydrostatic pressure in the ra nge 0 less-than-or-equal-to P less-than-or-equal-to 6.1 GPa yield the pressure derivative of the Curie temperature partial derivative T(c)/p artial-derivative P = -5.7 +/- 0.2 K/GPa where T(c)(P = 0) congruent-t o 165 K. This result is in qualitative agreement with the predictions of the Wohlfarth model. Our pressure results and the DC magnetization studies herein suggest the classification of this material as a modera tely weak itinerant ferromagnet.