Transport and magnetization in the badly metallic itinerant ferromagnet SrRuO₃

SrRuO₃ is an itinerant ferromagnet with T_c ∼ 160 K and a 'bad metal' in the limit of k_Fl = script O(l). While the magnetic properties of SrRuO₃ in the paramagnetic phase, near the ferromagnetic phase transition and at low temperatures are normal and consistent with its being a strong itinerant ferromagnet, the transport properties (resistivity and magnetoresistance) sharply deviate from that of good metallic ferromagnets. We conjecture that the distinct transport behaviour of SrRuO₃ is related to its being a 'bad metal' in the k_Fl = script O(l) limit, and discuss the possible relevance of our results to the unusual transport properties of other 'bad metals' such as high-temperature superconductors.