TRANSPORT-PROPERTIES, THERMODYNAMIC PROPERTIES, AND ELECTRONIC-STRUCTURE OF SRRUO3

SrRuO3 is a metallic ferromagnet. Its electrical resistivity is report ed for temperatures up to 1000 K, its Hall coefficient for temperature s up to 300 K, and its specific heat for temperatures up to 230 K. The energy bands have been calculated by self-consistent spin-density fun ctional theory, which finds a ferromagnetic ordered moment of 1.45 mu( B) per Ru atom. The measured linear specific heat coefficient gamma is 30 mJ/mol, which exceeds the theoretical value by a factor of 3.7. A transport mean free path at room temperature of approximate to 10 Angs trom is found. The resistivity increases nearly linearly with temperat ure to 1000 K in spite of such a short mean free path that resistivity saturation would be expected. The Hall coefficient is small and posit ive above the Curie temperature, and exhibits both a low-field and a h igh-field anomalous behavior below the Curie temperature.